#!/bin/sh
#
# ===========================================================================
# FILE:         makexp_aix
# TYPE:         standalone executable
# SYSTEM:	AIX 3.2.5 and AIX 4
#
# DESCRIPTION:  This script creates an export list of ALL global symbols
#               from a list of object or archive files.
#
# USAGE:        makexp_aix <OutputFile> "<FirstLine>" <InputFile> ...
#
#               where:
#                      <OutputFile> is the target export list filename.
#                      <FirstLine> is the path/file string to be appended
#                         after the "#!" symbols in the first line of the
#                         export file. Passing "" means deferred resolution.
#                      <InputFile> is an object (.o) or an archive file (.a).
#
# HISTORY:
#               1-Jul-1996  -- added header information
#               Vladimir Marangozov
#
#               28-Jun-1996 -- initial code
#               Vladimir Marangozov           (Vladimir.Marangozov@imag.fr)
# ==========================================================================

# Variables
expFileName=$1
toAppendStr=$2
shift; shift;
inputFiles=$*
automsg="Generated automatically by makexp_aix"
notemsg="NOTE: lists _all_ global symbols defined in the above file(s)."
curwdir=`pwd`

# Create the export file and setup the header info
echo "#!"$toAppendStr > $expFileName
echo "*" >> $expFileName
echo "* $automsg  (`date -u`)" >> $expFileName
echo "*" >> $expFileName
echo "* Base Directory: $curwdir" >> $expFileName
echo "* Input File(s) : $inputFiles" >> $expFileName
echo "*" >> $expFileName
echo "* $notemsg" >> $expFileName
echo "*" >> $expFileName

# Extract the symbol list using 'nm' which produces quite
# different output under AIX 4 than under AIX 3.2.5.
# The following handles both versions by using a common flagset.
# Here are some hidden tricks:
# 1. Use /usr/ccs/bin/nm. Relevant to AIX 3.2.5 which has
#    another version under /usr/ucb/bin/nm.
# 2. Use the -B flag to have a standard BSD representation
#    of the symbol list on both AIX 3.2.5 and AIX 4. The "-B"
#    flag is missing in the AIX 3.2.5 online usage help of 'nm'.
# 3. Use the -x flag to have a hex representation of the symbol
#    values. This fills the leading whitespaces on AIX 4,
#    thus simplifying the sed statement.
# 4. Eliminate all entries except those with either "B", "D"
#    or "T" key letters. We are interested only in the global
#    (extern) BSS, DATA and TEXT symbols. With the same statement
#    we eliminate object member lines relevant to AIX 4.
# 5. Eliminate entries containing a dot. We can have a dot only
#    as a symbol prefix, but such symbols are undefined externs.
# 6. Eliminate everything including the key letter, so that we're
#    left with just the symbol name.
#
/usr/ccs/bin/nm -Bex $inputFiles			\
| sed -e '/ [^BDT] /d' -e '/\./d' -e 's/.* [BDT] //'	\
| sort | uniq >> $expFileName