Do not harcode version of wanted GCC

component/PyWavelets/buildout.cfg

 [buildout]
 extends =
-  ../gcc/buildout.cfg
   ../numpy/openblas.cfg
   ../cython/buildout.cfg
   ../scipy/buildout.cfg
@@ -20,8 +19,6 @@ setup-eggs =
   ${scipy:egg}
   ${cython:egg}
 rpath =
-  ${gcc:location}/lib
-  ${gcc:location}/lib64
   ${openblas:location}/lib
 
 [PyWavelets-repository]
@@ -42,6 +39,4 @@ setup-eggs =
   ${numpy:egg}
   ${scipy:egg}
 rpath =
-  ${gcc:location}/lib
-  ${gcc:location}/lib64
   ${openblas:location}/lib

component/bazel/bazel_tools_cpp_CROSSTOOL.in

@@ -105,15 +105,14 @@ toolchain {
   target_system_name: "local"
   toolchain_identifier: "local_linux"
 
-  tool_path { name: "ar" path: "{{ binutils_path }}/ar" }
-  tool_path { name: "compat-ld" path: "{{ binutils_path }}/ld" }
-  tool_path { name: "cpp" path: "{{ cpp_path }}" }
+  tool_path { name: "ar" path: "{{ binutils_location }}/bin/ar" }
+  tool_path { name: "compat-ld" path: "{{ gcc_location }}/bin/ld" }
+  tool_path { name: "cpp" path: "{{ gcc_location }}/bin/cpp" }
   tool_path { name: "dwp" path: "/usr/bin/dwp" }
-  tool_path { name: "gcc" path: "{{ gcc_path }}" }
+  tool_path { name: "gcc" path: "{{ gcc_location }}/bin/gcc" }
   cxx_flag: "-std=c++0x"
   linker_flag: "-lstdc++"
   linker_flag: "-B/usr/bin/"
-  linker_flag: "-Wl,rpath={{ gcc_lib64_path  }}"
 
   # TODO(bazel-team): In theory, the path here ought to exactly match the path
   # used by gcc. That works because bazel currently doesn't track files at
@@ -122,19 +121,19 @@ toolchain {
   cxx_builtin_include_directory: "/usr/lib/gcc/"
   cxx_builtin_include_directory: "/usr/local/include"
   cxx_builtin_include_directory: "/usr/include"
-  cxx_builtin_include_directory: "{{ include_path }}"
-  tool_path { name: "gcov" path: "{{ gconv_path }}" }
+  cxx_builtin_include_directory: "{{ gcc_location }}/include"
+  tool_path { name: "gcov" path: "{{ gcc_location }}/bin/gconv" }
 
   # C(++) compiles invoke the compiler (as that is the one knowing where
   # to find libraries), but we provide LD so other rules can invoke the linker.
-  tool_path { name: "ld" path: "{{ binutils_path }}/ld" }
+  tool_path { name: "ld" path: "{{ gcc_location }}/bin/ld" }
 
-  tool_path { name: "nm" path: "{{ binutils_path }}/nm" }
-  tool_path { name: "objcopy" path: "{{ binutils_path }}/objcopy" }
+  tool_path { name: "nm" path: "{{ binutils_location }}/bin/nm" }
+  tool_path { name: "objcopy" path: "{{ binutils_location }}/bin/objcopy" }
   objcopy_embed_flag: "-I"
   objcopy_embed_flag: "binary"
-  tool_path { name: "objdump" path: "{{ binutils_path }}/objdump" }
-  tool_path { name: "strip" path: "{{ binutils_path }}/strip" }
+  tool_path { name: "objdump" path: "{{ binutils_location }}/bin/objdump" }
+  tool_path { name: "strip" path: "{{ binutils_location }}/bin/strip" }
 
   # Anticipated future default.
   unfiltered_cxx_flag: "-no-canonical-prefixes"

component/bazel/buildout.cfg

 [buildout]
 extends =
-  ../gcc/buildout.cfg
+  ../defaults.cfg
   ../unzip/buildout.cfg
   ../zip/buildout.cfg
 parts =
@@ -22,19 +22,9 @@ mode = 640
 filename = bazel_tools_cpp_CROSSTOOL
 template = ${:_profile_base_location_}/${:filename}.in
 rendered = ${:location}/${:filename}
-cpp_path = ${gcc:location}/bin/cpp
-gcc_path = ${gcc:location}/bin/gcc
-binutils_path = ${binutils:location}/bin
-gconv_path = ${gcc:location}/bin/gconv
-include_path = ${gcc:location}/include
-gcc_lib64_path = ${gcc:location}/lib64
 context =
-    key cpp_path template-bazel-crosstool:cpp_path
-    key gcc_path template-bazel-crosstool:gcc_path
-    key binutils_path template-bazel-crosstool:binutils_path
-    key gconv_path template-bazel-crosstool:gconv_path
-    key include_path template-bazel-crosstool:include_path
-    key gcc_lib64_path template-bazel-crosstool:gcc_lib64_path
+    key gcc_location gcc:prefix
+    key binutils_location binutils:location
 
 [template-bazel-src-main-cpp-build]
 recipe = slapos.recipe.template:jinja2
@@ -43,9 +33,11 @@ mode = 640
 filename = bazel_src_main_cpp_BUILD
 template = ${:_profile_base_location_}/${:filename}.in
 rendered = ${:location}/${:filename}
-linkopts = -Wl,-rpath,${gcc:location}/lib64
+# We previously passed an argument that we don't want anymore. Rather than
+# changing templates, we pass a dummy argument that will have no effect.
+linkopts = -DSLAPOS_DUMMY=
 context =
-    key linkopts template-bazel-src-main-cpp-build:linkopts
+    key linkopts :linkopts
 
 [template-bazel-src-main-tools-build]
 <= template-bazel-src-main-cpp-build
@@ -67,9 +59,6 @@ bazel-src-main-tools-build-path = ${template-bazel-src-main-tools-build:rendered
 bazel-src-tools-singlejar-build-path = ${template-bazel-src-tools-singlejar-build:rendered}
 unzip-bin = ${unzip:location}/bin
 zip-bin = ${zip:location}/bin
-gcc-bin = ${gcc:location}/bin
-gcc-lib = ${gcc:location}/lib
-gcc-lib64 = ${gcc:location}/lib64
 java_home = ${zulu:location}
 bazelrc = ${:_profile_base_location_}/bazelrc
 install =
@@ -98,19 +87,10 @@ install =
   path = ':'.join((
     options['unzip-bin'],
     options['zip-bin'],
-    options['gcc-bin'],
     os.environ['PATH']
     ))
   env = {'JAVA_HOME':options['java_home'],
          'PATH':path,
-         'LD_LIBRARY_PATH':':'.join((
-           options['gcc-lib'],
-           options['gcc-lib64'],
-           os.environ.get('LD_LIBRARY_PATH', '')
-           )),
-         'LDFLAGS':'-Wl,-rpath='+options['gcc-lib64'],
-         'CC':options['gcc-bin']+'/gcc',
-         'CXX':options['gcc-bin']+'/g++',
          'BAZELRC':options['bazelrc'],
          'VERBOSE':'yes',
         }

component/boost-lib/buildout.cfg

@@ -3,7 +3,6 @@ parts =
   boost-lib
 extends =
   ../bzip2/buildout.cfg
-  ../gcc/buildout.cfg
   ../zlib/buildout.cfg
   ../xz-utils/buildout.cfg
 
@@ -17,9 +16,8 @@ configure-command = ./bootstrap.sh --prefix=${:location} --without-icu
 make-binary =
 make-options =
 make-targets = for a in $MAKEFLAGS; do case $a in -j*) j=$a; break;; esac; done;
-  ./b2 $j link=shared dll-path=${:location}/lib:${bzip2:location}/lib:${gcc:location}/lib:${gcc:location}/lib64:${zlib:location}/lib:${xz-utils:location}/lib install
+  ./b2 $j link=shared dll-path=${:location}/lib:${bzip2:location}/lib:${xz-utils:location}/lib:${zlib:location}/lib install
 environment =
-  PATH=${gcc:location}/bin:%(PATH)s
   BZIP2_INCLUDE=${bzip2:location}/include
   BZIP2_LIBPATH=${bzip2:location}/lib
   ZLIB_INCLUDE=${zlib:location}/include

component/caddy/buildout.cfg

@@ -8,8 +8,6 @@ parts =
 [gowork]
 # Caddy 1.x+ uses go modules, for which gowork does not work yet
 golang  = ${golang1.12:location}
-gcc-bin-directory  = ${golang1.12:gcc-bin-directory}
-
 install =
 
