Add -rpath-link for transitive dependencies

Author: staticfloat

.buildkite/test_linux.yml

@@ -3,6 +3,7 @@ steps:
     plugins:
       - JuliaCI/julia#v1:
           version: "${JULIA_VERSION?}"
+          arch: "${ARCH?}"
       - staticfloat/sandbox#v1:
           rootfs_url: "${ROOTFS_URL?}"
           rootfs_treehash: "${ROOTFS_HASH?}"
@@ -13,7 +14,7 @@ steps:
       - staticfloat/metahook#sf/windows_backslashes:
           pre-command: |
             # Upgrade our debian package to bullseye (wowza)
-            if [[ $$(uname -m) == "x86_64" ]] || [[ $$(uname -m) == "aarch64" ]]; then
+            if [[ "${ARCH?}" == "x86_64" ]] || [[ "${ARCH?}" == "aarch64" ]]; then
               echo "deb http://deb.debian.org/debian bullseye main" > /etc/apt/sources.list.d/bullseye.list
               apt update && apt install -y libblas64-dev liblapack64-dev
             fi

test/runtests.jl

@@ -29,6 +29,11 @@ function run_test((test_name, test_expected_outputs, test_success), libblas_name
         append!(ldflags, ("-Wl,-rpath,$(pathesc(libdir))" for libdir in libdirs))
     end
 
+    if Sys.islinux()
+        # Linux needs this for transitive dependencies
+        append!(ldflags, ("-Wl,-rpath-link,$(pathesc(libdir))" for libdir in libdirs))
+    end
+
     mktempdir() do dir
         @info("Compiling `$(test_name)` against $(libblas_name) ($(backing_libs)) in $(dir)")
         srcdir = joinpath(@__DIR__, test_name)