Workaround for TLS issue on FreeBSD

Author: bjorn3

.cirrus.yml

@@ -16,5 +16,8 @@ task:
     # Disabling incr comp reduces cache size and incr comp doesn't save as much
     # on CI anyway.
     - export CARGO_BUILD_INCREMENTAL=false
+    # FIXME(rust-lang/rust#134863) necessary to avoid error when dlopening proc
+    # macros during compilation of cg_clif.
+    - export LD_STATIC_TLS_EXTRA=4096
     # Skip rand as it fails on FreeBSD due to rust-random/rand#1355
     - ./y.sh test --skip-test test.rust-random/rand