From cc1e28878a228b6c4a0872e56d97ac88971b7725 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Hugo=20Beauz=C3=A9e-Luyssen?= Date: Tue, 14 Sep 2021 16:41:37 +0100 Subject: [PATCH] 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. --- libstdc++-v3/configure | 208 ++++++++++++++++++++++++++++++++++++++++++++ libstdc++-v3/crossconfig.m4 | 1 2 files changed, 209 insertions(+) --- a/libstdc++-v3/configure +++ b/libstdc++-v3/configure @@ -60390,6 +60390,214 @@ fi done + + + # Check whether --enable-tls was given. +if test "${enable_tls+set}" = set; then : + enableval=$enable_tls; + case "$enableval" in + yes|no) ;; + *) as_fn_error $? "Argument to enable/disable tls must be yes or no" "$LINENO" 5 ;; + esac + +else + enable_tls=yes +fi + + + { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the target supports thread-local storage" >&5 +$as_echo_n "checking whether the target supports thread-local storage... " >&6; } +if ${gcc_cv_have_tls+:} false; then : + $as_echo_n "(cached) " >&6 +else + + if test "$cross_compiling" = yes; then : + if test x$gcc_no_link = xyes; then + as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5 +fi +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +__thread int a; int b; int main() { return a = b; } +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + chktls_save_LDFLAGS="$LDFLAGS" + case $host in + *-*-linux* | -*-uclinuxfdpic*) + LDFLAGS="-shared -Wl,--no-undefined $LDFLAGS" + ;; + esac + chktls_save_CFLAGS="$CFLAGS" + CFLAGS="-fPIC $CFLAGS" + if test x$gcc_no_link = xyes; then + as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5 +fi +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +int f() { return 0; } +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + if test x$gcc_no_link = xyes; then + as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5 +fi +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +__thread int a; int b; int f() { return a = b; } +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + gcc_cv_have_tls=yes +else + gcc_cv_have_tls=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext +else + gcc_cv_have_tls=yes +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext + CFLAGS="$chktls_save_CFLAGS" + LDFLAGS="$chktls_save_LDFLAGS" +else + gcc_cv_have_tls=no +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext + + +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +__thread int a; int b; int main() { return a = b; } +_ACEOF +if ac_fn_c_try_run "$LINENO"; then : + chktls_save_LDFLAGS="$LDFLAGS" + LDFLAGS="-static $LDFLAGS" + if test x$gcc_no_link = xyes; then + as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5 +fi +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +int main() { return 0; } +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + if test "$cross_compiling" = yes; then : + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "cannot run test program while cross compiling +See \`config.log' for more details" "$LINENO" 5; } +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +__thread int a; int b; int main() { return a = b; } +_ACEOF +if ac_fn_c_try_run "$LINENO"; then : + gcc_cv_have_tls=yes +else + gcc_cv_have_tls=no +fi +rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ + conftest.$ac_objext conftest.beam conftest.$ac_ext +fi + +else + gcc_cv_have_tls=yes +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext + LDFLAGS="$chktls_save_LDFLAGS" + if test $gcc_cv_have_tls = yes; then + chktls_save_CFLAGS="$CFLAGS" + thread_CFLAGS=failed + for flag in '' '-pthread' '-lpthread'; do + CFLAGS="$flag $chktls_save_CFLAGS" + if test x$gcc_no_link = xyes; then + as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5 +fi +cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include + void *g(void *d) { return NULL; } +int +main () +{ +pthread_t t; pthread_create(&t,NULL,g,NULL); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_link "$LINENO"; then : + thread_CFLAGS="$flag" +fi +rm -f core conftest.err conftest.$ac_objext \ + conftest$ac_exeext conftest.$ac_ext + if test "X$thread_CFLAGS" != Xfailed; then + break + fi + done + CFLAGS="$chktls_save_CFLAGS" + if test "X$thread_CFLAGS" != Xfailed; then + CFLAGS="$thread_CFLAGS $chktls_save_CFLAGS" + if test "$cross_compiling" = yes; then : + { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5 +$as_echo "$as_me: error: in \`$ac_pwd':" >&2;} +as_fn_error $? "cannot run test program while cross compiling +See \`config.log' for more details" "$LINENO" 5; } +else + cat confdefs.h - <<_ACEOF >conftest.$ac_ext +/* end confdefs.h. */ +#include + __thread int a; + static int *volatile a_in_other_thread; + static void * + thread_func (void *arg) + { + a_in_other_thread = &a; + return (void *)0; + } +int +main () +{ +pthread_t thread; + void *thread_retval; + int *volatile a_in_main_thread; + a_in_main_thread = &a; + if (pthread_create (&thread, (pthread_attr_t *)0, + thread_func, (void *)0)) + return 0; + if (pthread_join (thread, &thread_retval)) + return 0; + return (a_in_other_thread == a_in_main_thread); + ; + return 0; +} +_ACEOF +if ac_fn_c_try_run "$LINENO"; then : + gcc_cv_have_tls=yes +else + gcc_cv_have_tls=no +fi +rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ + conftest.$ac_objext conftest.beam conftest.$ac_ext +fi + + CFLAGS="$chktls_save_CFLAGS" + fi + fi +else + gcc_cv_have_tls=no +fi +rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \ + conftest.$ac_objext conftest.beam conftest.$ac_ext +fi + +fi +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_have_tls" >&5 +$as_echo "$gcc_cv_have_tls" >&6; } + if test "$enable_tls $gcc_cv_have_tls" = "yes yes"; then + +$as_echo "#define HAVE_TLS 1" >>confdefs.h + + fi ;; *-netbsd* | *-openbsd*) SECTION_FLAGS='-ffunction-sections -fdata-sections' --- a/libstdc++-v3/crossconfig.m4 +++ b/libstdc++-v3/crossconfig.m4 @@ -204,6 +204,7 @@ GLIBCXX_CHECK_STDLIB_SUPPORT AC_CHECK_FUNCS(aligned_alloc posix_memalign memalign _aligned_malloc) AC_CHECK_FUNCS(_wfopen) + GCC_CHECK_TLS ;; *-netbsd* | *-openbsd*) SECTION_FLAGS='-ffunction-sections -fdata-sections'