Cross Compile on Linux

Hi,

cross compile on linux does not work out of the box with node-gyp in backend. If I run @electron/rebuild -a arm64 on a amd64 system, the output will be still a amd64 binary.

If I define

export CC=aarch64-linux-gnu-gcc CXX=aarch64-linux-gnu-g++

Before running the rebuild command, it works find.

However, in a multi-arch build this is not possible. Running electron-builder with —x64 —amd64 would call rebuild twice.

It should be considered if electron-builder could set the CC variables, if host and target arch does not match.

No file or test is named. Start by tracing how @electron/rebuild handles the target architecture and how electron-builder invokes rebuild for multiple architectures, then inspect where node-gyp compiler variables are read. Done means Linux cross-compilation selects the target compiler without manually exporting CC and CXX.

Written by the indexing model from the issue text.