autoconf: don't use platform regex if it lacks REG_STARTEND

If the platform regex cannot match null bytes, we might as well
use the glibc version instead.

Cc: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Cc: René Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Tested-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jonathan Nieder 2010-08-17 09:24:42 +00:00 коммит произвёл Junio C Hamano
Родитель 7e36de5859
Коммит a1e3b669fa
2 изменённых файлов: 22 добавлений и 0 удалений

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@ -58,6 +58,7 @@ NO_INET_NTOP=@NO_INET_NTOP@
NO_INET_PTON=@NO_INET_PTON@
NO_ICONV=@NO_ICONV@
OLD_ICONV=@OLD_ICONV@
NO_REGEX=@NO_REGEX@
NO_DEFLATE_BOUND=@NO_DEFLATE_BOUND@
INLINE=@INLINE@
SOCKLEN_T=@SOCKLEN_T@

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@ -706,6 +706,27 @@ else
fi
AC_SUBST(NO_C99_FORMAT)
#
# Define NO_REGEX if you have no or inferior regex support in your C library.
AC_CACHE_CHECK([whether the platform regex can handle null bytes],
[ac_cv_c_excellent_regex], [
AC_EGREP_CPP(yippeeyeswehaveit,
AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
#include <regex.h>
],
[#ifdef REG_STARTEND
yippeeyeswehaveit
#endif
]),
[ac_cv_c_excellent_regex=yes],
[ac_cv_c_excellent_regex=yes])
])
if test $ac_cv_c_excellent_regex = yes; then
NO_REGEX=
else
NO_REGEX=YesPlease
fi
AC_SUBST(NO_REGEX)
#
# Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
# when attempting to read from an fopen'ed directory.
AC_CACHE_CHECK([whether system succeeds to read fopen'ed directory],