MDEV-7305 Difficulties building cracklib_password_check

put cracklib_password_check into a separate package.
build it conditionally on Debian/Ubuntu

debian/autobake-deb.sh

@@ -15,7 +15,7 @@ set -e
 # Buildbot, running the test suite from installed .debs on a clean VM.
 export DEB_BUILD_OPTIONS="nocheck"
 
-#export MARIADB_OPTIONAL_DEBS="tokudb-engine"
+export MARIADB_OPTIONAL_DEBS=""
 
 # Find major.minor version.
 #
@@ -38,6 +38,15 @@ case "${CODENAME}" in
   *)  LIBREADLINE_DEV=libreadline-gplv2-dev ;;
 esac
 
+# add libcrack2 (>= 2.9.0) as a build dependency
+# but only where the distribution can possibly satisfy it
+if apt-cache madison cracklib2|grep 'cracklib2 *| *2\.[0-8]\.' >/dev/null 2>&1
+then
+  MAYBE_LIBCRACK=''
+  MARIADB_OPTIONAL_DEBS="${MARIADB_OPTIONAL_DEBS} cracklib-password-check-10.1"
+else
+  MAYBE_LIBCRACK='libcrack2-dev (>= 2.9.0),'
+fi
 
 # Clean up build file symlinks that are distro-specific. First remove all, then set
 # new links.
@@ -56,6 +65,7 @@ DISTROFILES="$(ls ./debian/dist/${DISTRO})"
 for distrofile in ${DISTROFILES}; do
   rm -f "./debian/${distrofile}"
   sed -e "s/\\\${LIBREADLINE_DEV}/${LIBREADLINE_DEV}/g" \
+      -e "s/\\\${MAYBE_LIBCRACK}/${MAYBE_LIBCRACK}/g"             \
     < "./debian/dist/${DISTRO}/${distrofile}" > "./debian/${distrofile}"
   chmod --reference="./debian/dist/${DISTRO}/${distrofile}" "./debian/${distrofile}"
 done;

debian/dist/Debian/control

@@ -4,7 +4,7 @@ Priority: optional
 Maintainer: MariaDB Developers <maria-developers@lists.launchpad.net>
 XSBC-Original-Maintainer: Maria Developers <maria-developers@lists.launchpad.net>
 Uploaders: MariaDB Developers <maria-developers@lists.launchpad.net>
-Build-Depends: libtool (>= 1.4.2-7), procps | hurd,  debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, cmake (>= 2.7), libaio-dev, libjemalloc-dev (>= 3.0.0)
+Build-Depends: libtool (>= 1.4.2-7), procps | hurd,  debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, cmake (>= 2.7), libaio-dev, ${MAYBE_LIBCRACK} libjemalloc-dev (>= 3.0.0)
 Standards-Version: 3.8.3
 Homepage: http://mariadb.org/
 Vcs-Browser: https://github.com/MariaDB/server/tree/10.1/
@@ -268,3 +268,10 @@ Description: Oqgraph storage engine for MariaDB
  The OQGRAPH engine is a computation engine plugin for handling hierarchies
  (trees) and graphs (friend-of-a-friend, etc) cleanly through standard SQL.
 
+Package: mariadb-cracklib-password-check-10.1
+Section: database
+Architecture: any
+Depends: mariadb-server-10.1, libcrack2 (>= 2.9.0)
+Description: CrackLib Password Validation Plugin for MariaDB
+ This password validation plugin uses cracklib to allow only
+ sufficiently secure (as defined by cracklib) user passwords in MariaDB.

debian/dist/Ubuntu/control

@@ -4,7 +4,7 @@ Priority: optional
 Maintainer: MariaDB Developers <maria-developers@lists.launchpad.net>
 XSBC-Original-Maintainer: Maria Developers <maria-developers@lists.launchpad.net>
 Uploaders: MariaDB Developers <maria-developers@lists.launchpad.net>
-Build-Depends: libtool (>= 1.4.2-7), procps | hurd,  debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, cmake (>= 2.7), libaio-dev, libjemalloc-dev (>= 3.0.0)
+Build-Depends: libtool (>= 1.4.2-7), procps | hurd,  debhelper, file (>= 3.28), libncurses5-dev (>= 5.0-6), perl (>= 5.6.0), libwrap0-dev (>= 7.6-8.3), zlib1g-dev (>= 1:1.1.3-5), ${LIBREADLINE_DEV}, libssl-dev, libpam0g-dev, psmisc, po-debconf, chrpath, automake1.9, doxygen, texlive-latex-base, ghostscript | gs-gpl, dpatch, gawk, bison, lsb-release, hardening-wrapper, cmake (>= 2.7), libaio-dev, ${MAYBE_LIBCRACK} libjemalloc-dev (>= 3.0.0)
 Standards-Version: 3.8.2
 Homepage: http://mariadb.org/
 Vcs-Browser: http://bazaar.launchpad.net/~maria-captains/maria/10.1/files
@@ -262,3 +262,10 @@ Description: Oqgraph storage engine for MariaDB
  The OQGRAPH engine is a computation engine plugin for handling hierarchies
  (trees) and graphs (friend-of-a-friend, etc) cleanly through standard SQL.
 
+Package: mariadb-cracklib-password-check-10.1
+Section: database
+Architecture: any
+Depends: mariadb-server-10.1, libcrack2 (>= 2.9.0)
+Description: CrackLib Password Validation Plugin for MariaDB
+ This password validation plugin uses cracklib to allow only
+ sufficiently secure (as defined by cracklib) user passwords in MariaDB.

debian/mariadb-cracklib-password-check-10.1.files

+usr/lib/mysql/plugin/cracklib_password_check.so

plugin/cracklib_password_check/CMakeLists.txt

 INCLUDE (CheckIncludeFiles)
 INCLUDE (CheckLibraryExists)
 
-CHECK_INCLUDE_FILES (crack.h HAVE_CRACK_H)
 CHECK_LIBRARY_EXISTS(crack FascistCheckUser "" HAVE_LIBCRACK)
 
+SET(CMAKE_REQUIRED_DEFINITIONS -Dsize_t=int) # debian hack, debian bug.
+CHECK_INCLUDE_FILES (crack.h HAVE_CRACK_H)
+
 IF (HAVE_ALLOCA_H AND HAVE_CRACK_H AND HAVE_LIBCRACK AND HAVE_MEMCPY)
   MYSQL_ADD_PLUGIN(cracklib_password_check cracklib_password_check.c
-                   LINK_LIBRARIES crack MODULE_ONLY)
+                   LINK_LIBRARIES crack MODULE_ONLY
+                   COMPONENT cracklib-password-check)
 ENDIF()