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grep: un-break building with PCRE < 8.20

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Amend my change earlier in this series ("grep: add support for the
PCRE v1 JIT API", 2017-04-11) to un-break the build on PCRE v1
versions earlier than 8.20.

The 8.20 release was the first release to have JIT & pcre_jit_stack in
the headers, so a mock type needs to be provided for it on those
releases.

Now git should compile with all PCRE versions that it supported before
my JIT change.

I've tested it as far back as version 7.5 released on 2008-01-10, once
I got down to version 7.0 it wouldn't build anymore with GCC 7.1.1,
and I couldn't be bothered to anything older than 7.5 as I'm confident
that if the build breaks on those older versions it's not because of
my JIT change.

See the "un-break" change in this series ("grep: un-break building
with PCRE < 8.32", 2017-05-10) for why this isn't squashed into the
main PCRE JIT commit.

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 2017-05-25 20:05:27 +00:00 committed by Junio C Hamano
parent e87de7cab4
commit c30cf827a8
1 changed files with 3 additions and 0 deletions
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3
grep.h
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@ -11,6 +11,9 @@
#ifndef PCRE_STUDY_JIT_COMPILE
#define PCRE_STUDY_JIT_COMPILE 0
#endif
#if PCRE_MAJOR <= 8 && PCRE_MINOR < 20
typedef int pcre_jit_stack;
#endif
#else
typedef int pcre;
typedef int pcre_extra;