cmake,common/Compiler: add USE_COMPILER_INTRINSICS and USE_COMPILER_C…

…USTOMIZATION CMake options

This introduces USE_COMPILER_INTRINSICS and
USE_COMPILER_CUSTOMIZATION CMake options.
They are enabled by default.

Disabling USE_COMPILER_INTRINSICS is meant
to test generic fallback implementations.

Disabling USE_COMPILER_CUSTOMIZATION is meant
to test the unknown compiler fallback definitions.

cmake/DaemonFlags.cmake

@@ -29,6 +29,26 @@ include(CheckCXXCompilerFlag)
 
 add_definitions(-DDAEMON_BUILD_${CMAKE_BUILD_TYPE})
 
+option(USE_COMPILER_INTRINSICS "Enable usage of compiler intrinsics" ON)
+mark_as_advanced(USE_COMPILER_INTRINSICS)
+
+if (USE_COMPILER_INTRINSICS)
+    add_definitions(-DDAEMON_USE_COMPILER_INTRINSICS=1)
+    message(STATUS "Enabling compiler intrinsics")
+else()
+    message(STATUS "Disabling compiler intrinsics")
+endif()
+
+option(USE_COMPILER_CUSTOMIZATION "Enable usage of compiler custom attributes and operators" ON)
+mark_as_advanced(USE_COMPILER_CUSTOMIZATION)
+
+if (USE_COMPILER_CUSTOMIZATION)
+    add_definitions(-DDAEMON_USE_COMPILER_CUSTOMIZATION=1)
+    message(STATUS "Enabling compiler custom attributes and operators")
+else()
+    message(STATUS "Disabling compiler custom attributes and operators")
+endif()
+
 # Set flag without checking, optional argument specifies build type
 macro(set_c_flag FLAG)
     if (${ARGC} GREATER 1)

src/common/Compiler.h

@@ -41,14 +41,14 @@ int CountTrailingZeroes(unsigned int x);
 int CountTrailingZeroes(unsigned long x);
 int CountTrailingZeroes(unsigned long long x);
 
-#if defined(DAEMON_USE_ARCH_INTRINSICS) && defined(__GNUC__)
+#if defined(DAEMON_USE_COMPILER_INTRINSICS) && defined(__GNUC__)
 	inline int CountTrailingZeroes(unsigned int x)
 		{ return __builtin_ctz(x); }
 	inline int CountTrailingZeroes(unsigned long x)
 		{ return __builtin_ctzl(x); }
 	inline int CountTrailingZeroes(unsigned long long x)
 		{ return __builtin_ctzll(x); }
-#elif defined(DAEMON_USE_ARCH_INTRINSICS) && defined(_MSC_VER)
+#elif defined(DAEMON_USE_COMPILER_INTRINSICS) && defined(_MSC_VER)
 	inline int CountTrailingZeroes(unsigned int x)
 		{ unsigned long ans; _BitScanForward(&ans, x); return ans; }
 	inline int CountTrailingZeroes(unsigned long x)
@@ -117,7 +117,7 @@ int CountTrailingZeroes(unsigned long long x);
 #endif
 
 // GCC and Clang attribute and operator customization.
-#if defined(__GNUC__)
+#if defined(DAEMON_USE_COMPILER_CUSTOMIZATION) && defined(__GNUC__)
 
 // Emit a nice warning when a function is used
 #define DEPRECATED __attribute__((__deprecated__))
@@ -199,7 +199,7 @@ See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0627r0.pdf */
 #endif
 
 // Microsoft Visual C++ attribute and operator customization.
-#elif defined(_MSC_VER)
+#elif defined(DAEMON_USE_COMPILER_CUSTOMIZATION) && defined(_MSC_VER)
 
 // See descriptions above
 #define DEPRECATED __declspec(deprecated)
@@ -230,6 +230,7 @@ See http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0627r0.pdf */
 #define WARN_UNUSED_RESULT
 #define COLD
 #define NORETURN
+#define NORETURN_PTR
 #define PRINTF_LIKE(n)
 #define VPRINTF_LIKE(n)
 #define PRINTF_TRANSLATE_ARG(a)