glew: fix Makefile race

Fix a Makefile race resulting in the target creating a directory being
executed after the target to write into that directory.

[ YOCTO #14485 ]

(From OE-Core rev: 098e9a98ef31211d9a217ab1fde4655b81a7b56d)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit e90c1d3b80e35fb685d4b321972743771eb2c2c0)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/glew/glew/0001-Fix-build-race-in-Makefile.patch

@@ -0,0 +1,56 @@
+Upstream-Status: Submitted [https://github.com/nigels-com/glew/pull/311]
+Signed-off-by: Ross Burton <ross.burton@arm.com>
+
+From 0ce0a85597db48a2fca619bd95e34af091e54ae8 Mon Sep 17 00:00:00 2001
+From: Ross Burton <ross.burton@arm.com>
+Date: Thu, 22 Jul 2021 16:31:11 +0100
+Subject: [PATCH] Fix build race in Makefile
+
+The current rule for the binaries is:
+
+glew.bin: glew.lib bin bin/$(GLEWINFO.BIN) bin/$(VISUALINFO.BIN)
+
+In parallel builds, all of those targets happen at the same time. This
+means that 'bin' can happen *after* 'bin/$(GLEWINFO.BIN)', which is a
+problem as the 'bin' target's responsibility is to create the directory
+that the other target writes into.
+
+Solve this by not having a separate 'create directory' target which is
+fundamentally racy, and simply mkdir in each target which writes into it.
+---
+ Makefile | 9 ++++-----
+ 1 file changed, 4 insertions(+), 5 deletions(-)
+
+diff --git a/Makefile b/Makefile
+index d0e4614..04af44c 100644
+--- a/Makefile
++++ b/Makefile
+@@ -171,21 +171,20 @@ VISUALINFO.BIN.OBJ := $(VISUALINFO.BIN.OBJ:.c=.o)
+ # Don't build glewinfo or visualinfo for NaCL, yet.
+ 
+ ifneq ($(filter nacl%,$(SYSTEM)),)
+-glew.bin: glew.lib bin
++glew.bin: glew.lib
+ else
+-glew.bin: glew.lib bin bin/$(GLEWINFO.BIN) bin/$(VISUALINFO.BIN) 
++glew.bin: glew.lib bin/$(GLEWINFO.BIN) bin/$(VISUALINFO.BIN)
+ endif
+ 
+-bin:
+-	mkdir bin
+-
+ bin/$(GLEWINFO.BIN): $(GLEWINFO.BIN.OBJ) $(LIB.SHARED.DIR)/$(LIB.SHARED)
++	@mkdir -p $(dir $@)
+ 	$(CC) $(CFLAGS) -o $@ $(GLEWINFO.BIN.OBJ) $(BIN.LIBS)
+ ifneq ($(STRIP),)
+ 	$(STRIP) -x $@
+ endif
+ 
+ bin/$(VISUALINFO.BIN): $(VISUALINFO.BIN.OBJ) $(LIB.SHARED.DIR)/$(LIB.SHARED)
++	@mkdir -p $(dir $@)
+ 	$(CC) $(CFLAGS) -o $@ $(VISUALINFO.BIN.OBJ) $(BIN.LIBS)
+ ifneq ($(STRIP),)
+ 	$(STRIP) -x $@
+-- 
+2.25.1
+

meta/recipes-graphics/glew/glew_2.2.0.bb

@@ -6,6 +6,7 @@ LICENSE = "MIT"
 LIC_FILES_CHKSUM = "file://LICENSE.txt;md5=2ac251558de685c6b9478d89be3149c2"
 
 SRC_URI = "${SOURCEFORGE_MIRROR}/project/glew/glew/${PV}/glew-${PV}.tgz \
+           file://0001-Fix-build-race-in-Makefile.patch \
            file://no-strip.patch"
 
 SRC_URI[md5sum] = "3579164bccaef09e36c0af7f4fd5c7c7"