update libstdcxx

Author: t-bltg

docs/ci_build.sh

@@ -57,16 +57,18 @@ $julia -e '
   using Conda; env, rc = Conda.ROOTENV, Conda.conda_rc(Conda.ROOTENV)
   Conda.runconda(`config --set auto_update_conda False --file $rc --force`, env)
   Pkg.add("PyCall"); Pkg.build("PyCall"; verbose=true)
-  # see discourse.julialang.org/t/glibcxx-version-not-found/82209/8
-  # julia 1.8.3 is built with libstdc++.so.6.0.29, so we must restrict to this version (gcc 11.3.0, not gcc 12.2.0)
-  libstdcxx_ver = Base.BinaryPlatforms.detect_libstdcxx_version()
-  gcc_ver = Dict(
-    v"3.4.29" => 11,
-    v"3.4.30" => 12,
-    # ... keep this up-to-date with gcc 13
-  )[libstdcxx_ver]
-  Conda.add("libgcc-ng<=$gcc_ver")
-  Conda.add("libstdcxx-ng<=$gcc_ver")
+  if Sys.islinux()
+    # see discourse.julialang.org/t/glibcxx-version-not-found/82209/8
+    # julia 1.8.3 is built with libstdc++.so.6.0.29, so we must restrict to this version (gcc 11.3.0, not gcc 12.2.0)
+    libstdcxx_ver = Base.BinaryPlatforms.detect_libstdcxx_version()
+    gcc_major = Dict(
+      v"3.4.29" => 11,
+      v"3.4.30" => 12,
+      # ... keep this up-to-date with gcc 13
+    )[libstdcxx_ver]
+    Conda.add("libgcc-ng=$gcc_major")
+    Conda.add("libstdcxx-ng=$gcc_major")
+  end
   Conda.add("matplotlib")
   Conda.list()
 '