From f8531ed41003759e81a42d94dc410e9f725f1532 Mon Sep 17 00:00:00 2001
From: "Anthony J. Bentley" <anthony@anjbe.name>
Date: Fri, 16 Dec 2016 23:23:37 -0700
Subject: [PATCH] Add a thin wrapper makefile for GNU Make.

GNU Make 3.x doesn't support the "!=" syntax for shell assignment,
although 4.x does, BSD Makes do, and it has been submitted to POSIX
for possible inclusion in the standard. Unfortunately, GNU Make 3.x
is still in common use, so provide an alternative makefile (GNU Make
reads "GNUmakefile" instead of "Makefile" by default) that sets the
variables and then reuses the rest of the default Makefile.
---
 GNUMakefile | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 GNUMakefile

diff --git a/GNUMakefile b/GNUMakefile
new file mode 100644
index 00000000..9650e67f
--- /dev/null
+++ b/GNUMakefile
@@ -0,0 +1,6 @@
+# GNU Make 3.x doesn't support the "!=" shell syntax, so here's an alternative
+
+PKG_CONFIG = pkg-config
+PNGFLAGS = $(shell ${PKG_CONFIG} --cflags libpng)
+
+include Makefile