Preview: gts-annobin-plugin-select.sh
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/opt/rh/gcc-toolset-14/root/lib/rpm/redhat/gts-annobin-plugin-select.sh
#!/usr/bin/sh
# This is a script to switch the symlinks in a GTS gcc's plugin
# directory so that they select either the GTS-annobin provided
# plugin or the GTS-gcc provided plugin.
# Author: Nick Clifton <nickc@redhat.com>
# Copyright (c) 2021-2022 Red Hat.
#
# This is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published
# by the Free Software Foundation; either version 2, or (at your
# option) any later version.
# It is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# Usage:
# gts-annobin-plugin-select scl_root
#
# Set this variable to non-zero to enable the generation of debugging
# messages.
debug=0
if test "x$1" = "x" ;
then
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Must provide a root directory"
fi
exit 1
else
scl_root=$1
fi
# This script is similar to the redhat-annobin-plugin-select.sh script which
# is part of the redhat-rpm-config package. That scripts decides between two
# versions of the annobin plugin for the system compiler and stores it choice
# in a symlink in the /usr/lib/rpm/redhat directory. The choice eventually
# resolves into the system gcc attempting to load either a plugin called
# annobin.so or a plugin called gcc-annobin.so.
# In a GTS environment the choice made by redhat-annobin-plugin-select.sh
# might not be appropriate (or even possible). The choice cannot be changed
# because the system compilation environment must remain instact. So instead
# the GTS versions of gcc and annobin install plugins called gts-annobin.so
# and gts-gcc-annobin.so (into the GTS gcc's plugin directory) and this script
# creates a pair of symlinks called annobin.so and gcc-annobin.so. In this
# way the decision made by redhat-annobin-plugin-select.sh is overridden
# without affecting any system files.
# We cannot be sure that this script will run inside a GTS enabled shell,
# so we have to use absolute paths.
gts_gcc=$scl_root/usr/bin/gcc
if [ ! -x $gts_gcc ]
then
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Could not find gcc. Expected: $gts_gcc"
fi
exit 0
fi
# This is where the annobin package stores the information on the version
# of gcc that built the annobin plugin.
aver=`$gts_gcc --print-file-name=plugin`/annobin-plugin-version-info
# This is where the gcc package stores its version information.
gver=`$gts_gcc --print-file-name=rpmver`
aplugin=`$gts_gcc --print-file-name=plugin`/gts-annobin.so.0.0.0
gplugin=`$gts_gcc --print-file-name=plugin`/gts-gcc-annobin.so.0.0.0
install_annobin_version=0
install_gcc_version=0
if [ -f $aplugin ]
then
if [ -f $gplugin ]
then
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Both plugins exist, checking version information"
fi
if [ -f $gver ]
then
if [ -f $aver ]
then
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Both plugin version files exist - comparing..."
fi
# Get the first line from the version info files. This is just in
# case there are extra lines in the files.
avers=`head --lines=1 $aver`
gvers=`head --lines=1 $gver`
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Annobin plugin built by gcc $avers"
echo " gts-annobin-plugin-select: GCC plugin built by gcc $gvers"
fi
# If both plugins were built by the same version of gcc then select
# the one from the annobin package (in case it is built from newer
# sources). If the plugin builder versions differ, select the gcc
# built version instead. This assumes that the gcc built version
# always matches the installed gcc, which should be true.
if [ $avers = $gvers ]
then
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Both plugins built by the same compiler - using annobin-built plugin"
fi
install_annobin_version=1
else
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Versions differ - using gcc-built plugin"
fi
install_gcc_version=1
fi
else
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Annobin version file does not exist, using gcc-built plugin"
fi
install_gcc_version=1
fi
else
if [ -f $aver ]
then
# FIXME: This is suspicious. If the installed GCC does not supports plugins
# then enabling the annobin plugin will not work.
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: GCC plugin version file does not exist, using annobin-built plugin"
fi
install_annobin_version=1
else
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Neither version file exists - playing safe and using gcc-built plugin"
echo " gts-annobin-plugin-select: Note: expected to find $aver and/or $gver"
fi
install_gcc_version=1
fi
fi
else
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Only the annobin plugin exists - using that"
fi
install_annobin_version=1
fi
else
if [ -f $gplugin ]
then
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Only the gcc plugin exists - using that"
fi
install_gcc_version=1
else
aplugin=`$gts_gcc --print-file-name=plugin`/annobin.so.0.0.0
if [ -f $aplugin ]
then
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Original annobin plugin exists - renaming"
echo " gts-annobin-plugin-select: Using renamed original annobin plugin"
fi
pushd `$gts_gcc --print-file-name=plugin` > /dev/null
mv annobin.so.0.0.0 gts-annobin.so.0.0.0
popd > /dev/null
install_annobin_version=1
else
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Neither plugin exists - playing safe and not changing anything"
echo " gts-annobin-plugin-select: Note: expected to find $aplugin and/or $gplugin"
fi
fi
fi
fi
if [ $install_annobin_version -eq 1 ]
then
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Setting symlinks for the annobin version of the plugin"
fi
pushd `$gts_gcc --print-file-name=plugin` > /dev/null
rm -f gcc-annobin.so.0.0.0 annobin.so.0.0.0 gcc-annobin.so annobin.so
ln -s gts-annobin.so.0.0.0 annobin.so
ln -s gts-annobin.so.0.0.0 gcc-annobin.so
ln -s gts-annobin.so.0.0.0 annobin.so.0.0.0
ln -s gts-annobin.so.0.0.0 gcc-annobin.so.0.0.0
popd > /dev/null
else if [ $install_gcc_version -eq 1 ]
then
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: Setting symlinks for the gcc version of the plugin"
fi
pushd `$gts_gcc --print-file-name=plugin` > /dev/null
rm -f gcc-annobin.so.0.0.0 annobin.so.0.0.0 gcc-annobin.so annobin.so
ln -s gts-gcc-annobin.so.0.0.0 annobin.so
ln -s gts-gcc-annobin.so.0.0.0 gcc-annobin.so
ln -s gts-gcc-annobin.so.0.0.0 annobin.so.0.0.0
ln -s gts-gcc-annobin.so.0.0.0 gcc-annobin.so.0.0.0
popd > /dev/null
else
if [ $debug -eq 1 ]
then
echo " gts-annobin-plugin-select: NOT CHANGING SYMLINKS"
fi
fi
fi
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