• go 环境搭建 以及 linux 下go环境交叉编辑链(arm)的搭建,error: invalid conversion from 'void*' to 'unsigned char*' [-fpermissive]

    1,下载

    Golang官网下载地址：https://golang.google.cn/dl/

    2,解压到指定目录

    3,运行go 

    获取环境变量修改方法

    go help env
usage: go env [-json] [-u] [-w] [var ...]

Env prints Go environment information.

By default env prints information as a shell script
(on Windows, a batch file). If one or more variable
names is given as arguments, env prints the value of
each named variable on its own line.

The -json flag prints the environment in JSON format
instead of as a shell script.

The -u flag requires one or more arguments and unsets
the default setting for the named environment variables,
if one has been set with 'go env -w'.

The -w flag requires one or more arguments of the
form NAME=VALUE and changes the default settings
of the named environment variables to the given values.

For more about environment variables, see 'go help environment'.

    windows现在环境变量

    C:UsersAdministrator>go env
set GO111MODULE=on
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:UsersAdministratorAppDataLocalgo-build
set GOENV=C:UsersAdministratorAppDataRoaminggoenv
set GOEXE=.exe
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:Go
etworkpkg;
set GOPRIVATE=
set GOPROXY=https://goproxy.io,direct
set GOROOT=c:go
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLDIR=c:gopkg	oolwindows_amd64
set GCCGO=gccgo
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=NUL
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fmessage-length=0 -fdebug-prefix-map=C:UsersADMINI~1AppDataLocalTempgo-build644129466=/tmp/go-build -gno-record-gcc-switches

C:UsersAdministrator>

    linux 现在环境变量

    root@ubuntu:~# go env
GO111MODULE="on"
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/root/go"
GOPRIVATE=""
GOPROXY="https://goproxy.cn/"
GOROOT="/home/goenv/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/home/goenv/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/dev/null"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build869956040=/tmp/go-build -gno-record-gcc-switches"
root@ubuntu:~#

    　设置/etc/profile环境变量

    设置GOPATH环境变量

修改/etc/profile系统环境变量文件，写入GOPATH信息以及go sdk路径
#for go env

export GOROOT=/home/goenv/go
export PATH=$PATH:$GOROOT/bin

读取/etc/profile，立即生效

source /etc/profile     #读取环境变量

    　　

    　修改方法

    go env -w GOPROXY=https://goproxy.cn/
    go env -w GO111MODULE=on

    　　

    想在linux 同时设置 x64,x86的环境失败了.(当年是失败了,现在被b成功了.请看最下面说明 )

    GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"

    GOROOT="/home/goenv/go"
    会同时修改.只有用2台机器来配置环境变量

    安装mingw ,gcc

    安装mingw，想用g++gcc编译器。

网上很多教程都是指引下载安装器的，但是下载后在线安装时却都出现下载的错误，所以无法安装成功。

参考mingw贴吧：https://tieba.baidu.com/p/5487544851?red_tag=1967781305

可以到页面：https://sourceforge.net/projects/mingw-w64/files/?source=navbar 下载离线安装包

    go 交叉编译 arm 32 的程序

    由于项目原因,需要把go的程序编译成so,供C使用.无奈板子空间小,运行慢.

    被bi de 需要用交叉编译链,以前都没有弄对,这次整对了.

    #拷贝下面的话到linux中执行.
#指定gcc程序目录 
export PATH=$PATH:/opt/poky/1.7/sysroots/i686-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/


export PATH=$PATH:$GOROOT/bin
export GOPROXY="https://goproxy.io,direct"
export CGO_ENABLED=1
export GO111MODULE=on
export GOROOT=/home/goenv/go


