My software compiles and runs fine but when I add the -race option to check for race conditions it does not build:
GOROOT=C:\Go
GOPATH=<deleted>;D:\Golang
C:\Go\bin\go.exe build -race -o C:\Users\Andrewp\AppData\Local\Temp\___1Race_Detector.exe -gcflags "-N -l" -a <deleted>
# runtime/cgo
gcc_libinit_windows.c: In function 'x_cgo_sys_thread_create':
gcc_libinit_windows.c:56:12: error: implicit declaration of function '_beginthread' [-Werror=implicit-function-declaration]
thandle = _beginthread(func, 0, arg);
^
cc1: all warnings being treated as errors
Compilation finished with exit code 2
Note that it worked previously but I have since upgraded to go version go1.9.2 windows/amd64 (though I don't think that is related). Also have MSYS installed.
Also I am building with GoLand (under Windows 10) but I get the same problem when I build from the command line.
Does anyone have info on how the Go compiler works esp. when using race detector or cgo, so I can track down the cause of this?
Extra info: I can build fine from the terminal using:
go build -race
It seems that the problem is caused by the -a option that GoLand added to the command line since this almost identical command line fails:
go build -race -a .
But this is OK:
go build -a .
Details are in this issue. A workaround is usually to set -vet=off