cygwinにcanythingインストールしようとしたらエラー

canything-install-on-cygwin.diff

diff --git a/Makefile b/Makefile
index 11529b8..3a29118 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 canything: canything.c
-	@gcc -Wall -O3 -o $@ $< -lncursesw && echo make canything
+	@gcc -Wall -O3 -o $@ $< -lncursesw -L/usr/include/ncursesw -I/usr/include/ncursesw && echo make canything
 clean:
 	@rm -f canything && echo clean canything
 test: canything
diff --git a/canything.c b/canything.c
index ce915ac..52e3140 100644
--- a/canything.c
+++ b/canything.c
@@ -72,7 +72,7 @@ static void endtty(){
 }
 
 static void strtolower(const char *src, char *dst){
-  char c;
+  unsigned char c;
   while ((c = *src++))
     *dst++ = tolower(c);
   *dst++ = '\0';

canything-make-error

canything.c:5:21: fatal error: ncurses.h: No such file or directory
コンパイルが中断されました。
Makefile:2: recipe for target `canything' failed
make: *** [canything] Error 1