Error when compiling: expression must have a constant value

[DamynChipman]

Bug report

Describe the bug

When compiling, I get the following same error in three locations:

"src/t8_cmesh/t8_cmesh_examples.cxx", line 3142: error: expression must have a constant value
    constexpr double _CBRT = std::cbrt (1.0);
                             ^

"src/t8_cmesh/t8_cmesh_examples.cxx", line 3223: error: expression must have a constant value
    constexpr double _CBRT = std::cbrt (1.0);
                             ^

"src/t8_cmesh/t8_cmesh_examples.cxx", line 3517: error: expression must have a constant value
    constexpr double _CBRT = std::cbrt(1.0);
                             ^

I've tried this with the Autotools and CMake build systems on both my laptop and a Linux cluster with the same bugs. I've also tried using different C/C++ standards to no avail.

I had t8code compiled and running a few weeks ago as part of a JOSS review (openjournals/joss-reviews#6887). Perhaps this is from recent changes?

To Reproduce

I followed the installation instructions from the Wiki exactly except for system specific pieces.

Expected behavior

Code compiles to completion.

Log files

CMakeCache.txt

For some reason, there is no CMakeFiles/CMakeError.log or CMakeFiles/CMakeOutput.log. Here is the output of the make step:

>>> make
[  0%] Built target iniparser
[  1%] Built target libb64
[  5%] Built target sc
[  6%] Built target sc_function
[  6%] Built target sc_logging
[  6%] Built target sc_test_shmem
[  6%] Built target sc_options
[  7%] Built target sc_pthread
[  7%] Built target sc_test_allgather
[  7%] Built target sc_test_arrays
[  8%] Built target sc_test_keyvalue
[  8%] Built target sc_test_notify
[  9%] Built target sc_test_reduce
[  9%] Built target sc_test_search
[  9%] Built target sc_test_sortb
[  9%] Built target sc_test_version
[  9%] Built target sc_test_node_comm
[  9%] Built target sc_test_helpers
[ 10%] Built target sc_test_sort
[ 11%] Built target sc_test_builtin
[ 11%] Built target sc_test_io_sink
[ 13%] Built target p6est
[ 16%] Built target p8est
[ 20%] Built target p4est
[ 20%] Built target test_comm
[ 20%] Built target test_hash
[ 20%] Built target test_order
[ 20%] Built target test_complete_subtree
[ 20%] Built target test_conn_transformation2
[ 21%] Built target test_brick2
[ 21%] Built target test_join2
[ 21%] Built target test_conn_reduce2
[ 21%] Built target test_balance2
[ 21%] Built target test_partition_corr2
[ 21%] Built target test_coarsen2
[ 21%] Built target test_balance_type2
[ 22%] Built target test_lnodes2
[ 22%] Built target test_plex2
[ 23%] Built target test_connrefine2
[ 23%] Built target test_search2
[ 23%] Built target test_subcomm2
[ 23%] Built target test_replace2
[ 23%] Built target test_ghost2
[ 23%] Built target test_iterate2
[ 24%] Built target test_nodes2
[ 25%] Built target test_partition2
[ 26%] Built target test_quadrants2
[ 26%] Built target test_valid2
[ 27%] Built target test_conn_complete2
[ 28%] Built target test_wrap2
[ 28%] Built target test_load2
[ 28%] Built target test_loadsave2
[ 29%] Built target test_balance_seeds2
[ 30%] Built target test_all6
[ 30%] Built target test_conn_transformation3
[ 30%] Built target test_brick3
[ 30%] Built target test_join3
[ 31%] Built target test_conn_reduce3
[ 31%] Built target test_mesh_corners3
[ 31%] Built target test_balance3
[ 32%] Built target test_partition_corr3
[ 33%] Built target test_coarsen3
[ 33%] Built target test_balance_type3
[ 33%] Built target test_lnodes3
[ 33%] Built target test_plex3
[ 33%] Built target test_connrefine3
[ 34%] Built target test_subcomm3
[ 35%] Built target test_replace3
[ 36%] Built target test_ghost3
[ 37%] Built target test_iterate3
[ 37%] Built target test_nodes3
[ 37%] Built target test_partition3
[ 37%] Built target test_quadrants3
[ 37%] Built target test_valid3
[ 37%] Built target test_conn_complete3
