Mac build fixes (bug 4392, r=me).

sourcepawn/compiler/AMBuilder

@@ -9,13 +9,16 @@ compiler['CINCLUDES'].append(os.path.join(AMBuild.outputFolder, 'includes'))
 
 if compiler.cc.name == 'gcc':
 	compiler['CFLAGS'].extend(['-Wno-parentheses', '-Wno-format'])
-	compiler['POSTLINKFLAGS'].extend(['-lgcc', '-lm'])
+	if AMBuild.target['platform'] == 'linux':
+		compiler['POSTLINKFLAGS'].extend(['-lgcc', '-lm'])
 elif compiler.cc.name == 'msvc':
 	compiler['POSTLINKFLAGS'].remove('/SUBSYSTEM:WINDOWS')
 	compiler['POSTLINKFLAGS'].append('/SUBSYSTEM:CONSOLE')
 
 if AMBuild.target['platform'] == 'linux':
 	compiler['CDEFINES'].extend(['LINUX', 'HAVE_STDINT_H', 'AMX_ANSIONLY', 'ENABLE_BINRELOC'])
+elif AMBuild.target['platform'] == 'darwin':
+	compiler['CDEFINES'].extend(['DARWIN', 'HAVE_STDINT_H', 'AMX_ANSIONLY', 'ENABLE_BINRELOC'])
 
 extension = AMBuild.AddJob('spcomp')
 binary = Cpp.ExecutableBuilder('spcomp', AMBuild, extension, compiler)

sourcepawn/compiler/pawncc.c

@@ -8,7 +8,7 @@
 #include "amxdbg.h"
 #include "osdefs.h"
 #include "zlib/zlib.h"
-#if defined LINUX
+#if defined LINUX || defined DARWIN
 #include <unistd.h>
 #elif defined WIN32
 #include <io.h>

sourcepawn/compiler/sc1.c

@@ -35,7 +35,7 @@
   #include <io.h>
 #endif
 
-#if defined LINUX || defined __FreeBSD__ || defined __OpenBSD__
+#if defined LINUX || defined __FreeBSD__ || defined __OpenBSD__ || defined DARWIN
   #include <sclinux.h>
   #include <binreloc.h> /* from BinReloc, see www.autopackage.org */
   #include <unistd.h>