directives.c (do_linemarker, do_line): Use CPP_STRING for ignored enum value.

2009-07-17  Jerry Quinn  <jlquinn@optonline.net>

	* directives.c (do_linemarker, do_line): Use CPP_STRING for
	ignored enum value.
	* files.c (find_file_in_dir): Add cast from void* to char*.
	* symtab.c (ht_lookup_with_hash): Add cast from void* to char*.
	* Makefile.in: (WARN_CFLAGS): Use general and C-specific
	warnings.
	(CXX, CXXFLAGS, WARN_CXXFLAGS, ALL_CXXFLAGS,
	ENABLE_BUILD_WITH_CXX, CCDEPMODE, CXXDEPMODE, COMPILER,
	COMPILER_FLAGS): New.
	(DEPMODE): Set from CCDEPMODE or CXXDEPMODE.
	(COMPILE.base): Use COMPILER instead of CC.  Use COMPILER_FLAGS
	instead of ALL_CFLAGS.
	* configure.ac: Invoke AC_PROG_CXX.  Separate C-specific warnings
	from other warnings.  Add -Wc++-compat to C-specific warnings.
	Check for --enable-build-with-cxx.  Set and substitute
	ENABLE_BUILD_WITH_CXX.  Invoke ZW_PROG_COMPILER_DEPENDENCIES
	according to ENABLE_BUILD_WITH_CXX.  Invoke AC_LANG before
	AC_CHECK_HEADERS.
	* configure: Rebuild.
	* include/cpp-id-data.h: Remove extern "C".
	* include/line-map.h: Likewise.
	* include/mkdeps.h: Likewise.
	* include/symtab.h: Likewise.
	* internal.h: Likewise.

From-SVN: r149763

libcpp/include/symtab.h

@@ -21,10 +21,6 @@ along with this program; see the file COPYING3.  If not see
 
 #include "obstack.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 #ifndef GTY
 #define GTY(x) /* nothing */
 #endif
@@ -104,8 +100,4 @@ extern void ht_load (hash_table *ht, hashnode *entries,
 /* Dump allocation statistics to stderr.  */
 extern void ht_dump_statistics (hash_table *);
 
-#ifdef __cplusplus
-}
-#endif
-
 #endif /* LIBCPP_SYMTAB_H */