1 files changed, 45 insertions, 0 deletions
diff --git a/config.c b/config.c
new file mode 100644
index 0000000..51da7db
--- /dev/null
+++ b/config.c
@@ -0,0 +1,45 @@
+#define _POSIX_C_SOURCE 200112L
+#define _FEATURE_CONFIG
+
+#include <stdio.h>
+#include <string.h>
+
+#include "config.h"
+
+#define QUOTE(m) #m
+#define PUT_MACRO(m) \
+	printf("%s-D%s=%s", n++ ? " " : "", #m, QUOTE(m))
+
+int n = 0;
+
+inline void puts_if(const char *s, int c) {
+	if (c)
+		printf("%s%s", n++ ? " " : "", s);
+}
+
+inline void endl() {
+	if (n) {
+		printf("\n");
+		n = 0;
+	}
+}
+
+int main(int argc, char **argv) {
+	int i;
+
+	for (i = 1; i < argc; i++) {
+		if (!strcmp(argv[i], "-D")) {
+			PUT_MACRO(EXIF_SUPPORT);
+			PUT_MACRO(GIF_SUPPORT);
+			endl();
+		} else if (!strcmp(argv[i], "-l")) {
+			puts_if("-lexif", EXIF_SUPPORT);
+			puts_if("-lgif",  GIF_SUPPORT);
+			endl();
+		} else {
+			fprintf(stderr, "%s: invalid argument: %s\n", argv[0], argv[i]);
+			return 1;
+		}
+	}
+	return 0;
+}