tests/tcg: compile system emulation tests as freestanding

System emulation tests do not run in a hosted environment, since they
do not link with libc.  They should only use freestanding headers
(float.h, limits.h, stdarg.h, stddef.h, stdbool.h, stdint.h,
stdalign.h, stdnoreturn.h) and should be compiled with -ffreestanding
in order to use the compiler implementation of those headers
rather than the one in libc.

Some tests are using inttypes.h instead of stdint.h, so fix that.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

tests/tcg/Makefile.target

@@ -111,6 +111,7 @@ else
 # For softmmu targets we include a different Makefile fragement as the
 # build options for bare programs are usually pretty different. They
 # are expected to provide their own build recipes.
+EXTRA_CFLAGS += -ffreestanding
 -include $(SRC_PATH)/tests/tcg/minilib/Makefile.target
 -include $(SRC_PATH)/tests/tcg/multiarch/system/Makefile.softmmu-target
 -include $(SRC_PATH)/tests/tcg/$(TARGET_NAME)/Makefile.softmmu-target

tests/tcg/aarch64/system/pauth-3.c

@@ -1,4 +1,4 @@
-#include <inttypes.h>
+#include <stdint.h>
 #include <minilib.h>
 
 int main()

tests/tcg/aarch64/system/semiconsole.c

@@ -6,7 +6,7 @@
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
-#include <inttypes.h>
+#include <stdint.h>
 #include <minilib.h>
 
 #define SYS_READC 0x7

tests/tcg/aarch64/system/semiheap.c

@@ -6,7 +6,7 @@
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 
-#include <inttypes.h>
+#include <stdint.h>
 #include <stddef.h>
 #include <minilib.h>
 

tests/tcg/multiarch/system/memory.c

@@ -12,7 +12,7 @@
  *   - sign extension when loading
  */
 
-#include <inttypes.h>
+#include <stdint.h>
 #include <stdbool.h>
 #include <minilib.h>