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From f195ffffb133c9cda88d5eac41c0f584fd4540c9 Mon Sep 17 00:00:00 2001
From: Trevor Woerner <twoerner@gmail.com>
Date: Fri, 4 Dec 2020 03:48:36 -0500
Subject: [PATCH] Makefile: reorganize

Reorganize the main Makefile in order to:
1. be able to build in parallel
2. have build failures in subdirectories stop the build

Now the "-j <#threads>" option can be used with 'make'.

Also, if a build failure occurs in a subdirectory, this new arrangement will
cause the build to stop and fail instead of silently ignoring it.

To build simply invoke 'make' with or without a -j option.
To install simply invoke: make TARGET=install
To clean simply invoke: make TARGET=clean

Upstream-status: submitted [https://github.com/AndrewFromMelbourne/raspidmx/pull/29]
Signed-off-by: Trevor Woerner <twoerner@gmail.com>
---
 Makefile | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/Makefile b/Makefile
index 4a06de9..1f9f7c4 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,4 @@
-TARGETS=lib \
-	life \
+TARGETS=life \
 	mandelbrot \
 	offscreen \
 	pngview \
@@ -10,15 +9,11 @@ TARGETS=lib \
 	spriteview \
 	test_pattern \
 	worms
+.PHONY: all lib install clean $(TARGETS)
 
-default :all
-
-all:
-	for target in $(TARGETS); do ($(MAKE) -C $$target); done
-
-install:
-	for target in $(TARGETS); do ($(MAKE) -C $$target install); done
-
-clean:
-	for target in $(TARGETS); do ($(MAKE) -C $$target clean); done
+all: $(TARGETS)
 
+$(TARGETS): lib
+	$(MAKE) -C $@ $(TARGET)
+lib:
+	$(MAKE) -C $@ $(TARGET)