From 4d2e0fffb08f0418fa6995be2e15aad7ee11b048 Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 13 Aug 2018 19:12:23 +0000
Subject: [PATCH] FreeBSD 11.0 lacks ELFCOMPRESS_ZLIB

FreeBSD 11.0 unfortunately lacks ELF compression definitions in their
elf.h (sys/elf_common.h), and 11.1 introduced them.
https://github.com/freebsd/freebsd/commit/b9167d33a12b8a6c279be9cd1005874728e808c9

Though we can add workaround, we simply drop support because
FreeBSD 11.0 is already EOL at November 30, 2017.
https://www.freebsd.org/security/unsupported.html

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64351 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 addr2line.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/addr2line.c b/addr2line.c
index 2a13c5ded6..2c422cc169 100644
--- a/addr2line.c
+++ b/addr2line.c
@@ -102,7 +102,8 @@ void *alloca();
 #endif
 
 #ifdef SHF_COMPRESSED
-# ifdef HAVE_LIBZ
+# if defined(ELFCOMPRESS_ZLIB) && defined(HAVE_LIBZ)
+   /* FreeBSD 11.0 lacks ELFCOMPRESS_ZLIB */
 #  include <zlib.h>
 #  define SUPPORT_COMPRESSED_DEBUG_LINE
 # endif