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/Modules/ld_so_aix

http://unladen-swallow.googlecode.com/
Shell | 190 lines | 81 code | 20 blank | 89 comment | 10 complexity | 83475aef231af282a7e339ff5b52ca1a MD5 | raw file
  1#!/bin/sh
  2#
  3#   ========================================================================
  4#   FILE:           ld_so_aix
  5#   TYPE:           executable, uses makexp_aix
  6#   SYSTEM:         AIX
  7#
  8#   DESCRIPTION:    Creates a shareable .o from a set of pre-compiled 
  9#                   (unshared) .o files
 10#
 11#   USAGE:          ld_so_aix [CC] [arguments]
 12#
 13#   ARGUMENTS:      Same as for "ld". The following arguments are processed
 14#                   or supplied by this script (those marked with an asterisk
 15#                   can be overriden from command line):
 16#
 17#                       Argument                     Default value
 18#                   (*) -o [OutputFileName]          -o shr.o
 19#                   (*) -e [EntryPointLabel]         -e init[OutputBaseName]
 20#                   (*) -bE:[ExportFile]             -bE:[OutputBaseName].exp
 21#                   (*) -bI:[ImportFile]             -bI:./python.exp
 22#                       -bM:[ModuleType]             -bM:SRE
 23#                       -bhalt:[Number]              -bhalt:4
 24#                       -T[Number]                   -T512
 25#                       -H[Number]                   -H512
 26#                       -lm
 27#
 28#                   The compiler specific ("-lc" or "-lc_r", "-lpthreads",...)
 29#                   arguments will be automatically passed to "ld" according
 30#                   to the CC command provided as a first argument to this
 31#                   script. Usually, the same CC command was used to produce
 32#                   the pre-compiled .o file(s).
 33#
 34#   NOTES:          1.  Since "ld_so_aix" was originally written for building
 35#                       shared modules for the Python interpreter, the -e and
 36#                       -bI default values match Python's conventions. In
 37#                       Python, the entry point for a shared module is based
 38#                       on the module's name (e.g., the "mathmodule" will
 39#                       expect an  entry point of "initmath").
 40#                   2.  The script accepts multiple .o or .a input files and
 41#                       creates a single (shared) output file. The export list
 42#                       that is created is based on the output file's basename
 43#                       with the suffix ".exp".
 44#                   3.  The resulting shared object file is left in the
 45#                       current directory.
 46#                   4.  Uncommenting the "echo" lines gives detailed output
 47#                       about the commands executed in the script.
 48#
 49#                       
 50#   HISTORY:        Oct-1996    -- Support added for multiple .o files --
 51#                               -- and optional arguments processing.  --
 52#                   Chris Myers (myers@tc.cornell.edu), Keith Kwok
 53#                   (kkwok@tc.cornell.edu) and Vladimir Marangozov
 54#
 55#                   Aug-6-1996  -- Take care of the compiler specific  --
 56#                               -- args by leaving CC to invoke "ld".  --
 57#                   Vladimir Marangozov
 58#
 59#                   Jul-1-1996  -- Make sure to use /usr/ccs/bin/ld    --
 60#                               -- Use makexp_aix for the export list. --
 61#                   Vladimir Marangozov     (Vladimir.Marangozov@imag.fr)
 62#
 63#                   Manus Hand (mhand@csn.net) -- Initial code -- 6/24/96
 64#   ========================================================================
 65#
 66
 67usage="Usage: ld_so_aix [CC command] [ld arguments]"
 68if test ! -n "$*"; then
 69  echo $usage; exit 2
 70fi
 71
 72makexp=`dirname $0`/makexp_aix
 73
 74# Check for existence of compiler.
 75CC=$1; shift
 76whichcc=`which $CC`
 77
 78if test ! -x "$whichcc"; then
 79  echo "ld_so_aix: Compiler '$CC' not found; exiting."
 80  exit 2
 81fi
 82
 83if test ! -n "$*"; then
 84  echo $usage; exit 2
 85fi
 86
 87# Default import file for Python
 88# Can be overriden by providing a -bI: argument.
 89impfile="./python.exp"
 90
 91# Parse arguments
 92while test -n "$1"
 93do
 94  case "$1" in
 95    -e | -Wl,-e)
 96        if test -z "$2"; then
 97	  echo "ld_so_aix: The -e flag needs a parameter; exiting."; exit 2
 98	else
 99	  shift; entry=$1
100	fi
101	;;
102    -e* | -Wl,-e*)
103	entry=`echo $1 | sed -e "s/-Wl,//" -e "s/-e//"`
104	;;
105    -o)
106	if test -z "$2"; then
107	  echo "ld_so_aix: The -o flag needs a parameter; exiting."; exit 2
108	else
109	  shift; objfile=$1
110	fi
111	;;
112    -o*)
113	objfile=`echo $1 | sed "s/-o//"`
114	;;
115    -bI:* | -Wl,-bI:*)
116	impfile=`echo $1 | sed -e "s/-Wl,//" -e "s/-bI://"`
117	;;
118    -bE:* | -Wl,-bE:*)
119	expfile=`echo $1 | sed -e "s/-Wl,//" -e "s/-bE://"`
120	;;
121    *.o | *.a)
122	objs="$objs $1"
123	args="$args $1"
124	;;
125    -bM:* | -Wl,-bM:* | -H* | -Wl,-H* | -T* | -Wl,-T* | -lm)
126	;;
127    *)
128        args="$args $1"
129	;;
130  esac
131  shift
132done
133
134
135if test -z "$objs"; then
136  echo "ld_so_aix: No input files; exiting."
137  exit 2
138elif test ! -r "$impfile"; then
139  echo "ld_so_aix: Import file '$impfile' not found or not readable; exiting."
140  exit 2
141fi
142
143# If -o wasn't specified, assume "-o shr.o"
144if test -z "$objfile"; then
145  objfile=shr.o
146fi
147
148filename=`basename $objfile | sed "s/\.[^.]*$//"`
149
150# If -bE: wasn't specified, assume "-bE:$filename.exp"
151if test -z "$expfile"; then
152  expfile="$filename.exp"
153fi
154
155# Default entry symbol for Python modules = init[modulename]
156# Can be overriden by providing a -e argument.
157if test -z "$entry"; then
158  entry=init`echo $filename | sed "s/module.*//"`
159fi
160
161#echo "ld_so_aix: Debug info section"
162#echo "  -> output file : $objfile"
163#echo "  -> import file : $impfile"
164#echo "  -> export file : $expfile"
165#echo "  -> entry point : $entry"
166#echo "  -> object files: $objs"
167#echo "  -> CC arguments: $args"
168
169CCOPT="-Wl,-e$entry -Wl,-bE:$expfile -Wl,-bI:$impfile -Wl,-bhalt:4"
170CCOPT="$CCOPT -Wl,-bM:SRE -Wl,-T512 -Wl,-H512 -lm -o $objfile"
171# Note: to use dynamic libraries like libtcl8.4.so and libtk8.4.so 
172# you may need to replace the second CCOPT line above with the following:
173# CCOPT="$CCOPT -Wl,-bM:SRE -Wl,-T512 -Wl,-H512 -brtl -bnortllib -lm -o $objfile"
174
175CCARGS="$args"
176
177# Export list generation.
178#echo $makexp $expfile "$objfile" $objs
179$makexp $expfile "$objfile" $objs
180
181# Perform the link.
182#echo $CC $CCOPT $CCARGS
183$CC $CCOPT $CCARGS
184retval=$?
185
186# Delete the module's export list file.
187# Comment this line if you need it.
188rm -f $expfile
189
190exit $retval