MinGW32 build fixes

After long discussions in IRC we came to conclusion that there is no
elegant way to handle static builds with MinGW32. This patch sets
AC_DISABLE_STATIC by default on MinGW32 and Cygwin
Signed-off-by: Mikko Koppanen <mkoppanen@php.net>

acinclude.m4

+dnl ##############################################################################
+dnl # AC_CONFIG_LIBTOOL                                                          #
+dnl # Configure libtool. $host_os needs to be set before calling this macro      #
+dnl ##############################################################################
+AC_DEFUN([AC_CONFIG_LIBTOOL],  [{
+
+    if test "x${host_os}" = "x"; then
+        AC_MSG_ERROR([AC@&t@_CANONICAL_HOST not called before calling AC@&t@_CONFIG_LIBTOOL])
+    fi
+
+    # Libtool configuration for different targets
+    case "${host_os}" in
+        *mingw32*|*cygwin*)
+            # Disable static build by default
+            AC_DISABLE_STATIC
+        ;;
+        *)
+            # Everything else with static enabled
+            AC_ENABLE_STATIC
+        ;;
+    esac
+
+    AC_LIBTOOL_WIN32_DLL
+    AC_PROG_LIBTOOL
+}])
+
+
 dnl ##############################################################################
 dnl # AC_CHECK_LANG_ICC                                                          #
 dnl # Check if the current language is compiled using ICC                        #

configure.in

@@ -33,11 +33,15 @@ AC_PROG_CC
 AC_PROG_CC_C99
 AC_PROG_CXX
 AM_PROG_CC_C_O
-AC_LIBTOOL_WIN32_DLL
-AC_PROG_LIBTOOL
 AC_PROG_SED
 AC_PROG_AWK
 
+# Host specific checks
+AC_CANONICAL_HOST
+
+# Libtool configuration for different targets. See acinclude.m4
+AC_CONFIG_LIBTOOL
+
 # Check for ICC and Sun Studio compilers
 AC_LANG(C)
 AC_CHECK_LANG_ICC
@@ -82,9 +86,6 @@ werror="yes"
 # Whether we are on mingw or not.
 on_mingw32="no"
 
-# Host speciffic checks
-AC_CANONICAL_HOST
-
 # Set some default features required by 0MQ code.
 CPPFLAGS="-D_REENTRANT -D_THREAD_SAFE $CPPFLAGS"
 
@@ -194,6 +195,10 @@ case "${host_os}" in
         # mingw32 defines __int64_t as long long
         CPPFLAGS="-Wno-long-long ${CPPFLAGS} "
         on_mingw32="yes"
+
+        if test "x$enable_static" = "xyes"; then
+            AC_MSG_ERROR([Building static libraries is not supported under MinGW32])
+        fi
         ;;
     *cygwin*)
         # Define on Cygwin to enable all library features
@@ -204,6 +209,10 @@ case "${host_os}" in
         LDFLAGS="${LDFLAGS} -L/usr/lib/e2fsprogs"
         AC_CHECK_LIB(uuid, uuid_generate, ,
             [AC_MSG_ERROR([cannot link with -luuid, install the e2fsprogs package.])])
+
+        if test "x$enable_static" = "xyes"; then
+            AC_MSG_ERROR([Building static libraries is not supported under Cygwin])
+        fi
         ;;
     *)
         AC_MSG_ERROR([unsupported system: ${host_os}.])