Fix some warnings and wrong console output on Linux

CMakeLists.txt

@@ -59,7 +59,7 @@ if (CMAKE_COMPILER_IS_GNUCC)
     endif()
 
     if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 7.0)
-        set(CMAKE_C_FLAGS "-Walloc-zero -Wdouble-promotion -Wduplicated-branches -Wduplicated-cond -Wformat=2 -Wformat-signedness -Winit-self -Wlogical-op -Wmissing-declarations -Wmissing-prototypes -Wshadow -Wundef -Wunused-macros -Wwrite-strings ${CMAKE_C_FLAGS}")
+        set_source_files_properties(${SOURCE_FILES} PROPERTIES COMPILE_FLAGS "-Walloc-zero -Wdouble-promotion -Wduplicated-branches -Wduplicated-cond -Wformat=2 -Wformat-signedness -Winit-self -Wlogical-op -Wmissing-declarations -Wmissing-prototypes -Wshadow -Wundef -Wunused-macros -Wwrite-strings")
     endif()
 elseif(CMAKE_C_COMPILER_ID STREQUAL "Clang" AND "${CMAKE_BUILD_TYPE}" MATCHES "Debug" AND NOT ${TARGET_PLATFORM} STREQUAL "android")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=undefined")
@@ -797,8 +797,13 @@ endif()
 
 if(MSVC)
     add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
-    string(REGEX REPLACE "/W3" "/W4" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /utf-8 /wd4100 /wd4244 /wd4131")
+    string(REGEX REPLACE "/W3" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
+    set_source_files_properties(${EXPAT_FILES} PROPERTIES COMPILE_FLAGS "/W3")
+    set_source_files_properties(${PNG_FILES} PROPERTIES COMPILE_FLAGS "/W3")
+    set_source_files_properties(${ZLIB_FILES} PROPERTIES COMPILE_FLAGS "/W3")
+    set_source_files_properties(${SOURCE_FILES} PROPERTIES COMPILE_FLAGS "/W4")
+    set_source_files_properties(${PROJECT_SOURCE_DIR}/res/augustus.rc PROPERTIES COMPILE_FLAGS "")
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /utf-8 /wd4100 /wd4244")
 endif()
 
 # Show debug info on crash on 32 bit builds compiled with MinGW

src/platform/augustus.c

@@ -82,7 +82,7 @@ static void write_log(void *userdata, int category, SDL_LogPriority priority, co
 #if defined(_MSC_VER) && !defined(NDEBUG)
     OutputDebugStringA(log_text);
 #else
-    write_to_output(stdout, message);
+    write_to_output(stdout, log_text);
 #endif
 }