Re: [OMPI devel] vt-integration

[Brian W. Barrett]

OS X enforces a no duplicate symbol rule when flat namespaces are in use 
(the default on OS X).  If all the libraries are two-level namespace 
libraries (libSystem.dylib, aka libm.dylib is two-level), then duplicate 
symbols are mostly ok.

Libtool by default forces a flat namespace in sharedlibraries to work 
around an oddity on early OS X systems with undefined references.  There's 
also a way to make static two-level namespaces (I think), but I haven't 
tried that before).  You can cause Libtool (and the linker) to be a bit 
more sane if you set the environment variable MACOSX_DEPLOYMENT_TARGET to 
either 10.3 or 10.4.  The shared library rules followed by Libtool and the 
compiler chain will then be for that OS X release, rather than for the 
original 10.0.  We don't support anything older than 10.3, so this isn't 
really a problem.

Of course, since the default for users is to emit 10.0 target code, that 
can be a bit hard to make work out.  So you might want to have a configure 
test to figure all that out and not build the IO intercept library in some 
cases.

Brian

On Wed, 5 Dec 2007, Jeff Squyres wrote:

I know that OS X's linker is quite different than the Linux linker --
you might want to dig into the ld(1) man page on OS X as a starting
point, and/or consult developer.apple.com for more details.


On Dec 5, 2007, at 10:04 AM, Matthias Jurenz wrote:

Hi Jeff,

I have added checks for the functions open64, creat64, etc. to the
VT's configure script,
so building of VT works fine on MacOS AND Solaris (Terry had the
same problem).
Thanks for your hint ;-)

Unfortunately, there is a new problem on MacOS. I get the following
linker errors, if I try
to link an application with the VT libraries:

gcc -finstrument-functions pi_seq.o -lm -o pi_seq
-L/Users/jurenz/lib/vtrace-5.4.1/lib  -lvt  -lotf -lz -L/usr/local/
lib/ -lbfd -lintl -L/usr/local/lib/ -liberty
/usr/bin/ld: multiple definitions of symbol _close
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(close.So)
definition of _close
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _close in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _fclose
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(fclose.So)
definition of _fclose
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _fclose in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _fdopen
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(fdopen.So)
definition of _fdopen
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _fdopen in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _fgets
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(fgets.So)
definition of _fgets
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _fgets in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _fopen
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(fopen.So)
definition of _fopen
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _fopen in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _fprintf
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../
libm.dylib(fprintf.So) definition of _fprintf
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _fprintf in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _fputc
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(fputc.So)
definition of _fputc
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _fputc in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _fread
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(fread.So)
definition of _fread
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _fread in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _fwrite
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(fwrite.So)
definition of _fwrite
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _fwrite in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _open
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(open.So)
definition of _open
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _open in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _read
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(read.So)
definition of _read
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _read in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _rewind
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(rewind.So)
definition of _rewind
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _rewind in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _write
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(write.So)
definition of _write
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _write in section (__TEXT,__text)
/usr/bin/ld: multiple definitions of symbol _writev
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(writev.So)
definition of _writev
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _writev in section (__TEXT,__text)
/usr/bin/ld: warning multiple definitions of symbol _lseek
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _lseek in section (__TEXT,__text)
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(lseek.So)
definition of _lseek
/usr/bin/ld: warning multiple definitions of symbol _fseek
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _fseek in section (__TEXT,__text)
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(fseek.So)
definition of _fseek
/usr/bin/ld: warning multiple definitions of symbol _fseeko
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _fseeko in section (__TEXT,__text)
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(fseek.So)
definition of _fseeko
/usr/bin/ld: warning multiple definitions of symbol _fscanf
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _fscanf in section (__TEXT,__text)
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(fscanf.So)
definition of _fscanf
/usr/bin/ld: warning multiple definitions of symbol _putc
/Users/jurenz/lib/vtrace-5.4.1/lib/libvt.a(vt_iowrap.o) definition
of _putc in section (__TEXT,__text)
/usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libm.dylib(putc.So)
definition of _putc
collect2: ld returned 1 exit status
make: *** [pi_seq] Error 1

To intercept I/O calls, VT overwrites the Libc's I/O functions in
the source file vtlib/vt_iowrap.c.
It seems that the GNU compiler on MacOS doen't like that ?? Has
anyone an idea what's wrong ?
I have used the GNU compiler version 4.0.1 on MacOS 9 (darwin 8.11.1).
To avoid this problem, I/O tracing will be disabled on MacOS... but
that's not a nice solution :-(


Regards,
Matthias

Unfortunately, VT fails to compile on OS X Leopard (10.5.1).

