Use separate fmt dependency

Instead of the library that may be bundled with spdlog, because spdlog may be distributed without a bundled fmt (e.g. in Arch Linux's repositories).

This also changes both fmt and spdlog to be built as static libraries instead of used as header-only libraries, as that's the recommended approach.

CMakeLists.txt

@@ -154,6 +154,12 @@ else()
     set(LCI_LIBRARIES ${LCI_LIBRARIES} dl)
 endif()
 
+FetchContent_Declare(
+    fmt
+    URL "https://github.com/fmtlib/fmt/archive/refs/tags/11.0.2.tar.gz"
+    FIND_PACKAGE_ARGS)
+
+set(SPDLOG_FMT_EXTERNAL ON)
 FetchContent_Declare(
     spdlog
     URL "https://github.com/gabime/spdlog/archive/v1.14.1.tar.gz"
@@ -173,7 +179,15 @@ FetchContent_Declare(
     URL_HASH "SHA256=e91779044cd4025ec10ed31986031031ef22ebce90a64cc8f85e7c7e95a1abc6"
     FIND_PACKAGE_ARGS)
 
-FetchContent_MakeAvailable(spdlog yaml-cpp)
+# Set BUILD_SHARED_LIBS=OFF to prevent fmt and spdlog from being built as shared
+# libraries.
+set(LIBLOOT_BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS})
+set(BUILD_SHARED_LIBS OFF)
+
+FetchContent_MakeAvailable(fmt spdlog yaml-cpp)
+
+# Restore the original value of BUILD_SHARED_LIBS.
+set(BUILD_SHARED_LIBS ${LIBLOOT_BUILD_SHARED_LIBS})
 
 ##############################
 # General Settings
@@ -301,7 +315,8 @@ target_link_libraries(loot PRIVATE
     ${ESPLUGIN_LIBRARIES}
     ${LIBLOADORDER_LIBRARIES}
     ${LCI_LIBRARIES}
-    spdlog::spdlog_header_only
+    fmt::fmt
+    spdlog::spdlog
     yaml-cpp::yaml-cpp)
 
 ##############################

cmake/tests.cmake

@@ -117,7 +117,8 @@ target_link_libraries(libloot_internals_tests PRIVATE
     ${ESPLUGIN_LIBRARIES}
     ${LIBLOADORDER_LIBRARIES}
     ${LCI_LIBRARIES}
-    spdlog::spdlog_header_only
+    fmt::fmt
+    spdlog::spdlog
     yaml-cpp::yaml-cpp
     GTest::gtest_main)
 

src/api/bsa.cpp

@@ -24,6 +24,7 @@
 
 #include "api/bsa.h"
 
+#include <array>
 #include <boost/algorithm/string.hpp>
 #include <fstream>
 

src/api/helpers/crc.cpp

@@ -24,8 +24,9 @@
 
 #include "api/helpers/crc.h"
 
-#include <spdlog/fmt/fmt.h>
+#include <fmt/base.h>
 
+#include <array>
 #include <boost/crc.hpp>
 #include <fstream>
 

src/api/metadata/yaml/message.h

@@ -26,8 +26,7 @@
 
 #define YAML_CPP_SUPPORT_MERGE_KEYS
 
-#include <spdlog/fmt/bundled/args.h>
-#include <spdlog/fmt/fmt.h>
+#include <fmt/args.h>
 #include <yaml-cpp/yaml.h>
 
 #include <string>

src/api/sorting/plugin_graph.h

@@ -25,10 +25,6 @@
 #ifndef LOOT_API_SORTING_PLUGIN_SORTER
 #define LOOT_API_SORTING_PLUGIN_SORTER
 
-#define FMT_NO_FMT_STRING_ALIAS
-
-#include <spdlog/spdlog.h>
-
 #include <boost/graph/adjacency_list.hpp>
 #include <boost/graph/graph_traits.hpp>
 #include <map>