Fails to build (cannot convert ‘const string’ to ‘const char*’)

[wmww]

On up to date Arch, I cloned, meson build and ninja -C build and got this.

wmww:Waybar$ ninja -C build
ninja: Entering directory `build'
[4/32] Compiling C++ object waybar.p/src_config.cpp.o
FAILED: waybar.p/src_config.cpp.o 
c++ -Iwaybar.p -I. -I.. -I../include -I../subprojects/spdlog-1.8.5/include -I../subprojects/date-3.0.0/include -Iprotocol -I/usr/include/sigc++-2.0 -I/usr/lib/sigc++-2.0/include -I/usr/include/gtkmm-3.0 -I/usr/lib/gtkmm-3.0/include -I/usr/include/giomm-2.4 -I/usr/lib/giomm-2.4/include -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/glibmm-2.4 -I/usr/lib/glibmm-2.4/include -I/usr/include/gtk-3.0 -I/usr/include/pango-1.0 -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/fribidi -I/usr/include/cairo -I/usr/include/lzo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/gio-unix-2.0 -I/usr/include/cloudproviders -I/usr/include/atk-1.0 -I/usr/include/at-spi2-atk/2.0 -I/usr/include/dbus-1.0 -I/usr/lib/dbus-1.0/include -I/usr/include/at-spi-2.0 -I/usr/include/cairomm-1.0 -I/usr/lib/cairomm-1.0/include -I/usr/include/pangomm-1.4 -I/usr/lib/pangomm-1.4/include -I/usr/include/atkmm-1.6 -I/usr/lib/atkmm-1.6/include -I/usr/include/gtk-3.0/unix-print -I/usr/include/gdkmm-3.0 -I/usr/lib/gdkmm-3.0/include -I/usr/include/libdbusmenu-gtk3-0.4 -I/usr/include/libdbusmenu-glib-0.4 -I/usr/include/libnl3 -I/usr/include/libevdev-1.0/ -I/usr/include/gtk-layer-shell -I/usr/include/libxml2 -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wnon-virtual-dtor -std=c++17 -O3 '-DVERSION="0.9.8-70-gb511103 (branch '"'"'master'"'"')"' -DHAVE_LANGINFO_1STDAY '-DSYSCONFDIR="//usr/local/etc"' -DHAVE_CPU_LINUX -DHAVE_MEMORY_LINUX -DHAVE_SWAY -DHAVE_WLR -DHAVE_RIVER -DHAVE_LIBNL -DHAVE_LIBPULSE -DHAVE_DBUSMENU -DHAVE_LIBUDEV -DHAVE_LIBEVDEV -DHAVE_GTK_LAYER_SHELL -DHAVE_LIBDATE -DUSE_OS_TZDB=1 -pthread -D_REENTRANT -DSPDLOG_FMT_EXTERNAL -MD -MQ waybar.p/src_config.cpp.o -MF waybar.p/src_config.cpp.o.d -o waybar.p/src_config.cpp.o -c ../src/config.cpp
In file included from ../subprojects/spdlog-1.8.5/include/spdlog/common.h:248,
                 from ../subprojects/spdlog-1.8.5/include/spdlog/spdlog.h:12,
                 from ../src/config.cpp:4:
../subprojects/spdlog-1.8.5/include/spdlog/common-inl.h: In constructor ‘spdlog::spdlog_ex::spdlog_ex(const string&, int)’:
../subprojects/spdlog-1.8.5/include/spdlog/common-inl.h:63:50: error: cannot convert ‘const string’ {aka ‘const std::__cxx11::basic_string<char>’} to ‘const char*’
   63 |     fmt::format_system_error(outbuf, last_errno, msg);
      |                                                  ^~~
      |                                                  |
      |                                                  const string {aka const std::__cxx11::basic_string<char>}
In file included from /usr/include/fmt/ostream.h:13,
                 from ../src/config.cpp:3:
/usr/include/fmt/format.h:2265:46: note:   initializing argument 3 of ‘void fmt::v8::format_system_error(fmt::v8::detail::buffer<char>&, int, const char*)’
 2265 |                                  const char* message) FMT_NOEXCEPT;
      |                                  ~~~~~~~~~~~~^~~~~~~

<it continues on with warnings, but the only other errors are repeats of this one>

[alebastr]

../subprojects/spdlog-1.8.5 - that is an old version of spdlog that is not compatible with the current fmt. You'll need to either install both from the Arch repos or use both as subprojects.

[wmww]

Thanks! Installing spdlog from the Arch repos fixed it.