[PATCH v2 dwarves 4/5] man-pages: document true_signature btf_feature

Ensure non-default "true_signature" feature is documented in
the manual page.

Signed-off-by: Alan Maguire <[email protected]>
---
 man-pages/pahole.1 | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/man-pages/pahole.1 b/man-pages/pahole.1
index 3125de3..90a8f45 100644
--- a/man-pages/pahole.1
+++ b/man-pages/pahole.1
@@ -337,6 +337,11 @@ Supported non-standard features (not enabled for 'default')
 	                   of split BTF with a possibly changed base, storing
 	                   it in a .BTF.base ELF section.
 	global_var         Encode all global variables using BTF_KIND_VAR in BTF.
+	true_signature     Encode functions ensuring that binary-level
+	                   (rather than source-level) signatures are used;
+                           for gcc these are ".isra.0" and ".costprop.0"
+                           optimized functions
+
 .fi
 
 So for example, specifying \-\-btf_encode=var,enum64 will result in a BTF encoding that (as well as encoding basic BTF information) will contain variables and enum64 values.
-- 
2.43.5