Cannot build with fpm on Windows: .\src\C-canvas.c:84:10: fatal error: sys/utsname.h: No such file or directory

[Beliavsky]

On Windows, running fpm build gives this error:

c:\fortran\public_domain\github\general-purpose-fortran>fpm build

• gfortran -c .\src\C-buffer.c -Wall -Wextra -Wimplicit-interface -fPIC -fmax-errors=1 -g -fbounds-check -fcheck-array-temporaries -fbacktrace -fcoarray=single -J build\gfortran_debug\GPF -I build\gfortran_debug\GPF -o build\gfortran_debug\GPF\src_C-buffer.c.o
  cc1.exe: warning: command-line option '-Wimplicit-interface' is valid for Fortran but not for C
  cc1.exe: warning: command-line option '-fcheck-array-temporaries' is valid for Fortran but not for C
  cc1.exe: warning: command-line option '-fbacktrace' is valid for Fortran but not for C
  cc1.exe: warning: command-line option '-fcoarray=single' is valid for Fortran but not for C
• gfortran -c .\src\C-canvas.c -Wall -Wextra -Wimplicit-interface -fPIC -fmax-errors=1 -g -fbounds-check -fcheck-array-temporaries -fbacktrace -fcoarray=single -J build\gfortran_debug\GPF -I build\gfortran_debug\GPF -o build\gfortran_debug\GPF\src_C-canvas.c.o
  cc1.exe: warning: command-line option '-Wimplicit-interface' is valid for Fortran but not for C
  cc1.exe: warning: command-line option '-fcheck-array-temporaries' is valid for Fortran but not for C
  cc1.exe: warning: command-line option '-fbacktrace' is valid for Fortran but not for C
  cc1.exe: warning: command-line option '-fcoarray=single' is valid for Fortran but not for C
  .\src\C-canvas.c:84:10: fatal error: sys/utsname.h: No such file or directory
  84 | #include <sys/utsname.h>
  | ^~~~~~~~~~~~~~~
  compilation terminated.
  Command failed
  ERROR STOP

Error termination. Backtrace:

Could not print backtrace: libbacktrace could not find executable to open
#0 0xffffffff
#1 0xffffffff
#2 0xffffffff
#3 0xffffffff
#4 0xffffffff
#5 0xffffffff
#6 0xffffffff
#7 0xffffffff
#8 0xffffffff
#9 0xffffffff
#10 0xffffffff
#11 0xffffffff

Thanks for this project.

[urbanjost]

the sys/utsname.h header file is not a standard part of Windows, and not always on POSIX platforms by default. You will probably have to run in Cygwin or add WSL (assuming you have a newer WIndows OS) and build there; or change the code to not require
calling uname(3c) or whatever is dependent on the file. Are you using MSWIndows straight, or Mingw, MSYS2, Cygwin, ...

[Beliavsky]

I am using "MSWIndows straight".

[urbanjost]

MSWIndows has a non-POSIX proprietary OS; and uname(3c) is POSIX so you cannot call that routine from that environment without calling MSWIndows routines to emulate uname(3c), or using the WIndows Linux WLS interface, a virtual POSIX platform, Cygwin, ... or something that provides a POSIX environment. Can you use a POSIX environment instead? Otherwise, you have to change the code or create your own emulator of that routine (might be one on the WWW somewhere, but I did not see one taking a quick glance).