cmake: require at least libavif 1.0

CMakeLists.txt

@@ -113,7 +113,7 @@ option(SDL3IMAGE_XV "Support loading XV images" ON)
 cmake_dependent_option(SDL3IMAGE_JPG_SAVE "Add JPEG save support" ON SDL3IMAGE_JPG OFF)
 cmake_dependent_option(SDL3IMAGE_PNG_SAVE "Add PNG save support" ON SDL3IMAGE_PNG OFF)
 
-set(LIBAVIF_MINIMUM_VERSION "0.9.3")
+set(LIBAVIF_MINIMUM_VERSION "1.0")
 if(SDL3IMAGE_VENDORED AND SDL3IMAGE_AVIF)
     set(SDL3IMAGE_AVIF_VENDORED ON)
 else()
@@ -445,15 +445,12 @@ if(SDL3IMAGE_AVIF)
           endif()
         endif()
     else()
-        find_package(libavif 1.0 QUIET)
-        if(NOT libavif_FOUND)
-            find_package(libavif ${LIBAVIF_MINIMUM_VERSION} QUIET)
-        endif()
+        find_package(libavif "${LIBAVIF_MINIMUM_VERSION}" QUIET ${required})
         if(libavif_FOUND)
             message(STATUS "${PROJECT_NAME}: Using system libavif")
             set(SDL3IMAGE_AVIF_ENABLED TRUE)
             if(NOT SDL3IMAGE_AVIF_SHARED)
-              list(APPEND PC_REQUIRES libavif)
+                list(APPEND PC_REQUIRES "libavif >= ${LIBAVIF_MINIMUM_VERSION}")
             endif()
         else()
             message(STATUS "libavif-${LIBAVIF_MINIMUM_VERSION} or compatible not found")