 [gowork.goinstall]

component/defaults.cfg

@@ -4,6 +4,11 @@ extends =
   python3/buildout.cfg
 python = python
 
+# Unless a software release needs several versions of either Python or GCC
+# at the same time, the [pythonX.Y] & [gcc-X.Y] must not be referred directly,
+# even if a component works only with specific versions.
+# There may be exceptions in profiles that were written before this one.
+
 [python]
 recipe = slapos.recipe.build
 part = python2.7
@@ -17,3 +22,50 @@ update =
   PATH = os.environ['PATH']
   if path not in PATH.split(os.pathsep):
     os.environ['PATH'] = path + os.pathsep + PATH
+depends = ${gcc:recipe}
+
+[gcc]
+recipe = slapos.recipe.build
+# Latest version provided by SlapOS.
+part = gcc-8.2
+# Minimum version for all components that might be required for
+# slapos.rebootstrap (see https://bugs.python.org/issue34112 about Python 3.7+).
+min_version = 5.4
+init =
+  import os, subprocess
+  parse_version = lambda ver: tuple(map(int, ver.strip().split('.')))
+  try:
+    current = subprocess.check_output(('gcc', '-dumpfullversion'),
+                                      stderr=subprocess.STDOUT,
+                                      universal_newlines=True).strip()
+  except subprocess.CalledProcessError: # BBB: old GCC
+    current = subprocess.check_output(('gcc', '-dumpversion'),
+                                      universal_newlines=True).strip()
+  self.system_version = current
+  # If we're still going to use the same GCC,
+  # the conditions have no impact on the dependant parts.
+  min_version = options.pop('min_version', None)
+  max_version = options.pop('max_version', None)
+  ###
+  if (parse_version(min_version or current)
+      <= parse_version(current)
+      <= parse_version(max_version or current)):
+    del options['part']
+    for path in os.getenv('PATH', '').split(os.pathsep): # PY3: shutil.which
+      gcc = os.path.join(path, 'gcc')
+      if os.access(gcc, os.X_OK) and not os.path.isdir(gcc):
+        options['prefix'] = os.path.dirname(path)
+        break
+  else:
+    options['prefix'] = self.buildout[options['part']]['location']
+  options.barrier()
+update =
+  if 'part' in options:
+    import os
+    env = os.environ
+    env['PATH'] = os.pathsep.join((
+      os.path.join(options['prefix'], 'bin'),
+      env['PATH']
+    ))
+  else:
+    print("Using system GCC (%s)" % self.system_version)

component/gcc/buildout.cfg

@@ -11,12 +11,16 @@ extends =
   ../zlib/buildout.cfg
 
 parts =
-  gcc
+  gcc-8.2
 
 [gcc-common]
 recipe = slapos.recipe.cmmi
 shared = true
 url = http://ftp.gnu.org/gnu/gcc/gcc-${:version}/gcc-${:version}.tar.xz
+pre-configure =
+  set %(location)s/bin
+  mkdir -p $1
+  ln -s ${binutils:location}/bin/ld $1/ld
 configure-options =
   --disable-bootstrap
   --disable-multilib
@@ -25,17 +29,33 @@ configure-options =
   --with-mpc=${mpc:location}
   --enable-languages="c,c++,fortran"
   --with-isl=${isl:location}
-  --with-ld=${binutils:location}/bin/ld
+  --with-ld=@@LOCATION@@/bin/ld
   --with-as=${binutils:location}/bin/as
 post-install =
-  cd '@@LOCATION@@/bin'
+  cd '%(location)s/bin'
   ln -s gcc cc
+  rm ld
+  for x in `for x in %(location)s/lib*/*.so; do echo $${x%%/*}; done |sort -u`
+  do set $1:$x "$2 -rpath=$x"
+  done
+  cat <<EOF >ld
+  #!/bin/sh -e
+  case \$#:\$1 in 0:|1:-*) ;; *)
+    if [ "\$LD_RUN_PATH" ]
+    then LD_RUN_PATH=\$LD_RUN_PATH$1
+    else set -- "\$@" $2
+    fi
+    ;;
+  esac
+  exec ${binutils:location}/bin/ld "\$@"
+  EOF
+  chmod +x ld
 environment =
   CPPFLAGS=-I${zlib:location}/include
   LDFLAGS=-Wl,-rpath=${gmp:location}/lib -Wl,-rpath=${isl:location}/lib -Wl,-rpath=${mpc:location}/lib -Wl,-rpath=${mpfr:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
   PATH=${binutils:location}/bin:${gettext:location}/bin:${perl:location}/bin:${tar:location}/bin:%(PATH)s
 
-[gcc]
+[gcc-5.5]
 <= gcc-common
 version = 5.5.0
 md5sum = 0f70424213b4a1113c04ba66ddda0c1f
@@ -52,7 +72,7 @@ version = 8.2.0
 md5sum = 4ab282f414676496483b3e1793d07862
 
 [gcc-minimal]
-<= gcc
+<= gcc-5.5
 configure-options =
   --disable-bootstrap
   --disable-multilib

component/glibmm/buildout.cfg

 [buildout]
 extends =
-  ../gcc/buildout.cfg
   ../gettext/buildout.cfg
   ../glib/buildout.cfg
   ../libsigc/buildout.cfg
@@ -19,8 +18,7 @@ pkg_config_depends = ${glib:location}/lib/pkgconfig:${libsigc:location}/lib/pkgc
 configure-options =
   --disable-documentation
 environment =
-  PATH=${gcc:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:${glib:location}/bin:%(PATH)s
+  PATH=${perl:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:${glib:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${:pkg_config_depends}
   CPPFLAGS=-I${gettext:location}/include
-  LD_LIBRARY_PATH=${gcc:location}/lib:${gcc:location}/lib64
-  LDFLAGS=-Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64 -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib
+  LDFLAGS=-L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib

component/golang/buildout.cfg

@@ -17,12 +17,9 @@ configure-command = :
 location = @@LOCATION@@
 make-binary =
 make-targets= cd src && ./all.bash && cp -alf .. ${:location}
-# gcc version to use
-gcc-bin-directory = ${gcc-8.2:location}/bin
 # some testdata files have an issue with slapos.extension.strip.
 post-install = ${findutils:location}/bin/find ${:location}/src -type d -name testdata -exec rm -rf {} \; || true
 environment =
-  PATH=${:gcc-bin-directory}:%(PATH)s
   GOROOT_FINAL=${:location}
   ${:environment-extra}
 
@@ -106,9 +103,6 @@ depends = ${gowork.goinstall:recipe}
 # go version used for the workspace (possible to override in applications)
 golang  = ${golang1.10:location}
 
-# gcc version must be compatible with go version selected
-gcc-bin-directory = ${golang1.10:gcc-bin-directory}
-
 # no special build flags by default
 buildflags =
 
@@ -120,7 +114,6 @@ recipe  = plone.recipe.command
 command = :
 
 # env.sh for compiling and running go programs
-[gowork]
 env.sh  = ${gowork-env.sh:output}
 
 [gowork-env.sh]
@@ -128,7 +121,7 @@ recipe	= slapos.recipe.template
 url     = ${:_profile_base_location_}/goenv.sh.in
 output	= ${gowork:directory}/env.sh
 depends = ${gowork.mkdir:recipe}
-md5sum	= 7eaad1f9aabd3cfad554975098c5d4c3
+md5sum	= 6bcf96cf18ea68ce6e378ed8d49346a3
 
