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8371626: [linux] use icf=all for linking libraries

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Reviewed-by: goetz, erikj
This commit is contained in:
Matthias Baesken 2025-11-26 12:49:42 +00:00
parent ac046628ed
commit 4ae2f31f3d
2 changed files with 8 additions and 0 deletions
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7
make/autoconf/flags-ldflags.m4
View File

@ -50,7 +50,14 @@ AC_DEFUN([FLAGS_SETUP_LDFLAGS_HELPER],
# add -z,relro (mark relocations read only) for all libs
# add -z,now ("full relro" - more of the Global Offset Table GOT is marked read only)
# add --no-as-needed to disable default --as-needed link flag on some GCC toolchains
# add --icf=all (Identical Code Folding — merges identical functions)
BASIC_LDFLAGS="-Wl,-z,defs -Wl,-z,relro -Wl,-z,now -Wl,--no-as-needed -Wl,--exclude-libs,ALL"
if test "x$LINKER_TYPE" = "xgold"; then
if test x$DEBUG_LEVEL = xrelease; then
BASIC_LDFLAGS="$BASIC_LDFLAGS -Wl,--icf=all"
fi
fi
# Linux : remove unused code+data in link step
if test "x$ENABLE_LINKTIME_GC" = xtrue; then
if test "x$OPENJDK_TARGET_CPU" = xs390x; then

1
make/autoconf/toolchain.m4
View File

@ -516,6 +516,7 @@ AC_DEFUN([TOOLCHAIN_EXTRACT_LD_VERSION],
if [ [[ "$LINKER_VERSION_STRING" == *gold* ]] ]; then
[ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
$SED -e 's/.* \([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*) .*/\1/'` ]
LINKER_TYPE=gold
else
[ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
$SED -e 's/.* \([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*/\1/'` ]