diff --git a/sourcepawn/compiler/AMBuilder b/sourcepawn/compiler/AMBuilder
index 6b539b82..f7982203 100644
--- a/sourcepawn/compiler/AMBuilder
+++ b/sourcepawn/compiler/AMBuilder
@@ -16,7 +16,7 @@ elif compiler.cc.name == 'msvc':
 	compiler['POSTLINKFLAGS'].append('/SUBSYSTEM:CONSOLE')
 
 if AMBuild.target['platform'] == 'linux':
-	compiler['CDEFINES'].extend(['LINUX', 'HAVE_STDINT_H', 'AMX_ANSIONLY', 'ENABLE_BINRELOC'])
+	compiler['CDEFINES'].extend(['LINUX', 'HAVE_STDINT_H', 'AMX_ANSIONLY', 'ENABLE_BINRELOC', '_GNU_SOURCE'])
 elif AMBuild.target['platform'] == 'darwin':
 	compiler['CDEFINES'].extend(['DARWIN', 'HAVE_STDINT_H', 'AMX_ANSIONLY', 'ENABLE_BINRELOC'])
 
diff --git a/sourcepawn/compiler/Makefile b/sourcepawn/compiler/Makefile
index e01b817d..1d5c4f59 100644
--- a/sourcepawn/compiler/Makefile
+++ b/sourcepawn/compiler/Makefile
@@ -30,7 +30,7 @@ LINK = -lgcc -static-libgcc
 
 INCLUDE = -I. -I$(SMSDK)/public -I$(SMSDK)/public/sourcepawn
 
-CFLAGS += -DLINUX -DHAVE_STDINT_H -DAMX_ANSIONLY -DENABLE_BINRELOC -Dstricmp=strcasecmp -m32
+CFLAGS += -D_GNU_SOURCE -Wall -Werror -Wno-uninitialized -Wno-unused-result -Wno-unused -Wno-switch -Wno-parentheses -Wno-format -DLINUX -DHAVE_STDINT_H -DAMX_ANSIONLY -DENABLE_BINRELOC -Dstricmp=strcasecmp -m32
 CPPFLAGS += -Wno-non-virtual-dtor -fno-exceptions -fno-rtti
 
 ################################################
diff --git a/sourcepawn/compiler/sc2.c b/sourcepawn/compiler/sc2.c
index c792ed4d..03293f93 100644
--- a/sourcepawn/compiler/sc2.c
+++ b/sourcepawn/compiler/sc2.c
@@ -59,7 +59,7 @@ static short skiplevel; /* level at which we started skipping (including nested
 static unsigned char term_expr[] = "";
 static int listline=-1; /* "current line" for the list file */
 
-#if defined __GNUC__
+#if defined DARWIN
 static double pow10(double d)
 {
   return pow(10, d);