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symcat.h: Honor autoconf macro HAVE_STRINGIZE.

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* symcat.h: Honor autoconf macro HAVE_STRINGIZE.  Add
        comments/caveats with regard to traditional C behavior.

From-SVN: r33209
This commit is contained in:
Kaveh R. Ghazi 2000-04-17 14:48:13 +00:00 committed by Kaveh Ghazi
parent 01b2995f8b
commit 130bfbdd7a
2 changed files with 15 additions and 1 deletions
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5
include/ChangeLog
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@ -1,3 +1,8 @@
2000-04-17 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* symcat.h: Honor autoconf macro HAVE_STRINGIZE. Add
comments/caveats with regard to traditional C behavior.
2000-04-05 Richard Henderson <rth@cygnus.com> 2000-04-05 Richard Henderson <rth@cygnus.com>
* splay-tree.h (splay_tree_remove): Declare. * splay-tree.h (splay_tree_remove): Declare.

11
include/symcat.h
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@ -19,12 +19,16 @@
#ifndef SYM_CAT_H #ifndef SYM_CAT_H
#define SYM_CAT_H #define SYM_CAT_H
#if defined (__STDC__) || defined (ALMOST_STDC) #if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE)
#define CONCAT2(a,b) a##b #define CONCAT2(a,b) a##b
#define CONCAT3(a,b,c) a##b##c #define CONCAT3(a,b,c) a##b##c
#define CONCAT4(a,b,c,d) a##b##c##d #define CONCAT4(a,b,c,d) a##b##c##d
#define STRINGX(s) #s #define STRINGX(s) #s
#else #else
/* Note one should never pass extra whitespace to the CONCATn macros,
e.g. CONCAT2(foo, bar) because traditonal C will keep the space between
the two labels instead of concatenating them. Instead, make sure to
write CONCAT2(foo,bar). */
#define CONCAT2(a,b) a/**/b #define CONCAT2(a,b) a/**/b
#define CONCAT3(a,b,c) a/**/b/**/c #define CONCAT3(a,b,c) a/**/b/**/c
#define CONCAT4(a,b,c,d) a/**/b/**/c/**/d #define CONCAT4(a,b,c,d) a/**/b/**/c/**/d
@ -35,6 +39,11 @@
#define XCONCAT3(a,b,c) CONCAT3(a,b,c) #define XCONCAT3(a,b,c) CONCAT3(a,b,c)
#define XCONCAT4(a,b,c,d) CONCAT4(a,b,c,d) #define XCONCAT4(a,b,c,d) CONCAT4(a,b,c,d)
/* Note the layer of indirection here is typically used to allow
stringification of the expansion of macros. I.e. "#define foo
bar", "XSTRING(foo)", to yield "bar". Be aware that this only
works for __STDC__, not for traditional C which will still resolve
to "foo". */
#define XSTRING(s) STRINGX(s) #define XSTRING(s) STRINGX(s)
#endif SYM_CAT_H #endif SYM_CAT_H