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Diffstat (limited to 'dh_makeshlibs')
| -rwxr-xr-x | dh_makeshlibs | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/dh_makeshlibs b/dh_makeshlibs new file mode 100755 index 00000000..66e8b961 --- /dev/null +++ b/dh_makeshlibs @@ -0,0 +1,268 @@ +#!/usr/bin/perl -w + +=head1 NAME + +dh_makeshlibs - automatically create shlibs file and call dpkg-gensymbols + +=cut + +use strict; +use Debian::Debhelper::Dh_Lib; + +=head1 SYNOPSIS + +B<dh_makeshlibs> [S<I<debhelper options>>] [B<-m>I<major>] [B<-V>I<[dependencies]>] [B<-n>] [B<-X>I<item>] [S<B<--> I<params>>] + +=head1 DESCRIPTION + +B<dh_makeshlibs> is a debhelper program that automatically scans for shared +libraries, and generates a shlibs file for the libraries it finds. + +It also adds a call to ldconfig in the F<postinst> and F<postrm> scripts (in +v3 mode and above only) to any packages in which it finds shared libraries. + +Packages that support multiarch are detected, and +a Pre-Dependency on multiarch-support is set in ${misc:Pre-Depends} ; +you should make sure to put that token into an appropriate place in your +debian/control file for packages supporting multiarch. + +=head1 FILES + +=over 4 + +=item debian/I<package>.symbols + +=item debian/I<package>.symbols.I<arch> + +These symbols files, if present, are passed to L<dpkg-gensymbols(1)> to +be processed and installed. Use the I<arch> specific names if you need +to provide different symbols files for different architectures. + +=back + +=head1 OPTIONS + +=over 4 + +=item B<-m>I<major>, B<--major=>I<major> + +Instead of trying to guess the major number of the library with objdump, +use the major number specified after the -m parameter. This is much less +useful than it used to be, back in the bad old days when this program +looked at library filenames rather than using objdump. + +=item B<-V>, B<-V>I<dependencies> + +=item B<--version-info>, B<--version-info=>I<dependencies> + +By default, the shlibs file generated by this program does not make packages +depend on any particular version of the package containing the shared +library. It may be necessary for you to add some version dependency +information to the shlibs file. If B<-V> is specified with no dependency +information, the current upstream version of the package is plugged into a +dependency that looks like "I<packagename> B<(E<gt>>= I<packageversion>B<)>". Note that in +debhelper compatibility levels before v4, the Debian part of the package +version number is also included. If B<-V> is specified with parameters, the +parameters can be used to specify the exact dependency information needed +(be sure to include the package name). + +Beware of using B<-V> without any parameters; this is a conservative setting +that always ensures that other packages' shared library dependencies are at +least as tight as they need to be (unless your library is prone to changing +ABI without updating the upstream version number), so that if the +maintainer screws up then they won't break. The flip side is that packages +might end up with dependencies that are too tight and so find it harder to +be upgraded. + +=item B<-n>, B<--noscripts> + +Do not modify F<postinst>/F<postrm> scripts. + +=item B<-X>I<item>, B<--exclude=>I<item> + +Exclude files that contain I<item> anywhere in their filename or directory +from being treated as shared libraries. + +=item B<--add-udeb=>I<udeb> + +Create an additional line for udebs in the shlibs file and use I<udeb> as the +package name for udebs to depend on instead of the regular library package. + +=item B<--> I<params> + +Pass I<params> to L<dpkg-gensymbols(1)>. + +=back + +=head1 EXAMPLES + +=over 4 + +=item B<dh_makeshlibs> + +Assuming this is a package named F<libfoobar1>, generates a shlibs file that +looks something like: + libfoobar 1 libfoobar1 + +=item B<dh_makeshlibs -V> + +Assuming the current version of the package is 1.1-3, generates a shlibs +file that looks something like: + libfoobar 1 libfoobar1 (>= 1.1) + +=item B<dh_makeshlibs -V 'libfoobar1 (E<gt>= 1.0)'> + +Generates a shlibs file that looks something like: + libfoobar 1 libfoobar1 (>= 1.0) + +=back + +=cut + +init(options => { + "m=s", => \$dh{M_PARAMS}, + "major=s" => \$dh{M_PARAMS}, + "version-info:s" => \$dh{V_FLAG}, + "add-udeb=s" => \$dh{SHLIBS_UDEB}, +}); + +my $objdump=cross_command("objdump"); +my $multiarch=dpkg_architecture_value("DEB_HOST_MULTIARCH"); + +foreach my $package (@{$dh{DOPACKAGES}}) { + next if is_udeb($package); + + my $tmp=tmpdir($package); + + my %seen; + my $need_ldconfig = 0; + my $is_multiarch = 0; + + doit("rm", "-f", "$tmp/DEBIAN/shlibs"); + + # So, we look for files or links to existing files with names that + # match "*.so.*". And we only look at real files not + # symlinks, so we don't accidentally add shlibs data to -dev + # packages. This may have a few false positives, which is ok, + # because only if we can get a library name and a major number from + # objdump is anything actually added. + my $exclude=''; + my (@udeb_lines, @lib_files); + if (defined($dh{EXCLUDE_FIND}) && $dh{EXCLUDE_FIND} ne '') { + $exclude="! \\( $dh{EXCLUDE_FIND} \\) "; + } + open (FIND, "find $tmp -type f \\( -name '*.so' -or -name '*.so.*' \\) $exclude |"); + while (<FIND>) { + my ($library, $major); + push @lib_files, $_; + if (defined $multiarch && $multiarch ne '' && m,/$multiarch/,) { + $is_multiarch=1; + } + my $ret=`$objdump -p $_`; + if ($ret=~m/\s+SONAME\s+(.+)\.so\.(.+)/) { + # proper soname format + $library=$1; + $major=$2; + } + elsif ($ret=~m/\s+SONAME\s+(.+)-(.+)\.so/) { + # idiotic crap soname format + $library=$1; + $major=$2; + } + + if (defined($dh{M_PARAMS}) && $dh{M_PARAMS} ne '') { + $major=$dh{M_PARAMS}; + } + + if (! -d "$tmp/DEBIAN") { + doit("install","-d","$tmp/DEBIAN"); + } + my $deps=$package; + if ($dh{V_FLAG_SET}) { + if ($dh{V_FLAG} ne '') { + $deps=$dh{V_FLAG}; + } + else { + # Call isnative because it sets $dh{VERSION} + # as a side effect. + isnative($package); + my $version = $dh{VERSION}; + # Old compatibility levels include the + # debian revision, while new do not. + if (! compat(3)) { + # Remove debian version, if any. + $version =~ s/-[^-]+$//; + } + $deps="$package (>= $version)"; + } + } + if (defined($library) && defined($major) && defined($deps) && + $library ne '' && $major ne '' && $deps ne '') { + $need_ldconfig=1; + # Prevent duplicate lines from entering the file. + my $line="$library $major $deps"; + if (! $seen{$line}) { + $seen{$line}=1; + complex_doit("echo '$line' >>$tmp/DEBIAN/shlibs"); + if (defined($dh{SHLIBS_UDEB}) && $dh{SHLIBS_UDEB} ne '') { + my $udeb_deps = $deps; + $udeb_deps =~ s/\Q$package\E/$dh{SHLIBS_UDEB}/e; + $line="udeb: "."$library $major $udeb_deps"; + push @udeb_lines, $line; + } + } + } + } + close FIND; + + # Write udeb: lines last. + foreach (@udeb_lines) { + complex_doit("echo '$_' >>$tmp/DEBIAN/shlibs"); + } + + # New as of dh_v3. + if (! compat(2) && ! $dh{NOSCRIPTS} && $need_ldconfig) { + autoscript($package,"postinst","postinst-makeshlibs"); + autoscript($package,"postrm","postrm-makeshlibs"); + } + + if (-e "$tmp/DEBIAN/shlibs") { + doit("chmod",644,"$tmp/DEBIAN/shlibs"); + doit("chown","0:0","$tmp/DEBIAN/shlibs"); + } + + # dpkg-gensymbols files + my $symbols=pkgfile($package, "symbols"); + if (-e $symbols) { + my @liblist; + if (! compat(7)) { + @liblist=map { "-e$_" } @lib_files; + } + # -I is used rather than using dpkg-gensymbols + # own search for symbols files, since that search + # is not 100% compatible with debhelper. (For example, + # this supports --ignore being used.) + doit("dpkg-gensymbols", "-p$package", "-I$symbols", + "-P$tmp", + @liblist, + @{$dh{U_PARAMS}}); + if (-s "$tmp/DEBIAN/symbols" == 0) { + doit("rm", "-f", "$tmp/DEBIAN/symbols"); + } + } + if ($is_multiarch) { + addsubstvar($package, "misc:Pre-Depends", "multiarch-support"); + } +} + +=head1 SEE ALSO + +L<debhelper(7)> + +This program is a part of debhelper. + +=head1 AUTHOR + +Joey Hess <joeyh@debian.org> + +=cut |