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| author | Tom Tromey <tromey@adacore.com> | 2022-03-31 08:26:12 -0600 |
|---|---|---|
| committer | Tom Tromey <tromey@adacore.com> | 2022-04-14 09:28:56 -0600 |
| commit | c560a5fbae3b6e0b7c2119e6fc276941517377fa (patch) | |
| tree | e07887af60fda3b3e30d5b491501fc28e41fe24d /gdbsupport/configure | |
| parent | 11d7dd3357997616427e22969ea8a929f5db59c9 (diff) | |
| download | gdb-c560a5fbae3b6e0b7c2119e6fc276941517377fa.zip gdb-c560a5fbae3b6e0b7c2119e6fc276941517377fa.tar.gz gdb-c560a5fbae3b6e0b7c2119e6fc276941517377fa.tar.bz2 | |
Let std::thread check pass even without pthreads
Currently, the configure check for std::thread relies on pthreads
existing. However, this means that if std::thread is implemented for
a non-pthreads host, then the check will yield the wrong answer. This
happened in AdaCore internal builds. Here, we have this GCC patch:
https://gcc.gnu.org/legacy-ml/gcc-patches/2019-06/msg01840.html
... which adds mingw support to GCC's gthreads implementation, and
also to std::thread.
This configure change fixes this problem and enables threading for
gdb.
Diffstat (limited to 'gdbsupport/configure')
| -rwxr-xr-x | gdbsupport/configure | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/gdbsupport/configure b/gdbsupport/configure index 2070a39..618f487 100755 --- a/gdbsupport/configure +++ b/gdbsupport/configure @@ -8945,12 +8945,11 @@ ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ex ac_compiler_gnu=$ac_cv_cxx_compiler_gnu - if test "$threads" = "yes"; then - save_LIBS="$LIBS" - LIBS="$PTHREAD_LIBS $LIBS" - save_CXXFLAGS="$CXXFLAGS" - CXXFLAGS="$PTHREAD_CFLAGS $save_CXXFLAGS" - { $as_echo "$as_me:${as_lineno-$LINENO}: checking for std::thread" >&5 + save_LIBS="$LIBS" + LIBS="$PTHREAD_LIBS $LIBS" + save_CXXFLAGS="$CXXFLAGS" + CXXFLAGS="$PTHREAD_CFLAGS $save_CXXFLAGS" + { $as_echo "$as_me:${as_lineno-$LINENO}: checking for std::thread" >&5 $as_echo_n "checking for std::thread... " >&6; } if ${gdb_cv_cxx_std_thread+:} false; then : $as_echo_n "(cached) " >&6 @@ -8958,7 +8957,7 @@ else cat confdefs.h - <<_ACEOF >conftest.$ac_ext /* end confdefs.h. */ #include <thread> - void callback() { } + void callback() { } int main () { @@ -8977,6 +8976,7 @@ fi { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gdb_cv_cxx_std_thread" >&5 $as_echo "$gdb_cv_cxx_std_thread" >&6; } + if test "$threads" = "yes"; then # This check must be here, while LIBS includes any necessary # threading library. for ac_func in pthread_sigmask pthread_setname_np @@ -8991,10 +8991,9 @@ _ACEOF fi done - - LIBS="$save_LIBS" - CXXFLAGS="$save_CXXFLAGS" fi + LIBS="$save_LIBS" + CXXFLAGS="$save_CXXFLAGS" if test "$want_threading" = "yes"; then if test "$gdb_cv_cxx_std_thread" = "yes"; then |