Even sorting out the flags, I'm still getting the error:
Undefined symbols for architecture x86_64:
"_main", referenced from:
start in crt1.10.5.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
-gideon
On Dec 23, 2011, at 4:57 AM, Ryan Schmidt wrote:
>
> On Dec 22, 2011, at 22:45, Gideon Simpson wrote:
>
>> Slightly off topic, but I was wondering if anyone had successfully built
>> SPRNG (http://sprng.cs.fsu.edu/) with a macports based gcc and mpich2.
>>
>> I have gcc45 and mpich+gcc45 installed, and I receive the error:
>>
>> Undefined symbols for architecture x86_64:
>> "_main", referenced from:
>> start in crt1.10.5.o
>> ld: symbol(s) not found for architecture x86_64
>> collect2: ld returned 1 exit status
>> if g++ -DHAVE_CONFIG_H -I../SRC -I../include -DAdd_ -DSPRNG_MPI -g -O2
>> -Wno-deprecated -DLONG64=long -MT libsprng_a-sprng.o -MD -MP -MF
>> ".deps/libsprng_a-sprng.Tpo" -c -o libsprng_a-sprng.o `test -f 'sprng.cpp'
>> || echo './'`sprng.cpp; \
>> then mv -f ".deps/libsprng_a-sprng.Tpo" ".deps/libsprng_a-sprng.Po";
>> else rm -f ".deps/libsprng_a-sprng.Tpo"; exit 1; fi
>> In file included from sprng.cpp:6:0:
>> communicate.cpp:2:17: fatal error: mpi.h: No such file or directory
>
> Where is the mpi.h header? (I can't seem to build mpich myself.) You probably
> need to add that directory to CPPFLAGS with an -I argument. For example if it
> is in /opt/local/include, you need...
>
> export CPPFLAGS=-I/opt/local/include
>
> ...before you begin. Similarly, you probably need to say where the libraries
> are, e.g. with:
>
> export LDFLAGS=-L/opt/local/lib
>
>
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