From 46b62a446ee138d67293c1b207d76d6b05ba9223 Mon Sep 17 00:00:00 2001
From: rsiddharth <rsd@gnu.org>
Date: Sun, 19 May 2019 11:11:22 -0400
Subject: Makefile: Add GNU_MAKE.

* Makefile (GNU_MAKE): New variable.
(docs): Use GNU Make.
(clean-docs): Use GNU Make.
---
 Makefile | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 35a0028..04083de 100644
--- a/Makefile
+++ b/Makefile
@@ -5,6 +5,8 @@
 #   This file is part of lpschedule-generator.
 #
 
+GNU_MAKE=gmake
+
 VENV_DIR='.venv'
 VENV_CMD=virtualenv
 VENV_PREFIX=.
@@ -28,7 +30,7 @@ upload:
 .PHONY: build-dist egg upload
 
 docs:
-	@$(MAKE) -C docs html
+	${GNU_MAKE} -C docs html
 
 upload-docs: docs
 	@rsync -avz --delete docs/_build/html/  $(LPSG_DOCS_HOST)
@@ -65,7 +67,7 @@ clean-venv:
 	@rm -rf .venv*/
 
 clean-docs:
-	@$(MAKE) -C docs clean
+	${GNU_MAKE} -C docs clean
 
 .PHONY: clean-build clean-pyc clean-venv clean-docs
 
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