build: introduce declarative non-recursive build graph

1 files changed, 29 insertions, 0 deletions

diff --git a/scripts/build/generate-autoconf.sh b/scripts/build/generate-autoconf.sh
new file mode 100755
index 0000000..493d630
--- /dev/null
+++ b/scripts/build/generate-autoconf.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+set -eu
+output=$1
+shift
+tmp="$output.tmp.$$"
+mkdir -p "$(dirname "$output")"
+{
+    echo '/* AUTO-GENERATED — DO NOT EDIT */'
+    echo '#pragma once'
+    while [ "$#" -gt 0 ]; do
+        name=$1
+        value=$2
+        kind=$3
+        shift 3
+        if [ "$kind" = bool ]; then
+            [ "$value" = y ] && echo "#define $name 1"
+        else
+            echo "#define $name $value"
+        fi
+    done
+} > "$tmp"
+if [ -e "$output" ] && cmp -s "$tmp" "$output"; then
+    rm -f "$tmp"
+else
+    mv -f "$tmp" "$output"
+fi
+