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| author | H.J. Lu <hjl.tools@gmail.com> | 2017-12-18 12:24:26 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2017-12-18 12:24:38 -0800 |
| commit | 00c714df398b63934540d95ce3792596f7a94a6c (patch) | |
| tree | f96ed5735a44f5a6afff6efafe5dc86f1b93fecb /configure.ac | |
| parent | 8e1472d2c1e25e6eabc2059170731365f6d5b3d1 (diff) | |
| download | glibc-00c714df398b63934540d95ce3792596f7a94a6c.tar.gz | |
Pass -no-pie to GCC only if GCC defaults to PIE [BZ #22614]
After --enable-static-pie is added to configure, libc_cv_pie_default is
set to yes when either --enable-static-pie is used to configure glibc
or GCC defaults to PIE. We should set no-pie-ldflag to -no-pie, which
is supported on GCC 6 and later, only if GCC defaults to PIE, not when
--enable-static-pie is used to configure glibc.
Tested on x32 with --enable-static-pie using GCC 5 and without
--enable-static-pie using GCC 7.
[BZ #22614]
* Makeconfig (no-pie-ldflag): Set to -no-pie only if
$(cc-pie-default) == yes.
* config.make.in (cc-pie-default): New.
* configure.ac (libc_cv_pie_default): Renamed to ...
(libc_cv_cc_pie_default): This.
(libc_cv_pie_default): Set to $libc_cv_cc_pie_default.
* configure: Regenerated.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/configure.ac b/configure.ac index 8e4006f0a9..ca1282a6b3 100644 --- a/configure.ac +++ b/configure.ac @@ -1794,17 +1794,19 @@ fi rm -f conftest.*]) AC_SUBST(libc_cv_pic_default) -AC_CACHE_CHECK([whether -fPIE is default], libc_cv_pie_default, -[libc_cv_pie_default=yes +AC_CACHE_CHECK([whether -fPIE is default], libc_cv_cc_pie_default, +[libc_cv_cc_pie_default=yes cat > conftest.c <<EOF #if defined __PIE__ || defined __pie__ || defined PIE || defined pie # error PIE is default. #endif EOF if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then - libc_cv_pie_default=no + libc_cv_cc_pie_default=no fi rm -f conftest.*]) +libc_cv_pie_default=$libc_cv_cc_pie_default +AC_SUBST(libc_cv_cc_pie_default) AC_SUBST(libc_cv_pie_default) # Set the `multidir' variable by grabbing the variable from the compiler. |