component/tesseract: use SlapOS gcc. also cleanup.

component/tesseract/buildout.cfg

 [buildout]
-
 extends =
-  ../pkgconfig/buildout.cfg
   ../autoconf/buildout.cfg
   ../automake/buildout.cfg
+  ../gcc/buildout.cfg
   ../jbigkit/buildout.cfg
   ../leptonica/buildout.cfg
   ../libpng/buildout.cfg
   ../libtool/buildout.cfg
   ../patch/buildout.cfg
-  ../webp/buildout.cfg
+  ../pkgconfig/buildout.cfg
 
 parts =
   tesseract
@@ -23,10 +22,7 @@ url = https://github.com/tesseract-ocr/tesseract/archive/6b250b58121a9858d3e3019
 md5sum = fdc38148ad8eb1bd0485a217503dd6d5
 pkg_config_depends = ${leptonica:location}/lib/pkgconfig:${fontconfig:location}/lib/pkgconfig:${fontconfig:pkg_config_depends}:${lcms2:location}/lib/pkgconfig:${xz-utils:location}/lib/pkgconfig
 pre-configure =
-  aclocal -I${pkgconfig:location}/share/aclocal -I${libtool:location}/share/aclocal
-  ./autogen.sh
-  autoreconf -ivf
-  autoconf -Wno-portability
+  autoreconf -ivf -I${pkgconfig:location}/share/aclocal -I${libtool:location}/share/aclocal -Wno-portability
 
 configure-options =
   --disable-static
@@ -34,19 +30,11 @@ configure-options =
 # XXX: tesseract seems not easily configurable at runtime about where to find
 # its trained data, so we set its datarootdir above to a controlled location
 
-# tesseract has a non-standard way of testing for leptonica, hence the
-# LIBLEPT_HEADERSDIR entry below:
 environment =
-  PATH=${pkgconfig:location}/bin:${autoconf:location}/bin:${automake:location}/bin:${libtool:location}/bin:${m4:location}/bin:${patch:location}/bin:%(PATH)s
+  PATH=${pkgconfig:location}/bin:${autoconf:location}/bin:${automake:location}/bin:${gcc:location}/bin:${libtool:location}/bin:${m4:location}/bin:${patch:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${:pkg_config_depends}
-  ACLOCAL_ARGS=-I${libtool:location}/share/aclocal
-  ACLOCAL_PATH=${pkgconfig:location}/share/aclocal:${libtool:location}/share/aclocal
-  LIBLEPT_HEADERSDIR=${leptonica:location}/include
-  CPPFLAGS=-I${leptonica:location}/include
-  LDFLAGS =-L${leptonica:location}/lib -Wl,-rpath=${leptonica:location}/lib -L${jbigkit:location}/lib -Wl,-rpath=${jbigkit:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
-
-make-options =
-  LIBTOOL=${libtool:location}/bin/libtool
+  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
 
 [tesseract-traineddata]
 location = ${buildout:parts-directory}/${:_buildout_section_name_}