%general-entities; ]> bc &bc-version;

&bc-url;

Bc First, change an internal script to use sed instead of ed: cat > bc/fix-libmath_h << "EOF" #! /bin/bash sed -e '1 s/^/{"/' \ -e 's/$/",/' \ -e '2,$ s/^/"/' \ -e '$ d' \ -i libmath.h sed -e '$ s/$/0}/' \ -i libmath.h EOF Create temporary symbolic links so the package can find the readline library and confirm that its required libncurses library is available. Even though the libraries are in /tools/lib at this point, the system will use /usr/lib at the end of this chapter. ln -sv /tools/lib/libncursesw.so.6 /usr/lib/libncursesw.so.6 ln -sfv libncurses.so.6 /usr/lib/libncurses.so Fix an issue in configure due to missing files in the early stages of LFS: sed -i -e '/flex/s/as_fn_error/: ;; # &/' configure 准备安装 Bc： ./configure --prefix=/usr \ --with-readline \ --mandir=/usr/share/man \ --infodir=/usr/share/info --with-readline This option tells Bc to use the readline library that is already installed on the system rather than using its own readline version. 编译该软件包： make To test bc, run the commands below. There is quite a bit of output, so you may want to redirect it to a file. There are a very small percentage of tests (10 of 12,144) that will indicate a round off error at the last digit. echo "quit" | ./bc/bc -l Test/checklib.b 安装该软件包： make install 安装的程序 bc and dc 简要描述 bc A command line calculator bc dc A reverse-polish command line calculator dc