[ 37%] Built target test_wrap3
[ 38%] Built target test_load3
[ 38%] Built target points2
[ 39%] Built target points3
[ 39%] Built target generate_points2
[ 40%] Built target generate_points3
[ 40%] Built target particles2
[ 41%] Built target particles3
[ 41%] Built target bricks2
[ 41%] Built target bricks3
[ 41%] Built target timings2
[ 42%] Built target timings3
[ 42%] Built target loadconn2
[ 42%] Built target loadconn3
[ 42%] Built target tsearch3
[ 42%] Built target balance_seeds2
[ 43%] Built target balance_seeds3
[ 44%] Built target balance_corner2
[ 44%] Built target balance_corner3
[ 45%] Built target mesh2
[ 45%] Built target mesh3
[ 46%] Built target simple2
[ 46%] Built target simple3
[ 46%] Built target periodicity3
[ 47%] Built target count_quadrants2
[ 47%] Built target count_quadrants3
[ 47%] Built target read_conn2
[ 47%] Built target read_conn3
[ 47%] Built target write_conn2
[ 48%] Built target write_conn3
[ 49%] Built target read_tetgen
[ 49%] Built target spheres2
[ 50%] Built target spheres3
[ 50%] Built target p4est_step1
[ 51%] Built target p8est_step1
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[ 51%] Built target p8est_step2
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[ 53%] Built target p8est_step5
[ 53%] Building CXX object src/CMakeFiles/T8.dir/t8_cmesh/t8_cmesh_examples.cxx.o
/Users/damynchipman/packages/t8code/src/t8_cmesh/t8_cmesh_examples.cxx:3142:20: error: constexpr variable '_CBRT' must be initialized by a constant expression
  constexpr double _CBRT = std::cbrt (1.0);
                   ^       ~~~~~~~~~~~~~~~
/Users/damynchipman/packages/t8code/src/t8_cmesh/t8_cmesh_examples.cxx:3142:28: note: non-constexpr function 'cbrt' cannot be used in a constant expression
  constexpr double _CBRT = std::cbrt (1.0);
                           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk/usr/include/math.h:422:15: note: declared here
extern double cbrt(double);
              ^
/Users/damynchipman/packages/t8code/src/t8_cmesh/t8_cmesh_examples.cxx:3223:20: error: constexpr variable '_CBRT' must be initialized by a constant expression
  constexpr double _CBRT = std::cbrt (1.0);
                   ^       ~~~~~~~~~~~~~~~
/Users/damynchipman/packages/t8code/src/t8_cmesh/t8_cmesh_examples.cxx:3223:28: note: non-constexpr function 'cbrt' cannot be used in a constant expression
  constexpr double _CBRT = std::cbrt (1.0);
                           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk/usr/include/math.h:422:15: note: declared here
extern double cbrt(double);
              ^
/Users/damynchipman/packages/t8code/src/t8_cmesh/t8_cmesh_examples.cxx:3517:20: error: constexpr variable '_CBRT' must be initialized by a constant expression
  constexpr double _CBRT = std::cbrt(1.0);
                   ^       ~~~~~~~~~~~~~~
/Users/damynchipman/packages/t8code/src/t8_cmesh/t8_cmesh_examples.cxx:3517:28: note: non-constexpr function 'cbrt' cannot be used in a constant expression
  constexpr double _CBRT = std::cbrt(1.0);
                           ^
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk/usr/include/math.h:422:15: note: declared here
extern double cbrt(double);
              ^
3 errors generated.
make[2]: *** [src/CMakeFiles/T8.dir/t8_cmesh/t8_cmesh_examples.cxx.o] Error 1
make[1]: *** [src/CMakeFiles/T8.dir/all] Error 2
make: *** [all] Error 2

Environment (please complete the following information):

• OS: MacOS
• Compiler: OpenMPI
• Compiler version:

>>> mpicc --version
Apple clang version 15.0.0 (clang-1500.3.9.4)
Target: arm64-apple-darwin23.0.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

Estimated priority

"Priority: medium" Should be solved within half a year

[Davknapp]

Thanks for submitting this Issue! We will have a look at it and report back to you as soon as we have updates.

[jmark]

A fix is in the pipeline. Thank you for raising this issue.