diff options
| author | Ben Gamari <bgamari.foss@gmail.com> | 2016-11-14 14:13:30 -0500 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2016-11-14 14:13:31 -0500 |
| commit | 011af2bf448c28db68a55293abaa5b294f170e37 (patch) | |
| tree | 5c458ba3bcdab9bd57ca43f453c341e19a642a41 /aclocal.m4 | |
| parent | cb168900f88564e7d2e084c5ccd131d4109be795 (diff) | |
| download | haskell-011af2bf448c28db68a55293abaa5b294f170e37.tar.gz | |
configure: Verify that GCC recognizes -no-pie flag
It seems like GCC versions prior to 4.8 exit with code 0 when faced with
an unrecognized flag. Silly compilers.
Test Plan: Validate
Reviewers: hvr, austin, ggreif
Reviewed By: ggreif
Subscribers: thomie, erikd
Differential Revision: https://phabricator.haskell.org/D2707
GHC Trac Issues: #12759
Diffstat (limited to 'aclocal.m4')
| -rw-r--r-- | aclocal.m4 | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/aclocal.m4 b/aclocal.m4 index aea85f4908..5d395709a0 100644 --- a/aclocal.m4 +++ b/aclocal.m4 @@ -1333,7 +1333,8 @@ AC_DEFUN([FP_GCC_SUPPORTS_NO_PIE], AC_REQUIRE([AC_PROG_CC]) AC_MSG_CHECKING([whether GCC supports -no-pie]) echo 'int main() { return 0; }' > conftest.c - if ${CC-cc} -o conftest -no-pie conftest.c > /dev/null 2>&1; then + # Some GCC versions only warn when passed an unrecognized flag. + if $CC -no-pie -x c /dev/null -dM -E > conftest.txt 2>&1 && ! grep -i unrecognized conftest.txt > /dev/null 2>&1; then CONF_GCC_SUPPORTS_NO_PIE=YES AC_MSG_RESULT([yes]) else |