From 8c58e5683cbd90d529eb1ea86fce019e553b2248 Mon Sep 17 00:00:00 2001
From: Tomasz Kramkowski <tk@the-tk.com>
Date: Thu, 5 Aug 2021 18:30:33 +0100
Subject: Cross compilation support

---
 .vars.rc.do | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

(limited to '.vars.rc.do')

diff --git a/.vars.rc.do b/.vars.rc.do
index a5521e6..8a31fe7 100755
--- a/.vars.rc.do
+++ b/.vars.rc.do
@@ -3,9 +3,11 @@ set -e
 
 # Ensure variables from the config aren't set before the config is read to
 # avoid capturing transient state
-unset CC CFLAGS CPPFLAGS LDFLAGS LDLIBS colour debug optimise verbose warn werror
+unset {,T,H}{CC,CFLAGS,CPPFLAGS,LDFLAGS,LDLIBS} \
+      colour debug optimise verbose warn werror
 
-CFLAGS=(-std=c11 -fPIC)
+CFLAGS=(-std=c11)
+TCFLAGS=(-fPIC)
 
 warnings=(
 	-Wall -Wcast-align -Wcast-qual -Wextra -Wpedantic -Wformat=2
@@ -13,7 +15,7 @@ warnings=(
 	-Wstrict-prototypes
 )
 
-declare -a CFLAGS CPPFLAGS LDFLAGS LDLIBS
+declare -a {,T,H}{CFLAGS,CPPFLAGS,LDFLAGS,LDLIBS}
 
 if [ -e config.rc ]; then
 	redo-ifchange config.rc
@@ -47,8 +49,8 @@ if [[ $debug ]]; then
 	LDFLAGS+=(-Og -g)
 fi
 if [[ $optimise ]]; then
-	CFLAGS+=(-O2 -flto)
-	LDFLAGS+=(-O2 -flto)
+	TCFLAGS+=(-O2 -flto)
+	TLDFLAGS+=(-O2 -flto)
 fi
 if [[ $warn ]]; then
 	CFLAGS+=("${warnings[@]}")
@@ -60,9 +62,17 @@ if [[ $werror ]]; then
 	CFLAGS+=(-Werror)
 fi
 
+if [[ ! $TCC ]]; then TCC=$CC; fi
+if [[ ! $HCC ]]; then HCC=$CC; fi
+for p in T H; do
+	for v in CFLAGS CPPFLAGS LDFLAGS LDLIBS; do
+		eval "$p$v+=(\"\${$v[@]}\")"
+	done
+done
+
 {
 	echo "# generated by $0"
-	declare -p CC CFLAGS CPPFLAGS LDFLAGS LDLIBS
+	declare -p {T,H}{CC,CFLAGS,CPPFLAGS,LDFLAGS,LDLIBS}
 } >"$3"
 
 if [[ $verbose ]]; then
-- 
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