【解决了一个小问题】macbook m2 下交叉编译 musl-gcc 支持的 gozstd 库

作者:张富春(ahfuzhang)，转载时请注明作者和引用链接，谢谢！

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我的 golang 项目中使用了 gozstd， 在 macbook m2 下编译当然没有问题。
可是当交叉编译 linux amd64 的二进制时，遇到了问题。

使用 gnu-gcc 是 ok 的

env CC=x86_64-linux-gnu-gcc CGO_ENABLED=1  GOOS=linux  GOARCH=amd64 CGO_LDFLAGS="-static" \
	  go build -o cmd/server_linux_amd cmd/main.go

使用 musl-gcc 报错

env CC=x86_64-linux-musl-gcc CGO_ENABLED=1  GOOS=linux  GOARCH=amd64 CGO_LDFLAGS="-static" \
	  go build -o cmd/server_linux_amd cmd/main.go

出现类似这样的错误：

/opt/homebrew/Cellar/go/1.20.4/libexec/pkg/tool/darwin_arm64/link: running x86_64-linux-musl-gcc failed: exit status 1
/opt/homebrew/Cellar/musl-cross/0.9.9_1/libexec/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /Users/fuchunzhang/go/pkg/mod/github.com/valyala/[email protected]/libzstd_linux_amd64.a(zdict.o): in function `ZDICT_analyzeEntropy':
zdict.c:(.text+0x7d4): undefined reference to `__fprintf_chk'
/opt/homebrew/Cellar/musl-cross/0.9.9_1/libexec/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: zdict.c:(.text+0xd21): undefined reference to `__fprintf_chk'
/opt/homebrew/Cellar/musl-cross/0.9.9_1/libexec/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /Users/fuchunzhang/go/pkg/mod/github.com/valyala/[email protected]/libzstd_linux_amd64.a(zdict.o): in function `ZDICT_analyzePos':
zdict.c:(.text+0x1922): undefined reference to `__fprintf_chk'
/opt/homebrew/Cellar/musl-cross/0.9.9_1/libexec/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: zdict.c:(.text+0x19b2): undefined reference to `__fprintf_chk'
/opt/homebrew/Cellar/musl-cross/0.9.9_1/libexec/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /Users/fuchunzhang/go/pkg/mod/github.com/valyala/[email protected]/libzstd_linux_amd64.a(zdict.o): in function `ZDICT_finalizeDictionary':
zdict.c:(.text+0x1cf3): undefined reference to `__fprintf_chk'
/opt/homebrew/Cellar/musl-cross/0.9.9_1/libexec/bin/../lib/gcc/x86_64-linux-musl/9.2.0/../../../../x86_64-linux-musl/bin/ld: /Users/fuchunzhang/go/pkg/mod/github.com/valyala/[email protected]/libzstd_linux_amd64.a(zdict.o):zdict.c:(.text+0x20b5): more undefined references to `__fprintf_chk' follow
collect2: error: ld returned 1 exit status

解决办法

最后搜索到作者的 github，帖子里介绍了解决办法：https://github.com/valyala/gozstd/issues/20
最终用这样的命令行解决了：

env CC=x86_64-linux-musl-gcc CGO_ENABLED=1  GOOS=linux  GOARCH=amd64 CGO_LDFLAGS="-static" \
	  go build -tags 'musl' -o cmd/server_linux_amd cmd/main.go