[commit: packages/unix] master: Tweak use of AC_USE_SYSTEM_EXTENSIONS (147630c)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/unix

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/147630c7c76bd9b947524ef140d21b9e81967c6e/unix

>---------------------------------------------------------------

commit 147630c7c76bd9b947524ef140d21b9e81967c6e
Author: Herbert Valerio Riedel <hvr at gnu.org>
Date:   Sun Dec 6 17:06:41 2015 +0100

    Tweak use of AC_USE_SYSTEM_EXTENSIONS
    
    This is a follow-up tweak to
    5740003e06f0c585460501514f3352f5e105c98c
    
    It's better to move AC_USE_SYSTEM_EXTENSIONS
    after `AC_PROG_CC` as this avoids triggering
    edundant tests


>---------------------------------------------------------------

147630c7c76bd9b947524ef140d21b9e81967c6e
 configure.ac | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index 8738680..2c1b1ab 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,16 +1,17 @@
-AC_INIT([Haskell unix package], [2.0], [libraries at haskell.org], [unix])
 AC_PREREQ([2.60])
+AC_INIT([Haskell unix package], [2.0], [libraries at haskell.org], [unix])
 
 # Safety check: Ensure that we are in the correct source directory.
 AC_CONFIG_SRCDIR([include/HsUnix.h])
 
-AC_USE_SYSTEM_EXTENSIONS
-
 AC_ARG_WITH([cc],
             [C compiler],
             [CC=$withval])
 AC_PROG_CC()
 
+dnl make extensions visible to allow feature-tests to detect them lateron
+AC_USE_SYSTEM_EXTENSIONS
+
 AC_CONFIG_HEADERS([include/HsUnixConfig.h])
 
 # Is this a Unix system?