libstdc++: Check for TLS support on mingw cross-compilers
Native mingw builds enable TLS, but crosses don't because we don't use GCC_CHECK_TLS in the cross-compiler config. libstdc++-v3/ChangeLog: * crossconfig.m4: Check for TLS support on mingw. * configure: Regenerate.
This commit is contained in:
Hugo Beauzée-Luyssen
Jonathan Wakely
parent
243e0a5b19
commit
cc1e28878a
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@ -60242,6 +60242,214 @@ _ACEOF
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fi
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done
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# Check whether --enable-tls was given.
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if test "${enable_tls+set}" = set; then :
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enableval=$enable_tls;
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case "$enableval" in
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yes|no) ;;
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*) as_fn_error $? "Argument to enable/disable tls must be yes or no" "$LINENO" 5 ;;
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esac
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else
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enable_tls=yes
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the target supports thread-local storage" >&5
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$as_echo_n "checking whether the target supports thread-local storage... " >&6; }
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if ${gcc_cv_have_tls+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if test "$cross_compiling" = yes; then :
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if test x$gcc_no_link = xyes; then
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as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
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fi
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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__thread int a; int b; int main() { return a = b; }
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_ACEOF
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if ac_fn_c_try_link "$LINENO"; then :
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chktls_save_LDFLAGS="$LDFLAGS"
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case $host in
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*-*-linux* | -*-uclinuxfdpic*)
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LDFLAGS="-shared -Wl,--no-undefined $LDFLAGS"
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;;
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esac
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chktls_save_CFLAGS="$CFLAGS"
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CFLAGS="-fPIC $CFLAGS"
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if test x$gcc_no_link = xyes; then
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as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
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fi
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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int f() { return 0; }
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_ACEOF
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if ac_fn_c_try_link "$LINENO"; then :
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if test x$gcc_no_link = xyes; then
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as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
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fi
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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__thread int a; int b; int f() { return a = b; }
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_ACEOF
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if ac_fn_c_try_link "$LINENO"; then :
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gcc_cv_have_tls=yes
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else
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gcc_cv_have_tls=no
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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else
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gcc_cv_have_tls=yes
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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CFLAGS="$chktls_save_CFLAGS"
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LDFLAGS="$chktls_save_LDFLAGS"
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else
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gcc_cv_have_tls=no
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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__thread int a; int b; int main() { return a = b; }
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_ACEOF
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if ac_fn_c_try_run "$LINENO"; then :
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chktls_save_LDFLAGS="$LDFLAGS"
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LDFLAGS="-static $LDFLAGS"
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if test x$gcc_no_link = xyes; then
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as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
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fi
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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int main() { return 0; }
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_ACEOF
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if ac_fn_c_try_link "$LINENO"; then :
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if test "$cross_compiling" = yes; then :
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{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
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$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
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as_fn_error $? "cannot run test program while cross compiling
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See \`config.log' for more details" "$LINENO" 5; }
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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__thread int a; int b; int main() { return a = b; }
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_ACEOF
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if ac_fn_c_try_run "$LINENO"; then :
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gcc_cv_have_tls=yes
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else
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gcc_cv_have_tls=no
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fi
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rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
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conftest.$ac_objext conftest.beam conftest.$ac_ext
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fi
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else
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gcc_cv_have_tls=yes
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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LDFLAGS="$chktls_save_LDFLAGS"
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if test $gcc_cv_have_tls = yes; then
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chktls_save_CFLAGS="$CFLAGS"
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thread_CFLAGS=failed
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for flag in '' '-pthread' '-lpthread'; do
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CFLAGS="$flag $chktls_save_CFLAGS"
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if test x$gcc_no_link = xyes; then
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as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
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fi
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <pthread.h>
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void *g(void *d) { return NULL; }
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int
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main ()
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{
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pthread_t t; pthread_create(&t,NULL,g,NULL);
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_link "$LINENO"; then :
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thread_CFLAGS="$flag"
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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if test "X$thread_CFLAGS" != Xfailed; then
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break
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fi
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done
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CFLAGS="$chktls_save_CFLAGS"
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if test "X$thread_CFLAGS" != Xfailed; then
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CFLAGS="$thread_CFLAGS $chktls_save_CFLAGS"
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if test "$cross_compiling" = yes; then :
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{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
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$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
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as_fn_error $? "cannot run test program while cross compiling
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See \`config.log' for more details" "$LINENO" 5; }
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <pthread.h>
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__thread int a;
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static int *volatile a_in_other_thread;
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static void *
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thread_func (void *arg)
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{
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a_in_other_thread = &a;
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return (void *)0;
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}
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int
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main ()
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{
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pthread_t thread;
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void *thread_retval;
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int *volatile a_in_main_thread;
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a_in_main_thread = &a;
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if (pthread_create (&thread, (pthread_attr_t *)0,
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thread_func, (void *)0))
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return 0;
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if (pthread_join (thread, &thread_retval))
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return 0;
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return (a_in_other_thread == a_in_main_thread);
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;
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_run "$LINENO"; then :
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gcc_cv_have_tls=yes
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else
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gcc_cv_have_tls=no
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fi
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rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
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conftest.$ac_objext conftest.beam conftest.$ac_ext
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fi
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CFLAGS="$chktls_save_CFLAGS"
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fi
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fi
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else
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gcc_cv_have_tls=no
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fi
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rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
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conftest.$ac_objext conftest.beam conftest.$ac_ext
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_have_tls" >&5
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$as_echo "$gcc_cv_have_tls" >&6; }
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if test "$enable_tls $gcc_cv_have_tls" = "yes yes"; then
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$as_echo "#define HAVE_TLS 1" >>confdefs.h
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fi
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;;
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*-netbsd* | *-openbsd*)
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SECTION_FLAGS='-ffunction-sections -fdata-sections'
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@ -204,6 +204,7 @@ case "${host}" in
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GLIBCXX_CHECK_STDLIB_SUPPORT
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AC_CHECK_FUNCS(aligned_alloc posix_memalign memalign _aligned_malloc)
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AC_CHECK_FUNCS(_wfopen)
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GCC_CHECK_TLS
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;;
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*-netbsd* | *-openbsd*)
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SECTION_FLAGS='-ffunction-sections -fdata-sections'
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