cmake: prefer system libraries

8 files changed, 163 insertions, 42 deletions

diff --git a/externals/CMakeLists.txt b/externals/CMakeLists.txt
index d25626ccc..8bb321e35 100644
--- a/externals/CMakeLists.txt
+++ b/externals/CMakeLists.txt
@@ -6,15 +6,16 @@ list(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/externals/find-modules")
 include(DownloadExternals)
 
 # xbyak
-if (ARCHITECTURE_x86 OR ARCHITECTURE_x86_64)
+if ((ARCHITECTURE_x86 OR ARCHITECTURE_x86_64) AND NOT TARGET xbyak::xbyak)
     add_subdirectory(xbyak EXCLUDE_FROM_ALL)
 endif()
 
 # Dynarmic
-if (ARCHITECTURE_x86_64 OR ARCHITECTURE_arm64)
+if ((ARCHITECTURE_x86_64 OR ARCHITECTURE_arm64) AND NOT TARGET dynarmic::dynarmic)
     set(DYNARMIC_NO_BUNDLED_FMT ON)
     set(DYNARMIC_IGNORE_ASSERTS ON CACHE BOOL "" FORCE)
-    add_subdirectory(dynarmic)
+    add_subdirectory(dynarmic EXCLUDE_FROM_ALL)
+    add_library(dynarmic::dynarmic ALIAS dynarmic)
 endif()
 
 # getopt
@@ -26,7 +27,9 @@ endif()
 add_subdirectory(glad)
 
 # inih
-add_subdirectory(inih)
+if (NOT TARGET inih::INIReader)
+    add_subdirectory(inih)
+endif()
 
 # mbedtls
 add_subdirectory(mbedtls EXCLUDE_FROM_ALL)
@@ -73,25 +76,30 @@ if (YUZU_USE_EXTERNAL_SDL2)
 endif()
 
 # ENet
-add_subdirectory(enet)
-target_include_directories(enet INTERFACE ./enet/include)
+if (NOT TARGET enet::enet)
+    add_subdirectory(enet EXCLUDE_FROM_ALL)
+    target_include_directories(enet INTERFACE ./enet/include)
+    add_library(enet::enet ALIAS enet)
+endif()
 
 # Cubeb
-if(ENABLE_CUBEB)
+if (ENABLE_CUBEB AND NOT TARGET cubeb::cubeb)
     set(BUILD_TESTS OFF CACHE BOOL "")
     add_subdirectory(cubeb EXCLUDE_FROM_ALL)
+    add_library(cubeb::cubeb ALIAS cubeb)
 endif()
 
 # DiscordRPC
-if (USE_DISCORD_PRESENCE)
+if (USE_DISCORD_PRESENCE AND NOT TARGET DiscordRPC::discord-rpc)
     add_subdirectory(discord-rpc EXCLUDE_FROM_ALL)
     target_include_directories(discord-rpc INTERFACE ./discord-rpc/include)
+    add_library(DiscordRPC::discord-rpc ALIAS discord-rpc)
 endif()
 
 # Sirit
-add_subdirectory(sirit)
+add_subdirectory(sirit EXCLUDE_FROM_ALL)
 
-if (ENABLE_WEB_SERVICE)
+if (ENABLE_WEB_SERVICE AND NOT TARGET httplib::httplib)
     if (NOT WIN32)
         find_package(OpenSSL 1.1)
         if (OPENSSL_FOUND)
@@ -119,18 +127,20 @@ if (ENABLE_WEB_SERVICE)
     if (WIN32)
         target_link_libraries(httplib INTERFACE crypt32 cryptui ws2_32)
     endif()
-	
-    # cpp-jwt
+    add_library(httplib::httplib ALIAS httplib)
+endif()
+
+# cpp-jwt
+if (ENABLE_WEB_SERVICE AND NOT TARGET cpp-jwt::cpp-jwt)
     add_library(cpp-jwt INTERFACE)
     target_include_directories(cpp-jwt INTERFACE ./cpp-jwt/include)
     target_compile_definitions(cpp-jwt INTERFACE CPP_JWT_USE_VENDORED_NLOHMANN_JSON)
+    add_library(cpp-jwt::cpp-jwt ALIAS cpp-jwt)
 endif()
 
 # Opus
-if (YUZU_USE_BUNDLED_OPUS)
+if (NOT TARGET Opus::opus)
     add_subdirectory(opus EXCLUDE_FROM_ALL)
-else()
-    find_package(Opus 1.3 REQUIRED)
 endif()
 
