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A shell script that uses ld/xxd to pack files into an object file or header file to be used by C programs
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| #!/bin/sh | |
| set -euo pipefail | |
| function usage { | |
| echo "usage: $0 [-o outfile] [-m text|binary] [-i] file..." | |
| echo "options:" | |
| echo " -h show usage info" | |
| echo " -i use xxd (usually comes with vim) to generate a C-style" | |
| echo " include header rather than an object file (overrides -m)" | |
| echo " -m <mode> binary mode (see -b section of ld man page for more info)" | |
| echo " -o <file> output object file" | |
| exit 0 | |
| } | |
| infiles="" | |
| outfile="" | |
| mode="binary" | |
| include=0 | |
| if [ $# == 0 ]; then usage; fi | |
| while test $# -gt 0; do | |
| case "$1" in | |
| -o) | |
| shift | |
| if [ -z $1 ] || [ "$outfile" != "" ]; then usage; fi | |
| outfile=$1 | |
| echo "outfile=$outfile" | |
| shift | |
| ;; | |
| -m|--mode) | |
| shift | |
| mode=$1 | |
| shift | |
| # if [ $mode != "text" ] && [ $mode != "binary" ]; then | |
| # usage | |
| # fi | |
| ;; | |
| -i|--include) | |
| shift | |
| include=1 | |
| # shift | |
| ;; | |
| -h|--help) | |
| usage | |
| ;; | |
| *) | |
| if [ "$1" != "" ]; then | |
| echo "Adding file '$1'" | |
| infiles="$infiles $1" | |
| fi | |
| shift | |
| ;; | |
| esac | |
| done | |
| if [ -z "$outfile" ]; then | |
| if [ $include = 1 ]; then | |
| outfile="_embed.h" | |
| else | |
| outfile="_embed.obj" | |
| fi | |
| fi | |
| if [ $include = 1 ]; then | |
| for i in $infiles; do | |
| xxd -i $i >> $outfile | |
| done | |
| echo "To embed the given file(s), add the following to your source code:" | |
| echo "#include \"$outfile\"" | |
| else | |
| ld -r -b $mode $infiles -o $outfile | |
| externs=$(objdump -x $outfile | grep -oE '[^ ]+$' | grep _binary_) | |
| if [ -z "$externs" ]; then | |
| echo "Failed getting object file info" | |
| exit 1 | |
| fi | |
| echo "To embed the given file(s), add the following lines to your source code:" | |
| for e in $externs; do | |
| echo "extern const char $e;" | |
| done | |
| echo "Then run gcc -o yourprogram $outfile src1.c src2.c..." | |
| fi |
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