buildroot - 2011.11 交叉編譯器製作時,提示如下錯誤:
“You may have to install 'g++' on your build machine”
還提示:toolchain/dependencies/dependencies.sh 121 Error
打開toolchain/dependencies/dependencies.sh,有如下一段腳本
# check for host CXX
CXXCOMPILER=$(which $HOSTCXX 2> /dev/null)
if [ -z "$CXXCOMPILER" ] ; then
CXXCOMPILER=$(which c++ 2> /dev/null)
fi
if [ -z "$CXXCOMPILER" ] ; then
/bin/echo -e "\nYou may have to install 'g++' on your build machine\n"
#exit 1
fi
if [ ! -z "$CXXCOMPILER" ] ; then
CXXCOMPILER_VERSION=$($CXXCOMPILER -v 2>&1 | sed -n '/^gcc version/p' |
sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q')
if [ -z "$CXXCOMPILER_VERSION" ] ; then
/bin/echo -e "\nYou may have to install 'g++' on your build machine\n"
fi
CXXCOMPILER_MAJOR=$(echo $CXXCOMPILER_VERSION | sed -e "s/\..*//g")
CXXCOMPILER_MINOR=$(echo $CXXCOMPILER_VERSION | sed -e "s/^$CXXCOMPILER_MAJOR\.//g" -e "s/\..*//g")
if [ $CXXCOMPILER_MAJOR -lt 3 -o $CXXCOMPILER_MAJOR -eq 2 -a $CXXCOMPILER_MINOR -lt 95 ] ; then
/bin/echo -e "\nYou have g++ '$CXXCOMPILER_VERSION' installed. g++ >= 2.95 is required\n"
exit 1
fi
fi
有兩個地方會打印“You may have to install 'g++' on your build machine”,在這兩個地方分別加入調試標記,發現是這裏出問題了。
# check for host CXX
CXXCOMPILER=$(which $HOSTCXX 2> /dev/null)
if [ -z "$CXXCOMPILER" ] ; then
CXXCOMPILER=$(which c++ 2> /dev/null)
fi
if [ -z "$CXXCOMPILER" ] ; then
/bin/echo -e "\nYou may have to install 'g++' on your build machine\n"
#exit 1
fi
if [ ! -z "$CXXCOMPILER" ] ; then
CXXCOMPILER_VERSION=$($CXXCOMPILER -v 2>&1 | sed -n '/^gcc version/p' |
sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q')
if [ -z "$CXXCOMPILER_VERSION" ] ; then
/bin/echo -e "\nYou may have to install 'g++' on your build machine\n"
fi
CXXCOMPILER_MAJOR=$(echo $CXXCOMPILER_VERSION | sed -e "s/\..*//g")
CXXCOMPILER_MINOR=$(echo $CXXCOMPILER_VERSION | sed -e "s/^$CXXCOMPILER_MAJOR\.//g" -e "s/\..*//g")
if [ $CXXCOMPILER_MAJOR -lt 3 -o $CXXCOMPILER_MAJOR -eq 2 -a $CXXCOMPILER_MINOR -lt 95 ] ; then
/bin/echo -e "\nYou have g++ '$CXXCOMPILER_VERSION' installed. g++ >= 2.95 is required\n"
exit 1
fi
fi
原來他沒有檢查出來,CXXCOMPILER_VERSION爲空。方便起見,我直接輸入命令:
c++ -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'
得到C++的版本爲:4.4.6
我就直接在CXXCOMPILER_VERSION的判斷上面加一句:CXXCOMPILER_VERSION=4.4.6
然後make,直接通過。
OK,問題解決到此結束!