 [gowork.mkdir]
 # NOTE do not use slapos.cookbook:mkdirectory here - if anything in software (not instance)

component/golang/goenv.sh.in

@@ -3,7 +3,7 @@
 
 # ---- 8< ---- (buildout substitution here)
 # PATH so that go & friends work out of the box
-export PATH=${gowork:golang}/bin:${git:location}/bin:${pkgconfig:location}/bin:${buildout:bin-directory}:${gowork:gcc-bin-directory}:$PATH
+export PATH=${gowork:golang}/bin:${git:location}/bin:${pkgconfig:location}/bin:${buildout:bin-directory}:${gcc:prefix}/bin:$PATH
 X=${gowork:directory}
 
 export PKG_CONFIG_PATH=$(echo -n "${gowork:cpkgpath}" |tr '\n' ':'):$PKG_CONFIG_PATH

component/gtkmm/buildout.cfg

@@ -2,7 +2,6 @@
 extends =
   ../bzip2/buildout.cfg
   ../freetype/buildout.cfg
-  ../gcc/buildout.cfg
   ../gettext/buildout.cfg
   ../glibmm/buildout.cfg
   ../gtk-2/buildout.cfg
@@ -23,11 +22,10 @@ configure-options =
   --disable-static
   --disable-documentation
 environment =
-  PATH=${freetype:location}/bin:${gcc:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
+  PATH=${freetype:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${:pkg_config_depends}
   CPPFLAGS=-I${libX11:location}/include -I${libXrender:location}/include -I${renderext:location}/include -I${xproto:location}/include
-  LD_LIBRARY_PATH=${gcc:location}/lib:${gcc:location}/lib64
-  LDFLAGS=-Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64 -L${libX11:location}/lib -Wl,-rpath=${libX11:location}/lib -L${libXext:location}/lib -Wl,-rpath=${libXext:location}/lib -L${libXrender:location}/lib -Wl,-rpath=${libXrender:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
+  LDFLAGS=-L${libX11:location}/lib -Wl,-rpath=${libX11:location}/lib -L${libXext:location}/lib -Wl,-rpath=${libXext:location}/lib -L${libXrender:location}/lib -Wl,-rpath=${libXrender:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
 
 [pangomm]
 recipe = slapos.recipe.cmmi
@@ -38,10 +36,9 @@ configure-options =
   --disable-static
   --disable-documentation
 environment =
-  PATH=${gcc:location}/bin:${glib:location}/bin:${freetype:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
+  PATH=${glib:location}/bin:${freetype:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${:pkg_config_depends}
-  LD_LIBRARY_PATH=${gcc:location}/lib:${gcc:location}/lib64
-  LDFLAGS=-Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64 -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib -L${harfbuzz:location}/lib -Wl,-rpath=${harfbuzz:location}/lib
+  LDFLAGS=-L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib -L${harfbuzz:location}/lib -Wl,-rpath=${harfbuzz:location}/lib
 
 [atkmm]
 recipe = slapos.recipe.cmmi
@@ -52,10 +49,9 @@ configure-options =
   --disable-static
   --disable-documentation
 environment =
-  PATH=${gcc:location}/bin:${glib:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
+  PATH=${glib:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${:pkg_config_depends}
-  LD_LIBRARY_PATH=${gcc:location}/lib:${gcc:location}/lib64
-  LDFLAGS=-Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64 -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib
+  LDFLAGS=-L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib
 
 [gtkmm]
 recipe = slapos.recipe.cmmi
@@ -66,7 +62,6 @@ configure-options =
   --disable-static
   --disable-documentation
 environment =
-  PATH=${gcc:location}/bin:${gdk-pixbuf:location}/bin:${glib:location}/bin:${gtk-2:location}/bin:${pango:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
+  PATH=${gdk-pixbuf:location}/bin:${glib:location}/bin:${gtk-2:location}/bin:${pango:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:${xz-utils:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${:pkg_config_depends}
-  LD_LIBRARY_PATH=${gcc:location}/lib:${gcc:location}/lib64
-  LDFLAGS=-L${bzip2:location}/lib -Wl,-rpath=${bzip2:location}/lib -Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64 -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${harfbuzz:location}/lib -Wl,-rpath=${harfbuzz:location}/lib
+  LDFLAGS=-L${bzip2:location}/lib -Wl,-rpath=${bzip2:location}/lib -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${harfbuzz:location}/lib -Wl,-rpath=${harfbuzz:location}/lib

component/helloweb/buildout.cfg

@@ -26,7 +26,6 @@ install =
     lab.nexedi.com/nexedi/helloweb/go/...
 
 golang  = ${golang1.12:location}
-gcc-bin-directory  = ${golang1.12:gcc-bin-directory}
 
 # -*- go -*-
 [helloweb-go]

component/icu/buildout.cfg

 [buildout]
-extends =
-  ../gcc/buildout.cfg
 parts = icu4c
 
 [icu4c]
@@ -17,14 +15,6 @@ configure-options =
 patches =
   ${:_profile_base_location_}/fix-glibc2.26-ftbfs.patch#f1622be16964029fc66a70b8f9e1693c
 
-[icu4c-slaposgcc]
-# need for onlyoffice-core
-<= icu4c
-environment =
-  PATH=${gcc:location}/bin:%(PATH)s
-  LD_LIBRARY_PATH=${gcc:location}/lib:${gcc:location}/lib64
-  LDFLAGS=-Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64
-
 [icu]
 <= icu4c
 

component/inkscape/buildout.cfg

@@ -6,7 +6,6 @@ extends =
   ../cmake/buildout.cfg
   ../freetype/buildout.cfg
   ../garbage-collector/buildout.cfg
-  ../gcc/buildout.cfg
   ../gettext/buildout.cfg
   ../glibmm/buildout.cfg
   ../gtk-2/buildout.cfg
@@ -32,10 +31,9 @@ md5sum = bda73a3dd5ff2f30b5956764399db6e7
 configure-options =
   --disable-static
 environment =
-  PATH=${gcc:location}/bin:${glib:location}/bin:${pkgconfig:location}/bin:%(PATH)s
+  PATH=${glib:location}/bin:${pkgconfig:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${atk:location}/lib/pkgconfig:${glib:location}/lib/pkgconfig:${glibmm:location}/lib/pkgconfig:${libsigc:location}/lib/pkgconfig:${pcre:location}/lib/pkgconfig
-  LD_LIBRARY_PATH=${gcc:location}/lib:${gcc:location}/lib64
-  LDFLAGS=-Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64 -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib
+  LDFLAGS=-L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib
 
