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-rw-r--r--gnulib-m4/errno_h.m4115
1 files changed, 115 insertions, 0 deletions
diff --git a/gnulib-m4/errno_h.m4 b/gnulib-m4/errno_h.m4
new file mode 100644
index 00000000..4ce1ccbd
--- /dev/null
+++ b/gnulib-m4/errno_h.m4
@@ -0,0 +1,115 @@
+# errno_h.m4 serial 6
+dnl Copyright (C) 2004, 2006, 2008, 2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_HEADER_ERRNO_H],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_CACHE_CHECK([for complete errno.h], [gl_cv_header_errno_h_complete], [
+ AC_EGREP_CPP([booboo],[
+#include <errno.h>
+#if !defined ENOMSG
+booboo
+#endif
+#if !defined EIDRM
+booboo
+#endif
+#if !defined ENOLINK
+booboo
+#endif
+#if !defined EPROTO
+booboo
+#endif
+#if !defined EMULTIHOP
+booboo
+#endif
+#if !defined EBADMSG
+booboo
+#endif
+#if !defined EOVERFLOW
+booboo
+#endif
+#if !defined ENOTSUP
+booboo
+#endif
+#if !defined ESTALE
+booboo
+#endif
+#if !defined ECANCELED
+booboo
+#endif
+ ],
+ [gl_cv_header_errno_h_complete=no],
+ [gl_cv_header_errno_h_complete=yes])
+ ])
+ if test $gl_cv_header_errno_h_complete = yes; then
+ ERRNO_H=''
+ else
+ gl_CHECK_NEXT_HEADERS([errno.h])
+ ERRNO_H='errno.h'
+ fi
+ AC_SUBST([ERRNO_H])
+ gl_REPLACE_ERRNO_VALUE([EMULTIHOP])
+ gl_REPLACE_ERRNO_VALUE([ENOLINK])
+ gl_REPLACE_ERRNO_VALUE([EOVERFLOW])
+])
+
+# Assuming $1 = EOVERFLOW.
+# The EOVERFLOW errno value ought to be defined in <errno.h>, according to
+# POSIX. But some systems (like OpenBSD 4.0 or AIX 3) don't define it, and
+# some systems (like OSF/1) define it when _XOPEN_SOURCE_EXTENDED is defined.
+# Check for the value of EOVERFLOW.
+# Set the variables EOVERFLOW_HIDDEN and EOVERFLOW_VALUE.
+AC_DEFUN([gl_REPLACE_ERRNO_VALUE],
+[
+ if test -n "$ERRNO_H"; then
+ AC_CACHE_CHECK([for ]$1[ value], [gl_cv_header_errno_h_]$1, [
+ AC_EGREP_CPP([yes],[
+#include <errno.h>
+#ifdef ]$1[
+yes
+#endif
+ ],
+ [gl_cv_header_errno_h_]$1[=yes],
+ [gl_cv_header_errno_h_]$1[=no])
+ if test $gl_cv_header_errno_h_]$1[ = no; then
+ AC_EGREP_CPP([yes],[
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+#ifdef ]$1[
+yes
+#endif
+ ], [gl_cv_header_errno_h_]$1[=hidden])
+ if test $gl_cv_header_errno_h_]$1[ = hidden; then
+ dnl The macro exists but is hidden.
+ dnl Define it to the same value.
+ AC_COMPUTE_INT([gl_cv_header_errno_h_]$1, $1, [
+#define _XOPEN_SOURCE_EXTENDED 1
+#include <errno.h>
+/* The following two lines are a workaround against an autoconf-2.52 bug. */
+#include <stdio.h>
+#include <stdlib.h>
+])
+ fi
+ fi
+ ])
+ case $gl_cv_header_errno_h_]$1[ in
+ yes | no)
+ ]$1[_HIDDEN=0; ]$1[_VALUE=
+ ;;
+ *)
+ ]$1[_HIDDEN=1; ]$1[_VALUE="$gl_cv_header_errno_h_]$1["
+ ;;
+ esac
+ AC_SUBST($1[_HIDDEN])
+ AC_SUBST($1[_VALUE])
+ fi
+])
+
+dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
+dnl Remove this when we can assume autoconf >= 2.61.
+m4_ifdef([AC_COMPUTE_INT], [], [
+ AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
+])