src: rename main function to 'm0_main' to avoid warnings

With recent GCC versions (we currently use GCC-6.3.0 for code-size
and static analysis reasons), we can neither have a main()-function
that has a void return-type (warns on return not being 'int') nor
can we have a function with an 'int' return-type marked 'noreturn'.

Consequently we rename the main-function to 'm0_main' to help the
compiler understand that we are not in a standard C runtime.

2 files changed, 3 insertions, 3 deletions

diff --git a/src/main.c b/src/main.c
index 95659c4..7ab16e2 100644
--- a/src/main.c
+++ b/src/main.c
@@ -31,7 +31,7 @@
 #include <m0_param.h>
 #include "rk3399_mcu.h"
 
-__attribute__((noreturn)) void main(void)
+__attribute__((noreturn)) void m0_main(void)
 {
 	switch (mmio_read_32(PARAM_ADDR + PARAM_M0_FUNC)) {
 	case M0_FUNC_SUSPEND:
diff --git a/src/startup.c b/src/startup.c
index 47561fd..d8ef57d 100644
--- a/src/startup.c
+++ b/src/startup.c
@@ -47,7 +47,7 @@ void WEAK svc_handler(void);
 void WEAK pend_sv_handler(void);
 void WEAK systick_handler(void);
 
-extern int main(void);
+extern void m0_main(void);
 
 /* Function prototypes */
 static void default_reset_handler(void);
@@ -88,7 +88,7 @@ void (* const g_pfnVectors[])(void) = {
 static void default_reset_handler(void)
 {
 	/* call the application's entry point */
-	main();
+	m0_main();
 }
 
 /**