- Is there a way to remove the anonymous variadic macros?
- open64, creat64, etc. do not appear to exist on OS X.

I don't know if you want to go through the work of supporting OS X
or
not -- if not, we should put in appropriate controls so that VT will
"turn itself off" when it detects that it is on a system that does
not
support what it needs (e.g., open64, creat64, ...etc.).

Here's the output from a build on OS X 10.5.1:

Making all in vtlib
gcc -DHAVE_CONFIG_H -I. -I.. -I../tools/opari/lib -I../extlib/otf/
otflib -I../extlib/otf/otflib      -DBINDIR=\"/Users/jsquyres/
bogus/bin
\" -DDATADIR=\"/Users/jsquyres/bogus/share/vampirtrace\" -DRFG   -
DVT_IOWRAP  -g -Wall -Wundef -Wno-long-long -Wsign-compare -
Wmissing-
prototypes -Wstrict-prototypes -Wcomment -pedantic -Wno-long-
double -
Werror-implicit-function-declaration -finline-functions -fno-strict-
aliasing  -MT vt_iowrap.o -MD -MP -MF .deps/vt_iowrap.Tpo -c -o
vt_iowrap.o vt_iowrap.c
In file included from vt_iowrap.c:32:
vt_iowrap.h:239:20: warning: anonymous variadic macros were
introduced
in C99
vt_iowrap.h:282:43: warning: anonymous variadic macros were
introduced
in C99
vt_iowrap.h:328:33: warning: anonymous variadic macros were
introduced
in C99
vt_iowrap.h:335:38: warning: anonymous variadic macros were
introduced
in C99
vt_iowrap.c: In function ‘open’:
vt_iowrap.c:170: warning: ‘mode_t’ is promoted to ‘int’ when passed
through ‘...’
vt_iowrap.c:170: warning: (so you should pass ‘int’ not ‘mode_t’ to
‘va_arg’)
vt_iowrap.c:170: note: if this code is reached, the program will
abort
vt_iowrap.c: At top level:
vt_iowrap.c:193: warning: no previous prototype for ‘open64’
vt_iowrap.c: In function ‘open64’:
vt_iowrap.c:204: warning: ‘mode_t’ is promoted to ‘int’ when passed
through ‘...’
vt_iowrap.c:204: note: if this code is reached, the program will
abort
vt_iowrap.c: At top level:
vt_iowrap.c:249: warning: no previous prototype for ‘creat64’
vt_iowrap.c:368: error: syntax error before ‘lseek64’
vt_iowrap.c:368: error: syntax error before ‘off64_t’
vt_iowrap.c:369: warning: return type defaults to ‘int’
vt_iowrap.c:369: warning: function declaration isn’t a prototype
vt_iowrap.c: In function ‘lseek64’:
vt_iowrap.c:371: error: ‘off64_t’ undeclared (first use in this
function)
vt_iowrap.c:371: error: (Each undeclared identifier is reported only
once
vt_iowrap.c:371: error: for each function it appears in.)
vt_iowrap.c:371: error: syntax error before ‘ret’
vt_iowrap.c:376: error: implicit declaration of function ‘off64_t’
vt_iowrap.c:376: error: syntax error before ‘)’ token
vt_iowrap.c:383: error: ‘ret’ undeclared (first use in this
function)
vt_iowrap.c:383: error: syntax error before ‘)’ token
vt_iowrap.c:385: error: ‘fd’ undeclared (first use in this function)
vt_iowrap.c:389: warning: control reaches end of non-void function
vt_iowrap.c: At top level:
vt_iowrap.c:542: error: syntax error before ‘off64_t’
vt_iowrap.c:543: warning: function declaration isn’t a prototype
vt_iowrap.c: In function ‘pread64’:
vt_iowrap.c:550: error: syntax error before ‘off64_t’
