* Better check for the __func__ keyword that does not rely on assumptions

about the compiler version.

Makefile.am

@@ -3,7 +3,7 @@
 SUBDIRS = src test doc
 DIST_SUBDIRS = $(SUBDIRS)
 
-EXTRA_DIST = bootstrap AUTHORS m4/cflags.m4
+EXTRA_DIST = bootstrap AUTHORS m4/cflags.m4 m4/func.m4
 ACLOCAL_AMFLAGS = -I m4
 AUTOMAKE_OPTIONS = foreign dist-bzip2
 

configure.ac

@@ -12,6 +12,7 @@ AC_PROG_CPP
 AC_PROG_LIBTOOL
 
 AC_C_INLINE
+AC_C_FUNC
 
 # Optimizations
 AC_TRY_CFLAGS(-g -O2, CFLAGS="${CFLAGS} -g -O2")

m4/func.m4

@@ -0,0 +1,13 @@
+dnl  Check for the __func__ keyword
+AC_DEFUN([AC_C_FUNC],
+ [AC_MSG_CHECKING(for __func__)
+  ac_v_func='"unknown"'
+  AC_TRY_COMPILE([], [char const *f = __func__;],
+   [ac_v_func="__func__"],
+   [AC_TRY_COMPILE([], [char const *f = __FUNCTION__;],
+     [ac_v_func="__FUNCTION__"])])
+  if test "$ac_v_func" != "__func__"; then
+    AC_DEFINE_UNQUOTED(__func__, $ac_v_func, [Define to a way to access function names])
+  fi
+  AC_MSG_RESULT($ac_v_func)])
+

msvc/config.h

@@ -41,6 +41,7 @@ typedef int pid_t;
 
 #define inline /* undefined */
 #define __attribute__(x) /* undefined */
+#define __func__ __FUNCTION__
 
 #define STDOUT_FILENO 1
 #define STDERR_FILENO 2

src/lib-load.h

@@ -16,15 +16,6 @@
  *  lib-load.h: preload library functions
  */
 
-/* The __func__ macro to get the current function name */
-#if __STDC_VERSION__ < 199901L
-#   if __GNUC__ >= 2
-#       define __func__ __FUNCTION__
-#   else
-#       define __func__ "<?>"
-#   endif
-#endif
-
 /* Symbol loading stuff */
 #define STR(x) #x
 #define ORIG(x) x##_orig