Odp atomic operations based on compiler build-ins. Make
sure that compiler supports such operation at configure
stage.
Signed-off-by: Maxim Uvarov <maxim.uva...@linaro.org>
---
configure.ac | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/configure.ac b/configure.ac
index 8dbad4b..29387ee 100644
--- a/configure.ac
+++ b/configure.ac
@@ -40,6 +40,25 @@ AC_TYPE_INT32_T
AC_TYPE_UINT32_T
AC_TYPE_UINT64_T
+AC_MSG_CHECKING(for MAX GCC atomic builtins)
+AC_LINK_IFELSE(
+ [AC_LANG_SOURCE(
+ [[#include <stdint.h>
+ int main() {
+ volatile uint32_t v = 1;
+ __atomic_fetch_add(&v, 1, __ATOMIC_RELAXED);
+ __atomic_fetch_sub(&v, 1, __ATOMIC_RELAXED);
+ __atomic_store_n(&v, 1, __ATOMIC_RELAXED);
+ __atomic_load_n(&v, __ATOMIC_RELAXED);
+ return 0;
+ }
+ ]])],
+ AC_MSG_RESULT(yes),
+ AC_MSG_RESULT(no)
+ echo "Atomic operation are not supported by your compiller."
+ echo "Use newer version. For gcc > 4.7.3"
+ exit -1)
+
##########################################################################
# Determine which platform to build for
##########################################################################
--
1.8.5.1.163.gd7aced9
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