[dia] mingw: configure changes

[Hans Breuer <hans src gnome org>]

commit 0bc2c4004b431b026dd4280df659a1bba4ccde6f
Author: Fridrich Å trba <fridrich strba bluewin ch>
Date:   Sun Aug 29 16:26:02 2010 +0200

    mingw: configure changes
    
    [PATCH 1/6] Make configure succeed with autotools
    and mingw and set useful defines
    
    Signed-off-by: Hans Breuer <hans breuer org>

 configure.in |   65 +++++++++++++++++++++++++++++++++++++--------------------
 1 files changed, 42 insertions(+), 23 deletions(-)
---
diff --git a/configure.in b/configure.in
index abdf56f..5cc3738 100644
--- a/configure.in
+++ b/configure.in
@@ -11,6 +11,22 @@ AC_REVISION($Revision: 1.288 $)
 dnl Specify a header configuration file
 AM_CONFIG_HEADER(config.h)
 
+AC_CANONICAL_HOST
+
+case "$host" in
+  *-*-mingw*)
+    os_win32=yes
+    NO_UNDEFINED=-no-undefined
+    ;;
+  *)
+    os_win32=no
+    NO_UNDEFINED=
+    ;;
+esac
+AC_MSG_RESULT([$os_win32])
+AM_CONDITIONAL(OS_WIN32, test "$os_win32" = "yes")
+AC_SUBST(NO_UNDEFINED)
+
 dnl do this check now, to keep autogen quiet.
 AC_PROG_CC
 dnl also c++
@@ -402,30 +418,33 @@ LIBS="${LIBS} ${Z_LIBS}"
 dnl Path to UI resources
 AC_SUBST(uidatadir, '${pkgdatadir}/ui')
 
-
 dnl Platform-specific fixes.
-dnl 
-
-dnl Sun Forte C provides isinf() in the unbundled -lsunmath. Solaris
-dnl declares finite() in ieeefp.h. It's preferrable not to link 
-dnl to -lsunmath as it's not present on all machines.
-have_isinf=no
-AC_CHECK_HEADERS(math.h,
-        AC_CHECK_LIB(m,isinf,
-                have_isinf=yes))
-
-if test "$have_isinf" = "no"; then
-    AC_CHECK_HEADER(ieeefp.h,
-             [AC_CHECK_FUNC(finite, 
-	               AC_DEFINE(HAVE_IEEEFP_H,1,
-		                 [Define if finite() is defined in ieeefp.h]),
-                       AC_MSG_ERROR([Can't find a definition of neither 
-                                     finite nor isinf]))],
-             [AC_MSG_ERROR(Can't find neither a definition of
-	                   isinf nor ieeefp.h)])
-else
-    AC_DEFINE([HAVE_ISINF], 1, 
-              [Define if the isinf() function is available])
+dnl
+
+if test "$os_win32" = "no"; then
+
+  dnl Sun Forte C provides isinf() in the unbundled -lsunmath. Solaris
+  dnl declares finite() in ieeefp.h. It's preferrable not to link
+  dnl to -lsunmath as it's not present on all machines.
+  have_isinf=no
+  AC_CHECK_HEADERS(math.h,
+          AC_CHECK_LIB(m,isinf,
+                  have_isinf=yes))
+
+  if test "$have_isinf" = "no"; then
+      AC_CHECK_HEADER(ieeefp.h,
+               [AC_CHECK_FUNC(finite,
+                         AC_DEFINE(HAVE_IEEEFP_H,1,
+                                 [Define if finite() is defined in ieeefp.h]),
+                         AC_MSG_ERROR([Can't find a definition of neither
+                                       finite nor isinf]))],
+               [AC_MSG_ERROR(Can't find neither a definition of
+	                     isinf nor ieeefp.h)])
+  else
+      AC_DEFINE([HAVE_ISINF], 1,
+                [Define if the isinf() function is available])
+  fi
+
 fi
 
 dnl Alpha needs -mieee or we get a segfault