> Failures on Cygwin 1.7.2
> ------------------------
>
> test-btowc.c:48: assertion failed
> ./test-btowc1.sh: line 15: 2892 Aborted (core dumped)
> LC_ALL=$LOCALE_FR ./test-btowc${EXEEXT} 1
> FAIL: test-btowc1.sh
>
> test-btowc.c:56: assertion failed
> ./test-btowc2.sh: line 15: 3896 Aborted (core dumped)
> LC_ALL=$LOCALE_FR_UTF8 ./test-btowc${EXEEXT} 2
> FAIL: test-btowc2.sh
These failures are due to btwoc('\0') returning WEOF instead of 0,
even in the "C" locale. This is a bug, because the NUL character is a valid
ASCII character (even a very important one).
I'm adding a workaround:
2010-04-05 Bruno Haible <br...@clisp.org>
btowc: Work around Cygwin 1.7.2 bug.
* m4/btowc.m4 (gl_FUNC_BTOWC): Set REPLACE_BTOWC to 1 if the function
does not map NUL to 0.
* doc/posix-functions/btowc.texi: Mention the Cygwin bug.
--- doc/posix-functions/btowc.texi.orig Tue Apr 6 00:28:05 2010
+++ doc/posix-functions/btowc.texi Tue Apr 6 00:07:25 2010
@@ -12,6 +12,9 @@
This function is missing on some platforms:
HP-UX 11.00, IRIX 5.3, Solaris 2.6, mingw, Interix 3.5.
@item
+This function returns WEOF for a NUL argument on some platforms:
+Cygwin 1.7.2.
+...@item
This function does not return WEOF for an EOF argument on some platforms:
IRIX 6.5.
@end itemize
--- m4/btowc.m4.orig Tue Apr 6 00:28:05 2010
+++ m4/btowc.m4 Tue Apr 6 00:22:27 2010
@@ -1,4 +1,4 @@
-# btowc.m4 serial 5
+# btowc.m4 serial 6
dnl Copyright (C) 2008-2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -18,10 +18,39 @@
HAVE_BTOWC=0
else
- dnl IRIX 6.5 btowc(EOF) is 0xFF, not WEOF.
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([gt_LOCALE_FR])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+ dnl Cygwin 1.7.2 btowc('\0') is WEOF, not 0.
+ AC_CACHE_CHECK([whether btowc(0) is correct],
+ [gl_cv_func_btowc_nul],
+ [
+ AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+#include <wchar.h>
+int main ()
+{
+ if (btowc ('\0') != 0)
+ return 1;
+ return 0;
+}],
+ [gl_cv_func_btowc_nul=yes],
+ [gl_cv_func_btowc_nul=no],
+ [
+changequote(,)dnl
+ case "$host_os" in
+ # Guess no on Cygwin.
+ cygwin*) gl_cv_func_btowc_nul="guessing no" ;;
+ # Guess yes otherwise.
+ *) gl_cv_func_btowc_nul="guessing yes" ;;
+ esac
+changequote([,])dnl
+ ])
+ ])
+
+ dnl IRIX 6.5 btowc(EOF) is 0xFF, not WEOF.
AC_CACHE_CHECK([whether btowc(EOF) is correct],
[gl_cv_func_btowc_eof],
[
@@ -55,6 +84,11 @@
[:])
fi
])
+
+ case "$gl_cv_func_btowc_nul" in
+ *yes) ;;
+ *) REPLACE_BTOWC=1 ;;
+ esac
case "$gl_cv_func_btowc_eof" in
*yes) ;;
*) REPLACE_BTOWC=1 ;;
