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https://github.com/lz4/lz4/pull/1485

From bce6a94c25a9077fdcd7c94079a24f9713b192e1 Mon Sep 17 00:00:00 2001
From: Fabian Groffen <grobian@gentoo.org>
Date: Tue, 30 Jul 2024 21:50:06 +0200
Subject: [PATCH] meson: do not force c99 mode
MIME-Version: 1.0
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On Solaris/OpenIndiana hosts forcing (old) C99 means disabling POSIX
2001 functionality, resulting in errors like

In file included from ../../../net/ptah/export/gentoo/working-repos/lz4/programs/bench.c:39:
../../../net/ptah/export/gentoo/working-repos/lz4/programs/util.h: In function  UTIL_getOpenFileSize’:
../../../net/ptah/export/gentoo/working-repos/lz4/programs/util.h:156:23: error: implicit declaration of function ‘fileno’ [-Wimplicit-function-declaration]
  156 | #  define UTIL_fileno fileno
      |                       ^~~~~~
../../../net/ptah/export/gentoo/working-repos/lz4/programs/util.h:325:10: note: in expansion of macro ‘UTIL_fileno’
  325 |     fd = UTIL_fileno(file);
      |          ^~~~~~~~~~~

These can be fixed either by forcing a standard to be applied in programs/platform.h or by not forcing the compiler to use an old standard.

Since CMake and Makefile don't force C99 by default either, just drop it from
meson.build.

Signed-off-by: Fabian Groffen <grobian@gentoo.org>
---
 build/meson/meson.build | 1 -
 1 file changed, 1 deletion(-)

diff --git a/build/meson/meson.build b/build/meson/meson.build
index fc6408af6..7e1696802 100644
--- a/build/meson/meson.build
+++ b/build/meson/meson.build
@@ -16,7 +16,6 @@ project(
   'c',
   license: 'BSD-2-Clause-Patent AND GPL-2.0-or-later',
   default_options: [
-    'c_std=c99',
     'buildtype=release',
     'warning_level=3'
   ],