Go | Docker | Build static binary using musl C library

[atc0005]

Modified Makefile build command (using spaces here vs required tabs in the actual Makefile):

BUILDCMD = go build -mod=vendor -tags 'osusergo,netgo,sqlite_omit_load_extension' -a -ldflags "-extldflags '-static' -s -w -X $(VERSION_VAR_PKG).version=$(VERSION)"

This is for a cgo-enabled project which uses the https://github.com/mattn/go-sqlite3 package.

$ docker run --rm -it -v $PWD:$PWD -w $PWD --rm i386/golang:alpine3.12 /bin/sh
# apk update
# apk add make bash util-linux nano git gcc musl-dev file
# make all && rm release_assets/*/*.sha256 && file release_assets/*/*

This allowed building both x86 and x64 binaries, whereas if I tried to use the standard golang:alpine3.12 container I was unable to cross-compile both x86 and x64 binaries.

This is all from an Ubuntu 18.04 LTS VM with Docker CE installed.

[atc0005]

For building a project that uses the mattn/go-sqlite3 package, I found that I needed to use mingw-w64 to build the Windows binaries. This required installation of the mingw-w64-gcc package to obtain these binaries:

• i686-w64-mingw32
• x86_64-w64-mingw32-gcc

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Worth noting:

• Not available in CentOS 7 via EPEL
  • https://unix.stackexchange.com/questions/327156/where-can-i-find-and-install-the-mingw-w64-packages-for-centos-7
  • https://bugzilla.redhat.com/show_bug.cgi?id=1807975
  • https://pagure.io/fesco/issue/2333
• Available in Ubuntu as gcc-mingw-w64

[atc0005]

See also:

• Makefile build options do not generate static binaries mysql2sqlite#48
• Makefile build options do not generate static binaries check-mail#94
• Add images for building static, cgo-enabled projects go-ci#85