 [inkscape]
 recipe = slapos.recipe.cmmi
@@ -53,8 +51,8 @@ configure-options =
   -DWITH_LIBVISIO=OFF
   -DWITH_LIBWPG=OFF
 environment =
-  PATH=${cmake:location}/bin:${freetype:location}/bin:${gcc:location}/bin:${gdk-pixbuf:location}/bin:${gettext:location}/bin:${glib:location}/bin:${intltool:location}/bin:${libxml2:location}/bin:${pango:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:%(PATH)s
+  PATH=${cmake:location}/bin:${freetype:location}/bin:${gdk-pixbuf:location}/bin:${gettext:location}/bin:${glib:location}/bin:${intltool:location}/bin:${libxml2:location}/bin:${pango:location}/bin:${perl:location}/bin:${pkgconfig:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${:pkg_config_depends}
   CMAKE_INCLUDE_PATH=${boost-lib:location}/include:${freetype:location}/include:${garbage-collector:location}/include:${libjpeg:location}/include:${lcms2:location}/include:${libpng:location}/include:${zlib:location}/include
-  CMAKE_LIBRARY_PATH=${boost-lib:location}/lib:${freetype:location}/lib:${garbage-collector:location}/lib:${gcc:location}/lib:${gcc:location}/lib64:${lcms2:location}/lib:${libjpeg:location}/lib:${libpng:location}/lib:${zlib:location}/lib
-  LDFLAGS=-L${atk:location}/lib -Wl,-rpath=${atk:location}/lib -L${atkmm:location}/lib -Wl,-rpath=${atkmm:location}/lib -L${boost-lib:location}/lib -Wl,-rpath=${boost-lib:location}/lib -L${bzip2:location}/lib -Wl,-rpath=${bzip2:location}/lib -L${cairo:location}/lib -Wl,-rpath=${cairo:location}/lib -L${cairomm:location}/lib -Wl,-rpath=${cairomm:location}/lib -L${fontconfig:location}/lib -Wl,-rpath=${fontconfig:location}/lib -L${freetype:location}/lib -Wl,-rpath=${freetype:location}/lib -L${garbage-collector:location}/lib -Wl,-rpath=${garbage-collector:location}/lib -Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64 -L${gdk-pixbuf:location}/lib -Wl,-rpath=${gdk-pixbuf:location}/lib -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib -L${glib:location}/lib -Wl,-rpath=${glib:location}/lib -L${glibmm:location}/lib -Wl,-rpath=${glibmm:location}/lib -L${gsl:location}/lib -Wl,-rpath=${gsl:location}/lib -L${gtk-2:location}/lib -Wl,-rpath=${gtk-2:location}/lib -L${gtkmm:location}/lib -Wl,-rpath=${gtkmm:location}/lib -L${lcms2:location}/lib -Wl,-rpath=${lcms2:location}/lib -L${libX11:location}/lib -Wl,-rpath=${libX11:location}/lib -L${libXext:location}/lib -Wl,-rpath=${libXext:location}/lib -L${libjpeg:location}/lib -Wl,-rpath=${libjpeg:location}/lib -L${libpng:location}/lib -Wl,-rpath=${libpng:location}/lib -L${libsigc:location}/lib -Wl,-rpath=${libsigc:location}/lib -L${libxml2:location}/lib -Wl,-rpath=${libxml2:location}/lib -L${libxslt:location}/lib -Wl,-rpath=${libxslt:location}/lib -L${pango:location}/lib -Wl,-rpath=${pango:location}/lib -L${pangomm:location}/lib -Wl,-rpath=${pangomm:location}/lib -L${popt:location}/lib -Wl,-rpath=${popt:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
+  CMAKE_LIBRARY_PATH=${boost-lib:location}/lib:${freetype:location}/lib:${garbage-collector:location}/lib:${lcms2:location}/lib:${libjpeg:location}/lib:${libpng:location}/lib:${zlib:location}/lib
+  LDFLAGS=-L${atk:location}/lib -Wl,-rpath=${atk:location}/lib -L${atkmm:location}/lib -Wl,-rpath=${atkmm:location}/lib -L${boost-lib:location}/lib -Wl,-rpath=${boost-lib:location}/lib -L${bzip2:location}/lib -Wl,-rpath=${bzip2:location}/lib -L${cairo:location}/lib -Wl,-rpath=${cairo:location}/lib -L${cairomm:location}/lib -Wl,-rpath=${cairomm:location}/lib -L${fontconfig:location}/lib -Wl,-rpath=${fontconfig:location}/lib -L${freetype:location}/lib -Wl,-rpath=${freetype:location}/lib -L${garbage-collector:location}/lib -Wl,-rpath=${garbage-collector:location}/lib -L${gdk-pixbuf:location}/lib -Wl,-rpath=${gdk-pixbuf:location}/lib -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib -L${glib:location}/lib -Wl,-rpath=${glib:location}/lib -L${glibmm:location}/lib -Wl,-rpath=${glibmm:location}/lib -L${gsl:location}/lib -Wl,-rpath=${gsl:location}/lib -L${gtk-2:location}/lib -Wl,-rpath=${gtk-2:location}/lib -L${gtkmm:location}/lib -Wl,-rpath=${gtkmm:location}/lib -L${lcms2:location}/lib -Wl,-rpath=${lcms2:location}/lib -L${libX11:location}/lib -Wl,-rpath=${libX11:location}/lib -L${libXext:location}/lib -Wl,-rpath=${libXext:location}/lib -L${libjpeg:location}/lib -Wl,-rpath=${libjpeg:location}/lib -L${libpng:location}/lib -Wl,-rpath=${libpng:location}/lib -L${libsigc:location}/lib -Wl,-rpath=${libsigc:location}/lib -L${libxml2:location}/lib -Wl,-rpath=${libxml2:location}/lib -L${libxslt:location}/lib -Wl,-rpath=${libxslt:location}/lib -L${pango:location}/lib -Wl,-rpath=${pango:location}/lib -L${pangomm:location}/lib -Wl,-rpath=${pangomm:location}/lib -L${popt:location}/lib -Wl,-rpath=${popt:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib

component/jsl/buildout.cfg

@@ -8,6 +8,10 @@ parts = jsl
 recipe = slapos.recipe.build
 url = http://www.javascriptlint.com/download/jsl-0.3.0-src.tar.gz
 md5sum = 2b94ffa4fab07acabe0c5e73cd49bcdf
+init =
+  import os
+# Bypass slapos gcc if any because slapos ld can't find -lm (why?).
+  self.path = os.environ['PATH']
 install =
   import os
   import sys
@@ -15,5 +19,5 @@ install =
   md5sum = options['md5sum']
   extract_dir = self.extract(self.download(url, md5sum))
   workdir = guessworkdir(extract_dir)
-  os.chdir(os.path.join(workdir, 'src'))
-  os.system("make -f Makefile.ref -j 1 DIST='%s' all export" % location)
+  call(('make', '-f', 'Makefile.ref', '-j1', 'DIST=' + location, 'all', 'export'),
+    cwd=os.path.join(workdir, 'src'), env=dict(os.environ, PATH=self.path))

component/kumo/buildout.cfg

 [buildout]
 extends =
-  ../gcc/buildout.cfg
   ../tokyocabinet/buildout.cfg
   ../messagepack/buildout.cfg
   ../openssl/buildout.cfg
@@ -25,7 +24,5 @@ configure-options =
 
 environment =
   CPPFLAGS=-I${zlib:location}/include -I${openssl:location}/include
-  LD_LIBRARY_PATH=${gcc:location}/lib:${gcc:location}/lib64
-  LDFLAGS=-Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64 -L${zlib:location}/lib -L${openssl:location}/lib -Wl,-rpath=${tokyocabinet:location}/lib -Wl,-rpath=${messagepack:location}/lib -Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${openssl:location}/lib
-  PATH=${gcc:location}/bin:${patch:location}/bin:%(PATH)s
-# KumoFS is known not to build with gcc>6, so we use our own gcc which is 5.5
\ No newline at end of file
+  LDFLAGS=-L${zlib:location}/lib -L${openssl:location}/lib -Wl,-rpath=${tokyocabinet:location}/lib -Wl,-rpath=${messagepack:location}/lib -Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${openssl:location}/lib
+  PATH=${patch:location}/bin:%(PATH)s

component/libatlas/buildout.cfg

@@ -39,5 +39,4 @@ configure-options =
 make-options =
   -C build
 environment =
-  PATH=${gcc:location}/bin:${patch:location}/bin:%(PATH)s
-  LD_LIBRARY_PATH=${gcc:location}/lib:${gcc:location}/lib64
+  PATH=${patch:location}/bin:%(PATH)s

component/libsigc/buildout.cfg

 [buildout]
 extends =
-  ../gcc/buildout.cfg
   ../m4/buildout.cfg
   ../perl/buildout.cfg
   ../xz-utils/buildout.cfg
@@ -16,6 +15,4 @@ md5sum = 70bcbde2c900e4925d6ef4bf50954195
 configure-options =
   --disable-documentation
 environment =
-  PATH=${gcc:location}/bin:${m4:location}/bin:${perl:location}/bin:${xz-utils:location}/bin:%(PATH)s
-  LD_LIBRARY_PATH=${gcc:location}/lib:${gcc:location}/lib64
-  LDFLAGS=-Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64
+  PATH=${m4:location}/bin:${perl:location}/bin:${xz-utils:location}/bin:%(PATH)s

component/mariadb/buildout.cfg

@@ -21,7 +21,6 @@ extends =
   ../xz-utils/buildout.cfg
   ../zlib/buildout.cfg
   ../unixodbc/buildout.cfg
-  ../gcc/buildout.cfg
   ../zstd/buildout.cfg
 
