From d461b029213d366e0aab0f305b3f92b8ecd8d2e8 Mon Sep 17 00:00:00 2001
From: Tomasz Kramkowski <tk@the-tk.com>
Date: Wed, 11 Aug 2021 01:25:59 +0100
Subject: make [HT]CC full paths for redo-ifchange in .tool

This should force rebuilding targets which depend on tools which have
changed in the filesystem and prevent envrionment changes from causing
build changes. But this should be documented.

Ideally a redo with a redo-always (or more aptly named redo-ifredo)
would mark an env target as needing redoing every time you run redo on a
deptree which includes it and this would in turn cause rebuilding of
things which rely on the environment (like tools which run from the
path).
---
 .vars.rc.do     | 2 ++
 default.tool.do | 6 +++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/.vars.rc.do b/.vars.rc.do
index 3e0d1a1..3a5d26d 100755
--- a/.vars.rc.do
+++ b/.vars.rc.do
@@ -63,7 +63,9 @@ if [[ $werror ]]; then
 fi
 
 if [[ ! $TCC ]]; then TCC=$CC; fi
+TCC=$(command -v "$TCC")
 if [[ ! $HCC ]]; then HCC=$CC; fi
+HCC=$(command -v "$HCC")
 for p in T H; do
 	for v in CFLAGS CPPFLAGS LDFLAGS LDLIBS; do
 		eval "$p$v+=(\"\${$v[@]}\")"
diff --git a/default.tool.do b/default.tool.do
index 717d3e2..21c9b12 100755
--- a/default.tool.do
+++ b/default.tool.do
@@ -22,6 +22,10 @@ link-*)
 *)
 	echo "Invalid tool name $1" >&2; exit 1 ;;
 esac
-printf '#generated by %s %s\ncmd=(%s)\n' "${0##*/}" "$tool" "$cmd" >"$3"
+cat <<EOF >"$3"
+#generated by ${0##*/} $tool
+cmd=($cmd)
+redo-ifchange "\${cmd[0]}"
+EOF
 if command -v redo-stamp &>/dev/null; then redo-stamp <"$3"; fi
 # vim:ft=bash
-- 
cgit v1.2.3-54-g00ecf