Changed build to work with both gcc and clang.

.travis.yml

@@ -1,2 +1,7 @@
 language: c
+
+compiler:
+  - clang
+  - gcc
+
 script: make

Makefile

@@ -1,5 +1,4 @@
-CC = gcc
+CCFLAGS = -Wall -Wshadow -O2 -g
-CCFLAGS = -ansi -Wall -Wshadow -O2 -g
 LFLAGS = -lm
 
 

example3.c

@@ -20,7 +20,7 @@ int main(int argc, char *argv[])
     fclose(saved);
 
     if (!ann) {
-        printf("Error loading ANN from file.", save_name);
+        printf("Error loading ANN from file: %s.", save_name);
         exit(1);
     }