Build error with fpm (gfortran)

[omaclaren]

Description

Hi!

I don't really know what I'm doing, but following the stdlib fpm build instructions I get to here:

fpm build --profile release

at which point I get the error message:

• gfortran -c ./src/stdlib_hash_64bit.f90 -O3 -funroll-loops -Wimplicit-interface -fPIC -fmax-errors=1 -fcoarray=single -J build/gfortran_EDF3F128DBFCA123 -Ibuild/gfortran_EDF3F128DBFCA123 -o build/gfortran_EDF3F128DBFCA123/stdlib/src_stdlib_hash_64bit.f90.o
  ./src/stdlib_hash_64bit.f90:66:29:

  66 | pow64_over_phi = int(z'9E3779B97F4A7C15', int64)
  | 1
  Error: Arithmetic overflow converting INTEGER(16) to INTEGER(8) at (1). This check can be disabled with the option '-fno-range-check'
  compilation terminated due to -fmax-errors=1.
  Compilation failed for object " src_stdlib_hash_64bit.f90.o "
  stopping due to failed compilation
  STOP 1

It's probably something that someone more up on things than me would be able to fix (see see comment below), but figured might be worth reporting anyway. I tried updating gfortran (not sure if this impacts fpm) from conda-forge but still no joy.

I also get the same error when trying to include stdlib in an fpm project toml file.

Expected Behaviour

I expected the build to work :-)

Version of stdlib

v0.1.0

Platform and Architecture

Ubuntu 20.04.3 (x86_64)

Additional Information

fpm info:

Version: 0.5.0, alpha
Program: fpm(1)
Description: A Fortran package manager and build system
Home Page: https://github.com/fortran-lang/fpm
License: MIT
OS Type: Linux

running:

gfortran --version
gives
GNU Fortran (GCC) 9.4.0

[omaclaren]

Update: using --flag -fno-range-check with fpm (as suggested by the error message) works, but I'm not sure if turning off this check is desirable or not.