[PD-dev] Re: Universal Makefile for PD

[Adam Lindsay]

Hans-Christoph Steiner said this at Mon, 10 Feb 2003 23:49:54 -0500:

>
>On Monday, Feb 10, 2003, at 12:04 America/New_York, Adam Lindsay wrote:
>
>>>> MACOSXLDFLAGS = -bundle -bundle_loader /path/to/pd/bin/pd
>>>> -flat_namespace
>>>>
>>>> (often you will find "-undefined suppress" in the place of "-
>>>> bundle_loader", but explicitly telling the linker about Pd's symbols 
>>>> is
>>>> better.)
>>>>
>
>One other question which will hopefully benefit other budding Darwin 
>porters like me: if I use the
>-bundle_loader /path/to/pd/bin/pd flag instead of -undefined suppress, 
>will it tie that executable to pd being install in that path?  So if I 
>install that binary into a PD install that's in 
>/local/path/to/pd/bin/pd, will that binary still work?

I've been able to use externals made in that way with any Pd.

What I (think I) understand is happening is that -bundle_loader just
tells the linker to look at the Pd executable first for missing symbols,
before throwing up an error as an undefined symbol. This way it doesn't
actually *ignore* undefined symbols, which could make for difficult debugging.

adam


>Here is the man page section on this, I read it, but I want to make 
>sure I understand:
>
>        When creating bundles (MH_BUNDLE outputs) with the static link 
>editor when two-level namespace  is  in
>        effect  (now  the default) and the bundle has references to 
>symbols expected to be defined in the pro-
>        gram loading the bundle, then the -bundle_loader executable must 
>be used.
>
>...
>
>        -bundle_loader executable
>               This  specifies the executable that will be loading the 
>bundle output file being linked.  Unde-
>               fined symbols from the bundle are checked against the 
>specified executable like it was  one  of
>               the  dynamic  libraries  the  bundle  was  linked  with.  
>  If  the  bundle  being  created with
>               -twolevel_namespace in effect then the searching of the 
>executable for symbols is based on  the
>               placement  of  the  -bundle_loader  flag  relative to the 
>dynamic libraries.  If the the bundle
>               being created with -flat_namespace then the searching of 
>the  executable  is  done  before  all
>               dynamic libraries.
>
>
>.hc

-- 
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
 Adam T. Lindsay                      atl at comp.lancs.ac.uk
 Computing Dept, Lancaster University   +44(0)1524/594.537
 Lancaster, LA1 4YR, UK             Fax:+44(0)1524/593.608
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-