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authorJim Blandy <jimb@codesourcery.com>2002-11-06 20:57:41 +0000
committerJim Blandy <jimb@codesourcery.com>2002-11-06 20:57:41 +0000
commitf8302a575394d045db014d182246a66e0e404d44 (patch)
tree8e61e4bfcab19686343ba91bee1c73e76e7ce0c5 /gdb/macrotab.h
parentc9e3887989960034fd89d176f72d7e14d5bc3d79 (diff)
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* macrotab.h (struct macro_source_file): Doc fix.
Diffstat (limited to 'gdb/macrotab.h')
-rw-r--r--gdb/macrotab.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/gdb/macrotab.h b/gdb/macrotab.h
index df32977..bd44e2c 100644
--- a/gdb/macrotab.h
+++ b/gdb/macrotab.h
@@ -83,6 +83,15 @@ struct macro_table;
tree mapping the #inclusions that contributed to the compilation
unit, with the main source file as its root.
+ Beware --- not every source file mentioned in a compilation unit's
+ symtab structures will appear in the #inclusion tree! As of Oct
+ 2002, GCC does record the effect of #line directives in the source
+ line info, but not in macro info. This means that GDB's symtabs
+ (built from the former, among other things) may mention filenames
+ that the #inclusion tree (built from the latter) doesn't have any
+ record of. See macroscope.c:sal_macro_scope for how to accomodate
+ this.
+
It's worth noting that libcpp has a simpler way of representing all
this, which we should consider switching to. It might even be
suitable for ordinary non-macro line number info.