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xz: Include <strings.h> in suffix.c if needed for strcasecmp().

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SUSv2 and POSIX.1‐2017 declare only a few functions in <strings.h>.
Of these, strcasecmp() is used on some platforms in suffix.c.
Nothing else in the project needs <strings.h> (at least if
building on a modern system).

sysdefs.h currently includes <strings.h> if HAVE_STRINGS_H is
defined and suffix.c relied on this.

Note that dos/config.h doesn't #define HAVE_STRINGS_H even though
DJGPP does have strings.h. It isn't needed with DJGPP as strcasecmp()
is also in <string.h> in DJGPP.
This commit is contained in:
Lasse Collin 2023-01-10 11:23:41 +02:00
parent 7049c4a76c
commit ec2fc39fe4
1 changed files with 3 additions and 0 deletions
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src/xz/suffix.c
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@ -18,6 +18,9 @@
// For case-insensitive filename suffix on case-insensitive systems
#if defined(TUKLIB_DOSLIKE) || defined(__VMS)
# ifdef HAVE_STRINGS_H
# include <strings.h>
# endif
# define strcmp strcasecmp
#endif