[svn-r15639] Purpose: Check for __func__ keyword during configure

Description:
In some of the new H5EA* code, many new C99 features are being used.  Most of them are portable to all compilers, but the __func__ keyword in particular isn't supported in Visual Studio on Windows.  Instead, Windows defines the __FUNCTION__ keyword, which can be used as a direct substitute.

We now check for the __func__ keyword during configure and define the feature flag H5_HAVE_C99_FUNC.  There was previously a check for __FUNCTION__, and the feature flags H5_HAVE_FUNCTION.  In H5EApkg.h, we check for the presents of each of these in order to see which to use.  If neither are avaiable, fail.

Tested:
h5committest (kagiso, smirom, linew)

1 files changed, 59 insertions, 1 deletions

diff --git a/configure b/configure
index ec00c0e..c483a1e 100755
--- a/configure
+++ b/configure
@@ -46356,6 +46356,64 @@ fi
 
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 
+{ echo "$as_me:$LINENO: checking for __func__ extension" >&5
+echo $ECHO_N "checking for __func__ extension... $ECHO_C" >&6; }
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+#ifdef FC_DUMMY_MAIN
+#ifndef FC_DUMMY_MAIN_EQ_F77
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int FC_DUMMY_MAIN() { return 1; }
+#endif
+#endif
+int
+main ()
+{
+ const char *fname = __func__;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_C99_FUNC 1
+_ACEOF
+
+               { echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6; }
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	{ echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6; }
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 { echo "$as_me:$LINENO: checking for __FUNCTION__ extension" >&5
 echo $ECHO_N "checking for __FUNCTION__ extension... $ECHO_C" >&6; }
 cat >conftest.$ac_ext <<_ACEOF
@@ -46376,7 +46434,7 @@ cat >>conftest.$ac_ext <<_ACEOF
 int
 main ()
 {
-(void)__FUNCTION__
+ const char *fname = __FUNCTION__;
   ;
   return 0;
 }