mirror of
https://github.com/RIOT-OS/RIOT.git
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85 lines
2.0 KiB
Bash
85 lines
2.0 KiB
Bash
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#!/bin/sh
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#
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# Copyright (C) 2016 Eistec AB
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#
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# This file is subject to the terms and conditions of the GNU Lesser General
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# Public License v2.1. See the file LICENSE in the top level directory for more
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# details.
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#
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DEBUG=0
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if [ "${QUIET}" != "1" ]; then
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DEBUG=1
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fi
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if [ $# -lt 1 ]; then
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echo "Usage: $0 <output.h> [CFLAGS]..."
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echo "Extract all macros from CFLAGS and generate a header file"
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exit 1
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fi
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OUTPUTFILE="$1"
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shift
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MD5SUM=md5sum
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if [ "$(uname -s)" = "Darwin" ]; then
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MD5SUM=md5 -r
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fi
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# atomically update the file
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TMPFILE=
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trap '[ -n "${TMPFILE}" ] && rm -f "${TMPFILE}"' EXIT
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# Create temporary output file
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TMPFILE=$(mktemp ${OUTPUTFILE}.XXXXXX)
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if [ -z "${TMPFILE}" ]; then
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echo "Error creating temporary file, aborting"
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exit 1
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fi
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# exit on any errors below this line
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set -e
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echo "/* DO NOT edit this file, your changes will be overwritten and won't take any effect! */" > "${TMPFILE}"
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echo "/* Generated from CFLAGS: $@ */" >> "${TMPFILE}"
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for arg in "$@"; do
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case ${arg} in
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-D*)
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# Strip leading -D
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d=${arg#-D}
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if [ -z "${d##*=*}" ]; then
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# key=value pairs
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key=${d%%=*}
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value=${d#*=}
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echo "#define $key $value" >> "${TMPFILE}"
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else
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# simple #define
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echo "#define $d 1" >> "${TMPFILE}"
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fi
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;;
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-U*)
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# Strip leading -U
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d=${arg#-U}
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echo "#undef $d" >> "${TMPFILE}"
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;;
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*)
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continue
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;;
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esac
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done
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# Only replace old file if the new file differs. This allows make to check the
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# date of the config header for dependency calculations.
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NEWMD5=$(${MD5SUM} ${TMPFILE} | cut -c -32)
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OLDMD5=$(${MD5SUM} ${OUTPUTFILE} 2>/dev/null | cut -c -32)
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if [ "${NEWMD5}" != "${OLDMD5}" ]; then
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if [ "${DEBUG}" -eq 1 ]; then echo "Replacing ${OUTPUTFILE} (${NEWMD5} != ${OLDMD5})"; fi
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# Set mode according to umask
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chmod +rw "${TMPFILE}"
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mv -f "${TMPFILE}" "${OUTPUTFILE}"
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else
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if [ "${DEBUG}" -eq 1 ]; then echo "Keeping old ${OUTPUTFILE}"; fi
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fi
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# $TMPFILE will be deleted by the EXIT trap above if it still exists when we exit
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