r11377: Add support for building LIBRARY elements as shared libraries:

 - Adds -rpath bin/ so you don't have to install Samba in order to use compiled binaries.
 - Writes out pkg-config files when building shared libs
 - Supports automatic fallback to MERGEDOBJ (which is the default) or
   OBJ_LIST (if ld -r is not supported)

Building with shared libs reduces the size of the Samba binaries from
197 Mb to 60 Mb (including libraries) on my system (GCC4, with debugging).

To build with shared libraries support enabled, run:

LIBRARY_OUTPUT_TYPE=SHARED_LIBRARY ./config.status

init functions don't get called correctly yet when using shared libs, so
you won't be able to actually run anything with success :-)

Once init functions are done, I'll look at support for loading shared
modules once again.

Based on a patch by Peter Novodvorsky (nidd on IRC).
(This used to be commit 0b54405685674a2b19a28d77aae5b1136b5a4728)

6 files changed, 76 insertions, 36 deletions

diff --git a/source4/build/smb_build/config_mk.pm b/source4/build/smb_build/config_mk.pm
index 2adc2196054..d7408a5f8fa 100644
--- a/source4/build/smb_build/config_mk.pm
+++ b/source4/build/smb_build/config_mk.pm
@@ -26,7 +26,6 @@ my $section_types = {
 		"OBJ_FILES"		=> "list",
 
 		"REQUIRED_SUBSYSTEMS"	=> "list",
-		"TARGET_DEPS"		=> "list",
 
 		"ENABLE"		=> "bool",
 		"NOPROTO"		=> "bool",
@@ -42,7 +41,6 @@ my $section_types = {
 		"OBJ_FILES"		=> "list",
 
 		"REQUIRED_SUBSYSTEMS"	=> "list",
-		"TARGET_DEPS"		=> "list",
 
 		"ENABLE"		=> "bool",
 		"NOPROTO"		=> "bool",
@@ -53,7 +51,6 @@ my $section_types = {
 		"OBJ_FILES"		=> "list",
 
 		"REQUIRED_SUBSYSTEMS"	=> "list",
-		"TARGET_DEPS"		=> "list",
 
 		"ENABLE"		=> "bool",
 		"NOPROTO"		=> "bool",
@@ -65,12 +62,15 @@ my $section_types = {
 		"MAJOR_VERSION"		=> "string",
 		"MINOR_VERSION"		=> "string",
 		"RELEASE_VERSION"	=> "string",
+
+		"INIT_FUNCTION"		=> "string",
 		"INIT_OBJ_FILES"	=> "list",
 		"ADD_OBJ_FILES"		=> "list",
 		"OBJ_FILES"		=> "list",
 
+		"DESCRIPTION" => "string",
+
 		"REQUIRED_SUBSYSTEMS"	=> "list",
-		"TARGET_DEPS"		=> "list",
 
 		"ENABLE"		=> "bool",
 		"NOPROTO"		=> "bool",
diff --git a/source4/build/smb_build/env.pm b/source4/build/smb_build/env.pm
index b3dcbb8456f..8acd7dd9322 100644
--- a/source4/build/smb_build/env.pm
+++ b/source4/build/smb_build/env.pm
@@ -50,9 +50,9 @@ sub _set_config($$)
 	}
 }
 
-sub PkgConfig($$$$$$)
+sub PkgConfig($$$$$$$)
 {
-	my ($self,$path,$name,$libs,$cflags,$version) = @_;
+	my ($self,$path,$name,$libs,$cflags,$version,$desc) = @_;
 
 	print __FILE__.": creating $path\n";
 
@@ -67,9 +67,12 @@ includedir=$self->{config}->{includedir}
 __EOF__
 
 	print OUT "Name: $name\n";
+	if (defined($desc)) {
+		print OUT "Description: $desc\n";
+	}
 	print OUT "Version: $version\n";
-	print OUT "Libs: $libs\n";
-	print OUT "Cflags: $cflags\n";
+	print OUT "Libs: -L\${libdir} $libs\n";
+	print OUT "Cflags: -I\${includedir} $cflags\n";
 
 	close(OUT);
 }
diff --git a/source4/build/smb_build/input.pm b/source4/build/smb_build/input.pm
index e685f411571..88d7c24af82 100644
--- a/source4/build/smb_build/input.pm
+++ b/source4/build/smb_build/input.pm
@@ -39,7 +39,7 @@ sub check_subsystem($$)
 {
 	my ($INPUT, $subsys) = @_;
 	if ($subsys->{ENABLE} ne "YES") {
-		printf("Subsystem: %s disabled!\n",$subsys->{NAME});
+		printf("Subsystem `%s' disabled\n",$subsys->{NAME});
 		return;
 	}
 	
