[PATCH] base: use --target as target, not uname

[Sergei Trofimovich]

From: Sergei Trofimovich <slyfox at gentoo.org>

Fixed bootstrap failure on linux for --target=mingw32

Signed-off-by: Sergei Trofimovich <slyfox at gentoo.org>
---
 configure.ac | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index b679520..7553a7a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,17 +5,23 @@ AC_CONFIG_SRCDIR([include/HsBase.h])
 
 AC_CONFIG_HEADERS([include/HsBaseConfig.h include/EventConfig.h])
 
+AC_CANONICAL_BUILD
+AC_CANONICAL_HOST
+AC_CANONICAL_TARGET
+
 AC_ARG_WITH([cc],
             [C compiler],
             [CC=$withval])
 AC_PROG_CC()
 
-case `uname -s` in
-    MINGW*|CYGWIN*)
+AC_MSG_CHECKING(for WINDOWS platform)
+case $host in
+    *mingw32*|*cygwin*)
         WINDOWS=YES;;
     *)
         WINDOWS=NO;;
 esac
+AC_MSG_RESULT($WINDOWS)
 
 # do we have long longs?
 AC_CHECK_TYPES([long long])
-- 
1.8.1.2