1 ?RCS: $Id: libperl.U,v $
3 ?RCS: Copyright (c) 1996-1998, Andy Dougherty
5 ?RCS: You may distribute under the terms of either the GNU General Public
6 ?RCS: License or the Artistic License, as specified in the README file.
8 ?MAKE:libperl useshrplib shrpenv ldlibpthname: \
9 Myread Oldconfig archlibexp awk cat libc \
10 _a osname osvers so patchlevel subversion usedl ld \
11 ccdlflags installarchlib userelocatableinc
12 ?MAKE: -pick wipe $@ %<
14 ?S: The perl executable is obtained by linking perlmain.c with
15 ?S: libperl, any static extensions (usually just DynaLoader),
16 ?S: and any other libraries needed on this system. libperl
17 ?S: is usually libperl.a, but can also be libperl.so.xxx if
18 ?S: the user wishes to build a perl executable with a shared
22 ?S: This variable is set to 'true' if the user wishes
23 ?S: to build a shared libperl, and 'false' otherwise.
26 ?S: If the user builds a shared libperl.so, then we need to tell the
27 ?S: 'perl' executable where it will be able to find the installed libperl.so.
28 ?S: One way to do this on some systems is to set the environment variable
29 ?S: LD_RUN_PATH to the directory that will be the final location of the
30 ?S: shared libperl.so. The makefile can use this with something like
31 ?S: $shrpenv $(CC) -o perl perlmain.o $libperl $libs
32 ?S: Typical values are
33 ?S: shrpenv="env LD_RUN_PATH=$archlibexp/CORE"
36 ?S: See the main perl Makefile.SH for actual working usage.
37 ?S: Alternatively, we might be able to use a command line option such
38 ?S: as -R $archlibexp/CORE (Solaris) or -Wl,-rpath
39 ?S: $archlibexp/CORE (Linux).
42 ?S: This variable holds the name of the shared library
43 ?S: search path, often LD_LIBRARY_PATH. To get an empty
44 ?S: string, the hints file must set this to 'none'.
46 ?T:shrpdir majonly majmin also xxx tmp_shrpenv
47 ?X: metalint gets confused and thinks we're actually setting LDOPTS
51 ?LINT:extern LD_RUN_PATH
52 ?LINT:change LD_RUN_PATH
53 ?LINT:change ccdlflags
54 ?LINT:extern maintloc maintname
56 : Do we want a shared libperl?
60 # No dynamic loading being used, so don't bother even to prompt.
63 *) case "$useshrplib" in
65 svr4*|nonstopux|dgux|dynixptx|esix|powerux|haiku|cygwin*)
67 also='Building a shared libperl is required for dynamic loading to work on your system.'
81 The perl executable is normally obtained by linking perlmain.c with
82 libperl${_a}, any static extensions (usually just DynaLoader), and
83 any other libraries needed on this system (such as -lm, etc.). Since
84 your system supports dynamic loading, it is probably possible to build
85 a shared libperl.$so. If you will have more than one executable linked
86 to libperl.$so, this will significantly reduce the size of each
87 executable, but it may have a noticeable effect on performance. The
88 default is probably sensible for your system.
92 rp="Build a shared libperl.$so (y/n)"
97 *) useshrplib='false' ;;
102 case "$useshrplib" in
104 case "$userelocatableinc" in
106 echo "Cannot build with both -Duserelocatableinc and -Duseshrplib" >&4
107 echo "See INSTALL for an explanation why that won't work." >&4
113 # Figure out a good name for libperl.so. Since it gets stored in
114 # a version-specific architecture-dependent library, the version
115 # number isn't really that important, except for making cc/ld happy.
117 # A name such as libperl.so.10.1
118 majmin="libperl.$so.$patchlevel.$subversion"
119 # A name such as libperl.so.100
120 majonly=`echo $patchlevel $subversion |
121 $awk '{printf "%d%02d", $1, $2}'`
122 majonly=libperl.$so.$majonly
123 # I'd prefer to keep the os-specific stuff here to a minimum, and
124 # rely on figuring it out from the naming of libc.
125 case "${osname}${osvers}" in
126 *linux*|gnu*) # ld won't link with a bare -lperl otherwise.
129 cygwin*) # ld links now against the dll directly
130 majmin="cygperl5_${patchlevel}_${subversion}.${so}"
131 majonly=`echo $patchlevel $subversion |
132 $awk '{printf "%03d%03d", $1, $2}'`
133 majonly=cygperl5.$majonly.$so
136 *) # Try to guess based on whether libc has major.minor.
138 *libc.$so.[0-9]*.[0-9]*) dflt=$majmin ;;
139 *libc.$so.[0-9]*) dflt=$majonly ;;
140 *) dflt=libperl.$so ;;
150 I need to select a good name for the shared libperl. If your system uses
151 library names with major and minor numbers, then you might want something
152 like $majmin. Alternatively, if your system uses a single version
153 number for shared libraries, then you might want to use $majonly.
154 Or, your system might be quite happy with a simple libperl.$so.
156 Since the shared libperl will get installed into a version-specific
157 architecture-dependent directory, the version number of the shared perl
158 library probably isn't important, so the default should be o.k.
161 rp='What name do you want to give to the shared libperl?'
164 echo "Ok, I'll use $libperl"
167 libperl="libperl${_a}"
171 # Detect old use of shrpdir via undocumented Configure -Dshrpdir
175 WARNING: Use of the shrpdir variable for the installation location of
176 the shared $libperl is not supported. It was never documented and
177 will not work in this version. Let me (<$maintloc>)
178 know of any problems this may cause.
184 But your current setting of $shrpdir is
185 the default anyway, so it's harmless.
190 Further, your current attempted setting of $shrpdir
191 conflicts with the value of $archlibexp/CORE
192 that installperl will use.
199 # How will the perl executable find the installed shared $libperl?
200 # Add $xxx to ccdlflags.
201 # If we can't figure out a command-line option, use $shrpenv to
202 # set env LD_RUN_PATH. The main perl makefile uses this.
203 shrpdir=$archlibexp/CORE
206 if "$useshrplib"; then
209 # We'll set it in Makefile.SH...
214 freebsd|mirbsd|netbsd|openbsd|interix|dragonfly|bitrig)
217 bsdos|linux|irix*|dec_osf|gnu*)
218 xxx="-Wl,-rpath,$shrpdir"
221 # Haiku doesn't like the default, either.
224 # hpux doesn't like the default, either.
225 tmp_shrpenv="env LDOPTS=\"+s +b${shrpdir}\""
228 # cygwin needs only ldlibpth
231 tmp_shrpenv="env LD_RUN_PATH=$shrpdir"
237 # Only add $xxx if it isn't already in ccdlflags.
238 case " $ccdlflags " in
240 *) ccdlflags="$ccdlflags $xxx"
243 Adding $xxx to the flags
244 passed to $ld so that the perl executable will find the
245 installed shared $libperl.
253 # Fix ccdlflags in AIX for building external extensions.
254 # (For building Perl itself bare -bE:perl.exp is needed,
255 # Makefile.SH takes care of this.)
257 aix) ccdlflags="$ccdlflags -bE:$installarchlib/CORE/perl.exp" ;;
259 # Respect a hint or command-line value.
261 '') shrpenv="$tmp_shrpenv" ;;
263 case "$ldlibpthname" in
264 '') ldlibpthname=LD_LIBRARY_PATH ;;
265 none) ldlibpthname='' ;;