CentOS Sources
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#!/usr/bin/sh |
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# This is a script to switch the symlinks in a GTS gcc's plugin |
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# directory so that they select either the GTS-annobin provided |
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# plugin or the GTS-gcc provided plugin. |
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|
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# Author: Nick Clifton <nickc@redhat.com> |
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# Copyright (c) 2021-2022 Red Hat. |
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# |
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# This is free software; you can redistribute it and/or modify it |
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# under the terms of the GNU General Public License as published |
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# by the Free Software Foundation; either version 2, or (at your |
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# option) any later version. |
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|
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# It is distributed in the hope that it will be useful, but |
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# WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# Usage: |
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# gts-annobin-plugin-select scl_root |
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# |
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# Set this variable to non-zero to enable the generation of debugging |
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# messages. |
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debug=0 |
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if test "x$1" = "x" ; |
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then |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Must provide a root directory" |
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fi |
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exit 1 |
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else |
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scl_root=$1 |
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fi |
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# This script is similar to the redhat-annobin-plugin-select.sh script which |
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# is part of the redhat-rpm-config package. That scripts decides between two |
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# versions of the annobin plugin for the system compiler and stores it choice |
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# in a symlink in the /usr/lib/rpm/redhat directory. The choice eventually |
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# resolves into the system gcc attempting to load either a plugin called |
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# annobin.so or a plugin called gcc-annobin.so. |
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|
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# In a GTS environment the choice made by redhat-annobin-plugin-select.sh |
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# might not be appropriate (or even possible). The choice cannot be changed |
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# because the system compilation environment must remain instact. So instead |
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# the GTS versions of gcc and annobin install plugins called gts-annobin.so |
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# and gts-gcc-annobin.so (into the GTS gcc's plugin directory) and this script |
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# creates a pair of symlinks called annobin.so and gcc-annobin.so. In this |
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# way the decision made by redhat-annobin-plugin-select.sh is overridden |
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# without affecting any system files. |
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# We cannot be sure that this script will run inside a GTS enabled shell, |
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# so we have to use absolute paths. |
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gts_gcc=$scl_root/usr/bin/gcc |
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if [ ! -x $gts_gcc ] |
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then |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Could not find gcc. Expected: $gts_gcc" |
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fi |
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exit 0 |
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fi |
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|
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# This is where the annobin package stores the information on the version |
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# of gcc that built the annobin plugin. |
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aver=`$gts_gcc --print-file-name=plugin`/annobin-plugin-version-info |
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# This is where the gcc package stores its version information. |
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gver=`$gts_gcc --print-file-name=rpmver` |
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aplugin=`$gts_gcc --print-file-name=plugin`/gts-annobin.so.0.0.0 |
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gplugin=`$gts_gcc --print-file-name=plugin`/gts-gcc-annobin.so.0.0.0 |
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install_annobin_version=0 |
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install_gcc_version=0 |
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if [ -f $aplugin ] |
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then |
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if [ -f $gplugin ] |
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then |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Both plugins exist, checking version information" |
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fi |
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|
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if [ -f $gver ] |
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then |
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if [ -f $aver ] |
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then |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Both plugin version files exist - comparing..." |
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fi |
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|
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# Get the first line from the version info files. This is just in |
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# case there are extra lines in the files. |
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avers=`head --lines=1 $aver` |
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gvers=`head --lines=1 $gver` |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Annobin plugin built by gcc $avers" |
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echo " gts-annobin-plugin-select: GCC plugin built by gcc $gvers" |
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fi |
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# If both plugins were built by the same version of gcc then select |
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# the one from the annobin package (in case it is built from newer |
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# sources). If the plugin builder versions differ, select the gcc |
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# built version instead. This assumes that the gcc built version |
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# always matches the installed gcc, which should be true. |
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if [ $avers = $gvers ] |
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then |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Both plugins built by the same compiler - using annobin-built plugin" |
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fi |
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install_annobin_version=1 |
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else |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Versions differ - using gcc-built plugin" |
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fi |
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install_gcc_version=1 |
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fi |
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else |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Annobin version file does not exist, using gcc-built plugin" |
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fi |
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install_gcc_version=1 |
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fi |
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else |
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if [ -f $aver ] |
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then |
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# FIXME: This is suspicious. If the installed GCC does not supports plugins |
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# then enabling the annobin plugin will not work. |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: GCC plugin version file does not exist, using annobin-built plugin" |
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fi |
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install_annobin_version=1 |
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else |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Neither version file exists - playing safe and using gcc-built plugin" |
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echo " gts-annobin-plugin-select: Note: expected to find $aver and/or $gver" |
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fi |
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install_gcc_version=1 |
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fi |
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fi |
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else |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Only the annobin plugin exists - using that" |
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fi |
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install_annobin_version=1 |
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fi |
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else |
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if [ -f $gplugin ] |
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then |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Only the gcc plugin exists - using that" |
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fi |
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install_gcc_version=1 |
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else |
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aplugin=`$gts_gcc --print-file-name=plugin`/annobin.so.0.0.0 |
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if [ -f $aplugin ] |
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then |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Original annobin plugin exists - renaming" |
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echo " gts-annobin-plugin-select: Using renamed original annobin plugin" |
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fi |
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pushd `$gts_gcc --print-file-name=plugin` > /dev/null |
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mv annobin.so.0.0.0 gts-annobin.so.0.0.0 |
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popd > /dev/null |
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install_annobin_version=1 |
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else |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Neither plugin exists - playing safe and not changing anything" |
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echo " gts-annobin-plugin-select: Note: expected to find $aplugin and/or $gplugin" |
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fi |
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fi |
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fi |
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fi |
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if [ $install_annobin_version -eq 1 ] |
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then |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Setting symlinks for the annobin version of the plugin" |
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fi |
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pushd `$gts_gcc --print-file-name=plugin` > /dev/null |
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rm -f gcc-annobin.so.0.0.0 annobin.so.0.0.0 gcc-annobin.so annobin.so |
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ln -s gts-annobin.so.0.0.0 annobin.so |
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ln -s gts-annobin.so.0.0.0 gcc-annobin.so |
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ln -s gts-annobin.so.0.0.0 annobin.so.0.0.0 |
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ln -s gts-annobin.so.0.0.0 gcc-annobin.so.0.0.0 |
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popd > /dev/null |
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else if [ $install_gcc_version -eq 1 ] |
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then |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: Setting symlinks for the gcc version of the plugin" |
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fi |
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pushd `$gts_gcc --print-file-name=plugin` > /dev/null |
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rm -f gcc-annobin.so.0.0.0 annobin.so.0.0.0 gcc-annobin.so annobin.so |
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ln -s gts-gcc-annobin.so.0.0.0 annobin.so |
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ln -s gts-gcc-annobin.so.0.0.0 gcc-annobin.so |
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ln -s gts-gcc-annobin.so.0.0.0 annobin.so.0.0.0 |
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ln -s gts-gcc-annobin.so.0.0.0 gcc-annobin.so.0.0.0 |
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popd > /dev/null |
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else |
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if [ $debug -eq 1 ] |
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then |
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echo " gts-annobin-plugin-select: NOT CHANGING SYMLINKS" |
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fi |
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fi |
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fi |
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