Hi!
Without this patch, we emit in .debug_macro with -g3 -xc -
a .file N "" directive which makes e.g. readelf unhappy.
Elsewhere, we handle "" filename as "<stdin>", so this patch does that too
for .debug_macro.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2019-11-27 Jakub Jelinek <ja...@redhat.com>
PR debug/92664
* dwarf2out.c (lookup_filename): Use "<stdin>" instead of "".
--- gcc/dwarf2out.c.jj 2019-10-17 08:44:08.594363833 +0200
+++ gcc/dwarf2out.c 2019-11-26 12:35:46.419184285 +0100
@@ -27118,6 +27118,9 @@ lookup_filename (const char *file_name)
if (!file_name)
return NULL;
+ if (!file_name[0])
+ file_name = "<stdin>";
+
dwarf_file_data **slot
= file_table->find_slot_with_hash (file_name, htab_hash_string (file_name),
INSERT);
Jakub
