gcc-plugins: drop support for GCC <= 4.7
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>
diff --git a/scripts/gcc-plugin.sh b/scripts/gcc-plugin.sh
index d3caefe..b79fd0b 100755
--- a/scripts/gcc-plugin.sh
+++ b/scripts/gcc-plugin.sh
@@ -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 @@
.test = 1
};
EOF
-)
-
-if [ $? -eq 0 ]
-then
- echo "$2"
- exit 0
-fi
-
-if [ -n "$SHOW_ERROR" ] ; then
- echo "${plugincc}" >&2
-fi
-exit 1
