diff options
Diffstat (limited to 'include/nlm')
| -rw-r--r-- | include/nlm/ChangeLog | 6 | ||||
| -rw-r--r-- | include/nlm/common.h | 51 |
2 files changed, 31 insertions, 26 deletions
diff --git a/include/nlm/ChangeLog b/include/nlm/ChangeLog index d9ea3d0..979b162 100644 --- a/include/nlm/ChangeLog +++ b/include/nlm/ChangeLog @@ -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, diff --git a/include/nlm/common.h b/include/nlm/common.h index 70ec186..208f4cf 100644 --- a/include/nlm/common.h +++ b/include/nlm/common.h @@ -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 |