This has already be the subject of a thread end of August 2005:
on OSX 10.3 at least gfortran yields a lot of (harmless) warnings:
...
symbol _cacoshf used from dynamic library /usr/lib/libSystem.dylib(complex.o)
not from earlier dynamic library /usr/lib/libmx.A.dylib(single module)
...
or
...
/usr/lib/libmx.dylib(single module) definition of _cacoshf
/usr/lib/libSystem.dylib(complex.o) definition of _cacoshf
...
They are removed with the options:
-bind_at_load -multiply_defined suppress
The culprit is the file '/gcc/config/rs6000/darwin7.h':
#define LIB_SPEC "%{!static:\
%:version-compare(!< 10.3 mmacosx-version-min= -lmx)\
-lSystem}"
which puts -lmx and -lSystem in the wrong order.
To avoid this problem I am used to change it to:
#define LIB_SPEC "%{!static:-lSystem -lmx}"
which works with gfortran and probably with gcc (not enough tests
from my side).
I have has some mails exchange on a gcc list about it, but
not only I did not convince them to do the change, but I did
not even get an answer about the reason of this change on 10.3.
May be Jeffrey Whitaker will be more successfull, meanwhile
I think it will be nice to patch the darwin7.h file to avoid
both the warnings and the options.
TIA
Dominique
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