CMake: Move definitions of externals to the CMakeLists in that directory

externals/CMakeLists.txt

@@ -1,16 +1,52 @@
+# Definitions for all external bundled libraries
+
 # Catch
 add_library(catch-single-include INTERFACE)
 target_include_directories(catch-single-include INTERFACE catch/single_include)
 
+# Crypto++
+add_subdirectory(cryptopp)
+
+# Dynarmic
+# Dynarmic will skip defining xbyak if it's already defined, we then define it below
+add_library(xbyak INTERFACE)
+option(DYNARMIC_TESTS OFF)
+set(DYNARMIC_NO_BUNDLED_FMT ON)
+add_subdirectory(dynarmic)
+
+# libfmt
+add_subdirectory(fmt)
+
+# getopt
+if (MSVC)
+    add_subdirectory(getopt)
+endif()
+
+# Glad
+add_subdirectory(glad)
+
+# inih
+add_subdirectory(inih)
+
+# MicroProfile
+add_library(microprofile INTERFACE)
+target_include_directories(microprofile INTERFACE ./microprofile)
+
+# Nihstro
+add_library(nihstro-headers INTERFACE)
+target_include_directories(nihstro-headers INTERFACE ./nihstro/include)
+
+# SoundTouch
+add_subdirectory(soundtouch)
+# The SoundTouch target doesn't export the necessary include paths as properties by default
+target_include_directories(SoundTouch INTERFACE ./soundtouch/include)
+
 # Xbyak
 if (ARCHITECTURE_x86_64)
-    add_library(xbyak INTERFACE)
-    target_include_directories(xbyak INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}/xbyak/xbyak)
+    # Defined before "dynarmic" above
+    # add_library(xbyak INTERFACE)
+    target_include_directories(xbyak INTERFACE ./xbyak/xbyak)
     if (NOT MSVC)
         target_compile_options(xbyak INTERFACE -fno-operator-names)
     endif()
 endif()
-
-add_subdirectory(cryptopp)
-
-add_subdirectory(fmt)