@@ -54,7 +54,6 @@ sub check_module($$)
 
 	die("Module $mod->{NAME} does not have a SUBSYSTEM set") if not defined($mod->{SUBSYSTEM});
 
-
 	($mod->{DEFAULT_BUILD} = "STATIC") if not defined($mod->{DEFAULT_BUILD});
 	
 	my $use_default = 0;
@@ -62,7 +61,6 @@ sub check_module($$)
 	if (!(defined($INPUT->{$mod->{SUBSYSTEM}}))) {
 		$mod->{BUILD} = "NOT";
 		$mod->{ENABLE} = "NO";
-		printf("Module: %s...PARENT SUBSYSTEM ($mod->{SUBSYSTEM}) DISABLED\n",$mod->{NAME});
 		return;
 	}
 
@@ -85,15 +83,13 @@ sub check_module($$)
 		$mod->{OUTPUT_TYPE} = "SHARED_LIBRARY";
 		$mod->{INSTALLDIR} = "LIBDIR/$mod->{SUBSYSTEM}";
 		push (@{$mod->{REQUIRED_SUBSYSTEMS}}, $mod->{SUBSYSTEM});
-		printf("Module: %s...shared\n",$mod->{NAME});
 	} elsif ($mod->{CHOSEN_BUILD} eq "STATIC") {
 		$mod->{ENABLE} = "YES";
 		push (@{$INPUT->{$mod->{SUBSYSTEM}}{REQUIRED_SUBSYSTEMS}}, $mod->{NAME});
-		printf("Module: %s...static\n",$mod->{NAME});
 		$mod->{OUTPUT_TYPE} = $subsystem_output_type;
 	} else {
 		$mod->{ENABLE} = "NO";
-		printf("Module: %s...not\n",$mod->{NAME});
+		printf("Module `%s' disabled\n",$mod->{NAME});
 		return;
 	}
 }
@@ -103,12 +99,18 @@ sub check_library($$)
 	my ($INPUT, $lib) = @_;
 
 	if ($lib->{ENABLE} ne "YES") {
-		printf("Library: %s...disabled\n",$lib->{NAME});
+		printf("Library `%s' disabled\n",$lib->{NAME});
 		return;
 	}
 
+
 	$lib->{OUTPUT_TYPE} = $library_output_type;
 
+	unless (defined($lib->{MAJOR_VERSION})) {
+		print "$lib->{NAME}: Please specify MAJOR_VERSION\n";
+		return;
+	}
+
 	$lib->{INSTALLDIR} = "LIBDIR";
 }
 
@@ -117,7 +119,7 @@ sub check_binary($$)
 	my ($INPUT, $bin) = @_;
 
 	if ($bin->{ENABLE} ne "YES") {
-		printf("Binary: %s...disabled\n",$bin->{NAME});
+		printf("Binary `%s' disabled\n",$bin->{NAME});
 		return;
 	}
 
@@ -133,8 +135,11 @@ sub calc_unique_deps($$)
 
 	foreach my $dep (@{$deps}) {
 		if (not defined($udeps->{$$dep->{NAME}})) {
-			$udeps->{$$dep->{NAME}} = "BUSY";
-			calc_unique_deps($$dep->{DEPENDENCIES}, $udeps);
+      		   if (defined ($$dep->{OUTPUT_TYPE}) && (($$dep->{OUTPUT_TYPE} eq "OBJ_LIST")
+			    or ($$dep->{OUTPUT_TYPE} eq "MERGEDOBJ"))) {
+   			        $udeps->{$$dep->{NAME}} = "BUSY";
+			        calc_unique_deps($$dep->{DEPENDENCIES}, $udeps);
+		        }
 			$udeps->{$$dep->{NAME}} = $$dep;
 		}
 	}
diff --git a/source4/build/smb_build/main.pl b/source4/build/smb_build/main.pl
index 85e48e6ed90..a207062d34b 100644
--- a/source4/build/smb_build/main.pl
+++ b/source4/build/smb_build/main.pl
@@ -30,7 +30,8 @@ if (defined($ENV{"SUBSYSTEM_OUTPUT_TYPE"})) {
 if (defined($ENV{"LIBRARY_OUTPUT_TYPE"})) {
 	$smb_build::input::library_output_type = $ENV{LIBRARY_OUTPUT_TYPE};
 } elsif ($config::config{BLDSHARED} eq "true") {
-	# FIXME: This should really be SHARED_LIBRARY
+	#FIXME: This should eventually become SHARED_LIBRARY 
+	# rather then MERGEDOBJ once I'm certain it works ok -- jelmer
 	$smb_build::input::library_output_type = "MERGEDOBJ";
 } elsif ($config::config{BLDMERGED} eq "true") {
 	$smb_build::input::library_output_type = "MERGEDOBJ";
diff --git a/source4/build/smb_build/makefile.pm b/source4/build/smb_build/makefile.pm
index be49a612c9c..a84d336716e 100644
--- a/source4/build/smb_build/makefile.pm
+++ b/source4/build/smb_build/makefile.pm
@@ -91,6 +91,11 @@ sub _prepare_compiler_linker($)
 {
 	my ($self) = @_;
 
