examples/elf: add support for CONFIG_DISABLE_SIGNALS

make the example elf can work with SIGNAL disabled

Signed-off-by: v-tangmeng <[email protected]>

Author: TangMeng12

examples/elf/main/elf_main.c

@@ -136,7 +136,9 @@ const char *dirlist[] =
 {
   "errno",
   "hello",
+#ifndef CONFIG_DISABLE_SIGNALS
   "signal",
+#endif
   "struct",
 #ifdef CONFIG_HAVE_CXX
   "hello++1",

examples/elf/tests/Make.defs

@@ -21,7 +21,9 @@
 ifeq ($(CONFIG_EXAMPLES_ELF),y)
   CONFIGURED_APPS += $(APPDIR)/examples/elf/tests/errno
   CONFIGURED_APPS += $(APPDIR)/examples/elf/tests/hello
-  CONFIGURED_APPS += $(APPDIR)/examples/elf/tests/signal
+  ifneq ($(CONFIG_DISABLE_SIGNALS),y)
+    CONFIGURED_APPS += $(APPDIR)/examples/elf/tests/signal
+  endif
   CONFIGURED_APPS += $(APPDIR)/examples/elf/tests/struct
   ifeq ($(CONFIG_HAVE_CXX),y)
     CONFIGURED_APPS += $(APPDIR)/examples/elf/tests/helloxx