docs/defines.txt: add a note about possibly obsolete __LDBL_COMPAT

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/docs/defines.txt b/docs/defines.txt
index 52d394a..2399181 100644 (file)
--- a/docs/defines.txt
+++ b/docs/defines.txt
@@ -69,3 +69,5 @@ __UCLIBC_HAS_XXX__, __UCLIBC_HAVE_XXX__
 
 _IEEE_LIBM
     Always defined at libm build time
+__LDBL_COMPAT
+    Never defined, TODO: remove?