error: expected unqualified-id before &' token

[dancingmirrors]

I'm trying to build on FreeBSD and am hitting this:

[ 49%] Building CXX object CMakeFiles/libloot_internals_tests.dir/src/api/api.cpp.o
In file included from /home/xxx/src/libloot/src/api/metadata/yaml/plugin_metadata.h:40,
                 from /home/xxx/src/libloot/src/api/api_database.cpp:32:
/home/xxx/src/libloot/src/api/metadata/yaml/message.h: In static member function 'static bool YAML::convert<loot::Message>::decode(const YAML::Node&, loot::Message&)':
/home/xxx/src/libloot/src/api/metadata/yaml/message.h:144:41: error: expected unqualified-id before  &' token
  144 |         } catch (const fmt::format_error& e) {
      |                                         ^
/home/xxx/src/libloot/src/api/metadata/yaml/message.h:144:41: error: expected ')' before '&' token
/home/xxx/src/libloot/src/api/metadata/yaml/message.h:144:17: note: to match this '('
  144 |         } catch (const fmt::format_error& e) {
      |                 ^
/home/xxx/src/libloot/src/api/metadata/yaml/message.h:144:41: error: expected '{' before '&' token
  144 |         } catch (const fmt::format_error& e) {
      |                                         ^
/home/xxx/src/libloot/src/api/metadata/yaml/message.h:144:43: error: 'e' was not declared in this scope
  144 |         } catch (const fmt::format_error& e) {
      |                                           ^

I also tried with -DCMAKE_DISABLE_FIND_PACKAGE_yaml-cpp=ON, clang 18.1.6, and GCC 13.

[Ortham]

My guess is that there's a missing include, try adding #include <fmt/format.h> to the top of yaml/message.h.

[dancingmirrors]

Thank you! That fixed the error. The build almost completes now, still investigating.

[dancingmirrors]

For some reason my installed fmt doesn't have base.h.