# 这些是修改 编译架构,x86,x64 , gcc  ,gcc FLAGS
export GOARCH=arm
export GOHOSTARCH=386
export CGO_CFLAGS="-g -O2  "
export CGO_CPPFLAGS=" "
export CGO_CXXFLAGS="-g -O2  "
export CGO_FFLAGS="-g -O2  "
export CGO_LDFLAGS="-g -O2  "
export PKG_CONFIG="pkg-config"
export GOGCCFLAGS=" -fPIC -marm -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build964815022=/tmp/go-build -gno-record-gcc-switches"


export AR="arm-poky-linux-gnueabi-gcc-ar"
export CC="arm-poky-linux-gnueabi-gcc"
export CXX="arm-poky-linux-gnueabi-g++"
    #拷贝下面的话到linux中执行.
#指定gcc程序目录 
export PATH=$PATH:/opt/poky/1.7/sysroots/i686-pokysdk-linux/usr/bin/arm-poky-linux-gnueabi/


export PATH=$PATH:$GOROOT/bin
export GOPROXY="https://goproxy.io,direct"
export CGO_ENABLED=1
export GO111MODULE=on
export GOROOT=/home/goenv/go


# 这些是修改 编译架构,x86,x64 , gcc  ,gcc FLAGS
export GOARCH=arm
export GOHOSTARCH=386
export CGO_CFLAGS="-g -O2 -mfloat-abi=hard"
export CGO_CPPFLAGS="-mfloat-abi=hard"
export CGO_CXXFLAGS="-g -O2 -mfloat-abi=hard"
export CGO_FFLAGS="-g -O2 -mfloat-abi=hard"
export CGO_LDFLAGS="-g -O2 -mfloat-abi=hard"
export PKG_CONFIG="pkg-config"
export GOGCCFLAGS="-mfloat-abi=hard -fPIC -marm -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build964815022=/tmp/go-build -gno-record-gcc-switches"


export AR="arm-poky-linux-gnueabi-gcc-ar"
export CC="arm-poky-linux-gnueabi-gcc"
export CXX="arm-poky-linux-gnueabi-g++"

    export GOARCH=arm

    使用go build编译的程序即可在arm平台运行

    切换回linux平台

    export GOARCH=amd64

    然后执行自己需要的go编译命令就可以了

    go build -o /xxx.exe /run.go #生成exe

go build -ldflags xxxxxxxxx #生成so

    go 交叉编译 arm 64 的程序

    export PATH=$PATH:/home/armgcc/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu/bin/

export GOROOT=/home/go/
export PATH=$PATH:$GOROOT/bin
export GOPROXY="https://goproxy.io,direct"
export CGO_ENABLED=1
export GO111MODULE=on



# 这些是修改 编译架构,x86,x64 , gcc  ,gcc FLAGS  amd64 arm64
export GOOS=linux
export GOARCH=arm64
export GOHOSTARCH=arm64
export GOFLAGS=" "
export CGO_CFLAGS="-g -O2    "
export CGO_CPPFLAGS="       "
export CGO_CXXFLAGS="-g -O2     "
export CGO_FFLAGS="-g -O2     "
export CGO_LDFLAGS="-g -O2    "
export PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build504536815=/tmp/go-build -gno-record-gcc-switches"


export AR="aarch64-linux-gnu-gcc-ar"
export CC="aarch64-linux-gnu-gcc"
export CXX="aarch64-linux-gnu-g++"

    当时

    export CC="aarch64-linux-gnu-gcc" 写成了
    export CC="aarch64-linux-gnu-g++"
    导致编译出错
    error: invalid conversion from 'void*' to 'unsigned char*' [-fpermissive]
    其实是应该用gcc编译的用的g++  ,,,wo cao,cao
    我正在尝试用g ++编译一些c代码（是的，故意的）。我收到的错误就像（例如）：

error: invalid conversion from 'void*' to 'unsigned char*' [-fpermissive]
在编译选项中添加-fpermissive让我：

error: invalid conversion from 'void*' to 'unsigned char*' [-Werror=permissive]
由于-Werror似乎是错误，但是添加-Wno-error=permissive -Wno-permissive导致：

error: -Werror=permissive: no option -Wpermissive
error: unrecognized command line option "-Wno-permissive" [-Werror]
如何禁用从void *到其他指针类型的转换警告（全局）？
     
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  • 原文地址：https://www.cnblogs.com/bleachli/p/go_cross_compile_arm.html
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