Add a reference to Clang /usr/include/tgmath.h dependency

The fake Clang /usr/include/tgmath.h dependency bug is:

https://github.com/llvm/llvm-project/issues/120891

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Sam James <sam@gentoo.org>

diff --git a/Makerules b/Makerules
index c8b54f7d9a6ead7739b31d72dabbfc1b78e0a40e..b60b7e2315964bdb4f532ebd0f0e2fef2510fecf 100644 (file)
--- a/Makerules
+++ b/Makerules
@@ -471,6 +471,7 @@ ifneq (,$(objpfx))
 # Continuation lines here are dangerous because they introduce spaces!
 # Also remove the /usr/include/tgmath.h dependency generated by Clang
 # even though Clang never reads /usr/include/tgmath.h.
+# https://github.com/llvm/llvm-project/issues/120891
 define sed-remove-objpfx
 -e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \
 -e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g' \