20000317 sourceware import

libgloss/libnosys/warning.h

@@ -0,0 +1,39 @@
+#ifndef __WARNING_H__
+#define __WARNING_H__
+
+#ifdef HAVE_GNU_LD
+# ifdef HAVE_ELF
+
+/* We want the .gnu.warning.SYMBOL section to be unallocated.  */
+#  ifdef HAVE_ASM_PREVIOUS_DIRECTIVE
+#   define __make_section_unallocated(section_string)   \
+  asm(".section " section_string "; .previous");
+#  elif defined (HAVE_ASM_POPSECTION_DIRECTIVE)
+#   define __make_section_unallocated(section_string)   \
+  asm(".pushsection " section_string "; .popsection");
+#  else
+#   define __make_section_unallocated(section_string)
+#  endif
+
+#  define link_warning(symbol, msg)                     \
+  __make_section_unallocated (".gnu.warning." #symbol)  \
+  static const char __evoke_link_warning_##symbol[]     \
+    __attribute__ ((section (".gnu.warning." #symbol))) = msg;
+
+#else /* !ELF */
+
+#  define link_warning(symbol, msg)             \
+  asm(".stabs \"" msg "\",30,0,0,0\n"   \
+      ".stabs \"" __SYMBOL_PREFIX #symbol "\",1,0,0,0\n");
+# endif
+#else /* !GNULD */
+/* We will never be heard; they will all die horribly.  */
+# define link_warning(symbol, msg)
+#endif
+
+/* A canned warning for sysdeps/stub functions.  */
+#define stub_warning(name) \
+  link_warning (name, \
+                "warning: " #name " is not implemented and will always fail")
+
+#endif /* __WARNING_H__ */