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 overridden 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 $0`/makexp_aix
73test -x "${makexp}" || makexp="@abs_srcdir@/makexp_aix"
74
75# Check for existence of compiler.
76CC=$1; shift
77whichcc=`which $CC`
78
79if test ! -x "$whichcc"; then
80  echo "ld_so_aix: Compiler '$CC' not found; exiting."
81  exit 2
82fi
83
84if test ! -n "$*"; then
85  echo $usage; exit 2
86fi
87
88# Default import file for Python
89# Can be overridden by providing a -bI: argument.
90impfile="./python.exp"
91
92# Parse arguments
93while test -n "$1"
94do
95  case "$1" in
96    -e | -Wl,-e)
97        if test -z "$2"; then
98	  echo "ld_so_aix: The -e flag needs a parameter; exiting."; exit 2
99	else
100	  shift; entry=$1
101	fi
102	;;
103    -e* | -Wl,-e*)
104	entry=`echo $1 | sed -e "s/-Wl,//" -e "s/-e//"`
105	;;
106    -o)
107	if test -z "$2"; then
108	  echo "ld_so_aix: The -o flag needs a parameter; exiting."; exit 2
109	else
110	  shift; objfile=$1
111	fi
112	;;
113    -o*)
114	objfile=`echo $1 | sed "s/-o//"`
115	;;
116    -bI:* | -Wl,-bI:*)
117	impfile=`echo $1 | sed -e "s/-Wl,//" -e "s/-bI://"`
118	;;
119    -bE:* | -Wl,-bE:*)
120	expfile=`echo $1 | sed -e "s/-Wl,//" -e "s/-bE://"`
121	;;
122    *.o | *.a)
123	objs="$objs $1"
124	args="$args $1"
125	;;
126    -bM:* | -Wl,-bM:* | -H* | -Wl,-H* | -T* | -Wl,-T* | -lm)
127	;;
128    *)
129        args="$args $1"
130	;;
131  esac
132  shift
133done
134
135if test "$objfile" = "libpython@VERSION@@ABIFLAGS@.so"; then
136  ldsocoremode="true"
137fi
138
139if test -z "$objs"; then
140  echo "ld_so_aix: No input files; exiting."
141  exit 2
142elif test ! -r "$impfile" -a -z "$ldsocoremode"; then
143  echo "ld_so_aix: Import file '$impfile' not found or not readable; exiting."
144  exit 2
145fi
146
147# If -o wasn't specified, assume "-o shr.o"
148if test -z "$objfile"; then
149  objfile=shr.o
150fi
151
152filename=`basename $objfile | sed "s/\.[^.]*$//"`
153
154# If -bE: wasn't specified, assume "-bE:$filename.exp"
155if test -z "$expfile"; then
156  expfile="$filename.exp"
157fi
158
159# Default entry symbol for Python modules = init[modulename]
160# Can be overridden by providing a -e argument.
161if test -z "$entry"; then
162  entry=PyInit_`echo $filename | sed "s/module.*//"`
163fi
164
165#echo "ld_so_aix: Debug info section"
166#echo "  -> output file : $objfile"
167#echo "  -> import file : $impfile"
168#echo "  -> export file : $expfile"
169#echo "  -> entry point : $entry"
170#echo "  -> object files: $objs"
171#echo "  -> CC arguments: $args"
172
173if test -z "$ldsocoremode"; then
174  CCOPT="-Wl,-e$entry -Wl,-bE:$expfile -Wl,-bI:$impfile -Wl,-bhalt:4"
175else
176  CCOPT="-Wl,-bnoentry -Wl,-bE:$expfile -Wl,-bhalt:4"
177fi
178CCOPT="$CCOPT -Wl,-bM:SRE -Wl,-T512 -Wl,-H512 -Wl,-brtl -Wl,-bnortllib -lm -o $objfile"
179
180CCARGS="$args"
181
182# Export list generation.
183#echo $makexp $expfile "$objfile" $objs
184$makexp $expfile "$objfile" $objs
185
186# Perform the link.
187#echo $CC $CCOPT $CCARGS
188$CC $CCOPT $CCARGS
189retval=$?
190
191# Delete the module's export list file.
192# Comment this line if you need it.
193rm -f $expfile
194
195exit $retval
196