Fixed gcc 4.8 warnings

Disabled gcc warnings that are tripped by Eigen.

Removed signal code that is not needed in Linux port and was
causing gcc warnings.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

makefiles/toolchain_native.mk

@@ -61,7 +61,7 @@ CLANGVER=
 endif
 endif
 
-#USE_GCC=1
+USE_GCC=0
 
 ifeq ($(USE_GCC),1)
 # GCC Options:
@@ -162,6 +162,8 @@ ARCHWARNINGS		+= -Wdouble-promotion \
 			   -Wlogical-op \
 			   -Wformat=1 \
 			   -Werror=unused-but-set-variable \
+			   -Wno-error=unused-local-typedefs \
+			   -Wno-error=enum-compare \
 			   -Werror=double-promotion 
 ARCHOPTIMIZATION	+= -fno-strength-reduce 
 endif

src/platforms/linux/px4_layer/px4_linux_impl.cpp

@@ -49,39 +49,17 @@
 
 __BEGIN_DECLS
 
-// FIXME - This needs to be properly initialized
-struct param_info_s      param_array[256];
-struct param_info_s      *param_info_base;
-struct param_info_s      *param_info_limit;
-
 long PX4_TICKS_PER_SEC = sysconf(_SC_CLK_TCK);
 
 __END_DECLS
 
 extern struct wqueue_s gwork[NWORKERS];
 
-void sighandler(int sig)
-{
-	printf("Received sig %d\n", sig);
-}
-
 namespace px4
 {
 
 void init(int argc, char *argv[], const char *app_name)
 {
-	int ret;
-	struct sigaction actions;
-
-	memset(&actions, 0, sizeof(actions));
-	sigemptyset(&actions.sa_mask);
-	actions.sa_flags = 0;
-	actions.sa_handler = sighandler;
-	ret = sigaction(SIGUSR2,&actions,NULL);
-
-	if (ret < 0) {
-		printf("sigaction failed: %d\n", errno);
-	}
 	printf("App name: %s\n", app_name);
 
 	// Create high priority worker thread

src/systemcmds/param/param.c

@@ -182,7 +182,7 @@ static int
 do_save(const char *param_file_name)
 {
 	/* create the file */
-	int fd = open(param_file_name, O_WRONLY | O_CREAT);
+	int fd = open(param_file_name, O_WRONLY | O_CREAT, 0x777);
 
 	if (fd < 0) {
 		warn("opening '%s' failed", param_file_name);