 # FFMpeg
@@ -141,3 +151,8 @@ if (YUZU_USE_BUNDLED_FFMPEG)
     set(FFmpeg_LIBRARIES "${FFmpeg_LIBRARIES}" PARENT_SCOPE)
     set(FFmpeg_INCLUDE_DIR "${FFmpeg_INCLUDE_DIR}" PARENT_SCOPE)
 endif()
+
+# Vulkan-Headers
+if (NOT TARGET Vulkan::Headers)
+    add_subdirectory(Vulkan-Headers EXCLUDE_FROM_ALL)
+endif()
diff --git a/externals/find-modules/FindDiscordRPC.cmake b/externals/find-modules/FindDiscordRPC.cmake
new file mode 100644
index 000000000..44ca9904f
--- /dev/null
+++ b/externals/find-modules/FindDiscordRPC.cmake
@@ -0,0 +1,27 @@
+# SPDX-FileCopyrightText: 2022 Alexandre Bouvier <[email protected]>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+find_path(DiscordRPC_INCLUDE_DIR discord_rpc.h)
+
+find_library(DiscordRPC_LIBRARY discord-rpc)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(DiscordRPC
+    REQUIRED_VARS
+        DiscordRPC_LIBRARY
+        DiscordRPC_INCLUDE_DIR
+)
+
+if (DiscordRPC_FOUND AND NOT TARGET DiscordRPC::discord-rpc)
+    add_library(DiscordRPC::discord-rpc UNKNOWN IMPORTED)
+    set_target_properties(DiscordRPC::discord-rpc PROPERTIES
+        IMPORTED_LOCATION "${DiscordRPC_LIBRARY}"
+        INTERFACE_INCLUDE_DIRECTORIES "${DiscordRPC_INCLUDE_DIR}"
+    )
+endif()
+
+mark_as_advanced(
+    DiscordRPC_INCLUDE_DIR
+    DiscordRPC_LIBRARY
+)
diff --git a/externals/find-modules/Findenet.cmake b/externals/find-modules/Findenet.cmake
new file mode 100644
index 000000000..663a2592f
--- /dev/null
+++ b/externals/find-modules/Findenet.cmake
@@ -0,0 +1,17 @@
+# SPDX-FileCopyrightText: 2022 Alexandre Bouvier <[email protected]>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+find_package(PkgConfig QUIET)
+if (PKG_CONFIG_FOUND)
+    pkg_search_module(ENET QUIET IMPORTED_TARGET GLOBAL libenet)
+    if (ENET_FOUND)
+        add_library(enet::enet ALIAS PkgConfig::ENET)
+    endif()
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(enet
+    REQUIRED_VARS ENET_LINK_LIBRARIES
+    VERSION_VAR ENET_VERSION
+)
diff --git a/externals/find-modules/Findhttplib.cmake b/externals/find-modules/Findhttplib.cmake
new file mode 100644
index 000000000..56e92a637
--- /dev/null
+++ b/externals/find-modules/Findhttplib.cmake
@@ -0,0 +1,22 @@
+# SPDX-FileCopyrightText: 2022 Andrea Pappacoda <[email protected]>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+include(FindPackageHandleStandardArgs)
+
+find_package(httplib QUIET CONFIG)
+if (httplib_FOUND)
+    find_package_handle_standard_args(httplib CONFIG_MODE)
+else()
+    find_package(PkgConfig QUIET)
+    if (PKG_CONFIG_FOUND)
+        pkg_search_module(HTTPLIB QUIET IMPORTED_TARGET GLOBAL cpp-httplib)
+        if (HTTPLIB_FOUND)
+            add_library(httplib::httplib ALIAS PkgConfig::HTTPLIB)
+        endif()
+    endif()
+    find_package_handle_standard_args(httplib
+        REQUIRED_VARS HTTPLIB_INCLUDEDIR
+        VERSION_VAR HTTPLIB_VERSION
+    )
+endif()
diff --git a/externals/find-modules/Findinih.cmake b/externals/find-modules/Findinih.cmake
new file mode 100644
index 000000000..844396471
--- /dev/null
+++ b/externals/find-modules/Findinih.cmake
@@ -0,0 +1,17 @@
+# SPDX-FileCopyrightText: 2022 Alexandre Bouvier <[email protected]>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+find_package(PkgConfig QUIET)
+if (PKG_CONFIG_FOUND)
+    pkg_search_module(INIREADER QUIET IMPORTED_TARGET GLOBAL INIReader)
+    if (INIREADER_FOUND)
+        add_library(inih::INIReader ALIAS PkgConfig::INIREADER)
+    endif()
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(inih
+    REQUIRED_VARS INIREADER_LINK_LIBRARIES
+    VERSION_VAR INIREADER_VERSION
+)
diff --git a/externals/find-modules/Findlz4.cmake b/externals/find-modules/Findlz4.cmake
index 13ca5de66..a928c4307 100644
--- a/externals/find-modules/Findlz4.cmake
+++ b/externals/find-modules/Findlz4.cmake
@@ -1,19 +1,30 @@
 # SPDX-FileCopyrightText: 2022 yuzu Emulator Project
 # SPDX-License-Identifier: GPL-2.0-or-later
 
