Our libc iconv (unlike gnu iconv and the citrus code in NetBSD) has a

bypass mode when src == dst.  Unfortunately, there are tools in ports
that pass byte streams through iconv to determine if the encodings
are valid.  eg: gettext-0.18.3+.

Disable the optimization and behave like the other implementations.

1 files changed, 13 insertions, 0 deletions

diff --git a/lib/libc/iconv/citrus_iconv.c b/lib/libc/iconv/citrus_iconv.c
index 31cf7df..e4bd24f 100644
--- a/lib/libc/iconv/citrus_iconv.c
+++ b/lib/libc/iconv/citrus_iconv.c
@@ -116,7 +116,20 @@ open_shared(struct _citrus_iconv_shared * __restrict * __restrict rci,
 	size_t len_convname;
 	int ret;
 
+#ifdef INCOMPATIBLE_WITH_GNU_ICONV
+	/*
+	 * Sadly, the gnu tools expect iconv to actually parse the
+	 * byte stream and don't allow for a pass-through when
+	 * the (src,dest) encodings are the same.
+	 * See gettext-0.18.3+ NEWS:
+	 *   msgfmt now checks PO file headers more strictly with less
+	 *   false-positives.
+	 * NetBSD don't do this either.
+	 */
 	module = (strcmp(src, dst) != 0) ? "iconv_std" : "iconv_none";
+#else
+	module = "iconv_std";
+#endif
 
 	/* initialize iconv handle */
 	len_convname = strlen(convname);