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# FP_GCC_SUPPORTS__ATOMICS
# ------------------------
# Does gcc support the __atomic_* family of builtins?
AC_DEFUN([FP_GCC_SUPPORTS__ATOMICS],
[
AC_REQUIRE([AC_PROG_CC])
AC_MSG_CHECKING([whether GCC supports __atomic_ builtins])
echo 'int test(int *x) { int y; __atomic_load(&x, &y, __ATOMIC_SEQ_CST); return x; }' > conftest.c
if $CC -c conftest.c > /dev/null 2>&1; then
CONF_GCC_SUPPORTS__ATOMICS=YES
AC_MSG_RESULT([yes])
else
CONF_GCC_SUPPORTS__ATOMICS=NO
AC_MSG_RESULT([no])
fi
rm -f conftest.c conftest.o
])
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