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@dannynash
Created February 10, 2018 07:49
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go build issue with adtac/commento

Linux

commento 有使用到 go-sqlite3,在 linux 上需要 gcc 編譯。

下載 gcc

$ sudo apt-get install gcc

下載 dep & 編譯 & 執行

$ go get -v github.com/adtac/commento
$ go build 
$ ./commento

Mac

編譯時發現問題,透過 -x 參數可以看 log

$ go build -x 

最後在 link 階段會卡住,但沒有錯誤訊息

cd .
/usr/local/Cellar/go/1.9.4/libexec/pkg/tool/darwin_amd64/link -o $WORK/github.com/dannynash/commento/_obj/exe/a.out -L $WORK -L /Users/dannynash/go/pkg/darwin_amd64 -extld=clang -buildmode=exe -buildid=3b14eb01013b91fd1a0748e95295ba759af668c4 $WORK/github.com/dannynash/commento.a

檢查 $WORK/github.com/dannynash/commento.a 存在,猜測是 link 參數錯誤,導致沒辦法編出 a.out。

但手動跑這行指令就編譯出來了... 超級詭異

附上環境參數

go env

GOARCH="amd64"
GOBIN="/Users/dannynash/go/bin"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/dannynash/go"
GORACE=""
GOROOT="/usr/local/Cellar/go/1.9.4/libexec"
GOTOOLDIR="/usr/local/Cellar/go/1.9.4/libexec/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/5r/1lwf83tn11bdjn2ffnrkdxnm0000gn/T/go-build648059657=/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"

gcc -v

Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/usr/include/c++/4.2.1
Apple LLVM version 9.0.0 (clang-900.0.39.2)
Target: x86_64-apple-darwin16.7.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

備註: 編譯 go-sqlite3 時間很長,可以用 go install 生成 bin。之後再 go build 時就不會花時間再編譯一次。

@dannynash
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更改 platform 檢查是不是跟 build tool 有關係

GOOS=linux GOARCH=amd64 go build 反而可以成功編譯出來,

嘗試更換 gcc

有看到討論串說用比較高版本的 gcc 編譯就可以解決這個問題,但還是沒成功

https://golang.org/doc/install
目前 mac 上的 gcc 是用 xcode clang,

嘗試用 gcc7

$ CC="gcc" go build -x -ldflags '-v -linkmode external'

還是遇到一樣的問題

@dannynash
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後來移除用 brew 安裝的 go,改到官方以 dmg 安裝就可以

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