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| author | Eric Blake <eblake@redhat.com> | 2011-07-11 17:05:34 -0600 |
|---|---|---|
| committer | Eric Blake <eblake@redhat.com> | 2011-07-11 17:18:25 -0600 |
| commit | a918da4d61d28be61a12605c9d35e2cf3966d866 (patch) | |
| tree | 551dbebe9645bf51d4de6c7828bcebffca92ae4e /lib/strings.in.h | |
| parent | 00a829e20e9bdb52d1b68357669ea248ed6661f1 (diff) | |
| download | gnulib-a918da4d61d28be61a12605c9d35e2cf3966d866.tar.gz | |
ffs: new module
Libvirt wants to use ffs() to avoid dragging in -lm for log2().
* modules/ffs: New file.
* m4/ffs.m4: Likewise.
* lib/ffs.c: Likewise.
* m4/strings_h.m4 (gl_HEADER_STRINGS_H_DEFAULTS): Add default.
* modules/strings (Makefile.am): Substitute witness.
(Depends-on): Add c++defs.
* lib/strings.in.h (ffs): Declare.
* modules/ffs-tests: New test file.
* tests/test-ffs.c: Test new module.
* MODULES.html.sh (Integer arithmetic functions): Mention it.
* doc/posix-functions/ffs.texi (ffs): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'lib/strings.in.h')
| -rw-r--r-- | lib/strings.in.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/strings.in.h b/lib/strings.in.h index ba5a1d8943..647903ad6a 100644 --- a/lib/strings.in.h +++ b/lib/strings.in.h @@ -30,6 +30,8 @@ #define _@GUARD_PREFIX@_STRINGS_H +/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */ + /* The definition of _GL_ARG_NONNULL is copied here. */ /* The definition of _GL_WARN_ON_USE is copied here. */ @@ -39,6 +41,20 @@ extern "C" { #endif + /* Find the index of the least-significant set bit. */ +#if @GNULIB_FFS@ +# if !@HAVE_FFS@ +_GL_FUNCDECL_SYS (ffs, int, (int i)); +# endif +_GL_CXXALIAS_SYS (ffs, int, (int i)); +_GL_CXXALIASWARN (ffs); +#elif defined GNULIB_POSIXCHECK +# undef ffs +# if HAVE_RAW_DECL_FFS +_GL_WARN_ON_USE (ffs, "ffs is not portable - use the ffs module"); +# endif +#endif + /* Compare strings S1 and S2, ignoring case, returning less than, equal to or greater than zero if S1 is lexicographically less than, equal to or greater than S2. |