unable to build cube.cxx with circle build 200

[bartman]

It's not clear to me what the error actually is here.
I get similar errors with other source code in this repo.
Most simpler programs from the circle repo work.
Some do not: seanbaxter/circle#193

$ circle --version
circle version 1.0.0-200
  Circle public preview build 200
  Built Jul 29 2023 11:15:57 EDT
  (c) 2023 Sean Baxter
  https://www.circle-lang.org/
  Twitter: @seanbax

$ git remote -v
origin  https://github.com/seanbaxter/shaders.git (fetch)
origin  https://github.com/seanbaxter/shaders.git (push)

$ git describe --always
185c6e8

$ cmake -Bbuild -S. -DCMAKE_CXX_COMPILER=circle
-- The C compiler identification is GNU 13.2.0
-- The CXX compiler identification is Clang 5.0.0
...

$ cmake --build build
[ 50%] Building CXX object CMakeFiles/cube.dir/cube.cxx.o
error: SPIR-V implicit declarations:315:83
cannot convert prvalue int to <2 x float>
GLSL_PREFIX vec2   [[spirv::GLSLstd450(6)]] sign(vec2   a) noexcept { return a >= 0 ? 1.f : -1.f; }
                                                                                  ^

error: SPIR-V implicit declarations:316:83
cannot convert prvalue int to <3 x float>
GLSL_PREFIX vec3   [[spirv::GLSLstd450(6)]] sign(vec3   a) noexcept { return a >= 0 ? 1.f : -1.f; }
                                                                                  ^

error: SPIR-V implicit declarations:317:83
cannot convert prvalue int to <4 x float>
GLSL_PREFIX vec4   [[spirv::GLSLstd450(6)]] sign(vec4   a) noexcept { return a >= 0 ? 1.f : -1.f; }
                                                                                  ^

error: SPIR-V implicit declarations:319:83
cannot convert prvalue int to <2 x double>
GLSL_PREFIX dvec2  [[spirv::GLSLstd450(6)]] sign(dvec2  a) noexcept { return a >= 0 ? 1.0 : -1.0; }
                                                                                  ^

error: SPIR-V implicit declarations:320:83
cannot convert prvalue int to <3 x double>
GLSL_PREFIX dvec3  [[spirv::GLSLstd450(6)]] sign(dvec3  a) noexcept { return a >= 0 ? 1.0 : -1.0; }
                                                                                  ^

error: SPIR-V implicit declarations:321:83
cannot convert prvalue int to <4 x double>
GLSL_PREFIX dvec4  [[spirv::GLSLstd450(6)]] sign(dvec4  a) noexcept { return a >= 0 ? 1.0 : -1.0; }
                                                                                  ^

error: SPIR-V implicit declarations:442:103
cannot convert prvalue int to <2 x float>
GLSL_PREFIX vec2   [[spirv::GLSLstd450(46)]] mix(vec2   x, vec2   y, vec2   a) noexcept { return x * (1 - a) + y * a; }
                                                                                                      ^

error: SPIR-V implicit declarations:443:103
cannot convert prvalue int to <3 x float>
GLSL_PREFIX vec3   [[spirv::GLSLstd450(46)]] mix(vec3   x, vec3   y, vec3   a) noexcept { return x * (1 - a) + y * a; }
                                                                                                      ^

error: SPIR-V implicit declarations:444:103
cannot convert prvalue int to <4 x float>
GLSL_PREFIX vec4   [[spirv::GLSLstd450(46)]] mix(vec4   x, vec4   y, vec4   a) noexcept { return x * (1 - a) + y * a; }
                                                                                                      ^

error: SPIR-V implicit declarations:446:103
cannot convert prvalue int to <2 x double>
GLSL_PREFIX dvec2  [[spirv::GLSLstd450(46)]] mix(dvec2  x, dvec2  y, dvec2  a) noexcept { return x * (1 - a) + y * a; }
                                                                                                      ^

error: SPIR-V implicit declarations:447:103
cannot convert prvalue int to <3 x double>
GLSL_PREFIX dvec3  [[spirv::GLSLstd450(46)]] mix(dvec3  x, dvec3  y, dvec3  a) noexcept { return x * (1 - a) + y * a; }
                                                                                                      ^

error: translation aborted; too many errors

gmake[2]: *** [CMakeFiles/cube.dir/build.make:76: CMakeFiles/cube.dir/cube.cxx.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:83: CMakeFiles/cube.dir/all] Error 2
gmake: *** [Makefile:91: all] Error 2

[Ikaron]

Just came to say I have the exact same issue. Even compiling an entirely empty file, if it's compiled with the -shader flag.