檢查 library dependency 的小工具

在開發"手工打造"的 Embedded System 時，可能會遇到library depency 的問題
而我們不見得能一下子就知道這個 library 的 dependency (請使用 ldd or objdump)

愛偷懶的小弟因為懶得算 dependency，就寫了一支小 script 幫我算

它可以把我所指定的程式所依賴的 library 找出來，如果在我的 target 之中沒有它就把它從 library source copy 過來 (這樣就可以找出 library 的最小集合)

它可以搭配其它 script 使用，做到完全自動化計算 library dependency

個人覺得還蠻方便的，分享給大家

File: checklib.sh

#!/bin/bash
# This software may be used and distributed according to the terms
# of the GNU General Public License (GPL), incorporated herein by reference.
# Drivers based on this skeleton fall under the GPL and must retain
# the authorship (implicit copyright) notice.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.

#composer Tick


LIB_SOURCE_PATH="/Project/tank/lib/ /usr/toolchain/arm-linux/arm-linux/lib"
REFERENCE_LIB_PATH="/path to my project rootfs/disk/lib/"
TARGET_LIB_PATH="/path to my project rootfs/disk/lib/"

LIBS=""
for file_tmp in $@;do
FILE=`file $file_tmp`
    if (( `echo $FILE | grep "dynamically linked" | wc -l` == 0 )) ;then
        continue;
    fi
    if [ "`echo $FILE | awk '{print $7}'`" = "80386," ];then
OBJDUMP="objdump"
    else
OBJDUMP="arm-linux-objdump"
    fi
    LIBS+=`${OBJDUMP}  -p $file_tmp   | awk '/NEEDED/ {printf("%s  ",$2); }'`
done

for lib_tmp in $LIBS;do
IS_exist=0
    for SS in ${REFERENCE_LIB_PATH};do
        if (( `find $SS -name ${lib_tmp} | wc -l` > 0));then
IS_exist=1;
            break;
        fi
    done
    if (( ${IS_exist} > 0  )); then
        continue;
    fi
SRC_LIB=""
    for SS in  ${LIB_SOURCE_PATH};do
SRC_LIB="${SRC_LIB} `find ${SS} -name ${lib_tmp}`"
    done
    if [ $SRC_LIB ];then
SRC_BASE=`echo $SRC_LIB | awk '{stop=index($0,".so");ans=substr($0,0,stop-1);print ans}'`
        echo "You are going to copy the following libraries to ${TARGET_LIB_PATH}:"
        echo "cp -av ${SRC_BASE}[0-9.]*[!a] to ${TARGET_LIB_PATH}"
        echo -n "continue? "
        read ans;
        if [ "$ans" = "y" ]  || [ "$ans" = "Y" ];then
            cp -av ${SRC_BASE}[\.0-9\-]*[!a] ${TARGET_LIB_PATH}
        fi
    else
        echo "Warning: I cannot find ${lib_tmp} from the LIB_SOURCE_PATH you set!!"
        echo "It might be missed not in somewhere else."
        echo "Please check if it is not in '${LIB_SOURCE_PATH}'"
    fi
    echo
    echo
done