fix FreeBSD build and clean up some related mess

src/CMakeLists.txt

@@ -417,52 +417,52 @@ if(MSVC)
 	endif(BUILD_SERVER)
 
 else()
+	set(CFLAGS "-fwrapv -fno-fast-math")
+	set(OPT_CFLAGS "-O3 -fomit-frame-pointer")
+
+	if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+		set(CFLAGS "${CFLAGS} -I/usr/local/include") 
+		set(CXXFLAGS "-std=gnu++98")
+		set(LDFLAGS "${LDFLAGS} -L/usr/local/include")
+	endif()
+
 	if(APPLE)
 		set(CMAKE_OSX_ARCHITECTURES x86_64 FORCE)
 		set(ARCH x86_64)
 	endif()
 
-	set(SAFETY_FLAGS "-fwrapv -fno-fast-math")
-	if(MINGW)
-		set(SAFETY_LDFLAGS "")
-	else()
-		set(SAFETY_LDFLAGS "-Wl,-z,relro,-z,now")
-	endif()
-	set(OPT_FLAGS "-O3 -fomit-frame-pointer")
-	set(OPT_LDFLAGS "-Wl,-O1,--sort-common,-s")
-
 	if(ENABLE_SSP)
 		CHECK_CXX_COMPILER_FLAG("-fstack-protector-strong" HAS_FSTACK_STRONG)
 		if(HAS_FSTACK_STRONG)
-			set(SAFETY_FLAGS "${SAFETY_FLAGS} -fstack-protector-strong")
+			set(CFLAGS "${CFLAGS} -fstack-protector-strong")
 		else()
-			set(SAFETY_FLAGS "${SAFETY_FLAGS} -fstack-protector")
+			set(CFLAGS "${CFLAGS} -fstack-protector")
 		endif()
 	endif()
 	if(ENABLE_SAFESTACK)
 		CHECK_CXX_COMPILER_FLAG("-fsanitize=safe-stack" HAS_SAFESTACK)
 		if(HAS_SAFESTACK)
-			set(SAFETY_FLAGS "${SAFETY_FLAGS} -fsanitize=safe-stack")
-			set(SAFETY_LDFLAGS "${SAFETY_LDFLAGS} -fsanitize=safe-stack -lrt")
+			set(CFLAGS "${CFLAGS} -fsanitize=safe-stack")
+			set(LDFLAGS "${LDFLAGS} -fsanitize=safe-stack -lrt")
 		endif()
 	endif()
 	if(ENABLE_PIE)
-		set(SAFETY_FLAGS "${SAFETY_FLAGS} -fPIC -fPIE")
-		set(SAFETY_LDFLAGS "${SAFETY_LDFLAGS} -Wl,-pie")
+		set(CFLAGS "${CFLAGS} -fPIC -fPIE")
+		set(LDFLAGS "${LDFLAGS} -Wl,-pie")
 	endif()
 	if(CPU_OPTS)
-		set(OPT_FLAGS "${OPT_FLAGS} -march=${CPUTYPE}")
+		set(OPT_CFLAGS "${OPT_CFLAGS} -march=${CPUTYPE}")
 	endif()
 
-	set(CMAKE_CXX_FLAGS_RELEASE "${OPT_FLAGS} ${SAFETY_FLAGS} -Wall -DNDEBUG -pipe -fpermissive -Wno-write-strings")
-	set(CMAKE_C_FLAGS_RELEASE "${OPT_FLAGS} ${SAFETY_FLAGS} -Wall -DNDEBUG -pipe")
-	set(CMAKE_CXX_FLAGS_DEBUG "${SAFETY_FLAGS} -Wall -O0 -g3 -ggdb -fpermissive -Wno-write-strings")
-	set(CMAKE_C_FLAGS_DEBUG "${SAFETY_FLAGS} -Wall -O0 -g3 -ggdb")
+	set(CMAKE_CXX_FLAGS_RELEASE "${OPT_CFLAGS} ${CFLAGS} ${CXXFLAGS} -Wall -DNDEBUG -pipe -fpermissive -Wno-write-strings")
+	set(CMAKE_C_FLAGS_RELEASE "${OPT_CFLAGS} ${CFLAGS} -Wall -DNDEBUG -pipe")
+	set(CMAKE_CXX_FLAGS_DEBUG "${CFLAGS} ${CXXFLAGS} -Wall -O0 -g3 -ggdb -fpermissive -Wno-write-strings")
+	set(CMAKE_C_FLAGS_DEBUG "${CFLAGS} -Wall -O0 -g3 -ggdb")
 
-	set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${OPT_LDFLAGS} ${SAFETY_LDFLAGS}")
+	set(CMAKE_EXE_LINKER_FLAGS_RELEASE ${LDFLAGS})
 	set(CMAKE_MODULE_LINKER_FLAGS_RELEASE ${CMAKE_EXE_LINKER_FLAGS_RELEASE})
 	set(CMAKE_SHARED_LINKER_FLAGS_RELEASE ${CMAKE_EXE_LINKER_FLAGS_RELEASE})
-	set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${SAFETY_LDFLAGS}")
+	set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${LDFLAGS}")
 	set(CMAKE_MODULE_LINKER_FLAGS_DEBUG ${CMAKE_EXE_LINKER_FLAGS_DEBUG})
 	set(CMAKE_SHARED_LINKER_FLAGS_DEBUG ${CMAKE_EXE_LINKER_FLAGS_DEBUG})