Merge pull request #587 from danielinux/cmake-fix-stm32h7

Fixed build with Cmake on STM32H7 with TEST_APPS.

Author: kareem-wolfssl

test-app/CMakeLists.txt

@@ -126,7 +126,7 @@ if(BUILD_TEST_APPS)
     if(WOLFBOOT_TARGET STREQUAL "sim")
         target_link_options(image PRIVATE -Wl,-gc-sections -Wl,-Map=image.map)
     else()
-        target_link_options(image PRIVATE -T${APP_LSCRIPT} -Wl,-gc-sections -Wl,-Map=image.map)
+        target_link_options(image PRIVATE -T${APP_LSCRIPT} -Wl,-gc-sections -Wl,-Map=image.map -ffreestanding -nostartfiles)
     endif()
 
     if(WOLFBOOT_TARGET IN_LIST ARM_TARGETS)

test-app/startup_arm.c

@@ -31,6 +31,8 @@ extern unsigned int _start_heap;
 
 #ifdef TARGET_stm32f4
 extern void isr_tim2(void);
+#else
+#define isr_tim2 isr_empty
 #endif
 
 #ifdef TARGET_stm32h5