openblas not detected in non standard location

[cosminbasca]

Hi,

I am building and installing openblas with a custom toolchain into a custom rootfs. I set the PKG_CONFIG_PATH path to my /rootfs/lib/pkgconfig and pkg-config will find openblas when queried. However, when pip installing numpy (using the env var from before) meson will not detect openblas, even though /rootfs/lib/openblas.so is there and pkg-config can find it. It is as if the env var is ignored - but I am not sure this is the case. This is for numpy 2.2.3 built from source. Any help much appreciated. Thanks!

Cheers,
Cosmin