Redo and enhance the support for building shared libraries. Currently

there's support for building under Linux and True64 (using examples
from the programming manuals), including versioning that is currently
the same as OpenSSL versions but should really be a different series.

With this change, it's up to the users to decide if they want shared
libraries as well as the static ones.  This decision now has to be
done at configuration time (well, not really, those who know what they
do can still do it the same way as before).

The OpenSSL programs (openssl and the test programs) are currently
always linked statically, but this may change in the future in a
configurable manner.  The necessary makefile variables to enable this
are in place.

Also note that I have done absolutely nothing about the Windows target
to get something similar.  On the other hand, DLLs are already the
default there, but without versioning, and I've no idea what the
possibilities for such a thing are there...

1 files changed, 46 insertions, 8 deletions

diff --git a/Configure b/Configure
index 94f4d6556d..cf5fe2007e 100755
--- a/Configure
+++ b/Configure
@@ -27,6 +27,8 @@ my $usage="Usage: Configure [no-<cipher> ...] [-Dxxx] [-lxxx] [-Lxxx] [-fxxx] [-
 # [no-]threads  [don't] try to create a library that is suitable for
 #               multithreaded applications (default is "threads" if we
 #               know how to do it)
+# [no-]shared	[don't] try to create shared libraries instead of static
+#		ones when possible.
 # no-asm        do not use assembler
 # no-dso        do not compile in any native shared-library methods. This
 #               will ensure that all methods just return NULL.
@@ -91,7 +93,7 @@ my $x86_bsdi_asm="asm/bn86bsdi.o asm/co86bsdi.o:asm/dx86bsdi.o asm/yx86bsdi.o:as
 # -DB_ENDIAN slows things down on a sparc for md5, but helps sha1.
 # So the md5_locl.h file has an undef B_ENDIAN if sun is defined
 
-#config-string	$cc : $cflags : $unistd : $thread_cflag : $lflags : $bn_ops : $bn_obj : $des_obj : $bf_obj : $md5_obj : $sha1_obj : $cast_obj : $rc4_obj : $rmd160_obj : $rc5_obj : $dso_scheme
+#config-string	$cc : $cflags : $unistd : $thread_cflag : $lflags : $bn_ops : $bn_obj : $des_obj : $bf_obj : $md5_obj : $sha1_obj : $cast_obj : $rc4_obj : $rmd160_obj : $rc5_obj : $dso_scheme : $shared_target : $shared_cflag
 
 my %table=(
 #"b",		"${tcc}:${tflags}::${tlib}:${bits1}:${tbn_mul}::",
@@ -245,9 +247,9 @@ my %table=(
 # Dec Alpha, OSF/1 - the alpha164-cc is the flags for a 21164A with
 # the new compiler
 # For gcc, the following gave a %50 speedup on a 164 over the 'DES_INT' version
-"alpha-gcc","gcc:-O3::(unknown)::SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_UNROLL DES_RISC1:asm/alpha.o:::::::::dlfcn",
-"alpha-cc", "cc:-std1 -tune host -O4 -readonly_strings::(unknown)::SIXTY_FOUR_BIT_LONG RC4_CHUNK:asm/alpha.o:::::::::dlfcn",
-"alpha164-cc", "cc:-std1 -tune host -fast -readonly_strings::(unknown)::SIXTY_FOUR_BIT_LONG RC4_CHUNK:asm/alpha.o::",
+"alpha-gcc","gcc:-O3::(unknown)::SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_UNROLL DES_RISC1:asm/alpha.o:::::::::dlfcn:true64-shared",
+"alpha-cc", "cc:-std1 -tune host -O4 -readonly_strings::(unknown)::SIXTY_FOUR_BIT_LONG RC4_CHUNK:asm/alpha.o:::::::::dlfcn:true64-shared",
+"alpha164-cc", "cc:-std1 -tune host -fast -readonly_strings::(unknown)::SIXTY_FOUR_BIT_LONG RC4_CHUNK:asm/alpha.o:::::::::dlfcn:true64-shared",
 "FreeBSD-alpha","gcc:-DTERMIOS -O3 -fomit-frame-pointer::(unknown)::SIXTY_FOUR_BIT_LONG RC4_CHUNK DES_INT DES_PTR DES_RISC2:::",
 
