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-rw-r--r--boehm-gc/doc/README.macros5
1 files changed, 5 insertions, 0 deletions
diff --git a/boehm-gc/doc/README.macros b/boehm-gc/doc/README.macros
index b5fe6796cc2..df0ef2cda93 100644
--- a/boehm-gc/doc/README.macros
+++ b/boehm-gc/doc/README.macros
@@ -85,5 +85,10 @@ SRC_M3 Set if the collector is being built as a replacement of the
It's there primarily incase someone wants to port to a similar
system.
+USE_COMPILER_TLS Assume the existence of __thread-style thread-local
+ storage. Set automatically for thread-local allocation with
+ the HP/UX vendor compiler. Usable with gcc on sufficiently
+ up-to-date ELF platforms.
+