#!/bin/ksh

# Make an AIX EXPORT FILE FOR shared library (tricky!!!)
# Based on a script from Athanasios G. Gaitatzes (gaitat@vnet.ibm.com)
# Improved by Greg Thompson <gregt@visix.com> -gt
#
# Improved by Sven Goethel <s_goethel@bielefeld.netsurf.de>
# 	goal: same tool for any machines ...
# 	

# First argument is name of output library
# 	without dirname and suffix
#
# Rest of arguments are object files WHICH SHOULD BE IN THE EXPORT LIST !!
#


# Name of the library which clients will link with (ex: libMesaGL)
BASENAME=$1

# BASENAME = LIBRARY without .a suffix
LIBRARY=${BASENAME}.so

# Name of exports file
EXPFILE=${BASENAME}.exp

# List of object files to put into library
shift 1
OBJECTS=$*


# Remove any old files from previous make
rm -f ${EXPFILE}

# Pick a way to use nm -gt
NM=${NM-/bin/nm -eC}

# Determine which version of AIX this is
AIXVERSION=`uname -v`

# Make exports (.exp) file header
echo "#! ${LIBRARY}" > ${EXPFILE}

# Append list of exported symbols to exports file -gt
case ${AIXVERSION}
{
    3*)
	${NM} ${OBJECTS} | awk -F'|' '{
	    if ($3 != "extern" || substr($7,1,1) == " ") continue
	    sub ("  *", "", $1); sub ("  *", "", $7)
	    if ( (($7 == ".text") || ($7 == ".data") || ($7 == ".bss"))  \
		    && ( substr($1,1,1) != ".")) {
		if (substr ($1, 1, 7) != "__sinit" &&
			substr ($1, 1, 7) != "__sterm") {
		    if (substr ($1, 1, 5) == "__tf1")
			print (substr ($1, 7))
		    else if (substr ($1, 1, 5) == "__tf9")
			print (substr ($1, 15))
		    else
			print $1
		}
	    }
	}' | sort -u >> ${EXPFILE}
	;;

    4*)
	${NM} ${OBJECTS} | awk '{
	    if ((($2 == "T") || ($2 == "D") || ($2 == "B")) \
		    && ( substr($1,1,1) != ".")) {
		if (substr ($1, 1, 7) != "__sinit" &&
			substr ($1, 1, 7) != "__sterm") {
		    if (substr ($1, 1, 5) == "__tf1")
			print (substr ($1, 7))
		    else if (substr ($1, 1, 5) == "__tf9")
			print (substr ($1, 15))
		    else
			print $1
		}
	    }
	}' | sort -u >> ${EXPFILE}
	;;
}

# This next line is a hack to allow full compatibility with IBM's OpenGL
# libraries.  IBM mistakenly exports glLoadIdentity from the libGLU.a
# library.  We have to do the same thing.  Problem reported by Yemi Adesanya
# (adesanya@afsmail.cern.ch) and Patrick Brown (pbrown@austin.ibm.com)
if [ "${BASENAME}" = libMesaGLU ] ; then
    echo "glLoadIdentity" >> ${EXPFILE}
fi