它可以生成能够调用 C 语言代码的 Go 语言源文件,也就是说所有启用了 CGO 特性的 Go 代码,都会首先经过 cgo 的"预处理"。 对test2.go,cgo 工具会在同目录生成以下文件 _obj--| |--_cgo.o // C代码编译出的链接库 |--_cgo_main.c // C代码部分的main函数 |--_cgo_flags // C代码的编译和链接...
with different patterns in order to specify different arguments for different sets of packages. If a package matches patterns given in multiple flags, the latest match on the command line wins. For example, 'go build -gcflags=-S fmt' prints the disassembly only for package fmt, while 'go bu...
//go:linkname _cgo_runtime_cgocall runtime.cgocall func _cgo_runtime_cgocall(unsafe.Pointer, uintptr) int32 //go:linkname _cgo_runtime_cgocallback runtime.cgocallback func _cgo_runtime_cgocallback(unsafe.Pointer, unsafe.Pointer, uintptr, uintptr) //go:linkname _cgoCheckPointer runtime...
为了更好地理解和演示Cgo的使用,下面是一个更复杂的示例代码,演示了如何在Golang中调用一个C++类的方法: packagemain//#cgo CXXFLAGS: -std=c++11//#cgo LDFLAGS: -lstdc++//#include "example.h"import"C"typeExamplestruct{ptr*C.example_t}funcNewExample()*Example{example:=&Example{}example.ptr=C....
golang 是默认开启 cgo 工具的,可执行 go env 命令查看 go env GO111MODULE="on"GOARCH="amd64"GOBIN=""GOCACHE="/root/.cache/go-build"GOENV="/root/.config/go/env"GOEXE=""GOEXPERIMENT=""GOFLAGS=""GOHOSTARCH="amd64"GOHOSTOS="linux"GOINSECURE=""GOMODCACHE="/root/go/pkg/mod"GONOPR...
cgoCallersUse uint32 // if non-zero, cgoCallers in use temporarily cgoCallers *cgoCallers // cgo traceback if crashing in cgo call park note alllink *m // on allm schedlink muintptr mcache *mcache lockedg *g // 表示与当前M锁定那个g ...
cgo 的时候遇到一个奇怪的东西, c 的 struct 里面字段都正常, 但是 cgo 仅仅拿到第一个字段,后面直接下划线给屏蔽了,这是为什么,看了下也没什么关键字啊 c struct: typedef struct _NF_IP_PACKET_OPTIONS { unsigned short ip_family; unsigned int ipHeaderSize; ...
Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build746511617=/tmp/go-build -gno-record-gcc-switches -fno-common"CXX="clang++"CGO_ENABLED="1"CGO_CFLAGS="-g -O2"CGO_CPPFLAGS=""CGO_CXXFLAGS="-g -O2"CGO_FFLAGS="-g -O2"CGO_LDFLAGS="-g -O2"PKG_CONFIG="pkg-config...
CGO_LDFLAGS="-g -O2" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build2113898159=/tmp/go-build -gno-record-gcc-switches" ...
CGO_FFLAGS="-O2 -g" CGO_LDFLAGS="-O2 -g" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build2384001255=/tmp/go-build -gno-record-gcc-switches"