vt_iowrap.c:550: warning: function declaration isn’t a prototype
vt_iowrap.c:550: error: ‘fd’ undeclared (first use in this function)
vt_iowrap.c:550: error: ‘buf’ undeclared (first use in this
function)
vt_iowrap.c:550: error: ‘count’ undeclared (first use in this
function)
vt_iowrap.c:550: error: ‘offset’ undeclared (first use in this
function)
vt_iowrap.c:557: error: syntax error before ‘off64_t’
vt_iowrap.c:557: warning: function declaration isn’t a prototype
vt_iowrap.c: At top level:
vt_iowrap.c:567: error: syntax error before ‘off64_t’
vt_iowrap.c:568: warning: function declaration isn’t a prototype
vt_iowrap.c: In function ‘pwrite64’:
vt_iowrap.c:575: error: syntax error before ‘off64_t’
vt_iowrap.c:575: warning: function declaration isn’t a prototype
vt_iowrap.c:575: error: ‘fd’ undeclared (first use in this function)
vt_iowrap.c:575: error: ‘buf’ undeclared (first use in this
function)
vt_iowrap.c:575: error: ‘count’ undeclared (first use in this
function)
vt_iowrap.c:575: error: ‘offset’ undeclared (first use in this
function)
vt_iowrap.c:582: error: syntax error before ‘off64_t’
vt_iowrap.c:582: warning: function declaration isn’t a prototype
vt_iowrap.c: At top level:
vt_iowrap.c:617: warning: no previous prototype for ‘fopen64’
vt_iowrap.c:743: error: syntax error before ‘off64_t’
vt_iowrap.c:744: warning: function declaration isn’t a prototype
vt_iowrap.c: In function ‘fseeko64’:
vt_iowrap.c:751: error: syntax error before ‘off64_t’
vt_iowrap.c:751: warning: function declaration isn’t a prototype
vt_iowrap.c:751: error: ‘stream’ undeclared (first use in this
function)
vt_iowrap.c:751: error: ‘offset’ undeclared (first use in this
function)
vt_iowrap.c:751: error: ‘whence’ undeclared (first use in this
function)
vt_iowrap.c:760: error: syntax error before ‘off64_t’
vt_iowrap.c:760: warning: function declaration isn’t a prototype
vt_iowrap.c: At top level:
vt_iowrap.c:815: warning: type defaults to ‘int’ in declaration of
‘fpos64_t’
vt_iowrap.c:815: error: syntax error before ‘*’ token
vt_iowrap.c:815: warning: function declaration isn’t a prototype
vt_iowrap.c: In function ‘fsetpos64’:
vt_iowrap.c:822: warning: type defaults to ‘int’ in declaration of
‘fpos64_t’
vt_iowrap.c:822: error: syntax error before ‘*’ token
vt_iowrap.c:822: warning: function declaration isn’t a prototype
vt_iowrap.c:822: error: ‘stream’ undeclared (first use in this
function)
vt_iowrap.c:822: error: ‘pos’ undeclared (first use in this
function)
vt_iowrap.c:831: warning: type defaults to ‘int’ in declaration of
‘fpos64_t’
vt_iowrap.c:831: error: syntax error before ‘*’ token
vt_iowrap.c:831: warning: function declaration isn’t a prototype
make[5]: *** [vt_iowrap.o] Error 1
make[4]: *** [all-recursive] Error 1
make[3]: *** [all] Error 2
make[2]: *** [all-recursive] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all-recursive] Error 1
[22:44] beezle:~/svn/vt-integration %


--
Jeff Squyres
Cisco Systems


_______________________________________________
devel mailing list
de...@open-mpi.org
http://www.open-mpi.org/mailman/listinfo.cgi/devel