Compile/link broken for nim (64-bit only) on Windows

[rivy]

nim (64-bit version) compiles fail when using gcc (64-bit version), disagreeing on target architecture. Failures occur even when specifying cpu. The included default nim configuration is used.

gcc otherwise works fully/correctly on the same machine.

Notably, using nim (32-bit) with gcc (32-bit) works just fine (although obviously unable to compile to a 64-bit target).

64-bit output

C:\Users\Roy\nim\hello-world>type hello.nim
# This is a comment
echo "Hello, ", "world!"

C:\Users\Roy\nim\hello-world>gcc --version
gcc (x86_64-posix-seh-rev0, Built by MinGW-W64 project) 8.1.0
Copyright (C) 2018 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.

C:\Users\Roy\nim\hello-world>nim --version
Nim Compiler Version 1.0.2 [Windows: amd64]
Compiled at 2019-10-22
Copyright (c) 2006-2019 by Andreas Rumpf

git hash: 193b3c66bbeffafaebff166d24b9866f1eaaac0e
active boot switches: -d:release

C:\Users\Roy\nim\hello-world>nim c hello.nim
Hint: used config file 'C:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x64\config\nim.cfg' [Conf]
Hint: used config file 'C:\Users\Roy\AppData\Roaming\nim\nim.cfg' [Conf]
Hint: system [Processing]
Hint: widestrs [Processing]
Hint: io [Processing]
Hint: hello [Processing]
CC: stdlib_io.nim
CC: stdlib_system.nim
CC: hello.nim
Error: execution of an external compiler program 'gcc.exe -c  -w -mno-ms-bitfields  -IC:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x64\lib -IC:\Users\Roy\nim\hello-world -o C:\Users\Roy\nimcache\hello_d\@mhello.nim.c.o C:\Users\Roy\nimcache\hello_d\@mhello.nim.c' failed with exit code: 1

In file included from C:\Users\Roy\nimcache\hello_d\@mhello.nim.c:9:
C:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x64\lib/nimbase.h:457:13: error: size of array 'Nim_and_C_compiler_disagree_on_target_architecture' is negative
 typedef int Nim_and_C_compiler_disagree_on_target_architecture[sizeof(NI) == sizeof(void*) && NIM_INTBITS == sizeof(NI)*8 ? 1 : -1];
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

C:\Users\Roy\nim\hello-world>nim --cc:gcc --cpu:amd64 c hello.nim
Hint: used config file 'C:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x64\config\nim.cfg' [Conf]
Hint: used config file 'C:\Users\Roy\AppData\Roaming\nim\nim.cfg' [Conf]
Hint: system [Processing]
Hint: widestrs [Processing]
Hint: io [Processing]
Hint: hello [Processing]
CC: stdlib_io.nim
CC: stdlib_system.nim
CC: hello.nim
Error: execution of an external compiler program 'gcc.exe -c -w -mno-ms-bitfields  -IC:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x64\lib -IC:\Users\Roy\nim\hello-world -o C:\Users\Roy\nimcache\hello_d\@mhello.nim.c.o C:\Users\Roy\nimcache\hello_d\@mhello.nim.c' failed with exit code: 1

In file included from C:\Users\Roy\nimcache\hello_d\@mhello.nim.c:9:
C:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x64\lib/nimbase.h:457:13: error: size of array 'Nim_and_C_compiler_disagree_on_target_architecture' is negative
 typedef int Nim_and_C_compiler_disagree_on_target_architecture[sizeof(NI) == sizeof(void*) && NIM_INTBITS == sizeof(NI)*8 ? 1 : -1];
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

C:\Users\Roy\nim\hello-world>nim --cc:gcc --cpu:i386 c hello.nim
Hint: used config file 'C:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x64\config\nim.cfg' [Conf]
Hint: used config file 'C:\Users\Roy\AppData\Roaming\nim\nim.cfg' [Conf]
Hint: system [Processing]
Hint: widestrs [Processing]
Hint: io [Processing]
Hint: hello [Processing]
CC: stdlib_io.nim
CC: stdlib_system.nim
CC: hello.nim
Error: execution of an external compiler program 'gcc.exe -c -w -mno-ms-bitfields  -IC:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x64\lib -IC:\Users\Roy\nim\hello-world -o C:\Users\Roy\nimcache\hello_d\@mhello.nim.c.o C:\Users\Roy\nimcache\hello_d\@mhello.nim.c' failed with exit code: 1

In file included from C:\Users\Roy\nimcache\hello_d\@mhello.nim.c:9:
C:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x64\lib/nimbase.h:457:13: error: size of array 'Nim_and_C_compiler_disagree_on_target_architecture' is negative
 typedef int Nim_and_C_compiler_disagree_on_target_architecture[sizeof(NI) == sizeof(void*) && NIM_INTBITS == sizeof(NI)*8 ? 1 : -1];
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

32-bit output

C:\Users\Roy\nim\hello-world>type hello.nim
# This is a comment
echo "Hello, ", "world!"

C:\Users\Roy\nim\hello-world>gcc --version
gcc (i686-posix-dwarf-rev0, Built by MinGW-W64 project) 8.1.0
Copyright (C) 2018 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.

