CMake: don't check for --no-undefined linker flag for OpenBSD (bug #5174) it now matches autotools.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8772447..e0a01ca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -528,7 +528,7 @@ if(USE_GCC OR USE_CLANG)
list(APPEND EXTRA_LDFLAGS "-Wl,-undefined,error")
list(APPEND EXTRA_LDFLAGS "-Wl,-compatibility_version,${DYLIB_COMPATIBILITY_VERSION}")
list(APPEND EXTRA_LDFLAGS "-Wl,-current_version,${DYLIB_CURRENT_VERSION}")
- else()
+ elseif(NOT OPENBSD)
set(CMAKE_REQUIRED_FLAGS "-Wl,--no-undefined")
check_c_compiler_flag("" HAVE_NO_UNDEFINED)
set(CMAKE_REQUIRED_FLAGS ${ORIG_CMAKE_REQUIRED_FLAGS})