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1. How to: tcl7.5a1 and tk4.1a1 for Linux ELF

How to compile tcl7.5 and tk4.1 for Linux ELF
---------------------------------------------

The stock tcl7.5a1 unix/configure script isn't set up for Linux ELF.
To fix that, you need to replace the linux shared library entry with
the following (look for "Linux*)" in the script):

    Linux*)
        SHLIB_CFLAGS="-fPIC"
        SHLIB_LD="gcc -shared"
        SHLIB_SUFFIX=".so"
        DL_OBJS="tclLoadDl.o"
        DL_LIBS="-ldl"
        LD_FLAGS=""
        ;;

Edit Makefile.in as follows:

1. Replace the line:  
        CFLAGS = -O
with
        CFLAGS = -O -fPIC

2. If you want to make a dynamically linked tcl shared library, and a
dynamically linked tclsh executable add the following after the "all:"
line:

libtcl7.5.so.1: ${OBJS}
        ${SHLIB_LD} -o libtcl7.5.so.1 ${OBJS}

tclsh-dynamic: ${TCLSH_OBJS} libtcl7.5.so.1
        ${CC} ${LD_FLAGS} ${TCLSH_OBJS} -L. -ltcl7.5 ${DL_LIBS} \
                ${LIBS} ${MATH_LIBS} -o tclsh-dynamic

Then run
     ./configure
     make tclsh-dynamic

Install tclsh-dynamic as tclsh7.5 in your binary directory, and install
libtcl7.5.so.1 in your library directory, and inform your loader about
it with:
   /sbin/ldconfig

To make tk4.1a1 (AFTER installing libtcl7.5.so.1): unpack it in the
same directory in which you've unpacked tcl7.5.  Edit Makefile.in as
follows:

1. Replace the line:

with:

2. Replace the line:  
        CFLAGS = -O
with
        CFLAGS = -O -fPIC

3. If you want to make a dynamic tk shared library, and a
dynamically-lined wish executable, add the following after the "all:"
line:

libtk4.1.so.1: ${OBJS}
        ${SHLIB_LD} -o libtk4.1.so.1 ${OBJS}

wish-dynamic: libtk4.1.so.1
        ${CC} ${LD_FLAGS} ${WISH_OBJS} -ltcl7.5 ${DL_LIBS} \
                ${LIBS} ${MATH_LIBS} -o wish-dynamic

Then run
     ./configure
     make wish-dynamic

Install wish-dynamic as wish4.1 in your binary directory, and install
libtk4.1.so.1 in your library directory, and inform the loader about
it with:
   /sbin/ldconfig

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