 parts =
@@ -69,13 +68,13 @@ configure-options =
   -DCMAKE_INCLUDE_PATH=${unixodbc:location}/include
   -DCMAKE_LIBRARY_PATH=${unixodbc:location}/lib
 CMAKE_CFLAGS = -I${bzip2:location}/include -I${jemalloc:location}/include -I${libaio:location}/include -I${libxml2:location}/include -I${ncurses:location}/include -I${openssl:location}/include -I${pcre:location}/include -I${readline5:location}/include -I${xz-utils:location}/include -I${zlib:location}/include -I${unixodbc:location}/include -I${lz4:location}/include -I${snappy:location}/include -I${zstd:location}/include
-CMAKE_LIBRARY_PATH = ${bzip2:location}/lib:${jemalloc:location}/lib:${libaio:location}/lib:${libxml2:location}/lib:${ncurses:location}/lib:${openssl:location}/lib:${pcre:location}/lib:${readline5:location}/lib:${xz-utils:location}/lib:${zlib:location}/lib:${unixodbc:location}/lib:${lz4:location}/lib:${snappy:location}/lib:${zstd:location}/lib:${gcc:location}/lib:${gcc:location}/lib64
+CMAKE_LIBRARY_PATH = ${bzip2:location}/lib:${jemalloc:location}/lib:${libaio:location}/lib:${libxml2:location}/lib:${ncurses:location}/lib:${openssl:location}/lib:${pcre:location}/lib:${readline5:location}/lib:${xz-utils:location}/lib:${zlib:location}/lib:${unixodbc:location}/lib:${lz4:location}/lib:${snappy:location}/lib:${zstd:location}/lib
 environment =
   CMAKE_PROGRAM_PATH=${cmake:location}/bin
   CMAKE_INCLUDE_PATH=${bzip2:location}/include:${libaio:location}/include:${libaio:location}/include:${libxml2:location}/include:${ncurses:location}/include:${openssl:location}/include:${pcre:location}/include:${readline5:location}/include:${xz-utils:location}/include:${zlib:location}/include:${unixodbc:location}/include:${lz4:location}/include:${snappy:location}/include:${zstd:location}/include
   CMAKE_LIBRARY_PATH=${:CMAKE_LIBRARY_PATH}
   LDFLAGS=-L${bzip2:location}/lib -L${jemalloc:location}/lib -L${libaio:location}/lib -L${pcre:location}/lib -L${xz-utils:location}/lib -L${zlib:location}/lib -L${unixodbc:location}/lib -L${lz4:location}/lib -L${snappy:location}/lib -L${zstd:location}/lib
-  PATH=${gcc:location}/bin:${patch:location}/bin:%(PATH)s
+  PATH=${patch:location}/bin:%(PATH)s
 patch-options = -p1
 patches =
   https://sources.debian.org/data/main/m/mariadb-10.3/1:10.3.22-0+deb10u1/debian/patches/0024-Revert-to-using-system-pcre-library.patch#1c6a0f2634f5a56122299674b77b1131

component/nodejs/buildout.cfg

@@ -7,7 +7,6 @@ extends =
   ../openssl/buildout.cfg
   ../zlib/buildout.cfg
   ../python-2.7/buildout.cfg
-  ../gcc/buildout.cfg
 
 parts =
   nodejs
@@ -57,10 +56,10 @@ configure-options =
   --shared-openssl-libpath=${:openssl_location}/lib
 environment =
   HOME=@@LOCATION@@
-  PATH=${gcc:location}/bin:${pkgconfig:location}/bin:%(PATH)s
+  PATH=${pkgconfig:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${:openssl_location}/lib/pkgconfig/
   CPPFLAGS=-I${zlib:location}/include
-  LDFLAGS=-Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64 -Wl,-rpath=${:openssl_location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
+  LDFLAGS=-Wl,-rpath=${:openssl_location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
   LD_LIBRARY_PATH=${:openssl_location}/lib
 
 [nodejs-8.6.0-output]

component/numpy/openblas.cfg

 [buildout]
-
 extends =
   buildout.cfg
-  ../gcc/buildout.cfg
   ../openblas/buildout.cfg
 
 [numpy-env]
-PATH = ${gcc:location}/bin:%(PATH)s
 OPENBLAS = ${openblas:location}/lib/libopenblas.so
 LAPACK = ${openblas:location}/lib/libopenblas.so
 ATLAS = ${openblas:location}/lib/libopenblas.so
@@ -14,6 +11,4 @@ ATLAS = ${openblas:location}/lib/libopenblas.so
 [numpy]
 environment = numpy-env
 rpath =
-  ${gcc:location}/lib
-  ${gcc:location}/lib64
   ${openblas:location}/lib

component/onlyoffice-core/buildout.cfg

 [buildout]
 extends =
   ../binutils/buildout.cfg
-  ../gcc/buildout.cfg
   ../libxml2/buildout.cfg
   ../zlib/buildout.cfg
   ../icu/buildout.cfg
@@ -21,9 +20,9 @@ md5sum = 9cd1cd731202511e475971eee58ba7b6
 configure-command = true
 make-targets = lib bin
 environment =
-  PATH=${binutils:location}/bin:${gcc:location}/bin:${qt5-qmake:location}/bin:%(PATH)s
-  CXXFLAGS=-I${libxml2:location}/include -I${zlib:location}/include -I${icu4c-slaposgcc:location}/include -I${boost-lib:location}/include -Wno-comment -Wno-deprecated-declarations -Wno-endif-labels -Wno-parentheses -Wno-reorder -Wno-sign-compare -Wno-switch -Wno-unknown-pragmas -Wno-unused
-  LDFLAGS=-L${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib -L${gcc:location}/lib64 -Wl,-rpath=${gcc:location}/lib64 -L${libxml2:location}/lib -Wl,-rpath=${libxml2:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${icu4c-slaposgcc:location}/lib -Wl,-rpath=${icu4c-slaposgcc:location}/lib -L${boost-lib:location}/lib -Wl,-rpath=${boost-lib:location}/lib -Wl,-rpath=${:location}/lib
+  PATH=${binutils:location}/bin:${qt5-qmake:location}/bin:%(PATH)s
+  CXXFLAGS=-I${libxml2:location}/include -I${zlib:location}/include -I${icu4c:location}/include -I${boost-lib:location}/include -Wno-comment -Wno-deprecated-declarations -Wno-endif-labels -Wno-parentheses -Wno-reorder -Wno-sign-compare -Wno-switch -Wno-unknown-pragmas -Wno-unused
+  LDFLAGS=-L${libxml2:location}/lib -Wl,-rpath=${libxml2:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${icu4c:location}/lib -Wl,-rpath=${icu4c:location}/lib -L${boost-lib:location}/lib -Wl,-rpath=${boost-lib:location}/lib -Wl,-rpath=${:location}/lib
 post-install =
   set -x
   mkdir -p ${:location}/bin ${:location}/lib

component/openblas/buildout.cfg

@@ -6,9 +6,6 @@ extends =
 parts =
   openblas
 
-extends =
-  ../gcc/buildout.cfg
-
 [openblas]
 recipe = slapos.recipe.cmmi
 shared = true
@@ -29,6 +26,9 @@ build-common-options = BINARY="$(uname -m | grep -q x86_64 && echo 64 || echo 32
 #   TARGET=HASWELL
 build-ext-options =
 
+# Fortran is required for LAPACK, which is required for matplotlib.
+pre-configure = type gfortran
+
 # First try with auto-detected target and if it fails try TARGET=GENERIC.
 configure-command =
   make ${:build-common-options} ${:build-ext-options} || (make -j1 clean && make ${:build-common-options} TARGET=GENERIC)
@@ -37,6 +37,4 @@ make-options =
 make-targets =
   PREFIX="@@LOCATION@@" install
 environment =
-  PATH=${gcc:location}/bin:${patch:location}/bin:${perl:location}/bin:%(PATH)s
-  LD_LIBRARY_PATH=${gcc:location}/lib:${gcc:location}/lib64
-  LDFLAGS=-Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64
+  PATH=${patch:location}/bin:${perl:location}/bin:%(PATH)s

component/powerdns/buildout.cfg

@@ -4,7 +4,6 @@ extends =
   ../automake/buildout.cfg
   ../bison/buildout.cfg
   ../flex/buildout.cfg
-  ../gcc/buildout.cfg
   ../git/buildout.cfg
   ../boost-lib/buildout.cfg
   ../libtool/buildout.cfg
@@ -28,7 +27,7 @@ configure-options =
   --with-dynmodules=""
   --without-lua
 environment =
-  PATH=${gcc:location}/bin:${make:location}/bin:${libtool:location}/bin:${pkgconfig:location}/bin:${bison:location}/bin:${flex:location}/bin:${git:location}/bin:${ragel:location}/bin:%(PATH)s
+  PATH=${make:location}/bin:${libtool:location}/bin:${pkgconfig:location}/bin:${bison:location}/bin:${flex:location}/bin:${git:location}/bin:${ragel:location}/bin:%(PATH)s
   LDFLAGS=-L${boost-lib:location}/lib -Wl,-rpath=${boost-lib:location}/lib -L${zlib:location}/lib -Wl,-rpath -Wl,${zlib:location}/lib -lz
   CPPFLAGS=-I${boost-lib:location}/include
 make-target =

component/python-2.7/buildout.cfg

@@ -67,10 +67,9 @@ post-install = cd '${:prefix}' &&
   sed -n 's,:#! */usr/bin/env \+python2\?$,,p' |
   xargs -d '\n' sed -i '1s,.*,#!${:executable},'
 
