capture compilation flags into binary

CMakeLists.txt

@@ -1,18 +1,23 @@
 cmake_minimum_required(VERSION 2.8)
 project(sdr-server)
-
+set(CMAKE_C_STANDARD 11)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/")
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ffast-math -std=c11")
-if(CMAKE_BUILD_TYPE MATCHES Debug)
-	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} --coverage ")
-endif()
+set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -ffast-math")
+set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} --coverage")
 
 if(NO_MANUAL_SIMD)
 	add_definitions(-DNO_MANUAL_SIMD)
 else()
 	remove_definitions(-DNO_MANUAL_SIMD)
 endif()
 
+if(CMAKE_BUILD_TYPE MATCHES Debug)
+	set(BUILD_COMPILATION_FLAGS "${CMAKE_C_FLAGS_DEBUG}")
+elseif(CMAKE_BUILD_TYPE MATCHES Release)
+	set(BUILD_COMPILATION_FLAGS "${CMAKE_C_FLAGS_RELEASE}")
+endif()
+add_definitions(-DCMAKE_C_FLAGS="${CMAKE_C_FLAGS} ${BUILD_COMPILATION_FLAGS}")
+
 add_library(sdr_serverLib
 		${CMAKE_CURRENT_SOURCE_DIR}/src/config.c
 		${CMAKE_CURRENT_SOURCE_DIR}/src/sdr_device.c

src/main.c

@@ -21,6 +21,7 @@ int main(int argc, char **argv) {
   }
   setvbuf(stdout, NULL, _IOLBF, 0);
   printf("SIMD optimization: %s\n", SIMD_STATUS);
+  printf("compilation flags: %s\n", CMAKE_C_FLAGS);
   struct server_config *server_config = NULL;
   int code = create_server_config(&server_config, argv[1]);
   if (code != 0) {

test/perf_xlating.c

@@ -8,6 +8,7 @@ extern const char *SIMD_STATUS;
 
 int main(void) {
 	printf("SIMD optimization: %s\n", SIMD_STATUS);
+	printf("compilation flags: %s\n", CMAKE_C_FLAGS);
 	uint32_t sampling_freq = 2016000;
 	uint32_t target_freq = 48000;
 	float *taps = NULL;