[commit: ghc] wip/T11168: Tweak use of AC_USE_SYSTEM_EXTENSIONS (ec70219)

[git at git.haskell.org]

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

On branch  : wip/T11168
Link       : http://ghc.haskell.org/trac/ghc/changeset/ec70219fe3e996b032c7d7095fd4910746747c01/ghc

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

commit ec70219fe3e996b032c7d7095fd4910746747c01
Author: Herbert Valerio Riedel <hvr at gnu.org>
Date:   Sun Dec 6 13:34:34 2015 +0100

    Tweak use of AC_USE_SYSTEM_EXTENSIONS
    
    This is a follow-up to
    7af29da05d2e5a5e311a5f73f20d0f232035973b


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

ec70219fe3e996b032c7d7095fd4910746747c01
 configure.ac                       | 6 +++---
 libraries/base/configure.ac        | 5 ++---
 libraries/integer-gmp/configure.ac | 2 ++
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/configure.ac b/configure.ac
index 57d877a..c8708ae 100644
--- a/configure.ac
+++ b/configure.ac
@@ -58,9 +58,6 @@ dnl  #define SIZEOF_CHAR 0
 dnl recently.
 AC_PREREQ([2.60])
 
-dnl make extensions visible to allow feature-tests to detect them lateron
-AC_USE_SYSTEM_EXTENSIONS
-
 # -------------------------------------------------------------------------
 # Prepare to generate the following header files
 #
@@ -462,6 +459,9 @@ export CC
 MAYBE_OVERRIDE_STAGE0([gcc],[CC_STAGE0])
 MAYBE_OVERRIDE_STAGE0([ar],[AR_STAGE0])
 
+dnl make extensions visible to allow feature-tests to detect them lateron
+AC_USE_SYSTEM_EXTENSIONS
+
 dnl ** figure out how to invoke the C preprocessor (i.e. `gcc -E`)
 AC_PROG_CPP
 
diff --git a/libraries/base/configure.ac b/libraries/base/configure.ac
index 99474a6..5607213 100644
--- a/libraries/base/configure.ac
+++ b/libraries/base/configure.ac
@@ -5,9 +5,6 @@ AC_CONFIG_SRCDIR([include/HsBase.h])
 
 AC_PREREQ([2.60])
 
-dnl make extensions visible to allow feature-tests to detect them lateron
-AC_USE_SYSTEM_EXTENSIONS
-
 AC_CONFIG_HEADERS([include/HsBaseConfig.h include/EventConfig.h])
 
 AC_CANONICAL_BUILD
@@ -18,6 +15,8 @@ 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_MSG_CHECKING(for WINDOWS platform)
 case $host in
diff --git a/libraries/integer-gmp/configure.ac b/libraries/integer-gmp/configure.ac
index 0bd9188..067217e 100644
--- a/libraries/integer-gmp/configure.ac
+++ b/libraries/integer-gmp/configure.ac
@@ -10,6 +10,8 @@ AC_ARG_WITH([cc],
             [C compiler],
             [CC=$withval])
 AC_PROG_CC()
+dnl make extensions visible to allow feature-tests to detect them lateron
+AC_USE_SYSTEM_EXTENSIONS
 
 
 dnl--------------------------------------------------------------------