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* common.h (NLM_CAT, NLM_CAT3): Don't define. 

(NLM_CAT4): Update conditions under which this is defined.  Document
	why CONCAT4 can't be used.
This commit is contained in:
Alan Modra 2001-10-02 05:59:56 +00:00
parent 4ab6034f50
commit 58045dff80
2 changed files with 31 additions and 26 deletions
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6
include/nlm/ChangeLog
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@ -1,3 +1,9 @@
2001-10-02 Alan Modra <amodra@bigpond.net.au>
* common.h (NLM_CAT, NLM_CAT3): Don't define.
(NLM_CAT4): Update conditions under which this is defined. Document
why CONCAT4 can't be used.
Fri May 6 13:31:04 1994 Ian Lance Taylor (ian@tweedledumb.cygnus.com)
* external.h (nlmNAME(External_Custom_Header)): Add length,

51
include/nlm/common.h
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@ -1,5 +1,5 @@
/* NLM (NetWare Loadable Module) support for BFD.
Copyright 1993 Free Software Foundation, Inc.
Copyright 1993, 2001 Free Software Foundation, Inc.
Written by Fred Fish @ Cygnus Support
@ -23,31 +23,6 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* This file is part of NLM support for BFD, and contains the portions
that are common to both the internal and external representations. */
/* Semi-portable string concatenation in cpp.
The NLM_CAT4 hack is to avoid a problem with some strict ANSI C
preprocessors. The problem is, "32_" or "64_" are not a valid
preprocessing tokens, and we don't want extra underscores (e.g.,
"nlm_32_"). The XNLM_CAT2 macro will cause the inner NLM_CAT macros
to be evaluated first, producing still-valid pp-tokens. Then the
final concatenation can be done. (Sigh.) */
#ifdef SABER
# define NLM_CAT(a,b) a##b
# define NLM_CAT3(a,b,c) a##b##c
# define NLM_CAT4(a,b,c,d) a##b##c##d
#else
# ifdef __STDC__
# define NLM_CAT(a,b) a##b
# define NLM_CAT3(a,b,c) a##b##c
# define XNLM_CAT2(a,b) NLM_CAT(a,b)
# define NLM_CAT4(a,b,c,d) XNLM_CAT2(NLM_CAT(a,b),NLM_CAT(c,d))
# else
# define NLM_CAT(a,b) a/**/b
# define NLM_CAT3(a,b,c) a/**/b/**/c
# define NLM_CAT4(a,b,c,d) a/**/b/**/c/**/d
# endif
#endif
/* If NLM_ARCH_SIZE is not defined, default to 32. NLM_ARCH_SIZE is
optionally defined by the application. */
@ -55,6 +30,30 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
# define NLM_ARCH_SIZE 32
#endif
/* Due to horrible details of ANSI macro expansion, we can't use CONCAT4
for NLM_NAME. CONCAT2 is used in BFD_JUMP_TABLE macros, and some of
them will expand to tokens that themselves are macros defined in terms
of NLM_NAME. If NLM_NAME were defined using CONCAT4 (which is itself
defined in bfd-in.h using CONCAT2), ANSI preprocessor rules say that
the CONCAT2 within NLM_NAME should not be expanded.
So use another name. */
#if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE)
#ifdef SABER
#define NLM_CAT4(a,b,c,d) a##b##c##d
#else
/* This hack is to avoid a problem with some strict ANSI C preprocessors.
The problem is, "32_" is not a valid preprocessing token, and we don't
want extra underscores (e.g., "nlm_32_"). The NLM_XCAT2 macro will
cause the inner CAT2 macros to be evaluated first, producing
still-valid pp-tokens. Then the final concatenation can be done. */
#define NLM_CAT2(a,b) a##b
#define NLM_XCAT2(a,b) NLM_CAT2(a,b)
#define NLM_CAT4(a,b,c,d) NLM_XCAT2(NLM_CAT2(a,b),NLM_CAT2(c,d))
#endif
#else
#define NLM_CAT4(a,b,c,d) a/**/b/**/c/**/d
#endif
#if NLM_ARCH_SIZE == 32
# define NLM_TARGET_LONG_SIZE 4
# define NLM_TARGET_ADDRESS_SIZE 4