Adding linker to the PATH

help
1

For compiling for Android, we need to generate linker, ad call it in the .cargo/config, I got the required linkers, saved them in the project root, and called them in the /.cargo/config as:

[target.x86_64-linux-android]
ar = "<project_root>/ndk_for_rust/x86_64/bin/x86_64-linux-android-ar"
linker = "<project_root>/ndk_for_rust/x86_64/bin/x86_64-linux-android-clang"

And everything moved smoothly.

Now i need to create another project, so to avoid having multiple copies of my ndk_for_rust folder, I added to the path $HOME/.bash_profile as:

export NDK_FOR_RUST_HOME=/usr/local/ndk_for_rust

And tried to call it in the .cargo/config as:

[target.x86_64-linux-android]
ar = "${NDK_FOR_RUST_HOME}/ndk_for_rust/x86_64/bin/x86_64-linux-android-ar"
linker = "${NDK_FOR_RUST_HOME}/ndk_for_rust/x86_64/bin/x86_64-linux-android-clang"

But got the below error upon running cargo build --target x86_64-linux-android --release:

error: linker `/Users/h_ajsf/IdeaProjects/rust_app02/${NDK_FOR_RUST_HOME}/x86_64/bin/x86_64-linux-android-clang` not found                                                                  
  |                                                                                                                                                                                            
  = note: No such file or directory (os error 2)

Is there a way to use a linker to a location outside my project root, so I avoid having multiple copies?

2

What I did was add the linker etc, to my path directly, so that the config file doesn't have to worry about environment variables

3

How did you call the linker from you config file? or do you mean you did not use config file?

4

Sorry for the late reply, when I originally replied, I wasn't at my pc. When I use WSL to run my android app, I use the following .cargo/conf and I actually have the linker and stuff in a separate place:

[target.x86_64-pc-windows-gnu]
linker = "/usr/bin/x86_64-w64-mingw32-gcc"

[target.i686-pc-windows-gnu]
linker = "/usr/bin/i686-w64-mingw32-gcc"
rustflags = "-C panic=abort"
5