pgsql: Add configure infrastructure (--with-llvm) to enable LLVM suppor

From: Andres Freund <andres(at)anarazel(dot)de>
To: pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: pgsql: Add configure infrastructure (--with-llvm) to enable LLVM suppor
Date: 2018-03-21 00:29:47
Message-ID: E1eyRdT-0007tL-BH@gemulon.postgresql.org
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Add configure infrastructure (--with-llvm) to enable LLVM support.

LLVM will be used for *optional* Just-in-time compilation
support. This commit just adds the configure infrastructure that
detects LLVM.

No documentation has been added for the --with-llvm flag, that'll be
added after the actual supporting code has been added.

Author: Andres Freund
Discussion: https://postgr.es/m/20170901064131.tazjxwus3k2w3ybh@alap3.anarazel.de

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/5b2526c83832e4e8a9f8db0389904ed2fb50ed37

Modified Files
--------------
aclocal.m4 | 1 +
config/llvm.m4 | 108 ++++++
configure | 788 ++++++++++++++++++++++++++++++++++++++----
configure.in | 62 +++-
src/Makefile.global.in | 11 +
src/include/pg_config.h.in | 19 +
src/include/pg_config.h.win32 | 19 +
7 files changed, 939 insertions(+), 69 deletions(-)

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