win7 64-bit platforms, cgo compiler error #6731
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from windows xp, 32bit, test as following: E:\win_amd64_cgo_test_OK_version>go build test.go # command-line-arguments C:\DOCUME~1\kovi\LOCALS~1\Temp\go-build030420267\command-line-arguments\_obj\tes t.cgo2.o: In function `cgo_2c321763ad73_Cfunc_x': E:/win_amd64_cgo_test_OK_version/test.go:37: undefined reference to `x' collect2.exe: error: ld returned 1 exit status E:\win_amd64_cgo_test_OK_version>go build E:\win_amd64_cgo_test_OK_version>win_amd64_cgo_test_OK_version.exe Invoking c library... Hello World>>>>>>> Done 13 E:\win_amd64_cgo_test_OK_version> |
I don't see a bug here. "go build test.go" builds the single program test.go. It doesn't do cgo support or anything else. "go build" builds the package in the directory in which you run the command. It does cgo support. It seems that you are showing that "go build" works but "go build test.go" fails. That is expected. Please reopen and explain if I have misunderstood. Status changed to WorkingAsIntended. |
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by anwar.root:
This source code in the attachment, the purpose is to test the windows platform golang cgo calls; Of course, in my project also used in this way calls D:\win_amd64_cgo_test>gcc -O2 -c foo.c D:\win_amd64_cgo_test>ar q libfoo.a foo.o D:\win_amd64_cgo_test>go version go version go1.2rc3 windows/amd64 D:\win_amd64_cgo_test>go build test.go ---> By 'go build', with the name of the program 'test.go' way of compiling # command-line-arguments x(0): not defined ---> Produces undefined, but the program 'test.exe' has been compiled out! D:\win_amd64_cgo_test>test.exe ---> To run it, but there is a serious error output! Invoking c library... panic: invalid memory address or nil pointer dereference fatal error: panic during malloc [signal 0xc0000005 code=0x0 addr=0x50 pc=0x41d2aa] runtime stack: runtime.panic(0x4a8480, 0x5883f8) C:/Users/ADMINI~1/AppData/Local/Temp/2/bindist960365359/go/src/pkg/runtime/panic.c:233 +0x2c runtime: unexpected return pc for _cgo_2c321763ad73_Cfunc_x called from 0x2 goroutine 1 [syscall]: runtime.cgocall(0x47d6b7, 0x692eb8) C:/Users/ADMINI~1/AppData/Local/Temp/2/bindist960365359/go/src/pkg/runtime/cgocall.c:149 +0x120 fp=0x692ea0 main._Cfunc_x(0xa, 0x16) C:/Users/ADMINI~1/AppData/Local/Temp/go-build126955343/command-line-arguments/_obj/_cgo_defun.c:52 +0x34 fp=0x692eb8 main.main() D:/win_amd64_cgo_test/test.go:12 +0x59 fp=0x692f48 runtime.main() C:/Users/ADMINI~1/AppData/Local/Temp/2/bindist960365359/go/src/pkg/runtime/proc.c:220 +0x132 fp=0x692fa0 runtime.goexit() C:/Users/ADMINI~1/AppData/Local/Temp/2/bindist960365359/go/src/pkg/runtime/proc.c:1394 fp=0x692fa8 goroutine 3 [syscall]: runtime.goexit() C:/Users/ADMINI~1/AppData/Local/Temp/2/bindist960365359/go/src/pkg/runtime/proc.c:1394 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ The same procedure, the following compilation mode D:\win_amd64_cgo_test>go version go version go1.2rc3 windows/amd64 D:\win_amd64_cgo_test>go build ---> Direct hit go build; without a program name, the compiler generated a directory name 'win_amd64_cgo_test.exe' program D:\win_amd64_cgo_test>win_amd64_cgo_test.exe ---> To run it, the result is ok Invoking c library... Hello World>>>>>>> Done 13 D:\win_amd64_cgo_test>Attachments:
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