%general-entities; ]> Flex Prepare Flex for compilation: ./configure --prefix=/usr Compile the package: make To test the results, issue: make check Install the package: make install There are some packages that expect to find the lex library in /usr/lib. Create a symlink to account for this: ln -sv libfl.a /usr/lib/libl.a A few programs do not know about flex yet and try to run its predecessor, lex. To support those programs, create a wrapper script named lex that calls flex in lex emulation mode: cat > /usr/bin/lex << "EOF" #!/bin/sh # Begin /usr/bin/lex exec /usr/bin/flex -l "$@" # End /usr/bin/lex EOF chmod -v 755 /usr/bin/lex Installed programs Installed libraries flex, flex++, and lex libfl.[a,so] and libfl_pic.[a,so] Short Descriptions flex A tool for generating programs that recognize patterns in text; it allows for the versatility to specify the rules for pattern-finding, eradicating the need to develop a specialized program flex flex++ Link to flex which makes it generate C++ scanner classes flex++ lex A script that runs flex in lex emulation mode lex libfl The flex library libfl libfl_pic The flex library libfl_pic