error with gmp-ecm library

bhelmes · 2020-04-30, 16:29

A peaceful and pleasant day for you,

i have installed gmp-6.2.0 and ecm-7.0.4 and i want to use the ecm-library for an own program with :

g++ -O3 -std=c++0x -pthread -lecm -mcmodel=medium -pedantic ./2x^2-1_220.cpp /usr/local/lib/libgmp.a /usr/local/lib/libecm.a

I get the error:
/usr/local/lib/libecm.a(libecm_la-spv.o): In Funktion `spv_random':
/home/Bernhard/ecm-7.0.4/spv.c:446: Nicht definierter Verweis auf `__gmpn_random

I think it is a linker problem from g++.

Any ideas how to fix it ?

Greetings from Germany
Bernhard

xilman · 2020-04-30, 18:37

Quote:

Originally Posted by bhelmes

Any ideas how to fix it ?

How about subscribing to, and then asking on, the ECM-GMP developers list (ecm-discuss@lists.gforge.inria.fr)?
Works for me but YMMV.

bhelmes · 2020-04-30, 20:21

g++ -O3 -std=c++0x -pthread -mcmodel=medium -pedantic ./2x^2-1_220.cpp -l gmp /usr/local/lib/libgmp.a -lecm /usr/local/lib/libecm.a

will do it.

2020-04-30, 16:29	#1
bhelmes Mar 2016 419 Posts	error with gmp-ecm library A peaceful and pleasant day for you, i have installed gmp-6.2.0 and ecm-7.0.4 and i want to use the ecm-library for an own program with : g++ -O3 -std=c++0x -pthread -lecm -mcmodel=medium -pedantic ./2x^2-1_220.cpp /usr/local/lib/libgmp.a /usr/local/lib/libecm.a I get the error: /usr/local/lib/libecm.a(libecm_la-spv.o): In Funktion `spv_random': /home/Bernhard/ecm-7.0.4/spv.c:446: Nicht definierter Verweis auf `__gmpn_random I think it is a linker problem from g++. Any ideas how to fix it ? Greetings from Germany Bernhard

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2020-04-30, 20:21	#3
bhelmes Mar 2016 419 Posts	g++ -O3 -std=c++0x -pthread -mcmodel=medium -pedantic ./2x^2-1_220.cpp -l gmp /usr/local/lib/libgmp.a -lecm /usr/local/lib/libecm.a will do it.