diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index c7504a2..da096a7 100644 --- a/configure.ac +++ b/configure.ac @@ -4884,6 +4884,45 @@ if test "$have_gcc_asm_for_x87" = yes; then esac fi +# Check for stdatomic.h +AC_MSG_CHECKING(for stdatomic.h) +AC_LINK_IFELSE( +[ + AC_LANG_SOURCE([[ + #include <stdatomic.h> + _Atomic int value = ATOMIC_VAR_INIT(1); + int main() { + int loaded_value = atomic_load(&value); + return 0; + } + ]]) +],[have_stdatomic_h=yes],[have_stdatomic_h=no]) + +AC_MSG_RESULT($have_stdatomic_h) + +if test "$have_stdatomic_h" = yes; then + AC_DEFINE(HAVE_STD_ATOMIC, 1, [Has stdatomic.h]) +fi + +# Check for GCC >= 4.7 __atomic builtins +AC_MSG_CHECKING(for GCC >= 4.7 __atomic builtins) +AC_LINK_IFELSE( +[ + AC_LANG_SOURCE([[ + volatile int val = 1; + int main() { + __atomic_load_n(&val, __ATOMIC_SEQ_CST); + return 0; + } + ]]) +],[have_builtin_atomic=yes],[have_builtin_atomic=no]) + +AC_MSG_RESULT($have_builtin_atomic) + +if test "$have_builtin_atomic" = yes; then + AC_DEFINE(HAVE_BUILTIN_ATOMIC, 1, [Has builtin atomics]) +fi + # ensurepip option AC_MSG_CHECKING(for ensurepip) AC_ARG_WITH(ensurepip, |