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Add the LAST_ARG_MUST_BE_NULL macro

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The sentinel function attribute is not understood by versions of
the gcc compiler prior to v4.0. At present, for earlier versions
of gcc, the build issues 108 warnings related to the unknown
attribute. In order to suppress the warnings, we conditionally
define the LAST_ARG_MUST_BE_NULL macro to provide the sentinel attribute
for gcc v4.0 and newer.

Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ramsay Jones
2013-07-18 21:02:12 +01:00
committed by Junio C Hamano
parent 8dd0ee823f
commit 9fe3edc47f
5 changed files with 12 additions and 5 deletions
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4
builtin/revert.c
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@ -54,7 +54,7 @@ static int option_parse_x(const struct option *opt,
return 0;
}
__attribute__((sentinel))
LAST_ARG_MUST_BE_NULL
static void verify_opt_compatible(const char *me, const char *base_opt, ...)
{
const char *this_opt;
@ -71,7 +71,7 @@ static void verify_opt_compatible(const char *me, const char *base_opt, ...)
die(_("%s: %s cannot be used with %s"), me, this_opt, base_opt);
}
__attribute__((sentinel))
LAST_ARG_MUST_BE_NULL
static void verify_opt_mutually_compatible(const char *me, ...)
{
const char *opt1, *opt2 = NULL;