CMake: Ensure libunicode's version is correct at configure time

Signed-off-by: Christian Parpart <[email protected]>

Author: christianparpart

cmake/ContourThirdParties.cmake

@@ -125,12 +125,17 @@ else()
     set(THIRDPARTY_BUILTIN_freetype "system package")
 endif()
 
-find_package(libunicode QUIET)
-if(libunicode_FOUND)
-    set(THIRDPARTY_BUILTIN_unicode_core "system package (${libunicode_VERSION})")
-else()
+set(LIBUNICODE_MINIMAL_VERSION "0.4.0")
+if(COMMAND ContourThirdParties_Embed_libunicode)
     ContourThirdParties_Embed_libunicode()
+    subproject_version(libunicode libunicode_version)
+    if(NOT DEFINED libunicode_version OR libunicode_version VERSION_LESS LIBUNICODE_MINIMAL_VERSION)
+        message(FATAL_ERROR "Embedded libunicode version must be at least ${LIBUNICODE_MINIMAL_VERSION}, but found ${libunicode_version}")
+    endif()
     set(THIRDPARTY_BUILTIN_unicode_core "embedded")
+else()
+    find_package(libunicode ${LIBUNICODE_MINIMAL_VERSION} REQUIRED)
+    set(THIRDPARTY_BUILTIN_unicode_core "system package (${libunicode_VERSION})")
 endif()
 
 if(LIBTERMINAL_BUILD_BENCH_HEADLESS)