 #### Alpha Linux with GNU C and Compaq C setups
@@ -273,7 +275,7 @@ my %table=(
 
 # The intel boxes :-), It would be worth seeing if bsdi-gcc can use the
 # bn86-elf.o file file since it is hand tweaked assembler.
-"linux-elf",	"gcc:-DL_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -m486 -Wall::-D_REENTRANT:-ldl:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn",
+"linux-elf",	"gcc:-DL_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -m486 -Wall::-D_REENTRANT:-ldl:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn:linux-shared:-fPIC",
 "debug-linux-elf","gcc:-DREF_CHECK -DBN_CTX_DEBUG -DCRYPTO_MDEBUG -DL_ENDIAN -DTERMIO -g -m486 -Wall::-D_REENTRANT:-lefence:BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn",
 "debug-linux-elf-noefence","gcc:-DREF_CHECK -DBN_CTX_DEBUG -DCRYPTO_MDEBUG -DL_ENDIAN -DTERMIO -g -m486 -Wall::-D_REENTRANT::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_elf_asm}:dlfcn",
 "linux-aout",	"gcc:-DL_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -m486 -Wall::(unknown)::BN_LLONG ${x86_gcc_des} ${x86_gcc_opts}:${x86_out_asm}",
@@ -294,7 +296,7 @@ my %table=(
 "ncr-scde","cc:-O6 -Xa -Hoff=BEHAVED -686 -Hwide -Hiw::(unknown):-lsocket -lnsl:${x86_gcc_des} ${x86_gcc_opts}:::",
 
 # Linux on ARM
-"linux-elf-arm","gcc:-DL_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -Wall::-D_REENTRANT::BN_LLONG::::::::::dlfcn",
+"linux-elf-arm","gcc:-DL_ENDIAN -DTERMIO -O3 -fomit-frame-pointer -Wall::-D_REENTRANT::BN_LLONG::::::::::dlfcn:linux-shared:-fPIC",
 
 # UnixWare 2.0
 "unixware-2.0","cc:-O -DFILIO_H::(unknown):-lsocket -lnsl:${x86_gcc_des} ${x86_gcc_opts}:::",
@@ -394,6 +396,7 @@ my $prefix="";
 my $openssldir="";
 my $install_prefix="";
 my $no_threads=0;
+my $no_shared=1;
 my $threads=0;
 my $no_asm=0;
 my $no_dso=0;
@@ -451,6 +454,10 @@ foreach (@ARGV)
 		{ $no_threads=1; }
 	elsif (/^threads$/)
 		{ $threads=1; }
+	elsif (/^no-shared$/)
+		{ $no_shared=1; }
+	elsif (/^shared$/)
+		{ $no_shared=0; }
 	elsif (/^no-symlinks$/)
 		{ $symlink=0; }
 	elsif (/^no-(.+)$/)
@@ -557,8 +564,8 @@ $openssldir=$prefix . "/" . $openssldir if $openssldir !~ /^\//;
 print "IsWindows=$IsWindows\n";
 
 (my $cc,my $cflags,my $unistd,my $thread_cflag,my $lflags,my $bn_ops,my $bn_obj,my $des_obj,my $bf_obj,
- $md5_obj,$sha1_obj,my $cast_obj,my $rc4_obj,$rmd160_obj,my $rc5_obj,my $dso_scheme)=
-	split(/\s*:\s*/,$table{$target} . ":" x 20 , -1);
+ $md5_obj,$sha1_obj,my $cast_obj,my $rc4_obj,$rmd160_obj,my $rc5_obj,my $dso_scheme,my $shared_target,my $shared_cflag)=
+	split(/\s*:\s*/,$table{$target} . ":" x 21 , -1);
 $cflags="$flags$cflags" if ($flags ne "");
 
