diff options
| -rw-r--r-- | configure.ac | 85 |
1 files changed, 49 insertions, 36 deletions
diff --git a/configure.ac b/configure.ac index d57e3b9196..5e1a5e14a1 100644 --- a/configure.ac +++ b/configure.ac @@ -194,6 +194,12 @@ AC_ARG_ENABLE([glibc-back-compat], [use_glibc_compat=$enableval], [use_glibc_compat=no]) +AC_ARG_ENABLE([threadlocal], + [AS_HELP_STRING([--enable-threadlocal], + [enable features that depend on the c++ thread_local keyword (currently just thread names in debug logs). (default is to enabled if there is platform support and glibc-back-compat is not enabled)])], + [use_thread_local=$enableval], + [use_thread_local=auto]) + AC_ARG_ENABLE([asm], [AS_HELP_STRING([--disable-asm], [disable assembly routines (enabled by default)])], @@ -827,42 +833,49 @@ AC_LINK_IFELSE([AC_LANG_SOURCE([ ] ) -TEMP_LDFLAGS="$LDFLAGS" -LDFLAGS="$TEMP_LDFLAGS $PTHREAD_CFLAGS" -AC_MSG_CHECKING([for thread_local support]) -AC_LINK_IFELSE([AC_LANG_SOURCE([ - #include <thread> - static thread_local int foo = 0; - static void run_thread() { foo++;} - int main(){ - for(int i = 0; i < 10; i++) { std::thread(run_thread).detach();} - return foo; - } - ])], - [ - case $host in - *mingw*) - # mingw32's implementation of thread_local has also been shown to behave - # erroneously under concurrent usage; see: - # https://gist.github.com/jamesob/fe9a872051a88b2025b1aa37bfa98605 - AC_MSG_RESULT(no) - ;; - *darwin*) - # TODO enable thread_local on later versions of Darwin where it is - # supported (per https://stackoverflow.com/a/29929949) - AC_MSG_RESULT(no) - ;; - *) - AC_DEFINE(HAVE_THREAD_LOCAL,1,[Define if thread_local is supported.]) - AC_MSG_RESULT(yes) - ;; - esac - ], - [ - AC_MSG_RESULT(no) - ] -) -LDFLAGS="$TEMP_LDFLAGS" +if test "x$use_thread_local" = xyes || { test "x$use_thread_local" = xauto && test "x$use_glibc_compat" = xno; }; then + TEMP_LDFLAGS="$LDFLAGS" + LDFLAGS="$TEMP_LDFLAGS $PTHREAD_CFLAGS" + AC_MSG_CHECKING([for thread_local support]) + AC_LINK_IFELSE([AC_LANG_SOURCE([ + #include <thread> + static thread_local int foo = 0; + static void run_thread() { foo++;} + int main(){ + for(int i = 0; i < 10; i++) { std::thread(run_thread).detach();} + return foo; + } + ])], + [ + case $host in + *mingw*) + # mingw32's implementation of thread_local has also been shown to behave + # erroneously under concurrent usage; see: + # https://gist.github.com/jamesob/fe9a872051a88b2025b1aa37bfa98605 + AC_MSG_RESULT(no) + ;; + *darwin*) + # TODO enable thread_local on later versions of Darwin where it is + # supported (per https://stackoverflow.com/a/29929949) + AC_MSG_RESULT(no) + ;; + *freebsd*) + # FreeBSD's implementation of thread_local is also buggy (per + # https://groups.google.com/d/msg/bsdmailinglist/22ncTZAbDp4/Dii_pII5AwAJ) + AC_MSG_RESULT(no) + ;; + *) + AC_DEFINE(HAVE_THREAD_LOCAL,1,[Define if thread_local is supported.]) + AC_MSG_RESULT(yes) + ;; + esac + ], + [ + AC_MSG_RESULT(no) + ] + ) + LDFLAGS="$TEMP_LDFLAGS" +fi # Check for different ways of gathering OS randomness AC_MSG_CHECKING(for Linux getrandom syscall) |