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GO環境でcould not import Cエラー

Last updated at Posted at 2020-11-23

エラー発生

Goのgraphqlライブラリのgqlgenでスキーマを更新しようとしたら謎のエラー

/go/src # go run github.com/99designs/gqlgen
validation failed: packages.Load: /usr/local/go/src/net/cgo_linux.go:12:8: could not import C (no metadata for C)
exit status 1

解決

どうやらgccがdockerイメージ上に入ってない模様。
たぶんきっとこれ? https://github.com/golangci/golangci-lint/issues/602

apk updateしてapkをアップデートした後、alpine-sdkというビルドパッケージ?を入れたらうまく行きました。
apkについては、この記事が分かりやすかったです。

/go/src # apk update
fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/main/x86_64/APKINDEX.tar.gz

fetch http://dl-cdn.alpinelinux.org/alpine/v3.12/community/x86_64/APKINDEX.tar.gz
v3.12.1-44-g754f23ac8f [http://dl-cdn.alpinelinux.org/alpine/v3.12/main]
v3.12.1-41-g42f619918d [http://dl-cdn.alpinelinux.org/alpine/v3.12/community]
OK: 12746 distinct packages available
/go/src # apk add alpine-sdk
(1/37) Upgrading musl (1.1.24-r9 -> 1.1.24-r10)
  0%                                                                                                                                                                                                                   
(2/37) Installing fakeroot (1.24-r0)
(3/37) Installing openssl (1.1.1g-r0)
(4/37) Installing libattr (2.4.48-r0)
(5/37) Installing attr (2.4.48-r0)
(6/37) Installing libacl (2.2.53-r0)
(7/37) Installing tar (1.32-r1)
(8/37) Installing pkgconf (1.7.2-r0)
(9/37) Installing patch (2.7.6-r6)
(10/37) Installing libgcc (9.3.0-r2)
(11/37) Installing libstdc++ (9.3.0-r2)
(12/37) Installing lzip (1.21-r0)
(13/37) Installing nghttp2-libs (1.41.0-r0)
(14/37) Installing libcurl (7.69.1-r1)
(15/37) Installing curl (7.69.1-r1)
(16/37) Installing abuild (3.6.0-r1)
Executing abuild-3.6.0-r1.pre-install
(17/37) Installing binutils (2.34-r1)
(18/37) Installing libmagic (5.38-r0)
(19/37) Installing file (5.38-r0)
(20/37) Installing gmp (6.2.0-r0)
(21/37) Installing isl (0.18-r0)
(22/37) Installing libgomp (9.3.0-r2)
(23/37) Installing libatomic (9.3.0-r2)
(24/37) Installing libgphobos (9.3.0-r2)
(25/37) Installing mpfr4 (4.0.2-r4)
(26/37) Installing mpc1 (1.1.0-r1)
(27/37) Installing gcc (9.3.0-r2)
(28/37) Installing musl-dev (1.1.24-r10)
(29/37) Installing libc-dev (0.7.2-r3)
(30/37) Installing g++ (9.3.0-r2)
(31/37) Installing make (4.3-r0)
(32/37) Installing fortify-headers (1.1-r0)
(33/37) Installing build-base (0.5-r2)
(34/37) Installing expat (2.2.9-r1)
(35/37) Installing pcre2 (10.35-r0)
(36/37) Installing git (2.26.2-r0)
(37/37) Installing alpine-sdk (1.0-r0)
Executing busybox-1.31.1-r19.trigger
OK: 224 MiB in 51 packages

ひとりごと

使っているdockerイメージgolang:1.15.5-alpine3.12がいけなかったのか。。
詳しい方教えてください>_<

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