configure: Allow specifying different CFLAGS for the cross compiler.

Makefile.in

@@ -43,6 +43,7 @@ CPPBIN          = @CPPBIN@
 CROSSCC         = @CROSSCC@
 CFLAGS          = @CFLAGS@
 CPPFLAGS        = @CPPFLAGS@
+CROSSCFLAGS     = @CROSSCFLAGS@
 EXTRACFLAGS     = @EXTRACFLAGS@
 MSVCRTFLAGS     = @BUILTINFLAG@
 TARGETFLAGS     = @TARGETFLAGS@

configure

@@ -690,6 +690,7 @@ X_PRE_LIBS
 X_CFLAGS
 XMKMF
 PTHREAD_LIBS
+CROSSCFLAGS
 CROSSCC
 CROSSTARGET
 PRELINK
@@ -9105,6 +9106,8 @@ $as_echo "no" >&6; }
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
         CC="$ac_save_CC"
+        CROSSCFLAGS=${CROSSCFLAGS:-$CFLAGS}
+
     fi
 fi
 

configure.ac

@@ -983,6 +983,7 @@ then
                            done],
                           [AC_MSG_RESULT([no])])
         CC="$ac_save_CC"
+        AC_SUBST(CROSSCFLAGS,${CROSSCFLAGS:-$CFLAGS})
     fi
 fi
 

tools/makedep.c

@@ -2669,7 +2669,7 @@ static struct strarray output_sources( const struct makefile *make )
                 if (make->use_msvcrt) output_filenames( msvcrt_flags );
                 output_filename( "-DWINE_CROSSTEST" );
                 output_filenames( cpp_flags );
-                output_filename( "$(CFLAGS)" );
+                output_filename( "$(CROSSCFLAGS)" );
                 output( "\n" );
             }
             if (make->testdll && !strcmp( ext, "c" ) && !(source->file->flags & FLAG_GENERATED))