diff options
| author | Roland McGrath <roland@hack.frob.com> | 2012-05-14 15:42:52 -0700 |
|---|---|---|
| committer | Roland McGrath <roland@hack.frob.com> | 2012-05-16 16:20:59 -0700 |
| commit | 61653dfb81b776bb72ce4304175b861d77c357a8 (patch) | |
| tree | 588d62fd799fae6b3aef3958788ef72d7f71bd37 /configure.in | |
| parent | 90c885c87bdb3380d430d3f72a4a5cabf2835167 (diff) | |
BZ#10375: Configure magic to use -U_FORTIFY_SOURCE if needed.
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/configure.in b/configure.in index ce4b7ad02b..0916e9ec5c 100644 --- a/configure.in +++ b/configure.in @@ -2036,6 +2036,22 @@ AC_CHECK_SIZEOF(long double, 0) sizeof_long_double=$ac_cv_sizeof_long_double AC_SUBST(sizeof_long_double) +CPPUNDEFS= +dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE. +dnl Since we are building the implementations of the fortified functions here, +dnl having the macro defined interacts very badly. +AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source, +[AC_TRY_COMPILE([], [ +#ifdef _FORTIFY_SOURCE +# error bogon +#endif], + [libc_cv_predef_fortify_source=no], + [libc_cv_predef_fortify_source=yes])]) +if test $libc_cv_predef_fortify_source = yes; then + CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE" +fi +AC_SUBST(CPPUNDEFS) + ### End of automated tests. ### Now run sysdeps configure fragments. |