Use statically linked spdlog over system spdlog/libfmt

meson.build

@@ -20,10 +20,16 @@ project(
 )
 
 usb_dep = dependency('libusb-1.0')
-log_dep = dependency('spdlog')
-fmt_dep = dependency('fmt')
 pangocairo_dep = dependency('pangocairo')
 
+# spdlog with std::format (C++20) - static library
+spdlog_proj = subproject('spdlog', default_options: ['std_format=enabled', 'default_library=static', 'compile_library=true'])
+log_dep = spdlog_proj.get_variable('spdlog_dep')
+
+if not log_dep.found()
+    error('spdlog not found, can not proceed')
+endif
+
 # CLI11
 cli11_proj = subproject('cli11')
 cli11_dep = cli11_proj.get_variable('CLI11_dep')
@@ -50,7 +56,7 @@ ptprnt_exe = executable(
     'ptprnt',
     'src/main.cpp',
     install: true,
-    dependencies: [usb_dep, log_dep, fmt_dep, pangocairo_dep, cli11_dep],
+    dependencies: [usb_dep, log_dep, pangocairo_dep, cli11_dep],
     include_directories: incdir,
     sources: [ptprnt_srcs],
     cpp_args: cpp_args,