package ExtUtils::Liblist;
-require ExtUtils::MakeMaker; # currently for MM_Unix::lsdir
# Broken out of MakeMaker from version 4.11
use Config;
use Cwd;
-# --- Determine libraries to use and how to use them ---
+use File::Basename;
+
+my $Config_libext = $Config{lib_ext} || ".a";
sub ext {
- my($potential_libs, $Verbose) = @_;
- return ("", "", "") unless $potential_libs;
- print STDOUT "Potential libraries are '$potential_libs':" if $Verbose;
+ my($self,$potential_libs, $Verbose) = @_;
+ if ($Config{osname} =~ m|^os/?2$|i and $Config{libs}) {
+ # Dynamic libraries are not transitive, so we may need including
+ # the libraries linked against perl.dll again.
+
+ $potential_libs .= " " if $potential_libs;
+ $potential_libs .= $Config{libs};
+ }
+ return ("", "", "", "") unless $potential_libs;
+ print STDOUT "Potential libraries are '$potential_libs':\n" if $Verbose;
my($so) = $Config{'so'};
my($libs) = $Config{'libs'};
my(@searchpath); # from "-L/path" entries in $potential_libs
my(@libpath) = split " ", $Config{'libpth'};
- my(@ldloadlibs, @bsloadlibs, @extralibs);
+ my(@ldloadlibs, @bsloadlibs, @extralibs, @ld_run_path, %ld_run_path_seen);
my($fullname, $thislib, $thispth, @fullname);
my($pwd) = fastcwd(); # from Cwd.pm
my($found) = 0;
# For gcc-2.6.2 on linux (March 1995), DLD can not load
# .sa libraries, with the exception of libm.sa, so we
# deliberately skip them.
- if (@fullname = MM_Unix::lsdir($thispth,"^lib$thislib\.$so\.[0-9]+")){
+ if (@fullname = $self->lsdir($thispth,"^lib$thislib\.$so\.[0-9]+")){
# Take care that libfoo.so.10 wins against libfoo.so.9.
# Compare two libraries to find the most recent version
# number. E.g. if you have libfoo.so.9.0.7 and
$mb cmp $ma;} @fullname)[0];
} elsif (-f ($fullname="$thispth/lib$thislib.$so")
&& (($Config{'dlsrc'} ne "dl_dld.xs") || ($thislib eq "m"))){
- } elsif (-f ($fullname="$thispth/lib${thislib}_s.a")
+ } elsif (-f ($fullname="$thispth/lib${thislib}_s$Config_libext")
&& ($thislib .= "_s") ){ # we must explicitly use _s version
- } elsif (-f ($fullname="$thispth/lib$thislib.a")){
- } elsif (-f ($fullname="$thispth/Slib$thislib.a")){
+ } elsif (-f ($fullname="$thispth/lib$thislib$Config_libext")){
+ } elsif (-f ($fullname="$thispth/$thislib$Config_libext")){
+ } elsif (-f ($fullname="$thispth/Slib$thislib$Config_libext")){
+ } elsif ($Config{'osname'} eq 'dgux'
+ && -l ($fullname="$thispth/lib$thislib$Config_libext")
+ && readlink($fullname) =~ /^elink:/) {
+ # Some of DG's libraries look like misconnected symbolic
+ # links, but development tools can follow them. (They
+ # look like this:
+ #
+ # libm.a -> elink:${SDE_PATH:-/usr}/sde/\
+ # ${TARGET_BINARY_INTERFACE:-m88kdgux}/usr/lib/libm.a
+ #
+ # , the compilation tools expand the environment variables.)
} else {
- print STDOUT "$thislib not found in $thispth" if $Verbose;
+ print STDOUT "$thislib not found in $thispth\n" if $Verbose;
next;
}
- print STDOUT "'-l$thislib' found at $fullname" if $Verbose;
+ print STDOUT "'-l$thislib' found at $fullname\n" if $Verbose;
+ my($fullnamedir) = dirname($fullname);
+ push @ld_run_path, $fullnamedir unless $ld_run_path_seen{$fullnamedir}++;
$found++;
$found_lib++;
# Now update library lists
# what do we know about this library...
- my $is_dyna = ($fullname !~ /\.a$/);
- my $in_perl = ($libs =~ /\B-l${thislib}\b/s);
+ my $is_dyna = ($fullname !~ /\Q$Config_libext\E$/);
+ my $in_perl = ($libs =~ /\B-l\Q$ {thislib}\E\b/s);
# Do not add it into the list if it is already linked in
# with the main perl executable.
}
last; # found one here so don't bother looking further
}
- print STDOUT "Warning (non-fatal): No library found for -l$thislib"
+ print STDOUT "Warning (will try anyway): No library found for -l$thislib\n"
unless $found_lib>0;
}
- return ('','','') unless $found;
- ("@extralibs", "@bsloadlibs", "@ldloadlibs");
+ return ('','','','') unless $found;
+ ("@extralibs", "@bsloadlibs", "@ldloadlibs",join(":",@ld_run_path));
}
-
1;
+
+__END__
+
+=head1 NAME
+
+ExtUtils::Liblist - determine libraries to use and how to use them
+
+=head1 SYNOPSIS
+
+C<require ExtUtils::Liblist;>
+
+C<ExtUtils::Liblist::ext($potential_libs, $Verbose);>
+
+=head1 DESCRIPTION
+
+This utility takes a list of libraries in the form C<-llib1 -llib2
+-llib3> and prints out lines suitable for inclusion in an extension
+Makefile. Extra library paths may be included with the form
+C<-L/another/path> this will affect the searches for all subsequent
+libraries.
+
+It returns an array of four scalar values: EXTRALIBS, BSLOADLIBS,
+LDLOADLIBS, and LD_RUN_PATH.
+
+Dependent libraries can be linked in one of three ways:
+
+=over 2
+
+=item * For static extensions
+
+by the ld command when the perl binary is linked with the extension
+library. See EXTRALIBS below.
+
+=item * For dynamic extensions
+
+by the ld command when the shared object is built/linked. See
+LDLOADLIBS below.
+
+=item * For dynamic extensions
+
+by the DynaLoader when the shared object is loaded. See BSLOADLIBS
+below.
+
+=back
+
+=head2 EXTRALIBS
+
+List of libraries that need to be linked with when linking a perl
+binary which includes this extension Only those libraries that
+actually exist are included. These are written to a file and used
+when linking perl.
+
+=head2 LDLOADLIBS and LD_RUN_PATH
+
+List of those libraries which can or must be linked into the shared
+library when created using ld. These may be static or dynamic
+libraries. LD_RUN_PATH is a colon separated list of the directories
+in LDLOADLIBS. It is passed as an environment variable to the process
+that links the shared library.
+
+=head2 BSLOADLIBS
+
+List of those libraries that are needed but can be linked in
+dynamically at run time on this platform. SunOS/Solaris does not need
+this because ld records the information (from LDLOADLIBS) into the
+object file. This list is used to create a .bs (bootstrap) file.
+
+=head1 PORTABILITY
+
+This module deals with a lot of system dependencies and has quite a
+few architecture specific B<if>s in the code.
+
+=head1 SEE ALSO
+
+L<ExtUtils::MakeMaker>
+
+=cut
+
+
+
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