diff options
Diffstat (limited to 'm4/fp_cc_linker_flag_try.m4')
| -rw-r--r-- | m4/fp_cc_linker_flag_try.m4 | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/m4/fp_cc_linker_flag_try.m4 b/m4/fp_cc_linker_flag_try.m4 index 69af387d5d..ff2b21d420 100644 --- a/m4/fp_cc_linker_flag_try.m4 +++ b/m4/fp_cc_linker_flag_try.m4 @@ -7,14 +7,30 @@ # $2 = the variable to set with the appropriate GHC flag if the linker is # found to be usable AC_DEFUN([FP_CC_LINKER_FLAG_TRY], [ + AC_REQUIRE([FP_GCC_SUPPORTS_NO_PIE]) AC_MSG_CHECKING([whether C compiler supports -fuse-ld=$1]) + args="" echo 'int main(void) {return 0;}' > conftest.c - if $CC -o conftest.o -fuse-ld=$1 conftest.c > /dev/null 2>&1 + if $CC -o conftest.o $args -fuse-ld=$1 conftest.c > /dev/null 2>&1 then - $2="-fuse-ld=$1" AC_MSG_RESULT([yes]) + + # ld.gold's treatment of position independent code is broken in ways + # that miscompile musl. See GHC #17508 and binutils issue #23856. + AC_MSG_CHECKING([whether $1 linker is affected by binutils issue 23856]) + if [ "$CONF_GCC_SUPPORTS_NO_PIE" = "YES" ]; then + args="$args -no-pie" + fi + echo '#include <stdio.h>' > conftest.c + echo 'int main(void) {printf("hello world\n"); return 0;}' >> conftest.c + if $CC -o conftest $args -fuse-ld=$1 conftest.c > /dev/null 2>&1 && ./conftest; then + AC_MSG_RESULT([not affected]) + $2="-fuse-ld=$1" + else + AC_MSG_RESULT([affected]) + fi else AC_MSG_RESULT([no]) fi - rm -f conftest.c conftest.o + rm -f conftest.c conftest conftest.o ]) |