diff options
| author | Florian Weimer <fweimer@redhat.com> | 2019-09-06 12:27:36 +0200 |
|---|---|---|
| committer | Florian Weimer <fw@gcc.gnu.org> | 2019-09-06 12:27:36 +0200 |
| commit | 3c086f8decdc190602fb66cfec8f3cff16328142 (patch) | |
| tree | 1902238a65deeaf90dfe4c439e44384b48b39d0e /config/futex.m4 | |
| parent | 7d99a5b62c2672eff965fec12edac0a080d77257 (diff) | |
| download | gcc-3c086f8decdc190602fb66cfec8f3cff16328142.zip gcc-3c086f8decdc190602fb66cfec8f3cff16328142.tar.gz gcc-3c086f8decdc190602fb66cfec8f3cff16328142.tar.bz2 | |
Fix GCC_LINUX_FUTEX to work with C99 compilers
Without this change, libstdc++ is built without futex symbols if GCC
rejects implicit function declarations by default.
From-SVN: r275454
Diffstat (limited to 'config/futex.m4')
| -rw-r--r-- | config/futex.m4 | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/config/futex.m4 b/config/futex.m4 index e95144d..1b43829 100644 --- a/config/futex.m4 +++ b/config/futex.m4 @@ -22,6 +22,7 @@ case "$target" in AC_LINK_IFELSE( [AC_LANG_PROGRAM( [#include <sys/syscall.h> + #include <unistd.h> int lk;], [syscall (SYS_gettid); syscall (SYS_futex, &lk, 0, 0, 0);])], [save_LIBS="$LIBS" @@ -48,6 +49,7 @@ If so, please configure with --disable-linux-futex]) AC_LINK_IFELSE( [AC_LANG_PROGRAM( [#include <sys/syscall.h> + #include <unistd.h> int lk;], [syscall (SYS_gettid); syscall (SYS_futex, &lk, 0, 0, 0);])],[], [AC_MSG_ERROR([SYS_gettid and SYS_futex required for --enable-linux-futex])]) |