Take _GNU_SOURCE out of source and put it in CFLAGS

Rakefile

@@ -12,7 +12,9 @@ TEST_SOURCES = FileList['tests/*.c']
 TEST_OBJECTS = TEST_SOURCES.pathmap( "%{^tests,build/tests}X.o" )
 
 LIBS    = %w( pthread )
-CCFLAGS = %w( -Wall 
+CCFLAGS = %w(
+             -D_GNU_SOURCE=1
+             -Wall 
              -Wextra 
              -Werror-implicit-function-declaration 
              -Wstrict-prototypes
@@ -129,8 +131,23 @@ file check("serve") =>
   gcc_link t.name, t.prerequisites + [LIBCHECK]
 end
 
+file check("readwrite") =>
+%w{build/tests/check_readwrite.o
+  build/readwrite.o
+  build/client.o
+  build/self_pipe.o
+  build/serve.o
+  build/parse.o
+  build/acl.o
+  build/control.o
+  build/nbdtypes.o
+  build/ioutil.o
+  build/util.o} do |t|
+  gcc_link t.name, t.prerequisites + [LIBCHECK]
+end
 
-(TEST_MODULES- %w{acl client serve}).each do |m|
+
+(TEST_MODULES- %w{acl client serve readwrite}).each do |m|
   tgt = "build/tests/check_#{m}.o"
   deps = ["build/ioutil.o", "build/util.o"]
   maybe_obj_name = "build/#{m}.o"

src/control.c

@@ -227,7 +227,6 @@ int control_mirror(struct control_params* client, int linesc, char** lines)
 	
 	
 	remote_size = socket_nbd_read_hello(fd);
-	remote_size = remote_size; // shush compiler
 	
 	mirror = xmalloc(sizeof(struct mirror_status));
 	mirror->client = fd;

src/ioutil.c

@@ -1,6 +1,3 @@
-#define _LARGEFILE64_SOURCE
-#define _GNU_SOURCE
-
 #include <sys/mman.h>
 #include <sys/sendfile.h>
 #include <sys/ioctl.h>

src/nbdtypes.h

@@ -10,10 +10,7 @@
 #define REQUEST_READ 0 
 #define REQUEST_WRITE 1 
 #define REQUEST_DISCONNECT 2 
-
-#ifndef _LARGEFILE64_SOURCE
-# define _LARGEFILE64_SOURCE
-#endif
+#define REQUEST_ENTRUST (1<<16)
 
 #include <linux/types.h>
 #include <inttypes.h>

src/serve.h

@@ -1,10 +1,6 @@
 #ifndef SERVE_H
 #define SERVE_H
 
-#define _GNU_SOURCE
-
-#define _LARGEFILE64_SOURCE
-
 #include <sys/types.h>
 #include <unistd.h>