[gdb] Fix build breaker with gcc 4.8
authorTom de Vries <tdevries@suse.de>
Wed, 19 Jun 2019 14:56:23 +0000 (16:56 +0200)
committerTom de Vries <tdevries@suse.de>
Wed, 19 Jun 2019 14:56:23 +0000 (16:56 +0200)
commitf23f598e28ad39dac7ae87cdc400d2f6b27dc403
tree165982abd499ac693d17328fd8293f5a01f3e569
parent899277ae529c2b743d22093fcc1a9e46aff4422a
[gdb] Fix build breaker with gcc 4.8

When compiling with gcc 4.8, we run into:
...
/usr/include/c++/4.8/bits/unordered_map.h:100:18: required from \
  ‘class std::unordered_map<sect_offset, std::vector<sect_offset> >’
src/gdb/dwarf2read.h:260:5:   required from here
/usr/include/c++/4.8/bits/hashtable_policy.h:1070:12: error: invalid use of \
  incomplete type ‘struct std::hash<sect_offset>’
...

Fix this by setting the Hash template parameter of the unordered_map to
gdb::hash_enum<sect_offset>, rather than using the default
std::hash<sect_offset>.

Build and reg-tested on x86_64-linux with gcc 4.8.

gdb/ChangeLog:

2019-06-19  Tom de Vries  <tdevries@suse.de>

* dwarf2read.h (abstract_to_concrete): Change type to
std::unordered_map<sect_offset, std::vector<sect_offset>,
gdb::hash_enum<sect_offset>>.
gdb/ChangeLog
gdb/dwarf2read.h