Compiling without gcc

[cez81]

• Gitea version (or commit ref): b8e45b1
• Git version: 2.7.4
• Operating system: Ubuntu 16.04
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • Not relevant
• Log gist: N/A

Description

It should be possible to compile without gcc when building without sqlite support. Currently

jonas@be40f2203672:~/go/src/code.gitea.io/gitea# go build main.go
# code.gitea.io/gitea/vendor/github.com/mattn/go-sqlite3
exec: "gcc": executable file not found in $PATH

Related to: Issue #2172 and PR #2177