compile error

[c-bug]

running make, I get these errors.

g++ -std=c++17 -O2 -DREV=\"`git rev-parse --short HEAD``git diff-files --quiet || echo -mod`\" -Wall Pm1Plan.cpp GmpUtil.cpp Worktodo.cpp common.cpp gpuowl.cpp Gpu.cpp clwrap.cpp Task.cpp checkpoint.cpp timeutil.cpp Args.cpp Primes.cpp state.cpp Signal.cpp FFTConfig.cpp -o openowl -lOpenCL -lgmp -pthread -L/opt/rocm/opencl/lib/x86_64 -L/opt/amdgpu-pro/lib/x86_64-linux-gnu -L/c/Windows/System32 -L.
Gpu.cpp: In function ‘void logTimeKernels(std::initializer_list<Kernel*>)’:
Gpu.cpp:153:14: error: expected unqualified-id before ‘[’ token
   for (auto& [stats, name]: infos) {
              ^
Gpu.cpp:153:14: error: expected ‘;’ before ‘[’ token
Gpu.cpp:153:15: error: ‘stats’ was not declared in this scope
   for (auto& [stats, name]: infos) {
               ^~~~~
Gpu.cpp:153:22: error: ‘name’ was not declared in this scope
   for (auto& [stats, name]: infos) {
                      ^~~~
Gpu.cpp: In lambda function:
Gpu.cpp:153:27: error: expected ‘{’ before ‘:’ token
   for (auto& [stats, name]: infos) {
                           ^
Gpu.cpp: In function ‘void logTimeKernels(std::initializer_list<Kernel*>)’:
Gpu.cpp:153:27: error: expected ‘;’ before ‘:’ token
Gpu.cpp:153:27: error: expected primary-expression before ‘:’ token
Gpu.cpp:153:27: error: expected ‘)’ before ‘:’ token
Gpu.cpp:153:27: error: expected primary-expression before ‘:’ token
Gpu.cpp: In member function ‘std::__cxx11::string Gpu::factorPM1(u32, const Args&, u32, u32)’:
Gpu.cpp:610:8: error: expected unqualified-id before ‘[’ token
   auto [block, nPrimes, allSelected] = makePm1Plan(D, B1, B2);
        ^
Gpu.cpp:611:17: error: ‘allSelected’ was not declared in this scope
   u32 nBlocks = allSelected.size();
                 ^~~~~~~~~~~
Gpu.cpp:612:70: error: ‘block’ was not declared in this scope
   log("%u P-1 stage2: %u blocks starting at block %u\n", E, nBlocks, block);
                                                                      ^~~~~
Gpu.cpp:681:39: error: unable to deduce ‘auto&&’ from ‘allSelected’
   for (const vector<bool>& selected : allSelected) {
                                       ^~~~~~~~~~~
Gpu.cpp:708:61: error: ‘nPrimes’ was not declared in this scope
         float percent = (nPrimesDone + nBlocksDone) / float(nPrimes + nBlocks) * 100;
                                                             ^~~~~~~
Task.cpp: In member function ‘bool Task::execute(const Args&)’:
Task.cpp:62:10: error: expected unqualified-id before ‘[’ token
     auto [isPrime, res64] = gpu->isPrimePRP(exponent, args);
          ^
Task.cpp:63:33: error: ‘isPrime’ was not declared in this scope
     return writeResultPRP(args, isPrime, res64, fftSize);
                                 ^~~~~~~
Task.cpp:63:42: error: ‘res64’ was not declared in this scope
     return writeResultPRP(args, isPrime, res64, fftSize);
                                          ^~~~~
Makefile:9: recipe for target 'openowl' failed
make: *** [openowl] Error 1

[valeriob01]

What system is it? I have compiled without problems!

[c-bug]

Oh sorry,
debian stretch.

[valeriob01]

I have compiled successfully on debian testing, have you installed all the dependencies ?

[c-bug]

Which dependencies? Based on the readme I need a compiler and the OpenCL library?
mfakto compiled without problems, if that helps.

[valeriob01]

You need the libgmp-dev package.

[c-bug]

Oh, I got that, apt tells me
libgmp-dev is already the newest version (2:6.1.2+dfsg-1).

[valeriob01]

Ok, then your drivers or library are too old?
Driver version?
OpenCL version?

[preda]

What version is your compiler:
g++ --version
thanks

[c-bug]

Linux 4.19.0-0.bpo.1-amd64
OpenCL 2.1 AMD-APP (2639.3)

g++ (Debian 6.3.0-18+deb9u1) 6.3.0 20170516
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[preda]

OK. Structured bindings, which are part of C++17, are available in gcc starting from gcc 7 according to
https://gcc.gnu.org/projects/cxx-status.html

Could you update your g++, to 7.x or 8.x ?

[valeriob01]

I have made a search and it shows that g++7 and g++8 are only available in Debian Buster (testing).

[preda]

I'm going to close this. The situation was caused by the c++ compiler not properly supported c++17.