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Re: OSX 32-bit build on 10.5.x (Leopard) no longer supported?
From: Michael Tuexen <Michael.Tuexen () lurchi franken de>
Date: Tue, 25 Jun 2013 18:05:15 +0200


On Jun 25, 2013, at 3:14 AM, Guy Harris <guy () alum mit edu> wrote:


On Jun 24, 2013, at 2:48 PM, David Ameiss <netshark () ameissnet com> wrote:

On my Leopard 10.5.8 system (yes, it's ancient - but needed to build 32-bit plugins) the last version of Wireshark 
that works is 1.8.6. When I try 1.8.7, 1.8.8, or 1.10.0, I get the error

dyld: unknown required load command 0x80000022

That's LC_DYLD_INFO_ONLY, which is LD_DYLD_INFO plus the LC_REQ_DYLD flag.  LC_DYLD_INFO was introduced to OS X in 
10.6:

      https://developer.apple.com/library/mac/#releasenotes/DeveloperTools/RN-dyld/

and a quick check of the binaries indicates that it's in all the executables in the Leopard install.

The configure script reports, in the build logs, that the 10.5 buildbot is powerpc-apple-darwin9.8.0, so it thinks 
it's running 10.5.8 (Darwin n.m.x corresponds to OS X 10.{n-4}.m), but somehow the linker is producing binaries using 
10.6-and-later Mach-O load commands.

The page above says

      When building a product targeted at OS X v10.6, the linker, ld, creates Macho-O images that contain only the 
new LINKEDIT format; these programs do not run on OS X v10.5 and earlier. When targeting OS X v10.5, the linker 
creates images that contain both the new and traditional LINKEDIT segment format; this practice allows programs to 
run on OS X v10.5 and run very efficiently on OS X v10.6. (When targeting OS X v10.4 or earlier, the linker produces 
only the traditional format.)

Dumpcap is being linked with the command

      /bin/sh ./libtool --tag=CC   --mode=link ccache gcc  -no-cpp-precomp -g -O2 -Wall -W -Wextra 
-Wdeclaration-after-statement -Wendif-labels -Wpointer-arith -Wno-pointer-sign -Wcast-align -Wformat-security 
-Wold-style-definition -I/usr/local/include/gtk-2.0 -I/usr/local/lib/gtk-2.0/include -I/usr/local/include/atk-1.0 
-I/usr/local/include/cairo -I/usr/local/include/pango-1.0 -I/usr/local/include/glib-2.0 
-I/usr/local/lib/glib-2.0/include -I/usr/local/include/pixman-1 -I/usr/X11/include/freetype2 -I/usr/X11/include 
-I/usr/X11/include/libpng12    -Wl,-search_paths_first  -L/usr/local/lib -L/usr/local/lib -L/usr/local/lib 
-L/usr/local/lib -o dumpcap dumpcap-capture-pcap-util-unix.o dumpcap-capture_opts.o dumpcap-capture-pcap-util.o 
dumpcap-capture_stop_conditions.o dumpcap-clopts_common.o dumpcap-conditions.o dumpcap-dumpcap.o dumpcap-pcapio.o 
dumpcap-ringbuffer.o dumpcap-sync_pipe_write.o dumpcap-tempfile.o dumpcap-version_info.o wsutil/libwsutil.la 
-L/usr/local/lib -lgthread-2.0 -lgmo
 du
le-2.0 -lglib-2.0 -lintl -liconv -lpcap -framework CoreServices  -lz

There's no -macosx_version_min flag there, so I'd *expect* it to target 10.5 by default, given that it's *running* on 
10.5.  Maybe "[creating] images that contain both the new and traditional LINKEDIT segment format", at least with 
that version of the linker, is not being done correctly; I'd assume that it puts in a load command for the 
"traditional LINKEDIT segment format" and a LD_DYLD_INFO, *without* LC_REQ_DYLD, so that the 10.5 dynamic linker 
silently ignores LD_DYLD_INFO and the 10.6 and later dynamic linkers use it.

However, the LC_REQ_DYLD flag is set (that's the 0x80000000 part), which means the dynamic linker rejects the command 
rather than silently ignoring it.  That would be appropriate if building on 10.5 and targeting 10.6; I wouldn't 
*expect* that to be the default, but maybe software on the 10.5 buildbot was updated in a way that made targeting 
10.6 the default.

Michael?
When I build the latest wireshark sources on the 10.5 PPC buildbot, I can run it on the
buildbot. I'm not aware of any special configuration on the buidlbot.
We don't support PPC for 1.10 or the current development builds.
Regarding the latest 1.8.8 builds: I downloaded the latest build
http://wiresharkdownloads.riverbed.com/wireshark/osx/Wireshark%201.8.8%20PPC%2032.dmg
and it runs on the PPC buildbot. Could it be that David downloaded an Intel version?

Best regards
Michael
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