[PATCH 1/4] Compilation cleanups

[Daniel Colascione <dancol@dancol.org>]

These fixes are necessary for compiling Emacs cleanly and without warnings.
---
 lib-src/update-game-score.c |    2 ++
 src/gmalloc.c               |    4 ++--
 src/unexcw.c                |    2 ++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/lib-src/update-game-score.c b/lib-src/update-game-score.c
index e335617..5367f11 100644
--- a/lib-src/update-game-score.c
+++ b/lib-src/update-game-score.c
@@ -48,8 +48,10 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <sys/stat.h>
 
 /* Needed for SunOS4, for instance.  */
+#if !defined(CYGWIN)
 extern char *optarg;
 extern int optind, opterr;
+#endif // !defined(CYGWIN)
 
 static int usage (int err) NO_RETURN;
 
diff --git a/src/gmalloc.c b/src/gmalloc.c
index 7b5e6df..099a34b 100644
--- a/src/gmalloc.c
+++ b/src/gmalloc.c
@@ -1076,7 +1076,7 @@ _free_internal_nolock (ptr)
     return;
 
 #ifdef CYGWIN
-  if (ptr < _heapbase)
+  if ((char*)ptr < (char*)_heapbase)
     /* We're being asked to free something in the static heap. */
     return;
 #endif
@@ -1428,7 +1428,7 @@ _realloc_internal_nolock (ptr, size)
     return _malloc_internal_nolock (size);
 
 #ifdef CYGWIN
-  if (ptr < _heapbase)
+  if ((char*)ptr < (char*)_heapbase)
     /* ptr points into the static heap */
     return special_realloc (ptr, size);
 #endif
diff --git a/src/unexcw.c b/src/unexcw.c
index 62df82e..0629420 100644
--- a/src/unexcw.c
+++ b/src/unexcw.c
@@ -31,6 +31,8 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #define DOTEXE ".exe"
 
+extern void report_sheap_usage (int);
+
 extern int bss_sbrk_did_unexec;
 
 extern int __malloc_initialized;
-- 
1.7.5.1