[njs] C language features have been enabled.

[Igor Sysoev]

details:   http://hg.nginx.org/njs/rev/47f4830c3d22
branches:  
changeset: 162:47f4830c3d22
user:      Igor Sysoev <igor at sysoev.ru>
date:      Tue Aug 30 12:11:24 2016 +0300
description:
C language features have been enabled.

diffstat:

 nxt/auto/clang |  86 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 86 insertions(+), 0 deletions(-)

diffs (93 lines):

diff -r 323f00dc9879 -r 47f4830c3d22 nxt/auto/clang
--- a/nxt/auto/clang	Tue Aug 30 12:05:46 2016 +0300
+++ b/nxt/auto/clang	Tue Aug 30 12:11:24 2016 +0300
@@ -162,3 +162,89 @@ cat << END >> $NXT_MAKEFILE_CONF
 NXT_CC =	${CC}
 NXT_CFLAGS =	${CFLAGS} ${NXT_CFLAGS}
 END
+
+
+# C language features.
+
+nxt_feature="GCC __builtin_expect()"
+nxt_feature_name=NXT_HAVE_BUILTIN_EXPECT
+nxt_feature_run=no
+nxt_feature_incs=
+nxt_feature_libs=
+nxt_feature_test="int main(int argc, char *const *argv) {
+                      if ((__typeof__(argc == 0))
+                                   __builtin_expect((argc == 0), 0))
+                          return 0;
+                      return 1;
+                  }"
+. ${NXT_AUTO}feature
+
+
+nxt_feature="GCC __builtin_unreachable()"
+nxt_feature_name=NXT_HAVE_BUILTIN_UNREACHABLE
+nxt_feature_run=no
+nxt_feature_incs=
+nxt_feature_libs=
+nxt_feature_test="int main() {
+                      __builtin_unreachable();
+                  }"
+. ${NXT_AUTO}feature
+
+
+nxt_feature="GCC __builtin_prefetch()"
+nxt_feature_name=NXT_HAVE_BUILTIN_PREFETCH
+nxt_feature_run=no
+nxt_feature_incs=
+nxt_feature_libs=
+nxt_feature_test="int main() {
+                      __builtin_prefetch(0);
+                  }"
+. ${NXT_AUTO}feature
+
+
+nxt_feature="GCC __attribute__ visibility"
+nxt_feature_name=NXT_HAVE_GCC_ATTRIBUTE_VISIBILITY
+nxt_feature_run=
+nxt_feature_path=
+nxt_feature_libs=
+nxt_feature_test="int n __attribute__ ((visibility(\"default\")));
+
+                  int main() {
+                      return 1;
+                  }"
+. ${NXT_AUTO}feature
+
+
+nxt_feature="GCC __attribute__ aligned"
+nxt_feature_name=NXT_HAVE_GCC_ATTRIBUTE_ALIGNED
+nxt_feature_run=
+nxt_feature_path=
+nxt_feature_libs=
+nxt_feature_test="int n __attribute__ ((aligned(64)));
+
+                  int main() {
+                      return 1;
+                  }"
+. ${NXT_AUTO}feature
+
+
+nxt_feature="GCC __attribute__ malloc"
+nxt_feature_name=NXT_HAVE_GCC_ATTRIBUTE_MALLOC
+nxt_feature_run=
+nxt_feature_path=
+nxt_feature_libs=
+nxt_feature_test="#include <stdlib.h>
+
+                  void *f(void) __attribute__ ((__malloc__));
+
+                  void *f(void) {
+                      return malloc(1);
+                  }
+
+                  int main() {
+                      if (f() != NULL) {
+                          return 1;
+                      }
+                      return 0;
+                  }"
+. ${NXT_AUTO}feature