libtool-lite

#!/bin/bash

# This script pretends to be libtool.  And supports
# only a limited set of flags.
#
# It is supposed to be a stand in for libtool -static, whic
# creates a static archive.  This is done by locating all -l<lib>
# libs in the provied -L<lib path> library paths, and building an
# MRI script to create the final archive from all the libraries, and
# other provided inputs.
#

name=${0##*/}
target=${name%-*}

set -e

ldflags_L=()
ldflags_l=()
output=""
inputs=()
STATIC=0
DYNAMIC=1
mode=$DYNAMIC
verbose=0

# find_lib <name> path path path path
function find_lib () {
	lib=$1; shift 1;
	for dir in $@; do
		if [ -f "$dir/$lib" ]; then
			echo "$dir/$lib"
			break
		fi
	done
} 

while [ "$#" -gt 0 ]; do
	case "$1" in
		-v|--verbose) verbose=1; shift 1;;
		-o) output="$2"; shift 2;;
		-L*) ldflags_L+=("${1:2:${#1}-2}"); shift 1;;
		-l*) ldflags_l+=("lib${1:2:${#1}-2}.a"); shift 1;;
		-static) mode=$STATIC; shift 1;;
		-dynamic) mode=$DYNAMIC; shift 1;;
		-Wl,*) ldflags+=("${1#*,}"); shift 1;;
		-*) echo "unknown option: $1" >&2; exit 1;;
		*) inputs+=("$1"); shift 1;;
	esac
done

if [ ! $mode == $STATIC ]; then
	echo "-dynamic not supported!" >&2; exit 1;
fi

MRI="create ${output}\n"
for input in "${ldflags_l[@]}"; do
	lib=$(find_lib $input ${ldflags_L[@]})
	if [ -z $lib ]; then
		echo "Failed to find lib $input" >&2
		exit 1
	else
		MRI+="addlib $lib\n"
		continue
	fi
done
for input in "${inputs[@]}"; do
	MRI+="addmod $input\n"
done
MRI+="save\nend\n"
echo -e "$MRI" | $target-ar -M
$target-ranlib $output