do not base feature checks on gcc version

Clang reports itself to be gcc4.2, so there fail there, instead use configure
checks.

Change-Id: Idb44a5c875b24a15546a6495de02a1b4af898443

config_host.mk.in

@@ -225,6 +225,7 @@ export HAVE_GCC_FNO_ENFORCE_EH_SPECS=@HAVE_GCC_FNO_ENFORCE_EH_SPECS@
 export HAVE_GCC_FNO_INLINE=@HAVE_GCC_FNO_INLINE@
 export HAVE_GCC_GGDB2=@HAVE_GCC_GGDB2@
 export HAVE_GCC_NO_LONG_DOUBLE=@HAVE_GCC_NO_LONG_DOUBLE@
+export HAVE_GCC_PRAGMA_OPERATOR=@HAVE_GCC_PRAGMA_OPERATOR@
 export HAVE_GCC_VISIBILITY_BROKEN=@HAVE_GCC_VISIBILITY_BROKEN@
 export HAVE_GCC_VISIBILITY_FEATURE=@HAVE_GCC_VISIBILITY_FEATURE@
 export HAVE_GETOPT=@HAVE_GETOPT@

config_host/config_global.h.in

@@ -21,6 +21,9 @@ Any change in this header will cause a rebuild of almost everything.
 #define HAVE_GCC_BUILTIN_ATOMIC 0
 #define HAVE_GCC_PRAGMA_DIAGNOSTIC_MODIFY 0
 #define HAVE_GCC_PRAGMA_DIAGNOSTIC_SCOPE 0
+/* _Pragma */
+#define HAVE_GCC_PRAGMA_OPERATOR 0
+#define HAVE_GCC_DEPRECATED_MESSAGE 0
 #define HAVE_THREADSAFE_STATICS 0
 #define HAVE_SYSLOG_H 0
 /* Compiler supports __attribute__((warn_unused)). */

configure.ac

@@ -5718,6 +5718,17 @@ if test "$GCC" = "yes"; then
         ], [AC_MSG_RESULT([no])])
     CFLAGS=$save_CFLAGS
 
+    AC_MSG_CHECKING([whether $CC supports __attribute__((deprecated(message)))])
+    save_CFLAGS=$CFLAGS
+    CFLAGS="$CFLAGS -Werror"
+    AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+            __attribute__((deprecated(test))) void f();
+        ])], [
+            AC_DEFINE([HAVE_GCC_DEPRECATED_MESSAGE],[1])
+            AC_MSG_RESULT([yes])
+        ], [AC_MSG_RESULT([no])])
+    CFLAGS=$save_CFLAGS
+
     AC_MSG_CHECKING([whether $CXX declares __cxa_allocate_exception in cxxabi.h])
     AC_LANG_PUSH([C++])
     AC_COMPILE_IFELSE([AC_LANG_SOURCE([
@@ -6086,6 +6097,25 @@ if test "$HAVE_CXX11" = "TRUE"; then
     fi
 fi
 
+HAVE_GCC_PRAGMA_OPERATOR=
+dnl _Pragma support (may require C++11)
+if test "$GCC" = "yes"; then
+    AC_MSG_CHECKING([whether $CXX supports _Pragma operator])
+    AC_LANG_PUSH([C++])
+    save_CXXFLAGS=$CXXFLAGS
+    CXXFLAGS="$CXXFLAGS $CXXFLAGS_CXX11 -Werror"
+    AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+            _Pragma("GCC diagnostic ignored \"-Wformat\"")
+        ])], [
+            AC_DEFINE([HAVE_GCC_PRAGMA_OPERATOR],[1])
+            HAVE_GCC_PRAGMA_OPERATOR=1
+            AC_MSG_RESULT([yes])
+        ], [AC_MSG_RESULT([no])])
+    AC_LANG_POP([C++])
+    CXXFLAGS=$save_CXXFLAGS
+fi
+AC_SUBST(HAVE_GCC_PRAGMA_OPERATOR)
+
 dnl ===================================================================
 dnl system stl sanity tests
 dnl ===================================================================

include/sal/types.h

@@ -469,7 +469,7 @@ template< typename T1, typename T2 > inline T1 static_int_cast(T2 n) {
         SAL_DEPRECATED("Dont use, its evil.") void doit(int nPara);
 */
 
-#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5))
+#if HAVE_GCC_DEPRECATED_MESSAGE
 #    define SAL_DEPRECATED(message) __attribute__((deprecated(message)))
 #elif (__GNUC__)
 #    define SAL_DEPRECATED(message) __attribute__((deprecated))
@@ -501,7 +501,7 @@ template< typename T1, typename T2 > inline T1 static_int_cast(T2 n) {
         SAL_WNODEPRECATED_DECLARATIONS_POP
 */
 
-#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) || defined(__clang__)
+#if HAVE_GCC_PRAGMA_DIAGNOSTIC_MODIFY && HAVE_GCC_PRAGMA_DIAGNOSTIC_SCOPE && HAVE_GCC_PRAGMA_OPERATOR
 #define SAL_WNODEPRECATED_DECLARATIONS_PUSH \
     _Pragma(SAL_STRINGIFY_ARG(GCC diagnostic push)) \
     _Pragma(SAL_STRINGIFY_ARG(GCC diagnostic ignored "-Wdeprecated-declarations"))

solenv/gbuild/platform/solaris.mk

@@ -98,7 +98,7 @@ gb_CXXFLAGS += -std=c++0x
 #When we are using 4.6.0 we can use gcc pragmas to selectively silence auto_ptr
 #warnings in isolation, but for <= 4.5.X we need to globally disable
 #deprecation
-ifeq ($(gb_GccLess460),1)
+ifeq ($(HAVE_GCC_PRAGMA_OPERATOR),)
 gb_CXXFLAGS += -Wno-deprecated-declarations
 endif
 endif

solenv/gbuild/platform/unxgcc.mk

@@ -94,7 +94,7 @@ gb_CXXFLAGS += $(CXXFLAGS_CXX11)
 #When we are using 4.6.0 we can use gcc pragmas to selectively silence auto_ptr
 #warnings in isolation, but for <= 4.5.X we need to globally disable
 #deprecation
-ifeq ($(gb_GccLess460),1)
+ifeq ($(HAVE_GCC_PRAGMA_OPERATOR),)
 gb_CXXFLAGS += -Wno-deprecated-declarations
 endif
 endif