-extra-ldflags =
 # the entry "-Wl,-rpath=${file:location}/lib" below is needed by python-magic,
 # which would otherwise load the system libmagic.so with ctypes
 environment =
   PATH=${patch:location}/bin:${xz-utils:location}/bin:%(PATH)s
   CPPFLAGS=-I${zlib:location}/include -I${readline:location}/include -I${libexpat:location}/include -I${libffi:location}/include -I${ncurses:location}/include -I${ncurses:location}/include/ncursesw -I${bzip2:location}/include  -I${gdbm:location}/include -I${openssl:location}/include -I${sqlite3:location}/include -I${gettext:location}/include
-  LDFLAGS=-L${zlib:location}/lib -L${readline:location}/lib -L${libexpat:location}/lib -L${libffi:location}/lib -L${ncurses:location}/lib -L${bzip2:location}/lib -L${gdbm:location}/lib -L${openssl:location}/lib -L${sqlite3:location}/lib -Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${readline:location}/lib -Wl,-rpath=${libexpat:location}/lib -Wl,-rpath=${libffi:location}/lib -Wl,-rpath=${ncurses:location}/lib -Wl,-rpath=${bzip2:location}/lib -Wl,-rpath=${gdbm:location}/lib -Wl,-rpath=${openssl:location}/lib -Wl,-rpath=${sqlite3:location}/lib -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib -Wl,-rpath=${file:location}/lib ${:extra-ldflags}
+  LDFLAGS=-L${zlib:location}/lib -L${readline:location}/lib -L${libexpat:location}/lib -L${libffi:location}/lib -L${ncurses:location}/lib -L${bzip2:location}/lib -L${gdbm:location}/lib -L${openssl:location}/lib -L${sqlite3:location}/lib -Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${readline:location}/lib -Wl,-rpath=${libexpat:location}/lib -Wl,-rpath=${libffi:location}/lib -Wl,-rpath=${ncurses:location}/lib -Wl,-rpath=${bzip2:location}/lib -Wl,-rpath=${gdbm:location}/lib -Wl,-rpath=${openssl:location}/lib -Wl,-rpath=${sqlite3:location}/lib -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib -Wl,-rpath=${file:location}/lib

component/python3/buildout.cfg

@@ -58,9 +58,6 @@ version = 3.6
 package_version = 3.6.10
 md5sum = 986078f11b39074be22a199e56491d98
 
-# Python 3.7 have to use gcc 8(actually, gcc 4+)
-# See https://bugs.python.org/issue34112
-# I think gcc 5 may meet the requirement, use gcc 8 all in one step
 [python3.7]
 <= python3-common
 version = 3.7
@@ -69,7 +66,7 @@ md5sum = df6ec36011808205beda239c72f947cb
 patch-options =
 patches =
 environment =
-  PATH=${gcc-8.2:location}/bin::${xz-utils:location}/bin:%(PATH)s
+  PATH=${xz-utils:location}/bin:%(PATH)s
   CPPFLAGS=-I${zlib:location}/include -I${xz-utils:location}/include -I${readline:location}/include -I${libexpat:location}/include -I${libffi:location}/include -I${ncurses:location}/include -I${ncurses:location}/include/ncursesw -I${bzip2:location}/include  -I${gdbm:location}/include -I${openssl:location}/include -I${sqlite3:location}/include -I${gettext:location}/include
   LDFLAGS=-L${zlib:location}/lib -L${xz-utils:location}/lib -L${readline:location}/lib -L${libexpat:location}/lib -L${libffi:location}/lib -L${ncurses:location}/lib -L${bzip2:location}/lib -L${gdbm:location}/lib -L${openssl:location}/lib -L${sqlite3:location}/lib -Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${xz-utils:location}/lib -Wl,-rpath=${readline:location}/lib -Wl,-rpath=${libexpat:location}/lib -Wl,-rpath=${libffi:location}/lib -Wl,-rpath=${ncurses:location}/lib -Wl,-rpath=${bzip2:location}/lib -Wl,-rpath=${gdbm:location}/lib -Wl,-rpath=${openssl:location}/lib -Wl,-rpath=${sqlite3:location}/lib -L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib -Wl,-rpath=${file:location}/lib
-  LD_LIBRARY_PATH=${libpng:location}/lib:${gcc-8.2:location}/lib:${gcc-8.2:location}/lib64
\ No newline at end of file
+#  LD_LIBRARY_PATH=${libpng:location}/lib

component/pytorch/buildout.cfg

 [buildout]
 extends =
-  ../gcc/buildout.cfg
   ../openblas/buildout.cfg
   ../cmake/buildout.cfg
   ../python-cffi/buildout.cfg
@@ -57,7 +56,6 @@ no-cuda = 0
 cmake-bin = ${cmake:location}/bin
 git-bin = ${git:location}/bin
 binutils-location = ${binutils:location}
-gcc-location = ${gcc:location}
 openblas-location = ${openblas:location}
 install =
   import os, shutil
@@ -65,31 +63,20 @@ install =
   workdir = options['workdir']
   python_bin = options['python-bin']
   binutils_location = options['binutils-location']
-  gcc_location = options['gcc-location']
   openblas_location = options['openblas-location']
   env = {'PYTHONPATH':workdir,
          'PATH':':'.join([options['cmake-bin'],
                           options['git-bin'],
                           binutils_location+'/bin',
-                          gcc_location+'/bin',
                           os.environ['PATH']]),
-         'CMAKE_INCLUDE_PATH':':'.join([gcc_location+'/include',
-                                        binutils_location+'/include',
+         'CMAKE_INCLUDE_PATH':':'.join([binutils_location+'/include',
                                         openblas_location+'/include',
                                         ]),
-         'CMAKE_LIBRARY_PATH':':'.join([gcc_location+'/lib',
-                                        gcc_location+'/lib64',
-                                        binutils_location+'/lib',
+         'CMAKE_LIBRARY_PATH':':'.join([binutils_location+'/lib',
                                         openblas_location+'/lib',
                                         ]),
-         'CC':gcc_location+'/bin/gcc',
-         'CXX':gcc_location+'/bin/g++',
          'PYTORCH_PYTHON':python_bin,
-         'SLAPOS_COMPILE_ARGS':' '.join(['-Wl,-rpath,'+gcc_location+'/lib',
-                                         '-Wl,-rpath,'+gcc_location+'/lib64',
-                                         '-Wl,-rpath,'+binutils_location+'/lib',
-                                         '-Wl,-rpath,'+openblas_location+'/lib',
-                                         ])
+         'SLAPOS_COMPILE_ARGS':'-Wl,-rpath,'+openblas_location+'/lib',
          }
   if options.get('no-cuda') == '1':
     env['NO_CUDA'] = '1'

component/qt/buildout.cfg

 [buildout]
 extends =
   ../xorg/buildout.cfg
-  ../gcc/buildout.cfg
 
 parts =
   qt4-qmake
@@ -23,9 +22,8 @@ configure-options =
   -no-opengl
   -nomake examples
 environment =
-  PATH=${gcc:location}/bin:%(PATH)s
   CPPFLAGS=-I${libX11:location}/include -I${xproto:location}/include -I${libXext:location}/include
-  LDFLAGS=-L${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib -L${gcc:location}/lib64 -Wl,-rpath=${gcc:location}/lib64 -L${libX11:location}/lib -Wl,-rpath=${libX11:location}/lib -L${xproto:location}/lib -Wl,-rpath=${xproto:location}/lib -L${libXext:location}/lib -Wl,-rpath=${libXext:location}/lib
+  LDFLAGS=-L${libX11:location}/lib -Wl,-rpath=${libX11:location}/lib -L${xproto:location}/lib -Wl,-rpath=${xproto:location}/lib -L${libXext:location}/lib -Wl,-rpath=${libXext:location}/lib
 make-binary = true
 post-install =
   mkdir -p ${:location}/bin