-find_package(PkgConfig)
+include(FindPackageHandleStandardArgs)
 
-if (PKG_CONFIG_FOUND)
-    pkg_search_module(liblz4 IMPORTED_TARGET GLOBAL liblz4)
-    if (liblz4_FOUND)
-        add_library(lz4::lz4 ALIAS PkgConfig::liblz4)
+find_package(lz4 QUIET CONFIG)
+if (lz4_FOUND)
+    find_package_handle_standard_args(lz4 CONFIG_MODE)
+    if (NOT TARGET lz4::lz4)
+        if (TARGET LZ4::lz4_shared)
+            set_target_properties(LZ4::lz4_shared PROPERTIES IMPORTED_GLOBAL TRUE)
+            add_library(lz4::lz4 ALIAS LZ4::lz4_shared)
+        else()
+            set_target_properties(LZ4::lz4_static PROPERTIES IMPORTED_GLOBAL TRUE)
+            add_library(lz4::lz4 ALIAS LZ4::lz4_static)
+        endif()
+    endif()
+else()
+    find_package(PkgConfig QUIET)
+    if (PKG_CONFIG_FOUND)
+        pkg_search_module(liblz4 QUIET IMPORTED_TARGET GLOBAL liblz4)
+        if (liblz4_FOUND)
+            add_library(lz4::lz4 ALIAS PkgConfig::liblz4)
+        endif()
     endif()
+    find_package_handle_standard_args(lz4
+        REQUIRED_VARS liblz4_LINK_LIBRARIES
+        VERSION_VAR liblz4_VERSION
+    )
 endif()
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(lz4
-    REQUIRED_VARS
-        liblz4_LINK_LIBRARIES
-        liblz4_FOUND
-    VERSION_VAR liblz4_VERSION
-)
diff --git a/externals/find-modules/Findzstd.cmake b/externals/find-modules/Findzstd.cmake
index f4031eb70..1c29f3598 100644
--- a/externals/find-modules/Findzstd.cmake
+++ b/externals/find-modules/Findzstd.cmake
@@ -1,19 +1,30 @@
 # SPDX-FileCopyrightText: 2022 yuzu Emulator Project
 # SPDX-License-Identifier: GPL-2.0-or-later
 
-find_package(PkgConfig)
+include(FindPackageHandleStandardArgs)
 
-if (PKG_CONFIG_FOUND)
-    pkg_search_module(libzstd IMPORTED_TARGET GLOBAL libzstd)
-    if (libzstd_FOUND)
-        add_library(zstd::zstd ALIAS PkgConfig::libzstd)
+find_package(zstd QUIET CONFIG)
+if (zstd_FOUND)
+    find_package_handle_standard_args(zstd CONFIG_MODE)
+    if (NOT TARGET zstd::zstd)
+        if (TARGET zstd::libzstd_shared)
+            set_target_properties(zstd::libzstd_shared PROPERTIES IMPORTED_GLOBAL TRUE)
+            add_library(zstd::zstd ALIAS zstd::libzstd_shared)
+        else()
+            set_target_properties(zstd::libzstd_static PROPERTIES IMPORTED_GLOBAL TRUE)
+            add_library(zstd::zstd ALIAS zstd::libzstd_static)
+        endif()
+    endif()
+else()
+    find_package(PkgConfig QUIET)
+    if (PKG_CONFIG_FOUND)
+        pkg_search_module(libzstd QUIET IMPORTED_TARGET GLOBAL libzstd)
+        if (libzstd_FOUND)
+            add_library(zstd::zstd ALIAS PkgConfig::libzstd)
+        endif()
     endif()
+    find_package_handle_standard_args(zstd
+        REQUIRED_VARS libzstd_LINK_LIBRARIES
+        VERSION_VAR libzstd_VERSION
+    )
 endif()
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(zstd
-    REQUIRED_VARS
-        libzstd_LINK_LIBRARIES
-        libzstd_FOUND
-    VERSION_VAR libzstd_VERSION
-)
diff --git a/externals/inih/CMakeLists.txt b/externals/inih/CMakeLists.txt
index b686e3cf5..ebb60a976 100644
--- a/externals/inih/CMakeLists.txt
+++ b/externals/inih/CMakeLists.txt
@@ -9,4 +9,5 @@ add_library(inih
 )
 
 create_target_directory_groups(inih)
-target_include_directories(inih INTERFACE .)
+target_include_directories(inih INTERFACE inih/cpp)
+add_library(inih::INIReader ALIAS inih)