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| 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 | |
| parent | 7d99a5b62c2672eff965fec12edac0a080d77257 (diff) | |
| download | gcc-3c086f8decdc190602fb66cfec8f3cff16328142.tar.gz | |
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')
| -rw-r--r-- | config/ChangeLog | 5 | ||||
| -rw-r--r-- | config/futex.m4 | 2 |
2 files changed, 7 insertions, 0 deletions
diff --git a/config/ChangeLog b/config/ChangeLog index 5a06cdeea81..2e7b8c24256 100644 --- a/config/ChangeLog +++ b/config/ChangeLog @@ -1,3 +1,8 @@ +2019-09-06 Florian Weimer <fweimer@redhat.com> + + * futex.m4 (GCC_LINUX_FUTEX): Include <unistd.h> for the syscall + function. + 2019-07-08 Richard Sandiford <richard.sandiford@arm.com> * bootstrap-Og.mk: New file. diff --git a/config/futex.m4 b/config/futex.m4 index e95144dd16a..1b438295162 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])]) |