Include

I'm currently working with a third party library, which has headers declared using angular brackets, like a standard library :

#include <header.h>

However, these headers are installed in a non standard place, something like /opt/company/software/version/part_software/include

With a more traditional builder like MAKE, I can just use CXXFLAGS to indicate to g++ to look in this folder too for libraries, which finally comes down to pass a -I/opt/company/software/version/part_software/include option to g++.

When trying to do the same thing in bazel, using copts = [ "-I/opt/company/software/version/part_software/include" ], I get a "path outside of the execution root" error.

It's my understanding that bazel don't like the place where the lib is installed because the build needs to be reproducible, and including a library located outside the execution root violate this constraint.

A ugly hack I've come with is to create symbolic link of the headers in /usr/local/include, and use copts = [ "-I/usr/local/include" ] in the bazel build. However, I find this approach very hacky, and I'd like to find a more bazely approach to the problem.

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Note : I can't install the program during the bazel build, as it uses a closed installer on which I have no control over. This installer can't be run in the bazel's sandboxed environment, as it needs to write on certain paths not accessible within the environment.