Removed "undefined" argument for Apple platforms. This is incompatible with enabling bitcode, such as with iOS builds. The default value for "undefined" is "error" so this option should be redundant.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 954c77a..15a6cbf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -695,7 +695,6 @@ if(USE_GCC OR USE_CLANG)
cmake_pop_check_state()
# FIXME: use generator expression instead of appending to EXTRA_LDFLAGS_BUILD
- list(APPEND EXTRA_LDFLAGS_BUILD "-Wl,-undefined,error")
list(APPEND EXTRA_LDFLAGS_BUILD "-Wl,-compatibility_version,${DYLIB_COMPATIBILITY_VERSION}")
list(APPEND EXTRA_LDFLAGS_BUILD "-Wl,-current_version,${DYLIB_CURRENT_VERSION}")
elseif(NOT OPENBSD)