How to disable extremely long PATH when running tests?

[ilg-ul]

I'm running tests with Cortex-M binaries via qemu-system-arm, and the tests pass, but I see a very long PATH in the invocation line. Below it the meson output, split into several groups:

>>> MALLOC_PERTURB_=0 PATH='
# ???
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/bin/../libexec/gcc/arm-none-eabi/10.3.1:
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/libexec/gcc:
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/libexec/gcc/arm-none-eabi/10.3.1:
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/arm-none-eabi/lib:
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/bin/../libexec/gcc:
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/bin/../lib/gcc/arm-none-eabi/10.3.1/../../../../arm-none-eabi/bin:
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/bin/../lib/gcc/arm-none-eabi/10.3.1:
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/bin/../lib/gcc/arm-none-eabi/10.3.1/../../../../arm-none-eabi/lib:
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/lib/gcc/arm-none-eabi/10.3.1:
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/lib/gcc:
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/bin/../arm-none-eabi/lib:
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/bin/../lib/gcc:
/Users/ilg/Library/xPacks/@xpack-dev-tools/arm-none-eabi-gcc/10.3.1-2.3.1/.content/arm-none-eabi/bin:

# Contributed by xpm
/Users/ilg/My Files/WKS Projects/micro-os-plus.github/xPacks/micro-test-plus-xpack.git/build/qemu-mps2-an386-meson-debug/xpacks/.bin:
/Users/ilg/My Files/WKS Projects/micro-os-plus.github/xPacks/micro-test-plus-xpack.git/xpacks/.bin:

# System
/Users/ilg/.local/texlive/bin/universal-darwin:
/Users/ilg/.nvm/versions/node/v14.16.0/bin:
/usr/local/bin:
/usr/bin:
/bin:
/usr/sbin:
/sbin' 
'/Users/ilg/My Files/WKS Projects/micro-os-plus.github/xPacks/micro-test-plus-xpack.git/build/qemu-mps2-an386-meson-debug/xpacks/.bin/qemu-system-arm' --machine mps2-an386 -d unimp,guest_errors --nographic --kernel meson-out/sample-test.elf --semihosting-config enable=on,target=native,arg=unit-test,arg=one,arg=two

As far as I can tell, my build environment adds only the two xpacks/.bin folders.

Is meson adding the other folders? If so, is there any option to disable this behaviour?

[eli-schwartz]

Those directories are bizarre and should only be added on Windows, which is needed because on Windows there is no such thing as an rpath and the only way to find dependency DLLs is to add their directories to PATH. In this case, DLLs that came from the compiler toolchain itself.

[ilg-ul]

I'm running the builds and tests on macOS.

And my toolchains are standalone and use RPATH; for Windows the DLLs are copied into the folders where the executables are, so those paths really are not necessary.

[ilg-ul]

You can see yourself such a case at the end of the run in the Ubuntu 20 container:

• https://github.com/micro-os-plus/diag-trace-xpack/runs/5167376929