Compile error no executable created
June 8, 2020 at 5:16 am #5021bioluminescenceParticipant
When I used the “make” command for the bstep2D example problem, I received the following error messages. Would anyone know what is missing for the “M_PI” parameter? Thanks.
In file included from src/functors/lattice/blockLatticeLocalF3D.cpp:25:
src/functors/lattice/blockLatticeLocalF3D.hh: In constructor ‘olb::BlockLatticePhysTauFromBoundaryDistance3D<T, DESCRIPTOR, TDESCRIPTOR>::BlockLatticePhysTauFromBoundaryDistance3D(olb::BlockLatticeStructure3D<T, DESCRIPTOR>&, olb::BlockGeometryStructure3D<T>&, const olb::XMLreader&, const olb::ThermalUnitConverter<T, DESCRIPTOR, TDESCRIPTOR>&, T, T, T, T, T, T, T, T)’:
src/functors/lattice/blockLatticeLocalF3D.hh:1355:249: error: ‘M_PI’ was not declared in this scope
1355 | : BlockLatticeThermalPhysF3D<T,DESCRIPTOR,TDESCRIPTOR>(blockLattice,converter,1), _blockGeometry(blockGeometry), _distanceFunctor(blockLattice, blockGeometry, xmlReader), _tmp1(lambda_0 * 287.058 * T_avg / p / c_p), _tmp2(2. * beta / (sqrt(2.) * M_PI * sigma * sigma * p * n_0 / p_0))
make: *** [Makefile:66: build/precompiled/obj/src/functors/lattice/blockLatticeLocalF3D.o] Error 1June 8, 2020 at 11:07 am #5023
M_PI is a constant with the value pi. It is defined in the math.h library. So you just have to add the line
Which version of OpenLB are you using? I cannot reproduce the error on version 1.3.1
RobinAugust 19, 2020 at 10:51 am #5100
I have the same problem : M_PI not defined 🙁
I am using 1.3r1 (with cygwin64 on windows10)
where do i have to add the line
ThomasAugust 19, 2020 at 11:03 am #5101
I checked the file “blockLatticeLocalF3D.hh” : at the beginning of the file, there are the following includes
so math.h is already include 🙁
to avoid the crash, i added the following line
const double M_PI = 3.14159265359;in file “blockLatticeLocalF3D.hh” just before the use of M_PiAugust 19, 2020 at 4:39 pm #5102
I was not able to reproduce this exact error. Defining the constant is a good woraround. However to prevent such error in future releases, could you try to add
before alle the includes in this file and see if that solves the issue?
RobinAugust 20, 2020 at 10:22 am #5103
the issue is not solved with this solution 🙁
if you want to try another solution, i can do it 😉August 20, 2020 at 3:31 pm #5104
for now defining the constant seems to be the best solution.
I will try to reproduce the issue, which compiler do you use and what is the version of your compiler and Cygwin?
As you are using windows 10, I suggest you could also switch to the windows subsystem for linux (please see https://www.openlb.net/tech-reports/ TR5).
RobinSeptember 4, 2020 at 2:02 am #5113shreyas_ashokParticipant
Just wanted to let you know that I experienced the same issue running the laminar poiseuille2d case. I defined M_PI manually in “blockLatticeLocalF3D.hh” and it worked again.
I’m on Windows 10 using Cygwin64. I’m using OpenLB v1.3r1.
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