+	my $devld = "";
+	if ($self->{developer}) {
+		$devld = " \$(DEVEL_LDFLAGS)";
+	}
+
 	$self->output(<< "__EOD__"
 SHELL=$self->{config}->{SHELL}
 
@@ -104,14 +109,15 @@ HOSTCC=$self->{config}->{HOSTCC}
 CPP=$self->{config}->{CPP}
 CPPFLAGS=$self->{config}->{CPPFLAGS}
 
-LD=$self->{config}->{LD}
-LD_FLAGS=$self->{config}->{LDFLAGS} 
+DEVEL_LDFLAGS=-Wl,-rpath,bin/
+LD=$self->{config}->{LD} 
+LDFLAGS=$self->{config}->{LDFLAGS} -Lbin/$devld
 
 STLD=$self->{config}->{AR}
-STLD_FLAGS=-rc
+STLD_FLAGS=-rc -Lbin/
 
 SHLD=$self->{config}->{CC}
-SHLD_FLAGS=$self->{config}->{LDSHFLAGS}
+SHLD_FLAGS=$self->{config}->{LDSHFLAGS} -Lbin/$devld
 SONAMEFLAG=$self->{config}->{SONAMEFLAG}
 SHLIBEXT=$self->{config}->{SHLIBEXT}
 
@@ -236,7 +242,7 @@ sub SharedLibrary($$)
 {
 	my ($self,$ctx) = @_;
 
-	push (@{$self->{shared_libs}}, $ctx->{OUTPUT});
+	push (@{$self->{shared_libs}}, "bin/$ctx->{LIBRARY_NAME}");
 
 	$self->_prepare_obj_list($ctx->{TYPE}, $ctx);
 	$self->_prepare_cflags($ctx->{TYPE}, $ctx);
@@ -374,7 +380,7 @@ BINARY_$ctx->{NAME}_LINK_FLAGS =$tmpflag
 #
 bin/$ctx->{BINARY}: bin/.dummy \$(BINARY_$ctx->{NAME}_DEPEND_LIST) \$(BINARY_$ctx->{NAME}_OBJS)
 	\@echo Linking \$\@
-	\@\$(CC) \$(LD_FLAGS) -o \$\@ \\
+	\@\$(CC) \$(LDFLAGS) -o \$\@ \\
 		\$\(BINARY_$ctx->{NAME}_LINK_FLAGS) \\
 		\$\(BINARY_$ctx->{NAME}_LINK_LIST) \\
 		\$\(BINARY_$ctx->{NAME}_LINK_FLAGS)
@@ -399,11 +405,23 @@ sub PkgConfig($$)
 {
 	my ($self,$ctx) = @_;
 	
-	my $path = "$ctx->{BASEDIR}/$ctx->{NAME}.pc";
+	my $link_name = $ctx->{NAME};
+
+	$link_name =~ s/^LIB//g;
+	$link_name = lc($link_name);
+
+	my $path = "$ctx->{BASEDIR}/$link_name.pc";
 
 	push (@{$self->{pc_files}}, $path);
 
