ARMC6 keep __user_setup_stackheap symbol when LTO enabled

maciejbocianski · maciejbocianski · commit 783953e5dc82 · 2020-02-04T12:29:53.000+01:00
Fix for the error L6915E: Library reports error: Heap was used, but no heap region was defined
diff --git a/platform/source/mbed_retarget.cpp b/platform/source/mbed_retarget.cpp
@@ -1141,7 +1141,7 @@ extern "C" __value_in_regs struct __argc_argv $Sub$$__rt_lib_init(unsigned heapb
 }
 #endif
 
-extern "C" __value_in_regs struct __initial_stackheap __user_setup_stackheap(uint32_t R0, uint32_t R1, uint32_t R2, uint32_t R3)
+MBED_USED extern "C" __value_in_regs struct __initial_stackheap __user_setup_stackheap(uint32_t R0, uint32_t R1, uint32_t R2, uint32_t R3)
 {
     return _mbed_user_setup_stackheap(R0, R1, R2, R3);
 }

Original file line number	Diff line number	Diff line change
`@@ -1141,7 +1141,7 @@ extern "C" __value_in_regs struct __argc_argv $Sub$$__rt_lib_init(unsigned heapb`
`1141`	`1141`	`}`
`1142`	`1142`	`#endif`
`1143`	`1143`
`1144`		`-extern "C" __value_in_regs struct __initial_stackheap __user_setup_stackheap(uint32_t R0, uint32_t R1, uint32_t R2, uint32_t R3)`
	`1144`	`+MBED_USED extern "C" __value_in_regs struct __initial_stackheap __user_setup_stackheap(uint32_t R0, uint32_t R1, uint32_t R2, uint32_t R3)`
`1145`	`1145`	`{`
`1146`	`1146`	`return _mbed_user_setup_stackheap(R0, R1, R2, R3);`
`1147`	`1147`	`}`