__CONCAT does token pasting, not string concatnation. if something like:
__CONCAT("foo","bar"); actually works to concantate strings, it's because the preprocessor expands it into "foo""bar" as separate strings, and then ANSI string concatenation is performed on that. It's more straightforward to just use ANSI string concatenation directly, and newer GCCs complain (rightly) about misuse of token pasting.
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30b3e4f5c7
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@ -1,4 +1,4 @@
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/* $NetBSD: calendar.c,v 1.23 2000/11/29 15:29:51 christos Exp $ */
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/* $NetBSD: calendar.c,v 1.24 2000/12/20 01:03:16 cgd Exp $ */
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/*
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* Copyright (c) 1989, 1993, 1994
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@ -43,7 +43,7 @@ __COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
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#if 0
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static char sccsid[] = "@(#)calendar.c 8.4 (Berkeley) 1/7/95";
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#endif
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__RCSID("$NetBSD: calendar.c,v 1.23 2000/11/29 15:29:51 christos Exp $");
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__RCSID("$NetBSD: calendar.c,v 1.24 2000/12/20 01:03:16 cgd Exp $");
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#endif /* not lint */
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#include <sys/param.h>
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@ -344,7 +344,7 @@ opencal()
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(void)close(pdes[1]);
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}
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(void)close(pdes[0]);
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execl(_PATH_CPP, "cpp", "-P", "-I.", __CONCAT("-I",_PATH_CALENDARS), NULL);
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execl(_PATH_CPP, "cpp", "-P", "-I.", "-I" _PATH_CALENDARS, NULL);
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warn("execl: %s", _PATH_CPP);
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_exit(1);
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}
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