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| author | H.J. Lu <hjl.tools@gmail.com> | 2015-06-25 02:37:04 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2015-06-25 02:49:53 -0700 |
| commit | cc08749b2d1c68284b25b157fbbe1ff219495cae (patch) | |
| tree | 0b0f104c2866770c1983e521184869f3829b40f6 /configure | |
| parent | 45a8f0e6629d7772b9fa1aef0389bc51a094424d (diff) | |
| download | glibc-cc08749b2d1c68284b25b157fbbe1ff219495cae.tar.gz glibc-cc08749b2d1c68284b25b157fbbe1ff219495cae.tar.xz glibc-cc08749b2d1c68284b25b157fbbe1ff219495cae.zip | |
Support compilers defaulting to PIE
To support building glibc with GCC 6 configured with --enable-default-pie, which generates PIE by default, we need to build programs as PIE. But elf/tst-dlopen-aout must not be built as PIE since it tests dlopen on ET_EXEC file and PIE is ET_DYN. [BZ #17841] * Makeconfig (no-pie-ldflag): New. (+link): Set to $(+link-pie) if default to PIE. (+link-tests): Set to $(+link-pie-tests) if default to PIE. * config.make.in (build-pie-default): New. * configure.ac (libc_cv_pie_default): New. Set to yes if -fPIE is default. AC_SUBST. * configure: Regenerated. * elf/Makefile (LDFLAGS-tst-dlopen-aout): New.
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/configure b/configure index 1e4138b524..45cc7cba2b 100755 --- a/configure +++ b/configure @@ -596,6 +596,7 @@ mach_interface_list DEFINES static_nss profile +libc_cv_pie_default libc_cv_pic_default shared static @@ -7317,6 +7318,26 @@ fi $as_echo "$libc_cv_pic_default" >&6; } +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether -fPIE is default" >&5 +$as_echo_n "checking whether -fPIE is default... " >&6; } +if ${libc_cv_pie_default+:} false; then : + $as_echo_n "(cached) " >&6 +else + libc_cv_pie_default=yes +cat > conftest.c <<EOF +#if defined __PIE__ || defined __pie__ || defined PIE || defined pie +# error PIE is default. +#endif +EOF +if eval "${CC-cc} -S conftest.c 2>&5 1>&5"; then + libc_cv_pie_default=no +fi +rm -f conftest.* +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_pie_default" >&5 +$as_echo "$libc_cv_pie_default" >&6; } + + |