Install
    MSys
    MSysDVLPR


m4
    edit config.sub to include msys
    ./configure --prefix=/usr --disable-nls --build=i686-pc-msys
    make
    make install

    
bison
    edit build-aux/config.sub to include msys
    ./configure --prefix=/usr --disable-nls --build=i686-pc-msys
    make
    make install


regex
    ./configure
    make
    ar ru libregex.a regex.o
    install regex.h to msys include directory
    install libregex.a to msys lib directory


flex
    edit config.sub to include msys
    LIBS="-lregex" ./configure --prefix=/usr --disable-nls --build=i686-pc-msys
    make
    make install


Strip files:
    find ./bin -type f -exec strip --strip-all '{}' ';'
    find ./lib -type f -exec strip --strip-debug '{}' ';'