Hi, Alan,
On Jan 25, 2010, at 21:45 , Alan W. Irwin wrote:
> On 2010-01-25 15:58-0800 David MacMahon wrote:
>
>> If any curious souls out there can figure this out I'd sure
>> appreciate it. I'm happy that it works with WITH_FREETYPE=ON because
>> that's what I prefer, but I'm also perplexed as to why the build
>> behaves differently with WITH_FREETYPE=OFF.
>
> From the detailed results you gave me off list, I figured it might
> be due to
> your adopted DYLD_LIBRARY_PATH that did not refer to your non-standard
> (macports) locations for libfreetype. Let us know whether if fixing
> that makes a difference.
I'm sorry to say that it does not make a helpful difference. I think
it might be a little bit of a red herring in that I think Macs do
have their own form of embedded rpath-type info in the executables
and shared libraries. How else would this work?...
$ export DYLD_LIBRARY_PATH=fubar
$ echo $DYLD_LIBRARY_PATH
fubar
# Truncated lines to avoid email wrapping/mangling
$ otool -L /opt/local/bin/octave | cut -c1-50
/opt/local/bin/octave:
/opt/local/lib/octave-3.2.3/liboctinterp.dylib (c
/opt/local/lib/octave-3.2.3/liboctave.dylib (comp
/opt/local/lib/octave-3.2.3/libcruft.dylib (compa
/opt/local/lib/libmetis.4.dylib (compatibility ve
/opt/local/lib/liblapack.dylib (compatibility ver
/opt/local/lib/libptcblas.dylib (compatibility ve
/opt/local/lib/libptf77blas.dylib (compatibility
[snip]
Installing PLplot from the "bad" (i.e. WITH_FRETYPE=OFF) build tree,
I get a bus error if I use the xcairo driver with DYLD_LIBRARY_PATH
set as "usual" (for me) OR set to empty. If I prepend "/opt/local/
lib" to DYLD_LIBRARY_PATH, I get an "Unable to load driver" error
message; better than a bus error, but not by much...
$ DYLD_LIBRARY_PATH= ./x01c -dev xcairo
PLplot library version: 5.9.5
Bus error
$ DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH ./x01c -dev xcairo
PLplot library version: 5.9.5
Bus error
$ DYLD_LIBRARY_PATH=/opt/local/lib:$DYLD_LIBRARY_PATH ./x01c -dev xcairo
PLplot library version: 5.9.5
Unable to load driver: cairo.
*** PLPLOT ERROR, IMMEDIATE EXIT ***
Unable to load driver
Program aborted
I think if I rebuild with pldebug enabled, then I might get
informational output from line 3247 of plcore.c...
pldebug( "plLoadDriver", "lt_dlopenext failed because of "
"the following reason:\n%s\n", lt_dlerror());
Interestingly, installing PLplot from the "good" (i.e.
WITH_FREETYPE=ON) build tree, works with my DYLD_LIBRARY_PATH setting
or setting it to nothing...
$ DYLD_LIBRARY_PATH= ./x01c -dev xcairo
PLplot library version: 5.9.5
$ DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH ./x01c -dev xcairo
PLplot library version: 5.9.5
...but it fails to load if I prepend /opt/local/lib to
DYLD_LIBRARY_PATH...
$ DYLD_LIBRARY_PATH=/opt/local/lib:$DYLD_LIBRARY_PATH ./x01c -dev xcairo
dyld: Library not loaded: /System/Library/Frameworks/
Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/
A/libLAPACK.dylib
Referenced from: /System/Library/Frameworks/Accelerate.framework/
Versions/A/Frameworks/vecLib.framework/Versions/A/vecLib
Reason: Incompatible library version: vecLib requires version
1.0.0 or later, but libLAPACK.dylib provides version 0.0.0
Trace/BPT trap
I think this is because the dynamic linker, dyld, finds and deems
incompatible the liblapack.dylib in /opt/local/lib before finding
libLAPACK.dylib in /System/Library/... (Macs apparently like case-
insensitive filesystems for some reason, maybe a hangover from their
pre-UNIX days).
Weird.
I think I will stop setting DYLD_LIBRARY_PATH until I remember why I
set it in the first place! :-) But I'm still unable to explain why
WITH_FREETYPE=OFF causes problems with xcairo.
Dave
P.S. FWIW, my cmake line was simply "cmake .. 1>cmake.stdout
2>cmake.stderr". The only options are what you see in the
CMakeCache.txt files.
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