apps,hello: display ISA info

Makefile.compile

@@ -28,7 +28,7 @@ ISA_DEF = __ISA_$(shell echo $(ISA) | tr a-z A-Z)__
 INCLUDES  = $(addprefix -I, $(INC_DIR)) -I$(AM_HOME)/am/
 INCLUDES += -I$(AM_HOME)/am/arch/$(ARCH)/include
 
-CFLAGS_COMMON += -O2 -MMD -Wall -Werror -ggdb $(INCLUDES) -D$(ISA_DEF) \
+CFLAGS_COMMON += -O2 -MMD -Wall -Werror -ggdb $(INCLUDES) -D$(ISA_DEF) -D__ISA__=\"$(ISA)\" \
                  -fno-builtin -fno-stack-protector
 CFLAGS   += -std=gnu11
 CXXFLAGS += -std=c++11 -ffreestanding -fno-rtti -fno-exceptions

apps/hello/hello.c

@@ -7,7 +7,7 @@ void print(const char *s) {
 }
 int main() {
   for (int i = 0; i < 10; i ++) {
-    print("Hello World!\n");
+    print("Hello World from a(n) " __ISA__ " program!\n");
   }
   return 0;
 }