util: add ofc (one file compile) script

notwa-util/Dockerfile

@@ -3,7 +3,7 @@
 FROM alpine:3.16 as partial
 # need this for acquire (.tar.xz files):
 RUN apk add --no-cache xz
-COPY --chmod=0755 acquire cosmocc dedupe quickconf shed \
+COPY --chmod=0755 acquire cosmocc dedupe ofc quickconf shed \
     /usr/local/bin/
 RUN ln -s /usr/local/bin /nu
 WORKDIR /media/common

notwa-util/ofc

@@ -0,0 +1,12 @@
+#!/usr/bin/env sh
+:   "${CC:=cc}" "${LDFLAGS=-Wl,--gc-sections}" "${CFLAGS=-Os -g -Wall -Wextra \
+-Wwrite-strings -Wformat=2 -Wno-unused -ffunction-sections -fdata-sections}" \
+ && compile() { "$CC" $CFLAGS $CPPFLAGS -c -o "$n$obj" "$c" ;} \
+ && link() { "$CC" $LDFLAGS -o "$n$dbg" "$n$obj" $LIBS ;} \
+ && finish() { "${STRIP:-strip}" "$n$dbg" -o "$n$exe" ;} \
+ && obj=.o dbg=.dbg exe= \
+ &&  if [ cosmocc = "${CC##*/}" ]; then dbg=.com.dbg exe=.com \
+     && finish() { "${OBJCOPY:-objcopy}" -S -O binary "$n$dbg" "$n$exe" ;} \
+    ;fi \
+ && for c in "$@"; do n="${c%.*}" && compile && link && finish || exit; done \
+;