From 7bfa88f315d71c7f7a1b76fcec3886c7506aca24 Mon Sep 17 00:00:00 2001
From: Rob Landley
Date: Mon, 13 Feb 2006 19:16:41 +0000
Subject: New USE() macros

For each CONFIG_SYMBOL, include/bb_config.h now has both ENABLE_SYMBOL
and USE_SYMBOL(x).  ENABLE_SYMBOL is still always defined (1 or 0) so that
if(ENABLE) should optimize out when it's zero.  The USE_SYMBOL(X) will only
splice in X if the symbol is defined, otherwise it'll be empty.

Thus we can convert this:

#ifdef CONFIG_ARGS
    opt = bb_getopt_ulflags(argc, argv, "ab:c"
#ifdef CONFIG_THINGY
        "d:"
#endif
        , &bvalue
#ifdef CONFIG_THINGY
        , &thingy
#endif
    );
#endif

into this:
    if (ENABLE_ARGS) {
        opt = bb_getopt_ulflags(argc, argv, "ab:c" USE_THINGY("d:"), &bvalue
                USE_THINGY(, &thingy));
    }

And it should produce the same code.

Unlike the old versions in include/_usage.h, the new USE_SYMBOL(x) can handle
commas in its arguments (as shown above).  (The _usage.h file is obsolete and
no longer generated.)

Nobody should need to include config.h directly anymore, bb_config.h should
define all the configuration stuff we need.  Someday, the CONFIG_SYMBOL
versions should go away in favor of ENABLE_SYMBOL and USE_SYMBOL().

Thanks to vodz for the new version of bb_mkdep.c that works with function
macros.
---
 include/platform.h | 5 -----
 1 file changed, 5 deletions(-)

(limited to 'include')

diff --git a/include/platform.h b/include/platform.h
index 773d6b8..68c7abb 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -78,9 +78,4 @@
 # endif
 #endif
 
-
-/* include USAGE_APPLET_x helper macros for usage.h.  */
-/*
-#include "_usage.h"
-*/
 #endif	/* platform.h	*/
-- 
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