--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,6 @@ set(CMAKE_BUILD_TYPE "Debug")
 #set(CMAKE_BUILD_TYPE "Release")
 
 #set(CMAKE_C_FLAGS "-Wall -Wextra --pedantic -Wno-strict-aliasing")
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D__FILENAME__='\"$(notdir $<)\"'")
 set(CMAKE_C_FLAGS_DEBUG "-g")
 set(CMAKE_C_FLAGS_RELEASE "-O2")
 
--- a/src/logging.h
+++ b/src/logging.h
@@ -34,6 +34,20 @@ enum _LogSeverity {
   LOG_FATAL = 4,
 };
 
+#define STRIPPATH(s)\
+    (sizeof(s) > 2 && (s)[sizeof(s)-2] == '/' ? (s) + sizeof(s) - 1 : \
+    sizeof(s) > 3 && (s)[sizeof(s)-3] == '/' ? (s) + sizeof(s) - 2 : \
+    sizeof(s) > 4 && (s)[sizeof(s)-4] == '/' ? (s) + sizeof(s) - 3 : \
+    sizeof(s) > 5 && (s)[sizeof(s)-5] == '/' ? (s) + sizeof(s) - 4 : \
+    sizeof(s) > 6 && (s)[sizeof(s)-6] == '/' ? (s) + sizeof(s) - 5 : \
+    sizeof(s) > 7 && (s)[sizeof(s)-7] == '/' ? (s) + sizeof(s) - 6 : \
+    sizeof(s) > 8 && (s)[sizeof(s)-8] == '/' ? (s) + sizeof(s) - 7 : \
+    sizeof(s) > 9 && (s)[sizeof(s)-9] == '/' ? (s) + sizeof(s) - 8 : \
+    sizeof(s) > 10 && (s)[sizeof(s)-10] == '/' ? (s) + sizeof(s) - 9 : \
+    sizeof(s) > 11 && (s)[sizeof(s)-11] == '/' ? (s) + sizeof(s) - 10 : (s))
+
+#define __FILENAME__ STRIPPATH(__FILE__)
+
 // Debug, Info, Warning, Error logging.
 #define DLOG(...) _log(__FILENAME__, __LINE__, LOG_DEBUG, __VA_ARGS__)
 #define ILOG(...) _log(__FILENAME__, __LINE__, LOG_INFO, __VA_ARGS__)