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mratsim avatar mratsim commented on June 20, 2024

It seems like the MacOS CI is now using ARM CPUs:
image

and the make_headers task assumes it is running on x86

  Executing task make_lib in /Users/runner/work/constantine/constantine/constantine/constantine.nimble
Compiling static library:  lib/libconstantine.a.arm
Compiling static library:  lib/libconstantine.a.x64
Compiling dynamic library: lib/libconstantine.dylib.arm
ld: warning: ignoring duplicate libraries: '-lm'
Compiling dynamic library: lib/libconstantine.dylib.x64
ld: warning: ignoring duplicate libraries: '-lm'
  Executing task make_headers in /Users/runner/work/constantine/constantine/constantine/constantine.nimble
/Users/runner/work/constantine/constantine/constantine/nimcache/libcurves_headers/@m..@sconstantine@splatforms@sisa@scpudetect_x86.nim.c:80:8: error: invalid output constraint '=a' in asm
      :"=a"(result.eax), "=b"(result.ebx), "=c"(result.ecx), "=d"(result.edx)
       ^

However building a fat binary for both x86 and ARM works well.

from constantine.

mratsim avatar mratsim commented on June 20, 2024

Cross-compiling for Linux ARM64 on Linux x86 host works with Clang.

However looking at the error message we can see Nim Compiler version 1.6.21 [MacOSX: amd64]
but the host is actually arm64-apple-darwin23.4.0

So I suspect Nim is actually running through Rosetta and "thinks" it is on a x86 platform, which leads to this const X86 check being mistakenly true:

constantine/constantine/platforms/config.nim

Lines 12 to 13 in 976c8bb

const GCC_Compatible* = defined(gcc) or defined(clang) or defined(llvm_gcc) or defined(icc)
const X86* = defined(amd64) or defined(i386)

from constantine.

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