-	smb_build::env::PkgConfig($self,$path,$ctx->{NAME},"FIXME",join(' ', @{$ctx->{CFLAGS}}), "$ctx->{MAJOR_VERSION}.$ctx->{MINOR_VERSION}.$ctx->{RELEASE_VERSION}"); 
+	smb_build::env::PkgConfig($self,
+		$path,
+		$link_name,
+		$ctx->{OUTPUT},
+		join(' ', @{$ctx->{CFLAGS}}), 
+		"$ctx->{MAJOR_VERSION}.$ctx->{MINOR_VERSION}.$ctx->{RELEASE_VERSION}",
+		$ctx->{DESCRIPTION}
+	); 
 }
 
 sub ProtoHeader($$)
diff --git a/source4/build/smb_build/output.pm b/source4/build/smb_build/output.pm
index b1edf02c943..2dc74562f6a 100644
--- a/source4/build/smb_build/output.pm
+++ b/source4/build/smb_build/output.pm
@@ -44,32 +44,42 @@ sub generate_objlist($)
 sub generate_shared_library($)
 {
 	my $lib = shift;
+	my $link_name;
 
 	@{$lib->{DEPEND_LIST}} = ();
 	@{$lib->{LINK_LIST}} = ("\$($lib->{TYPE}_$lib->{NAME}\_OBJS)");
-	$lib->{LIBRARY_NAME} = lc($lib->{NAME}).".so";
-	$lib->{TARGET} = "bin/lib$lib->{LIBRARY_NAME}";
+
+	$link_name = $lib->{NAME};
+	$link_name =~ s/^LIB//;
+	$link_name = lc($link_name);
+
+	$lib->{LIBRARY_NAME} = "lib$link_name.\$(SHLIBEXT)";
+	$lib->{TARGET} = "bin/$lib->{LIBRARY_NAME}";
 	if (defined($lib->{MAJOR_VERSION})) {
 		$lib->{LIBRARY_SONAME} = $lib->{LIBRARY_NAME}.".$lib->{MAJOR_VERSION}";
 		$lib->{LIBRARY_REALNAME} = $lib->{LIBRARY_SONAME}.".$lib->{MINOR_VERSION}.$lib->{RELEASE_VERSION}";
-		$lib->{TARGET} = "bin/lib$lib->{LIBRARY_REALNAME}";
+		$lib->{TARGET} = "bin/$lib->{LIBRARY_REALNAME}";
 		@{$lib->{LINK_FLAGS}} = ("\$(SONAMEFLAG)$lib->{LIBRARY_SONAME}");
 	}
-	$lib->{OUTPUT} = "-l".lc($lib->{NAME});
+	$lib->{OUTPUT} = "-l$link_name";
 }
 
 sub generate_static_library($)
 {
 	my $lib = shift;
+	my $link_name;
 
 	@{$lib->{DEPEND_LIST}} = ();
 
-	$lib->{LIBRARY_NAME} = lc($lib->{NAME}).".a";
+	$link_name = $lib->{NAME};
+	$link_name =~ s/^LIB//;
+
+	$lib->{LIBRARY_NAME} = "lib".lc($link_name).".a";
 	@{$lib->{LINK_LIST}} = ("\$($lib->{TYPE}_$lib->{NAME}\_OBJS)");
 	@{$lib->{LINK_FLAGS}} = ();
 
-	$lib->{TARGET} = "bin/lib$lib->{LIBRARY_NAME}";
-	$lib->{OUTPUT} = "-l".lc($lib->{NAME});
+	$lib->{TARGET} = "bin/$lib->{LIBRARY_NAME}";
+	$lib->{OUTPUT} = "-l".lc($link_name);
 }
 
 sub generate_binary($)
@@ -145,8 +155,11 @@ sub create_output($)
 			push(@{$part->{LINK_LIST}}, $elem->{OUTPUT}) if defined($elem->{OUTPUT});
 			push(@{$part->{LINK_FLAGS}}, @{$elem->{LIBS}}) if defined($elem->{LIBS});
 			push(@{$part->{LINK_FLAGS}},@{$elem->{LDFLAGS}}) if defined($elem->{LDFLAGS});
-			push(@{$part->{DEPEND_LIST}}, $elem->{TARGET}) if defined($elem->{TARGET});
-
+			if (defined($elem->{OUTPUT_TYPE}) and ($elem->{OUTPUT_TYPE} eq "SHARED_LIBRARY")) {
+			    push(@{$part->{DEPEND_LIST}}, "bin/$elem->{LIBRARY_NAME}");			    
+			} else { 
+			    push(@{$part->{DEPEND_LIST}}, $elem->{TARGET}) if defined($elem->{TARGET});
+			}
 			push(@{$part->{SUBSYSTEM_INIT_FUNCTIONS}}, $elem->{INIT_FUNCTION}) if 
 				$part->{OUTPUT_TYPE} eq "BINARY" and 
 				defined($elem->{INIT_FUNCTION}) and