diff --git a/redhat-annobin-plugin-select.sh b/redhat-annobin-plugin-select.sh new file mode 100644 index 0000000..6b49347 --- /dev/null +++ b/redhat-annobin-plugin-select.sh @@ -0,0 +1,198 @@ +#!/usr/bin/sh +# This is a script to select which GCC spec file fragment +# should be the destination of the redhat-annobin-cc1 symlink. + +# Author: Nick Clifton +# Copyright (c) 2021 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: +# redhat-annobin-plugin-select [script-dir] +# +# If script-dir is not provided then /usr/lib/rpm/redhat is used +# as the location where all of the annobin plugin selection files +# can be found. + +if test "x$1" = "x" ; +then + rrcdir=/usr/lib/rpm/redhat +else + rrcdir=$1 +fi + +# Set this variable to non-zero to enable the generation of debugging +# messages. +debug=1 + +# Decide which version of the annobin plugin for gcc should be used. +# There are two possible versions, one created by the annobin package and one +# created by the gcc package. The logic selects the gcc version unless both +# have been built by the same version of the compiler. In that case the +# annobin version is selected instead. +# +# The point of all this is that the annobin plugin is very sensitive to +# mismatches with the version of gcc that built it. If the plugin is built +# by version A of gcc, but then run on version B of gcc, it is possible for +# the plugin to misbehave, which then causes problems if gating tests examine +# the plugin's output. (This has happened more than once in RHEL...). +# +# So the plugin is built both by gcc and by the annobin package. This means +# that whenever gcc is updated a fresh plugin is built, and the logic below +# will select that version. But in order to allow annobin development to +# proceed independtently of gcc, the annobin package can also update its +# version of the plugin, and the logic will select this new version. + +# This is where the annobin package stores the information on the version +# of gcc that built the annobin plugin. +aver=`gcc --print-file-name=plugin`/annobin-plugin-version-info + +# This is where the gcc package stores its version information. +gver=`gcc --print-file-name=rpmver` + +aplugin=`gcc --print-file-name=plugin`/annobin.so.0.0.0 +gplugin=`gcc --print-file-name=plugin`/gcc-annobin.so.0.0.0 + +# This is the file that needs to be updated when either of those version +# files changes. +rac1=redhat-annobin-cc1 + +# This is the GCC spec file fragment that selects the gcc-built version of +# the annobin plugin +select_gcc=redhat-annobin-select-gcc-built-plugin + +# This is the GCC spec file fragment that selects the annobin-built version +# of the annobin plugin +select_annobin=redhat-annobin-select-annobin-built-plugin + +install_annobin_version=0 +install_gcc_version=0 + +if [ -f $aplugin ] +then + if [ -f $gplugin ] + then + if [ $debug -eq 1 ] + then + echo " redhat-rpm-config: Both plugins exist, checking version information" + fi + + if [ -f $gver ] + then + if [ -f $aver ] + then + if [ $debug -eq 1 ] + then + echo " redhat-rpm-config: Both plugin version files exist - comparing..." + fi + + # Get the first line from the version info files. This is just in + # vase there are extra lines in the files. + avers=`head --lines=1 $aver` + gvers=`head --lines=1 $gver` + + if [ $debug -eq 1 ] + then + echo " redhat-rpm-config: Annobin plugin built by gcc $avers" + echo " redhat-rpm-config: 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 " redhat-rpm-config: Both plugins built by the same compiler - using annobin-built plugin" + fi + install_annobin_version=1 + else + if [ $debug -eq 1 ] + then + echo " redhat-rpm-config: Versions differ - using gcc-built plugin" + fi + install_gcc_version=1 + fi + else + if [ $debug -eq 1 ] + then + echo " redhat-rpm-config: 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 " redhat-rpm-config: GCC plugin version file does not exist, using annobin-built plugin" + fi + install_annobin_version=1 + else + if [ $debug -eq 1 ] + then + echo " redhat-rpm-config: Neither version file exists - not changing $rac1" + fi + fi + fi + else + if [ $debug -eq 1 ] + then + echo " redhat-rpm-config: Only the annobin plugin exists - using that" + fi + install_annobin_version=1 + fi +else + if [ -f $gplugin ] + then + if [ $debug -eq 1 ] + then + echo " redhat-rpm-config: Only the gcc plugin exists - using that" + fi + install_gcc_version=1 + else + if [ $debug -eq 1 ] + then + echo " redhat-rpm-config: Neither plugin exists - doing nothing" + echo " redhat-rpm-config: Expected $aplugin and/or $gplugin" + fi + return 0 + fi +fi + +if [ $install_annobin_version -eq 1 ] +then + if [ $debug -eq 1 ] + then + echo " redhat-rpm-config: Installing annobin version of $rac1" + fi + pushd $rrcdir > /dev/null + rm -f $rac1 + ln -s $select_annobin "$rac1" + popd > /dev/null + +else if [ $install_gcc_version -eq 1 ] + then + if [ $debug -eq 1 ] + then + echo " redhat-rpm-config: Installing gcc version of $rac1" + fi + pushd $rrcdir > /dev/null + rm -f $rac1 + ln -s $select_gcc $rac1 + popd > /dev/null + fi +fi diff --git a/redhat-annobin-select-annobin-built-plugin b/redhat-annobin-select-annobin-built-plugin new file mode 100644 index 0000000..edb8245 --- /dev/null +++ b/redhat-annobin-select-annobin-built-plugin @@ -0,0 +1,2 @@ +*cc1_options: ++ %{!-fno-use-annobin:%{!iplugindir*:%:find-plugindir()} -fplugin=annobin} diff --git a/redhat-annobin-select-gcc-built-plugin b/redhat-annobin-select-gcc-built-plugin new file mode 100644 index 0000000..af5106b --- /dev/null +++ b/redhat-annobin-select-gcc-built-plugin @@ -0,0 +1,2 @@ +*cc1_options: ++ %{!-fno-use-annobin:%{!iplugindir*:%:find-plugindir()} -fplugin=gcc-annobin}