Same problems after upgrading to Big Sur, error occurs even when trying to build the simplest helloworld. Typing brew config, the following informations are given: Clang: 12.0.5 build 1205 macOS: 11.5.1-x86_64 CLT: 12.5.1.0.1.1623191612 Xcode: N/A

Same problems after upgrading to Big Sur, error occurs even when trying to build the simplest helloworld. Typing brew config, the following informations are given: HOMEBREW_VERSION: 3.2.0-59-g196ec61 ORIGIN: https://github.com/Homebrew/brew.git HEAD: 196ec61a3a9c6ce8bb8cdc75b489b0163ebed53f Last commit: 6 weeks ago Core tap ORIGIN: https://mirrors.ustc.edu.cn/homebrew-core.git Core tap HEAD: a268bedb0a2689974bf687ffc7c927d08bf3fde5 Core tap last commit: 4 months ago Core tap branch: master HOMEBREW_PREFIX: /usr/local HOMEBREW_BOTTLE_DOMAIN: https://mirrors.ustc.edu.cn/homebrew-bottles HOMEBREW_CASK_OPTS: [] HOMEBREW_DISPLAY: /private/tmp/com.apple.launchd.27T7PBiKpd/org.xquartz:0 HOMEBREW_MAKE_JOBS: 4 Homebrew Ruby: 2.6.3 => /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby CPU: quad-core 64-bit broadwell Clang: 12.0.5 build 1205 Git: 2.31.1 => /usr/local/bin/git Curl: 7.64.1 => /usr/bin/curl macOS: 11.5.1-x86_64 CLT: 12.5.1.0.1.1623191612 Xcode: N/A