system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-09-20 08:44:33 +00:00
Code Issues Packages Projects Releases Wiki Activity

Attempt to refine the __IDSTRING() macros so that they dont collide with

Browse source 
each other.  This will allow multiple __RCSID() entries in the same file
and even __RCSID() in headers.  **HOWEVER**, the usefulness of this in
headers is somewhat marginal in non-ELF since they would go into the
data section where they cannot be easily compressed or stripped.
It (id's in headers) is also not useful in the non-GCC case since it is
hard to generate unique variable names.  I have an idea on that though.

Now for mcs: http://mirrors.ccs.neu.edu/cgi-bin/unixhelp/man-cgi?mcs+1
This commit is contained in:
Peter Wemm 2001-09-05 02:50:32 +00:00
parent eda54d6828
commit ea06a038a5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=83049
1 changed files with 12 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
sys/sys/cdefs.h
View file

@ -192,22 +192,30 @@
#endif /* __ELF__ */
#endif /* __GNUC__ */
#if defined(__GNUC__) && defined(__ELF__)
#ifdef __GNUC__
#ifdef __ELF__
#define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"")
#else
#define __IDSTRING(name,string) __asm__(".data\n\t.asciz\t\"" string "\"\n\t.previous")
#endif
#else
/*
* This doesn't work in header files. But it may be better than nothing.
* The alternative is: #define __IDSTRING(name,string) /* nothing */
*/
#define __IDSTRING(name,string) static const char name[] __unused = string
#endif
#ifndef __RCSID
#define __RCSID(s) __IDSTRING(rcsid,s)
#define __RCSID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
#endif
#ifndef __RCSID_SOURCE
#define __RCSID_SOURCE(s) __IDSTRING(rcsid_source,s)
#define __RCSID_SOURCE(s) __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s)
#endif
#ifndef __COPYRIGHT
#define __COPYRIGHT(s) __IDSTRING(copyright,s)
#define __COPYRIGHT(s) __IDSTRING(__CONCAT(__copyright_,__LINE__),s)
#endif
#ifndef __DECONST