Tk-8.6.12

Reference: 8.15. Tcl-8.6.12. The tcl/tk package is recommended for python. Fix the build system:

patch -Np1 -i tk8.6.12-bld-20220331.patch

Configure the package:

cd unix
./configure --prefix=/plng \
            CFLAGS="-I/xsys/inc" \
            LDFLAGS="-L/xsys/lib -L/plng/lib" \
            --mandir=/plng/man \
            --includedir=/plng/inc \
            --enable-64bit

Build and install the package:

make
make install