 # The DSO code currently always implements all functions so that no
@@ -632,6 +639,16 @@ if ($threads)
 		$openssl_thread_defines .= $thread_defines;
 	}
 
+if ($no_shared)
+	{
+	$shared_target = "";
+	$shared_cflag = "";
+	}
+else
+	{
+	$cflags = "$shared_cflag $cflags";
+	}
+
 #my ($bn1)=split(/\s+/,$bn_obj);
 #$bn1 = "" unless defined $bn1;
 #$bn1=$bn_asm unless ($bn1 =~ /\.o$/);
@@ -663,13 +680,20 @@ if ($rmd160_obj =~ /\.o$/)
 my $version = "unknown";
 my $major = "unknown";
 my $minor = "unknown";
+my $shlib_version_number = "unknown";
+my $shlib_version_history = "unknown";
+my $shlib_major = "unknown";
+my $shlib_minor = "unknown";
 
 open(IN,'<crypto/opensslv.h') || die "unable to read opensslv.h:$!\n";
 while (<IN>)
 	{
 	$version=$1 if /OPENSSL.VERSION.TEXT.*OpenSSL (\S+) /;
+	$shlib_version_number=$1 if /SHLIB_VERSION_NUMBER *"([^"]+)"/;
+	$shlib_version_history=$1 if /SHLIB_VERSION_HISTORY *"([^"]*)"/;
 	}
 close(IN);
+if ($shlib_version_history ne "") { $shlib_version_history .= ":"; }
 
 if ($version =~ /(^[0-9]*)\.([0-9\.]*)/)
 	{
@@ -677,6 +701,12 @@ if ($version =~ /(^[0-9]*)\.([0-9\.]*)/)
 	$minor=$2;
 	}
 
+if ($shlib_version_number =~ /(^[0-9]*)\.([0-9\.]*)/)
+	{
+	$shlib_major=$1;
+	$shlib_minor=$2;
+	}
+
 open(IN,'<Makefile.org') || die "unable to read Makefile.org:$!\n";
 open(OUT,">$Makefile") || die "unable to create $Makefile:$!\n";
 print OUT "### Generated automatically from Makefile.org by Configure.\n\n";
@@ -695,6 +725,10 @@ while (<IN>)
 	s/^VERSION=.*/VERSION=$version/;
 	s/^MAJOR=.*/MAJOR=$major/;
 	s/^MINOR=.*/MINOR=$minor/;
+	s/^SHLIB_VERSION_NUMBER=.*/SHLIB_VERSION_NUMBER=$shlib_version_number/;
+	s/^SHLIB_VERSION_HISTORY=.*/SHLIB_VERSION_HISTORY=$shlib_version_history/;
+	s/^SHLIB_MAJOR=.*/SHLIB_MAJOR=$shlib_major/;
+	s/^SHLIB_MINOR=.*/SHLIB_MINOR=$shlib_minor/;
 	s/^INSTALLTOP=.*$/INSTALLTOP=$prefix/;
 	s/^OPENSSLDIR=.*$/OPENSSLDIR=$openssldir/;
 	s/^INSTALL_PREFIX=.*$/INSTALL_PREFIX=$install_prefix/;
@@ -716,6 +750,8 @@ while (<IN>)
 	s/^PROCESSOR=.*/PROCESSOR= $processor/;
 	s/^RANLIB=.*/RANLIB= $ranlib/;
 	s/^PERL=.*/PERL= $perl/;
+	s/^SHLIB_TARGET=.*/SHLIB_TARGET=$shared_target/;
+	s/^LIBS=.*/LIBS=libcrypto\.so\* libssl\.so\*/ if (!$no_shared);
 	print OUT $_."\n";
 	}
 close(IN);
@@ -1024,5 +1060,7 @@ sub print_table_entry
 \$rmd160_obj   = $rmd160_obj
 \$rc5_obj      = $rc5_obj
 \$dso_scheme   = $dso_scheme
+\$shared_target= $shared_target
+\$shared_cflag = $shared_cflag
 EOF
 	}