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From: Michael Forney <mforney@mforney.org>
To: util-linux@vger.kernel.org
Subject: [PATCH 1/4] Use _POSIX_VERSION to determine support for %m
Date: Thu,  3 Oct 2013 02:36:05 -0700	[thread overview]
Message-ID: <1380792968-1176-2-git-send-email-mforney@mforney.org> (raw)
In-Reply-To: <1380792968-1176-1-git-send-email-mforney@mforney.org>

%m is included in POSIX 2008, so we can check if the libc implements
that before failing.
---
 configure.ac | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index cbcda46..95ff8b3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -430,6 +430,7 @@ AC_CACHE_VAL([scanf_cv_alloc_modifier],
 
     [AC_COMPILE_IFELSE([AC_LANG_SOURCE([
      #include <stdio.h>
+     #include <unistd.h>
 
      #ifdef __GLIBC__
 
@@ -437,8 +438,13 @@ AC_CACHE_VAL([scanf_cv_alloc_modifier],
      #error %m is not available
      #endif
 
-     #else
+     #elif defined(_POSIX_VERSION)
 
+     #if _POSIX_VERSION < 200809L
+     #error %m is not available
+     #endif
+
+     #else
      #error Your C-library is not supported.
      #endif
      ])],
-- 
1.8.4


  reply	other threads:[~2013-10-03  9:36 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-10-03  9:36 Various portability fixes Michael Forney
2013-10-03  9:36 ` Michael Forney [this message]
2013-10-03  9:39 ` [PATCH 2/4] Add missing includes Michael Forney
2013-10-03  9:39 ` [PATCH 3/4] Check for type sighandler_t and use if present Michael Forney
2013-10-03  9:39 ` [PATCH 4/4] Fix check for __GNU_LIBRARY__ Michael Forney
2013-10-04 10:30 ` Various portability fixes Karel Zak

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