From f73a878fd1af16c6cf9b2d153b51753374f1a159 Mon Sep 17 00:00:00 2001
From: Mark Wooding <mdw@distorted.org.uk>
Date: Sat, 22 Dec 2018 09:27:48 +0000
Subject: [PATCH] Makefile: Emit a `etc/config.sh' snippet about target
 architectures.

Not needed yet, but may come in handy later.
---
 .gitignore |  1 +
 Makefile   | 15 +++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/.gitignore b/.gitignore
index 339c3b3..5de6399 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 /bin/
 /inst.*/
+/etc/config.sh
 /etc/*-setup.sh
 
diff --git a/Makefile b/Makefile
index 1411e61..5c1ffc1 100644
--- a/Makefile
+++ b/Makefile
@@ -23,6 +23,9 @@ android-arm64_ARCH	 = aarch64-linux-android
 android-x86_ARCH	 = i686-linux-android
 android-x86_64_ARCH	 = x86_64-linux-android
 
+CONFIG_VARS		+= FLAVOURS
+CONFIG_VARS		+= $(foreach f,$(FLAVOURS), $f_ARCHS)
+
 V			 = 0
 v_tag			 = $(call v_tag_$V,$1)
 v_tag_0			 = @printf "  %-8s %s\n" "$1" "$@";
@@ -53,6 +56,18 @@ $(BINSCRIPTS): bin/%: src/%.in
 	$(call v_tag,SED)sed 's@crossdir@$(CROSSDIR)' $< >$@.new && \
 		chmod +x $@.new && mv $@.new $@
 
+fix			 = $(subst -,_,$1)
+quote			 = '$(subst ','\'',$1)'#'
+
+TARGETS			+= etc/config.sh
+etc/config.sh: Makefile
+	$(V_AT)mkdir -p $(dir $@)
+	$(call v_tag,GEN){ \
+		echo '### -*-sh-*- GENERATED by mdw-cross/Makefile'; \
+		$(foreach v,$(CONFIG_VARS), \
+			echo $(call fix,$v)=$(call quote,$(call quote,$($v)));) \
+	} >$@.new && mv $@.new $@
+
 all:: $(TARGETS)
 
 CLEANFILES		+= $(TARGETS)
-- 
2.11.0