From ffb9f2980902d23a5640435306031bc298eb4e02 Mon Sep 17 00:00:00 2001
From: David Aguilar <davvid@gmail.com>
Date: Sat, 15 Jan 2022 18:05:20 -0800
Subject: build: centos/RHEL 7 ships with an older gcc and zlib

GCC 4.8.5 is the default system compiler on centos7/RHEL7.
This version requires -std=c99 to enable c99 support.

zlib 1.2.7 on centos7/rhel7 lacks uncompress2().

Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/config.mak.uname b/config.mak.uname
index a3a7793..5ed1d87 100644
--- a/config.mak.uname
+++ b/config.mak.uname
@@ -63,6 +63,11 @@ ifeq ($(uname_S),Linux)
 	PROCFS_EXECUTABLE_PATH = /proc/self/exe
 	HAVE_PLATFORM_PROCINFO = YesPlease
 	COMPAT_OBJS += compat/linux/procinfo.o
+	# centos7/rhel7 provides gcc 4.8.5 and zlib 1.2.7.
+	ifneq ($(findstring .el7.,$(uname_R)),)
+		BASIC_CFLAGS += -std=c99
+		NO_UNCOMPRESS2 = YesPlease
+	endif
 endif
 ifeq ($(uname_S),GNU/kFreeBSD)
 	HAVE_ALLOCA_H = YesPlease
-- 
cgit v0.10.2-6-g49f6