make it possible to keep Config/Kbuild snippets in *.c files

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 55 insertions, 0 deletions

diff --git a/scripts/gen_build_files.sh b/scripts/gen_build_files.sh
new file mode 100644
index 000000000..300d90c2a
--- /dev/null
+++ b/scripts/gen_build_files.sh
@@ -0,0 +1,55 @@
+#!/bin/sh
+
+test $# -ge 2 || exit 1
+
+# cd to objtree
+cd "$2" || exit 1
+
+srctree="$1"
+
+find -type d \
+| while read; do
+    d="$REPLY"
+
+    src="$srctree/$d/Kbuild.src"
+    dst="$d/Kbuild"
+    if test -f "$src"; then
+        echo "  CHK     $dst"
+
+        s=`grep -h '^//kbuild:' "$srctree/$d"/*.c | sed 's^//kbuild:^^'`
+        while read; do
+            test x"$REPLY" = x"INSERT" && REPLY="$s"
+            printf "%s\n" "$REPLY"
+        done <"$src" >"$dst.$$.tmp"
+
+        if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
+            rm "$dst.$$.tmp"
+        else
+            echo "  GEN     $dst"
+            mv "$dst.$$.tmp" "$dst"
+        fi
+    fi
+
+    src="$srctree/$d/Config.src"
+    dst="$d/Config.in"
+    if test -f "$src"; then
+        echo "  CHK     $dst"
+
+        s=`grep -h '^//config:' "$srctree/$d"/*.c | sed 's^//config:^^'`
+        while read; do
+            test x"$REPLY" = x"INSERT" && REPLY="$s"
+            printf "%s\n" "$REPLY"
+        done <"$src" >"$dst.$$.tmp"
+
+        if test -f "$dst" && cmp -s "$dst.$$.tmp" "$dst"; then
+            rm "$dst.$$.tmp"
+        else
+            echo "  GEN     $dst"
+            mv "$dst.$$.tmp" "$dst"
+        fi
+    fi
+
+done
+
+# Last read failed. This is normal. Don't exit with its error code:
+exit 0