#!/bin/sh

#

# ldAix ldCmd ldArg ldArg ...

#

# This shell script provides a wrapper for ld under AIX in order to

# create the .exp file required for linking.  Its arguments consist

# of the name and arguments that would normally be provided to the

# ld command.  This script extracts the names of the object files

# from the argument list, creates a .exp file describing all of the

# symbols exported by those files, and then invokes "ldCmd" to

# perform the real link.

#

# RCS: @(#) $Id: ldAix,v 1.4 2002/09/27 01:28:26 hobbs Exp $

# Extract from the arguments the names of all of the object files.

args=$*

ofiles=""

for i do

    x=`echo $i | grep '[^.].o$'`

    if test "$x" != ""; then

	ofiles="$ofiles $i"

    fi

done

# Extract the name of the object file that we're linking.

outputFile=`echo $args | sed -e 's/.*-o \([^ ]*\).*/\1/'`

# Create the export file from all of the object files, using nm followed

# by sed editing.  Here are some tricky aspects of this:

#

# 1. Nm produces different output under AIX 4.1 than under AIX 3.2.5;

#    the following statements handle both versions.

# 2. Use the -g switch to nm instead of -e under 4.1 (this shows just

#    externals, not statics;  -g isn't available under 3.2.5, though).

# 3. Use the -X32_64 switch to nm on AIX-4+ to handle 32 or 64bit compiles.

# 4. Eliminate lines that end in ":": these are the names of object

#    files (relevant in 4.1 only).

# 5. Eliminate entries with the "U" key letter;  these are undefined

#    symbols (relevant in 4.1 only).

# 6. Eliminate lines that contain the string "0|extern" preceded by space;

#    in 3.2.5, these are undefined symbols (address 0).

# 7. Eliminate lines containing the "unamex" symbol.  In 3.2.5, these

#    are also undefined symbols.

# 8. If a line starts with ".", delete the leading ".", since this will

#    just cause confusion later.

# 9. Eliminate everything after the first field in a line, so that we're

#    left with just the symbol name.

nmopts="-g -C"

osver=`uname -v`

if test $osver -eq 3; then

  nmopts="-e"

fi

if test $osver -gt 3; then

  nmopts="$nmopts -X32_64"

fi

rm -f lib.exp

echo "#! $outputFile" >lib.exp

/usr/ccs/bin/nm $nmopts -h $ofiles | sed -e '/:$/d' -e '/ U /d' -e '/[ 	]0|extern/d' -e '/unamex/d' -e 's/^\.//' -e 's/[ 	|].*//' | sort | uniq >>lib.exp

# If we're linking a .a file, then link all the objects together into a 

# single file "shr.o" and then put that into the archive.  Otherwise link 

# the object files directly into the .a file.

outputFile=`echo $args | sed -e 's/.*-o \([^ ]*\).*/\1/'`

noDotA=`echo $outputFile | sed -e '/\.a$/d'`

echo "noDotA=\"$noDotA\""

if test "$noDotA" = "" ; then

    linkArgs=`echo $args | sed -e 's/-o .*\.a /-o shr.o /'`

    echo $linkArgs

    eval $linkArgs

    echo ar cr $outputFile shr.o

    ar cr $outputFile shr.o

    rm -f shr.o

else

    eval $args

fi