[njs] All C feature attributes have been disabled for Linux/PPC64.

[Igor Sysoev]

details:   http://hg.nginx.org/njs/rev/6a983847db14
branches:  
changeset: 180:6a983847db14
user:      Igor Sysoev <igor at sysoev.ru>
date:      Sat Sep 24 22:13:31 2016 +0300
description:
All C feature attributes have been disabled for Linux/PPC64.

diffstat:

 nxt/auto/clang  |  155 ++++++++++++++++++++++++++++++-------------------------
 nxt/nxt_clang.h |    6 --
 2 files changed, 84 insertions(+), 77 deletions(-)

diffs (190 lines):

diff -r 6c65289c3696 -r 6a983847db14 nxt/auto/clang
--- a/nxt/auto/clang	Fri Sep 23 11:59:58 2016 +0300
+++ b/nxt/auto/clang	Sat Sep 24 22:13:31 2016 +0300
@@ -166,85 +166,98 @@ 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;
-                  }"
-. ${NXT_AUTO}feature
-
+nxt_os="$NXT_SYSTEM/$NXT_SYSTEM_PLATFORM"
 
-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();
-                  }"
-. ${NXT_AUTO}feature
+if [ "$nxt_os" = "Linux/ppc64le" ]; then
 
+    # Old GNU ld linker may hang on Linux ppc64le platform
+    # if some of these features are enabled.
 
-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
+    echo "checking for C language features is disabled for $nxt_os."
+
+else
+
+    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 __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 __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 __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 __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__ 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__));
+    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\")));
 
-                  void *f(void) {
-                      return malloc(1);
-                  }
+		      int main() {
+			  return 1;
+		      }"
+    . ${NXT_AUTO}feature
 
-                  int main() {
-                      if (f() != NULL) {
-                          return 1;
-                      }
-                      return 0;
-                  }"
-. ${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
+
+fi
diff -r 6c65289c3696 -r 6a983847db14 nxt/nxt_clang.h
--- a/nxt/nxt_clang.h	Fri Sep 23 11:59:58 2016 +0300
+++ b/nxt/nxt_clang.h	Sat Sep 24 22:13:31 2016 +0300
@@ -61,13 +61,7 @@
 
 
 #if (NXT_HAVE_GCC_ATTRIBUTE_ALIGNED)
-
-#if (NXT_LINUX && __PPC64__)
-/* Old GNU ld linker may hang on Linux ppc64le platform. */
-#define nxt_aligned(x)
-#else
 #define nxt_aligned(x)     __attribute__((aligned(x)))
-#endif
 
 #else
 #define nxt_aligned(x)