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configure: detect redundant --with-libpcre & --with-libpcre1 

The --with-libpcre option is a synonym for the --with-libpcre1 flag,
but the configure script allowed for redundantly specifying both.

Nothing broke as a result of this, but it's confusing, so let's
disallow it.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2018-03-11 13:26:08 +00:00 committed by Junio C Hamano
parent a91b113320
commit a363f981ec
1 changed files with 4 additions and 0 deletions
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4
configure.ac
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@ -280,6 +280,10 @@ AS_HELP_STRING([--with-libpcre],[synonym for --with-libpcre1]),
AC_ARG_WITH(libpcre1,
AS_HELP_STRING([--with-libpcre1],[support Perl-compatible regexes via libpcre1 (default is NO)])
AS_HELP_STRING([], [ARG can be also prefix for libpcre library and headers]),
if test -n "$USE_LIBPCRE1"; then
AC_MSG_ERROR([Only supply one of --with-libpcre or its synonym --with-libpcre1!])
fi
if test "$withval" = "no"; then
USE_LIBPCRE1=
elif test "$withval" = "yes"; then