C:\Users\Roy\nim\hello-world>nim --version
Nim Compiler Version 1.0.2 [Windows: i386]
Compiled at 2019-10-22
Copyright (c) 2006-2019 by Andreas Rumpf

git hash: 193b3c66bbeffafaebff166d24b9866f1eaaac0e
active boot switches: -d:release

C:\Users\Roy\nim\hello-world>nim c hello.nim
Hint: used config file 'C:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x32\config\nim.cfg' [Conf]
Hint: used config file 'C:\Users\Roy\AppData\Roaming\nim\nim.cfg' [Conf]
Hint: system [Processing]
Hint: widestrs [Processing]
Hint: io [Processing]
Hint: hello [Processing]
CC: stdlib_io.nim
CC: stdlib_system.nim
CC: hello.nim
Hint:  [Link]
Hint: operation successful (14407 lines compiled; 1.596 sec total; 10.633MiB peakmem; Debug Build) [SuccessX]

C:\Users\Roy\nim\hello-world>nim --cc:gcc --cpu:i386 c hello.nim
Hint: used config file 'C:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x32\config\nim.cfg' [Conf]
Hint: used config file 'C:\Users\Roy\AppData\Roaming\nim\nim.cfg' [Conf]
Hint: system [Processing]
Hint: widestrs [Processing]
Hint: io [Processing]
Hint: hello [Processing]
CC: stdlib_io.nim
CC: stdlib_system.nim
CC: hello.nim
Hint:  [Link]
Hint: operation successful (14407 lines compiled; 1.295 sec total; 10.633MiB peakmem; Debug Build) [SuccessX]

C:\Users\Roy\nim\hello-world>nim --cc:gcc --cpu:amd64 c hello.nim
Hint: used config file 'C:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x32\config\nim.cfg' [Conf]
Hint: used config file 'C:\Users\Roy\AppData\Roaming\nim\nim.cfg' [Conf]
Hint: system [Processing]
Hint: widestrs [Processing]
Hint: io [Processing]
Hint: hello [Processing]
CC: stdlib_io.nim
CC: stdlib_system.nim
CC: hello.nim
Error: execution of an external compiler program 'gcc.exe -c -w -mno-ms-bitfields  -IC:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x32\lib -IC:\Users\Roy\nim\hello-world -o C:\Users\Roy\nimcache\hello_d\@mhello.nim.c.o C:\Users\Roy\nimcache\hello_d\@mhello.nim.c' failed with exit code: 1

In file included from C:\Users\Roy\nimcache\hello_d\@mhello.nim.c:9:
C:\Users\Roy\AppData\Local\scoop\apps\nim\1.0.2-x32\lib/nimbase.h:457:13: error: size of array 'Nim_and_C_compiler_disagree_on_target_architecture' is negative
 typedef int Nim_and_C_compiler_disagree_on_target_architecture[sizeof(NI) == sizeof(void*) && NIM_INTBITS == sizeof(NI)*8 ? 1 : -1];
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[rivy]

I'm happy to troubleshoot further if needed and directed.

Thanks for the attention.

[genotrance]

Please retry with -f or delete C:\Users\Roy\nimcache\hello_d.

[rivy]

Thanks for the quick response.

I had previously seen the cache directory and tried removing both the hello_d and the entire directory without success.

I just tried using the -f option. Unfortunately, no success with that either.

[rivy]

Hmm... I looked back through the compile and looked again at the local configuration file.

It had a cpu = i386 line in it. Disabling that line corrects the problem.

But, I would have thought nim --cpu:amd64 c hello.nim would have overridden the configuration option and allowed a successful compilation.

[demotomohiro]

You get such error when Nim compiler trying to build a executable file for 32bit CPU with backend C compiler for 64bit CPU.
In your case, it seems cpu=i386 is set but Nim calls gcc for amd64 CPU.

Nim Compiler User Guide says:

Command line settings have priority over configuration file settings.

But when I set cpu=i386 in nim.cfg and run nim with --cpu:amd64, I got Nim_and_C_compiler_disagree_on_target_architecture error.
It looks like --cpu:amd64 option in a command line doesn't override cpu=i386 option in a configuration file.

I tested following code on 64bit Linux without gcc for i386 CPU.

nim.cfg:

cpu=i386

test.nim:

echo"test"

Output:

user@linux /tmp/tmp $ nim c --cpu:amd64 test.nim
Hint: used config file '/etc/nim/nim.cfg' [Conf]
Hint: used config file '/home/user/.config/nim/nim.cfg' [Conf]
Hint: used config file '/tmp/tmp/nim.cfg' [Conf]
Hint: system [Processing]
Hint: widestrs [Processing]
Hint: io [Processing]
Hint: test [Processing]
CC: stdlib_io.nim
CC: stdlib_system.nim
CC: test.nim
Error: execution of an external compiler program 'gcc -c  -w  -I/usr/lib/nim -I/tmp/tmp -o /tmp/nimcache/d/test/@mtest.nim.c.o
 /tmp/nimcache/d/test/@mtest.nim.c' failed with exit code: 1

In file included from /tmp/nimcache/d/test/@mtest.nim.c:9:
/usr/lib/nim/nimbase.h:457:13: error: size of array ‘Nim_and_C_compiler_disagree_on_target_architecture’ is negative
 typedef int Nim_and_C_compiler_disagree_on_target_architecture[sizeof(NI) == sizeof(void*) && NIM_INTBITS == sizeof(NI)*8 ? 1
 : -1];
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

user@linux /tmp/tmp $ nim -v
Nim Compiler Version 1.0.2 [Linux: amd64]
Compiled at 2019-10-28
Copyright (c) 2006-2019 by Andreas Rumpf

active boot switches: -d:release

When I set cpu=amd64 in nim.cfg and --cpu:i386 on command line, I got same error.
I also tested same code with same cfg file and same command, I got same error on Windows 8.1.

[rivy]

Thanks for the fix.
I haven't been able to test it for my setup because the related nightly release doesn't include the windows builds in the assets.