MinGW: Fix winldap.h detection (#2010)

<winldap.h> requires <windows.h> to be previously
included in order to compile.

    configure:38466: checking for winldap.h
    wincrypt.h:5051:254: error: 'PSYSTEMTIME' has not been declared

diff --git a/configure.ac b/configure.ac
index cc6393b79036e94146ce5aa55aa8786d59bf2361..650d0b978307e1f48d9945415459ad609b9db70d 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1185,7 +1185,11 @@ SQUID_CHECK_LIB_WORKS(ldap,[
     dnl On MinGW OpenLDAP is not available, try Windows LDAP libraries
     dnl TODO: use AC_CHECK_LIB
     LIBLDAP_LIBS="-lwldap32"
-    AC_CHECK_HEADERS(winldap.h)
+    AC_CHECK_HEADERS([windows.h winldap.h],,,[
+      #if HAVE_WINDOWS_H
+      #include <windows.h>
+      #endif
+    ])
   ])
   AC_CHECK_HEADERS(ldap.h lber.h)
   AC_CHECK_HEADERS(mozldap/ldap.h)