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gcc-plugins: drop support for GCC <= 4.7

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Nobody was opposed to raising minimum GCC version to 4.8 [1]
So, we will drop GCC <= 4.7 support sooner or later.

We always use C++ compiler for building plugins for GCC >= 4.8.

This commit drops the plugin support for GCC <= 4.7 a bit earlier,
which allows us to dump lots of code.

[1] https://lkml.org/lkml/2020/1/23/545

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
This commit is contained in:
Masahiro Yamada 2020-03-29 20:08:32 +09:00
parent afe956c577
commit 77342a02ff
7 changed files with 15 additions and 104 deletions
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57
scripts/gcc-plugin.sh
View file

@ -1,49 +1,14 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
set -e
srctree=$(dirname "$0")
SHOW_ERROR=
if [ "$1" = "--show-error" ] ; then
SHOW_ERROR=1
shift || true
fi
gccplugins_dir=$($3 -print-file-name=plugin)
plugincc=$($1 -E -x c++ - -o /dev/null -I"${srctree}"/gcc-plugins -I"${gccplugins_dir}"/include 2>&1 <<EOF
#include "gcc-common.h"
#if BUILDING_GCC_VERSION >= 4008 || defined(ENABLE_BUILD_WITH_CXX)
#warning $2 CXX
#else
#warning $1 CC
#endif
EOF
)
if [ $? -ne 0 ]
then
if [ -n "$SHOW_ERROR" ] ; then
echo "${plugincc}" >&2
fi
exit 1
fi
case "$plugincc" in
*"$1 CC"*)
echo "$1"
exit 0
;;
*"$2 CXX"*)
# the c++ compiler needs another test, see below
;;
*)
exit 1
;;
esac
gccplugins_dir=$($* -print-file-name=plugin)
# we need a c++ compiler that supports the designated initializer GNU extension
plugincc=$($2 -c -x c++ -std=gnu++98 - -fsyntax-only -I"${srctree}"/gcc-plugins -I"${gccplugins_dir}"/include 2>&1 <<EOF
$HOSTCC -c -x c++ -std=gnu++98 - -fsyntax-only -I $srctree/gcc-plugins -I $gccplugins_dir/include 2>/dev/null <<EOF
#include "gcc-common.h"
class test {
public:
@ -52,15 +17,3 @@ public:
.test = 1
};
EOF
)
if [ $? -eq 0 ]
then
echo "$2"
exit 0
fi
if [ -n "$SHOW_ERROR" ] ; then
echo "${plugincc}" >&2
fi
exit 1