use restrict everywhere it's required by c99 and/or posix 2008
to deal with the fact that the public headers may be used with pre-c99
compilers, __restrict is used in place of restrict, and defined
appropriately for any supported compiler. we also avoid the form
[restrict] since older versions of gcc rejected it due to a bug in the
original c99 standard, and instead use the form *restrict.
diff --git a/include/iconv.h b/include/iconv.h
index f2ccaf8..cef06f6 100644
--- a/include/iconv.h
+++ b/include/iconv.h
@@ -5,6 +5,12 @@
extern "C" {
#endif
+#if __STDC_VERSION__ >= 199901L
+#define __restrict restrict
+#elif !defined(__GNUC__)
+#define __restrict
+#endif
+
#define __NEED_size_t
#include <bits/alltypes.h>
@@ -12,7 +18,7 @@
typedef void *iconv_t;
iconv_t iconv_open(const char *, const char *);
-size_t iconv(iconv_t, char **, size_t *, char **, size_t *);
+size_t iconv(iconv_t, char **__restrict, size_t *__restrict, char **__restrict, size_t *__restrict);
int iconv_close(iconv_t);
#ifdef __cplusplus