Differences From Artifact [ba69b79b62]:
- File configure.ac — part of check-in [7326a487c0] at 2014-05-14 18:26:24 on branch trunk — Try -std=c1x when -std=c11 is unavailable (user: js, size: 26177) [annotate] [blame] [check-ins using]
To Artifact [c1957ea278]:
- File
configure.ac
— part of check-in
[c701e89b83]
at
2014-05-14 20:19:05
on branch trunk
— Use thread_local instead of __thread
If threads.h exists, the thread_local from there is used. If it doesn't,
but _Thread_local exists, it's defined to that. As a last fallback, it
is defined to __thread. (user: js, size: 26910) [annotate] [blame] [check-ins using]
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AC_SUBST(USE_SRCS_THREADS, '${SRCS_THREADS}')
AC_SUBST(USE_INCLUDES_THREADS, '${INCLUDES_THREADS}')
AC_ARG_ENABLE(compiler-tls,
AS_HELP_STRING([--disable-compiler-tls],
[disable compiler thread local storage]))
AS_IF([test x"$enable_compiler_tls" != x"no"], [
AC_MSG_CHECKING(whether __thread works)
AC_TRY_LINK([
/* It seems __thread is buggy with GCC 4.1 */
#if __GNUC__ == 4 && __GNUC_MINOR__ < 2
# error buggy
#endif
__thread int x = 0;
], [
x++;
], [
AS_IF([test x"$enable_shared" != x"no"], [
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -fPIC"
AC_TRY_COMPILE([
__thread int x = 0;
], [
x++;
], [
AC_MSG_RESULT(yes)
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AC_SUBST(USE_SRCS_THREADS, '${SRCS_THREADS}')
AC_SUBST(USE_INCLUDES_THREADS, '${INCLUDES_THREADS}')
AC_ARG_ENABLE(compiler-tls,
AS_HELP_STRING([--disable-compiler-tls],
[disable compiler thread local storage]))
AS_IF([test x"$enable_compiler_tls" != x"no"], [
AC_CHECK_HEADERS(threads.h, [
AC_DEFINE(OF_HAVE_THREADS_H, 1,
[Whether we have threads.h])
])
AC_MSG_CHECKING(whether _Thread_local works)
AC_TRY_LINK([
static _Thread_local int x = 0;
], [
x++;
], [
AS_IF([test x"$enable_shared" != x"no"], [
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -fPIC"
AC_TRY_COMPILE([
static _Thread_local int x = 0;
], [
x++;
], [
AC_MSG_RESULT(yes)
AC_DEFINE(OF_HAVE__THREAD_LOCAL, 1,
[Whether _Thread_local works])
], [
AC_MSG_RESULT(no)
])
OBJCFLAGS="$old_OBJCFLAGS"
], [
AC_MSG_RESULT(yes)
AC_DEFINE(OF_HAVE__THREAD_LOCAL, 1,
[Whether _Thread_local works])
])
], [
AC_MSG_RESULT(no)
])
AC_MSG_CHECKING(whether __thread works)
AC_TRY_LINK([
/* It seems __thread is buggy with GCC 4.1 */
#if __GNUC__ == 4 && __GNUC_MINOR__ < 2
# error buggy
#endif
__thread int x = 0;
], [
x++;
], [
AS_IF([test x"$enable_shared" != x"no"], [
old_OBJCFLAGS="$OBJCFLAGS"
OBJCFLAGS="$OBJCFLAGS -fPIC"
AC_TRY_COMPILE([
__thread int x = 0;
], [
x++;
], [
AC_MSG_RESULT(yes)
AC_DEFINE(OF_HAVE___THREAD, 1,
[Whether __thread works])
], [
AC_MSG_RESULT(no)
])
OBJCFLAGS="$old_OBJCFLAGS"
], [
AC_MSG_RESULT(yes)
AC_DEFINE(OF_HAVE___THREAD, 1,
[Whether __thread works])
])
], [
AC_MSG_RESULT(no)
])
])
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