diff --git a/makefile b/makefile
index 2f4e314..5f017cd 100644
--- a/makefile
+++ b/makefile
@@ -1,8 +1,5 @@
 sudokuloeser: sudokuloeser.c
-	gcc -Wall -pedantic -lrt sudokuloeser.c -o sudokuloeser
+	gcc -Wall -pedantic -O3 -lrt sudokuloeser.c -o sudokuloeser
 
 windows: sudokuloeser.c
-	i486-mingw32-gcc -Wall -pedantic sudokuloeser.c -o sudokuloeser.exe
-
-win: sudokuloeser.c
-	i586-mingw32msvc-gcc -Wall -pedantic sudokuloeser.c -o sudokuloeser.exe
+	sh -c '[ -x /usr/bin/i486-mingw32-gcc ] && i486-mingw32-gcc -Wall -pedantic sudokuloeser.c -o sudokuloeser.exe || [ -x /usr/bin/i586-mingw32msvc-gcc ] && i586-mingw32msvc-gcc -Wall -pedantic sudokuloeser.c -o sudokuloeser.exe || echo "Compiler not found"'