Update ci.yml

Author: OkonSamuel

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ on:
       - dev
     tags: '*'
 env:
-  TEST_MLJBASE: "true"
+
 jobs:
   test:
     name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
@@ -32,6 +32,27 @@ jobs:
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
+      - uses: actions/cache@v1
+      - name: "Replace julia libstdcxx ubuntu + julia v1.6"
+        if: ${{ matrix.version == '1.6' && matrix.os == 'ubuntu-latest' }}
+        # The following is needed for Julia <=1.8.3 on Linux OS 
+        # due to old version of libstcxx used by Julia
+        # taken from https://github.com/hhaensel/ReplaceLibstdcxx.jl/blob/main/src/ReplaceLibstdcxx.jl
+      - run: |
+              julia -e '
+                libs = filter(x -> ! occursin("32", x), getindex.(split.(readlines(pipeline(`ldconfig -p`, `grep libstdc`)), r"\s*=>\s*"), 2))
+                source_dir = dirname(libs[end])
+                julia_lib_dir = joinpath(dirname(Sys.BINDIR), "lib", "julia")
+                julia_lib_file = get(filter(endswith(r"libstdc\+\+.so\.\d+\.\d+\.\d+"), readdir(julia_lib_dir, join = true)), 1, nothing)
+                julia_lib_version = match(r"so(\.\d+)\.", julia_lib_file).captures[1]
+                source_lib = get(filter(endswith(r"libstdc\+\+.so\.\d+\.\d+\.\d+"), readdir(source_dir, join = true)), 1, nothing)
+                julia_lib = joinpath(dirname(Sys.BINDIR), "lib", "julia", "libstdc++.so")
+                for src in [julia_lib, julia_lib * julia_lib_version]
+                  islink(src) && rm(src, force = true)
+                  symlink(source_lib, src)
+                  @info read(`ls -al $src`, String)
+                end
+                '
       - uses: actions/cache@v1
         env:
           cache-name: cache-artifacts
@@ -122,4 +143,4 @@ jobs:
             end'
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}
+          DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}