diff --git a/src/config.h b/src/config.h
index 73ae37f..a105595 100644
--- a/src/config.h
+++ b/src/config.h
@@ -20,6 +20,17 @@
 #ifndef CONFIG_H
 #define CONFIG_H
 
+#if defined(__linux__)
+#error SEEE! WE ARE ON __linux__
+#endif
+
+#if defined(__GLIBC__)
+#error SEEE! WE ARE ON __GLIBC__
+#endif
+
+#if defined(__GNU__)
+#error SEEE! WE ARE ON __GNU__
+#endif
 
 #if defined(__linux__) || defined(__GLIBC__) || defined(__GNU__)
 
@@ -39,6 +50,8 @@
 
 #elif defined(__MINGW32__)
 
+#error SEEE! WE ARE ON __MINGW32__ WHO WOULDA THUNK
+
 /* enable strdup() declaration in string.h: */
 #define __MISC_VISIBLE 1
 
@@ -55,6 +68,8 @@
 #define _POSIX_SOURCE
 #endif
 
+#error SEEE! WE ARE ON ...else...
+
 #endif
 
 /* enable strdup() declaration in string.h: */