go build: gives error "implicit declaration of function _beginthread"

[Monsler]

Command:
go build -ldflags '-s -w'
Compiler: clang

Output:

# runtime/cgo
gcc_libinit_windows.c:143:13: error: implicit declaration of function '_beginthread' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
gcc_libinit_windows.c:143:13: note: did you mean '_cgo_beginthread'?
gcc_libinit_windows.c:138:6: note: '_cgo_beginthread' declared here```

[mappu]

Some people had this problem in golang/go#59490

In that case, it was caused because the discovered CC was cygwin-gcc instead of mingw-w64 gcc.

• If you run go env, what does it say for CC and CXX?

$ go env
[...]
CC="gcc"
CXX="g++"

• Does it help to try this command: CC=clang CXX=clang++ go build -ldflags '-s -w'

[Monsler]

@mappu Hello! sorry for a late answer. As i use powershell i did it like that:

$env:CC="clang"
$enc:CXX="clang++"

After executing go env, the output is:

[...]
CC="clang"
CXX="clang++"

But when i run go build again, the error is still here.