Hi Paul,
> * m4/wctype_h.m4 (gl_WCTYPE_H): Likewise.
This part of the patch did something else: It changed an
gl_CHECK_NEXT_HEADERS invocation to gl_NEXT_HEADERS. But this means that
when the <wctype.h> header does not exist, NEXT_WCTYPE_H will not be set,
thus the gnulib-generated wctype.h replacement will contain
#if 0
# include
#endif
I'm not sure that all compilers support this. It's safer to write
#if 0
# include <wctype.h>
#endif
This patch does it.
2011-01-23 Bruno Haible <br...@clisp.org>
wctype: Ensure valid C syntax.
* m4/wctype_h.m4 (gl_WCTYPE_H): Invoke gl_CHECK_NEXT_HEADERS
unconditionally, instead of gl_NEXT_HEADERS conditionally.
--- m4/wctype_h.m4.orig Sun Jan 23 12:31:46 2011
+++ m4/wctype_h.m4 Sat Jan 22 01:44:29 2011
@@ -1,4 +1,4 @@
-# wctype_h.m4 serial 11
+# wctype_h.m4 serial 12
dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
@@ -36,7 +36,6 @@
AC_SUBST([HAVE_ISWBLANK])
AC_SUBST([REPLACE_ISWBLANK])
- AC_CHECK_HEADERS_ONCE([wctype.h])
AC_REQUIRE([AC_C_INLINE])
AC_REQUIRE([gt_TYPE_WINT_T])
@@ -47,6 +46,7 @@
fi
AC_SUBST([HAVE_WINT_T])
+ gl_CHECK_NEXT_HEADERS([wctype.h])
if test $ac_cv_header_wctype_h = yes; then
if test $ac_cv_func_iswcntrl = yes; then
dnl Linux libc5 has an iswprint function that returns 0 for all
arguments.
@@ -75,7 +75,6 @@
])
])
fi
- gl_NEXT_HEADERS([wctype.h])
HAVE_WCTYPE_H=1
else
HAVE_WCTYPE_H=0
