building SPRNG with macports gcc45 & mpich2

[Gideon Simpson]

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
> 
>