diff options
| author | Mike Holmes <mike.holmes@linaro.org> | 2015-03-07 22:47:40 -0500 |
|---|---|---|
| committer | Venkatesh Vivekanandan <venkatesh.vivekanandan@linaro.org> | 2015-03-16 12:13:30 +0530 |
| commit | 9a29c9544c19061a7c6d0bcf1716e9c25d65b2fd (patch) | |
| tree | 4ab7e9ef0479afa50aa99e69d9671da99002bdce /platform/linux-dpdk/m4 | |
| parent | 0bb5f377e380fce106c0715f3299938c7933a50b (diff) | |
linux-dpdk: m4: add configure.m4
When reusing linux-generic atomic.h, use of the built support is
checked at configure time, until the odp-dpdk implementation uses the
dpdk defined http://dpdk.org/doc/api/rte__atomic_8h.html it should do
the same.
Signed-off-by: Mike Holmes <mike.holmes@linaro.org>
Reviewed-by: Venkatesh Vivekanandan <venkatesh.vivekanandan@linaro.org>
Diffstat (limited to 'platform/linux-dpdk/m4')
| -rw-r--r-- | platform/linux-dpdk/m4/configure.m4 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/platform/linux-dpdk/m4/configure.m4 b/platform/linux-dpdk/m4/configure.m4 new file mode 100644 index 000000000..00f2f897b --- /dev/null +++ b/platform/linux-dpdk/m4/configure.m4 @@ -0,0 +1,17 @@ +AC_MSG_CHECKING(for GCC atomic builtins) +AC_LINK_IFELSE( + [AC_LANG_SOURCE( + [[int main() { + int 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 "GCC-style __atomic builtins not supported by the compiler." + echo "Use newer version. For gcc > 4.7.0" + exit -1) |