From bad10342bd8cb55b4c727c6f20857c3dd2605efe Mon Sep 17 00:00:00 2001
From: Rafael Kitover <rkitover@gmail.com>
Date: Sat, 2 Aug 2025 06:20:37 +0000
Subject: [PATCH] build: use pkg-config on UNIX for SDL3

Signed-off-by: Rafael Kitover <rkitover@gmail.com>
---
 CMakeLists.txt           |  1 +
 cmake/Dependencies.cmake | 14 +++++++++-----
 cmake/Options.cmake      | 24 +++++++++++++++---------
 3 files changed, 25 insertions(+), 14 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 212b6045..f4127af3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,7 @@ cmake_policy(VERSION 3.19...3.28.3)
 # Use new link library de-duplication behavior.
 cmake_policy(SET CMP0156 NEW)
 cmake_policy(SET CMP0179 NEW)
+cmake_policy(SET CMP0181 NEW)
 
 set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake)
 
diff --git a/cmake/Dependencies.cmake b/cmake/Dependencies.cmake
index e8e44c94..a721dc75 100644
--- a/cmake/Dependencies.cmake
+++ b/cmake/Dependencies.cmake
@@ -48,16 +48,20 @@ if((NOT ENABLE_SDL3) AND CMAKE_TOOLCHAIN_FILE MATCHES "vcpkg")
 endif()
 
 if(ENABLE_SDL3)
-    if(VBAM_STATIC)
-       set(VBAM_SDL_LIBS SDL3::SDL3-static ${SDL_LIBRARY_TEMP})
+    if(UNIX)
+        set(VBAM_SDL_LIBS "${SDL3_LIBRARIES}")
     else()
-       set(VBAM_SDL_LIBS SDL3::SDL3        ${SDL_LIBRARY_TEMP})
+        if(VBAM_STATIC)
+            set(VBAM_SDL_LIBS SDL3::SDL3-static ${SDL_LIBRARY_TEMP})
+        else()
+            set(VBAM_SDL_LIBS SDL3::SDL3        ${SDL_LIBRARY_TEMP})
+        endif()
     endif()
 else()
     if(VBAM_STATIC)
-       set(VBAM_SDL_LIBS SDL2::SDL2-static ${SDL_LIBRARY_TEMP})
+        set(VBAM_SDL_LIBS SDL2::SDL2-static ${SDL_LIBRARY_TEMP})
     else()
-       set(VBAM_SDL_LIBS SDL2::SDL2        ${SDL_LIBRARY_TEMP})
+        set(VBAM_SDL_LIBS SDL2::SDL2        ${SDL_LIBRARY_TEMP})
     endif()
 endif()
 
diff --git a/cmake/Options.cmake b/cmake/Options.cmake
index 10cce55b..8f013988 100644
--- a/cmake/Options.cmake
+++ b/cmake/Options.cmake
@@ -40,15 +40,27 @@ if(VBAM_STATIC)
     endif()
 endif()
 
-find_package(SDL3 QUIET)
+if(CMAKE_TOOLCHAIN_FILE MATCHES "vcpkg" AND CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "^([xX]86_64|[aA][mM][dD]64)$")
+   set(PKG_CONFIG_EXECUTABLE "$ENV{VCPKG_ROOT}/installed/x64-windows/tools/pkgconf/pkgconf.exe")
+endif()
+
+find_package(PkgConfig)
+
+if(UNIX)
+    pkg_check_modules(SDL3 sdl3 QUIET)
+else()
+    find_package(SDL3 QUIET)
+endif()
 
 option(ENABLE_SDL3 "Use SDL3" "${SDL3_FOUND}")
 
 if(NOT TRANSLATIONS_ONLY)
     if(ENABLE_SDL3)
-        find_package(SDL3 CONFIG REQUIRED)
+        if(NOT UNIX)
+            find_package(SDL3 REQUIRED)
+        endif()
     else()
-        find_package(SDL2 CONFIG REQUIRED)
+        find_package(SDL2 REQUIRED)
     endif()
 endif()
 
@@ -93,12 +105,6 @@ if(APPLE AND NOT DISABLE_MACOS_PACKAGE_MANAGERS)
     include(MacPackageManagers)
 endif()
 
-if(CMAKE_TOOLCHAIN_FILE MATCHES "vcpkg" AND CMAKE_HOST_SYSTEM_PROCESSOR MATCHES "^([xX]86_64|[aA][mM][dD]64)$")
-   set(PKG_CONFIG_EXECUTABLE "$ENV{VCPKG_ROOT}/installed/x64-windows/tools/pkgconf/pkgconf.exe")
-endif()
-
-find_package(PkgConfig)
-
 # Link / SFML
 if(NOT TRANSLATIONS_ONLY)
     set(ENABLE_LINK_DEFAULT ON)