component/r-language/buildout.cfg

 [buildout]
 extends =
   ../bzip2/buildout.cfg
-  ../gcc/buildout.cfg
   ../openblas/buildout.cfg
   ../pcre/buildout.cfg
   ../readline/buildout.cfg
@@ -32,6 +31,5 @@ configure-options =
   --without-ICU
   --without-x
 environment =
-  PATH=${gcc:location}/bin:%(PATH)s
   CPPFLAGS=-I${bzip2:location}/include -I${openblas:location}/include -I${pcre:location}/include -I${readline:location}/include -I${ncurses:location}/include -I${xz-utils:location}/include -I${zlib:location}/include
-  LDFLAGS=-L${bzip2:location}/lib -Wl,-rpath=${bzip2:location}/lib -L${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib -L${gcc:location}/lib64 -Wl,-rpath=${gcc:location}/lib64 -L${ncurses:location}/lib -Wl,-rpath=${ncurses:location}/lib -L${openblas:location}/lib -Wl,-rpath=${openblas:location}/lib -L${pcre:location}/lib -Wl,-rpath=${pcre:location}/lib -L${readline:location}/lib -Wl,-rpath=${readline:location}/lib -L${xz-utils:location}/lib -Wl,-rpath=${xz-utils:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
+  LDFLAGS=-L${bzip2:location}/lib -Wl,-rpath=${bzip2:location}/lib -L${ncurses:location}/lib -Wl,-rpath=${ncurses:location}/lib -L${openblas:location}/lib -Wl,-rpath=${openblas:location}/lib -L${pcre:location}/lib -Wl,-rpath=${pcre:location}/lib -L${readline:location}/lib -Wl,-rpath=${readline:location}/lib -L${xz-utils:location}/lib -Wl,-rpath=${xz-utils:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib

component/ragel/buildout.cfg

 [buildout]
 extends =
-  ../../component/gcc/buildout.cfg
-  ../../component/make/buildout.cfg
+  ../make/buildout.cfg
 
 parts =
   ragel
@@ -10,10 +9,5 @@ parts =
 recipe = slapos.recipe.cmmi
 url = http://www.colm.net/files/ragel/ragel-6.8.tar.gz
 md5sum = 1bb39745ac23da449019f9f2cb4b0d01
-configure-options =
-  --prefix=${buildout:parts-directory}/${:_buildout_section_name_}
 environment =
-  PATH=${make:location}/bin:${gcc:location}/bin:%(PATH)s
-make-target =
-  
-  install
+  PATH=${make:location}/bin:%(PATH)s

component/rpy2/buildout.cfg

 [buildout]
 extends =
-  ../gcc/buildout.cfg
   ../pcre/buildout.cfg
   ../r-language/buildout.cfg
   ../xz-utils/buildout.cfg
@@ -10,7 +9,7 @@ extends =
 # see ../manpy/buildout.cfg as an example
 
 [rpy2_env]
-PATH = ${gcc:location}/bin:${r-language:location}/bin:%(PATH)s
+PATH = ${r-language:location}/bin:%(PATH)s
 
 [rpy2]
 recipe = zc.recipe.egg:custom
@@ -21,8 +20,6 @@ initialization =
   import os
   os.environ['PATH'] = '${r-language:location}/bin' + os.pathsep + os.environ.get('PATH', '')
 rpath =
-  ${gcc:location}/lib
-  ${gcc:location}/lib64
   ${pcre:location}/lib
   ${readline:location}/lib
   ${xz-utils:location}/lib

component/scikit-image/buildout.cfg

 [buildout]
 extends =
-  ../gcc/buildout.cfg
   ../numpy/openblas.cfg
   ../cython/buildout.cfg
   ../scipy/buildout.cfg
@@ -25,8 +24,6 @@ setup-eggs =
   ${pillow-python:egg}
   networkx
 rpath =
-  ${gcc:location}/lib
-  ${gcc:location}/lib64
   ${openblas:location}/lib
 
 [scikit-image-repository]
@@ -50,6 +47,4 @@ setup-eggs =
   ${pillow-python:egg}
   networkx
 rpath =
-  ${gcc:location}/lib
-  ${gcc:location}/lib64
   ${openblas:location}/lib

component/scikit-learn/buildout.cfg

 [buildout]
 extends =
-  ../gcc/buildout.cfg
   ../cython/buildout.cfg
   ../numpy/openblas.cfg
   ../scipy/buildout.cfg
@@ -19,8 +18,6 @@ setup-eggs =
   ${numpy:egg}
   ${scipy:egg}
 rpath =
-  ${gcc:location}/lib
-  ${gcc:location}/lib64
   ${openblas:location}/lib
 
 [scikit-learn-repository]
@@ -41,6 +38,4 @@ setup-eggs =
   ${numpy:egg}
   ${scipy:egg}
 rpath =
-  ${gcc:location}/lib
-  ${gcc:location}/lib64
   ${openblas:location}/lib

component/tensorboard/buildout.cfg

@@ -26,9 +26,6 @@ egg = ${:_buildout_section_name_}
 workdir = ${tensorboard-repository:location}
 egg-name = ${:egg}-${versions:tensorflow-tensorboard}-py${python:version}.egg
 location = ${buildout:eggs-directory}/${:egg-name}
-gcc-bin = ${gcc:location}/bin
-gcc-lib = ${gcc:location}/lib
-gcc-lib64 = ${gcc:location}/lib64
 numpy-python-command = ${buildout:bin-directory}/${numpy-egg:interpreter}
 python-lib = ${python:location}/lib
 java_home_bin = ${bazel:java_home}/bin
@@ -37,19 +34,12 @@ install =
   import os, shutil
   from setuptools.archive_util import unpack_archive
   workdir = options['workdir']
-  env = {'PATH':':'.join([options['gcc-bin'],
-                          options['java_home_bin'],
+  env = {'PATH':':'.join([options['java_home_bin'],
                           options['bazel-bin'],
                           os.environ['PATH']]),
-         'COMPILER_PATH':':'.join([options['gcc-bin'],
-                                   os.environ.get('COMPILER_PATH') or '']),
-         'LIBRARY_PATH':':'.join([options['gcc-lib'],
-                                  options['gcc-lib64'],
-                                  os.environ.get('LIBRARY_PATH') or '']),
          'PYTHON_BIN_PATH':options['numpy-python-command'],
          'PYTHON_LIB_PATH':options['python-lib'],
          }
-  env['LD_LIBRARY_PATH'] = env['LIBRARY_PATH']
   bazel_command = ['bazel', 'build', '--spawn_strategy=standalone', '--verbose_failures', '--sandbox_debug', '//tensorboard/pip_package:build_pip_package']
   os.chdir(workdir)
   try:

