Fix unused function warning w/o changing compiler flags.

We have way too many different build systems.

llvm-svn: 184409

compiler-rt/lib/sanitizer_common/tests/CMakeLists.txt

@@ -32,8 +32,7 @@ set(SANITIZER_TEST_CFLAGS_COMMON
   -I${COMPILER_RT_SOURCE_DIR}/lib/sanitizer_common
   -DGTEST_HAS_RTTI=0
   -O2 -g -fno-rtti
-  -Wall -Werror -Werror=sign-compare
-  -Wno-unused-function)
+  -Wall -Werror -Werror=sign-compare)
 
 set(SANITIZER_TEST_LINK_FLAGS_COMMON
   -lstdc++ -ldl)

compiler-rt/lib/sanitizer_common/tests/sanitizer_ioctl_test.cc

@@ -42,7 +42,12 @@ using namespace __sanitizer;
 #include "sanitizer_common/sanitizer_common_interceptors_ioctl.inc"
 
 static struct IoctlInit {
-  IoctlInit() { ioctl_init(); }
+  IoctlInit() {
+    ioctl_init();
+    // Avoid unused function warnings.
+    (void)&ioctl_common_pre;
+    (void)&ioctl_common_post;
+  }
 } ioctl_static_initializer;
 
 TEST(SanitizerIoctl, Fixup) {