From 0703c968caef660adbad0677b2112887cdc9b18c Mon Sep 17 00:00:00 2001
From: Austin Harris <mail@austin-harris.com>
Date: Sat, 11 Sep 2021 19:23:02 -0500
Subject: [PATCH] scons: Setup the m4 tool for libelf

This resolves an error that SConsEnvironment has no attribute 'm4' on
some systems.

Change-Id: I9dfce277308d1939c3bd392f83dc49937884660e
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/50259
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
---
 ext/libelf/SConscript | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ext/libelf/SConscript b/ext/libelf/SConscript
index f3dbe6ae7b..a5f3569c9d 100644
--- a/ext/libelf/SConscript
+++ b/ext/libelf/SConscript
@@ -116,6 +116,9 @@ if not SCons.Tool.m4.exists(m4env):
          "Please install M4 and try again.")
    Exit(1)
 
+# Setup m4 tool
+m4env.Tool('m4')
+
 m4env.Append(M4FLAGS=['-DSRCDIR=%s' % Dir('.').path])
 m4env['M4COM'] = '$M4 $M4FLAGS $SOURCES > $TARGET'
 m4env.M4(target=File('libelf_convert.c'),