cmake: allow USE_ICONV on any Unix
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 42cc169..229ba96 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -66,9 +66,7 @@ IF (UNIX)
ENDIF()
OPTION(ENABLE_REPRODUCIBLE_BUILDS "Enable reproducible builds" OFF)
-ENDIF()
-IF (APPLE)
OPTION(USE_ICONV "Link with and use iconv library" ON)
ENDIF()