component/tensorflow/buildout.cfg

@@ -47,9 +47,6 @@ egg = ${:_buildout_section_name_}
 workdir = ${tensorflow-repository:location}
 egg-name = ${:egg}-${versions:tensorflow}-py${python:version}-linux-x86_64.egg
 location = ${buildout:eggs-directory}/${:egg-name}
-gcc-bin = ${gcc:location}/bin
-gcc-lib = ${gcc:location}/lib
-gcc-lib64 = ${gcc:location}/lib64
 numpy-python-command = ${buildout:bin-directory}/${numpy-egg:interpreter}
 python-lib = ${python:location}/lib
 java_home_bin = ${bazel:java_home}/bin
@@ -62,15 +59,9 @@ install =
   import os, shutil
   from setuptools.archive_util import unpack_archive
   workdir = options['workdir']
-  env = {'PATH':':'.join([options['gcc-bin'],
-                          options['java_home_bin'],
+  env = {'PATH':':'.join([options['java_home_bin'],
                           options['bazel_bin'],
                           os.environ['PATH']]),
-         'COMPILER_PATH':':'.join([options['gcc-bin'],
-                                   os.environ.get('COMPILER_PATH') or '']),
-         'LIBRARY_PATH':':'.join([options['gcc-lib'],
-                                  options['gcc-lib64'],
-                                  os.environ.get('LIBRARY_PATH') or '']),
          'PYTHON_BIN_PATH':options['numpy-python-command'],
          'PYTHON_LIB_PATH':options['python-lib'],
          'CC_OPT_FLAGS':'-march=native',
@@ -85,7 +76,6 @@ install =
          'TF_NEED_MPI':'0',
          'TF_NEED_CUDA':self.buildout['cuda']['tf_need_cuda'],
          ##### FOR CUDA #####
-         'GCC_HOST_COMPILER_PATH':os.path.join(options['gcc-bin'], 'gcc'),
          'TF_CUDA_VERSION':self.buildout['cuda']['tf_cuda_version'],
          'CUDA_TOOLKIT_PATH':self.buildout['cuda']['cuda_toolkit_path'],
          'TF_CUDNN_VERSION':self.buildout['cuda']['tf_cudnn_version'],
@@ -94,8 +84,6 @@ install =
          ####################
          }
   if not os.path.exists(env['CUDA_TOOLKIT_PATH']): env['TF_NEED_CUDA'] = '0'
-  env['LD_LIBRARY_PATH'] = env['LIBRARY_PATH']
-  env['LDFLAGS'] = '-lW,-rpath='+options['gcc-lib64']
   call(['./configure'], cwd=workdir, env=env)
   bazel_command = (env['TF_NEED_CUDA'] == '1' and
     ['bazel', 'build', '-c', 'opt', '--copt', '-march=native', '--config', 'cuda', '-s', '--verbose_failures', '//tensorflow/tools/pip_package:build_pip_package']

component/tesseract/buildout.cfg

@@ -2,7 +2,6 @@
 extends =
   ../autoconf/buildout.cfg
   ../automake/buildout.cfg
-  ../gcc/buildout.cfg
   ../jbigkit/buildout.cfg
   ../leptonica/buildout.cfg
   ../libpng/buildout.cfg
@@ -33,10 +32,9 @@ configure-options =
 # its trained data, so we set its datarootdir above to a controlled location
 
 environment =
-  PATH=${pkgconfig:location}/bin:${autoconf:location}/bin:${automake:location}/bin:${gcc:location}/bin:${libtool:location}/bin:${m4:location}/bin:${patch:location}/bin:%(PATH)s
+  PATH=${pkgconfig:location}/bin:${autoconf:location}/bin:${automake:location}/bin:${libtool:location}/bin:${m4:location}/bin:${patch:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${:pkg_config_depends}
-  LD_LIBRARY_PATH=${gcc:location}/lib:${gcc:location}/lib64
-  LDFLAGS=-Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64 -L${leptonica:location}/lib -Wl,-rpath=${leptonica:location}/lib -L${jbigkit:location}/lib -Wl,-rpath=${jbigkit:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
+  LDFLAGS=-L${leptonica:location}/lib -Wl,-rpath=${leptonica:location}/lib -L${jbigkit:location}/lib -Wl,-rpath=${jbigkit:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
 
 [tesseract-traineddata]
 location = ${buildout:parts-directory}/${:_buildout_section_name_}

software/cloudooo/software-common.cfg

@@ -7,6 +7,11 @@ extends =
 parts =
   ${cloudooo-buildout:parts}
 
+[gcc]
+# For old version of glibmm.
+part = gcc-5.5
+max_version = 6
+
 [cloudooo-buildout]
 parts =
   ${stack-cloudooo-buildout:parts}

software/dream/software.cfg

@@ -13,6 +13,10 @@ parts =
   npm_install
   instance
 
+[gcc]
+# Always build GCC for Fortran (see openblas).
+max_version = 0
+
 [instance]
 recipe = slapos.recipe.template
 url = ${:_profile_base_location_}/${:filename}

software/gitlab/software.cfg

@@ -232,7 +232,6 @@ command = bash -c ". ${gowork:env.sh} && CGO_CFLAGS=-I${:git2go}/include CGO_LDF
 
 [gowork]
 golang  = ${golang1.12:location}
-gcc-bin-directory = ${golang1.12:gcc-bin-directory}
 # gitlab.com/gitlab-org/gitlab-workhorse
 # gitlab.com/gitlab-org/gitlab-workhorse/cmd/gitlab-zip-cat
 # gitlab.com/gitlab-org/gitlab-workhorse/cmd/gitlab-zip-metadata

software/grafana/software.cfg

@@ -50,7 +50,6 @@ promtail-bin = ${:bin}/promtail
 
 # use recent go
 golang  = ${golang1.12:location}
-gcc-bin-directory  = ${golang1.12:gcc-bin-directory}
 
 [gowork.goinstall]
 command = :

software/jupyter/software.cfg

@@ -12,6 +12,10 @@ parts +=
   jupyter-notebook-initialized-scripts
   instance-jupyter-notebook
 
+[gcc]
+# Always build GCC for Fortran (see openblas).
+max_version = 0
+
 [jupyter]
 python_executable = ${buildout:bin-directory}/${:interpreter}
 

software/nextcloud/software.cfg

@@ -4,6 +4,11 @@ extends =
   ../../component/redis/buildout.cfg
   ../../stack/lamp/buildout.cfg
 
+[gcc]
+# For old version of glibmm.
+part = gcc-5.5
+max_version = 6
+
 [nc-download-base]
 recipe = hexagonit.recipe.download
 ignore-existing = true

software/powerdns/software.cfg

@@ -10,6 +10,11 @@ parts =
   slapos-cookbook
   eggs
 
+[gcc]
+# For old version of PowerDNS and Ragel.
+part = gcc-5.5
+max_version = 6
+
 [eggs]
 recipe = zc.recipe.egg
 eggs =

software/wendelin/software.cfg

@@ -30,17 +30,23 @@ eggs +=
   ${ipython:egg}
   
 [generic_testrunner_init]
-initialization = 
+recipe = slapos.recipe.build
+init =
+  import struct
+  gcc = self.buildout['gcc']
+  options['initialization'] %= (
+    gcc['prefix'] + '/lib%s/libstdc++.so' % (8 * struct.calcsize("P"))
+    ) if 'part' in gcc else ''
+initialization =
   # The 4 lines below will replace the process with another one, with the proper
   # LD_PRELOAD environment variable. This is necessary because LD_PRELOAD is only
   # taken into account when the process starts. Modifying it in runtime doesn't
   # work.
-  import struct, os
-  arch = 8 * struct.calcsize("P")
-  rerun = not os.getenv('LD_PRELOAD')
-  if rerun: os.environ['LD_PRELOAD'] = '''${gcc:location}/lib%s/libstdc++.so''' % arch
-  if rerun: os.execve(os.path.realpath(__file__), sys.argv, os.environ)
-  
+  import os
+  if not os.getenv('LD_PRELOAD'):
+    os.environ['LD_PRELOAD'] = %r
+    os.execve(os.path.realpath(__file__), sys.argv, os.environ)
+
 [test_suite_runner]
 # we need to override the test suite runner to add our custom libstdc++ dynamic
 # library to the path

stack/erp5/buildout.cfg

@@ -6,7 +6,6 @@ extends =
   zope-versions.cfg
   buildout.hash.cfg
   ../../component/fonts/buildout.cfg
-  ../../component/gcc/buildout.cfg
   ../../component/git/buildout.cfg
   ../../component/graphviz/buildout.cfg
   ../../component/gzip/buildout.cfg
@@ -94,9 +93,10 @@ parts +=
 # jupyter
   jupyter-notebook-initialized-scripts
 
-# override python2.7 to add SlapOS libstdc++ in RPATH.
-[python2.7]
-extra-ldflags = -Wl,-rpath=${gcc:location}/lib -Wl,-rpath=${gcc:location}/lib64
+[gcc]
+# KumoFS is known not to build with gcc>6.
+# It may work with slightly more recent but not tested.
+part = gcc-5.5
 
 # override instance-jupyter-notebook not to render into default template.cfg
 [instance-jupyter-notebook]