add '-shared-libasan' to debug flags (bug #5533)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5d244f7..5757388 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2312,20 +2312,22 @@
   endif()
 endif()
 
-macro(asan_check_add_debug_flag ASAN_FLAG)
-    set(FLAG "-fsanitize=${ASAN_FLAG}")
-
-    check_c_compiler_flag(${FLAG} HAS_C_FLAG_${ASAN_FLAG})
-    if (HAS_C_FLAG_${ASAN_FLAG})
+macro(check_add_debug_flag FLAG SUFFIX)
+    check_c_compiler_flag(${FLAG} HAS_C_FLAG_${SUFFIX})
+    if (HAS_C_FLAG_${SUFFIX})
         set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${FLAG}")
     endif()
 
-    check_cxx_compiler_flag("${FLAG}" HAS_CXX_${ASAN_FLAG})
-    if (HAS_CXX_${ASAN_FLAG})
+    check_cxx_compiler_flag(${FLAG} HAS_CXX_${SUFFIX})
+    if (HAS_CXX_${SUFFIX})
         set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${FLAG}")
     endif()
 endmacro()
 
+macro(asan_check_add_debug_flag ASAN_FLAG)
+    check_add_debug_flag("-fsanitize=${ASAN_FLAG}" "${ASAN_FLAG}")
+endmacro()
+
 macro(asan_check_add_debug_flag2 ASAN_FLAG)
     # for some sanitize flags we have to manipulate the CMAKE_REQUIRED_LIBRARIES:
     # http://cmake.3232098.n2.nabble.com/CHECK-CXX-COMPILER-FLAG-doesn-t-give-correct-result-for-fsanitize-address-tp7600216p7600217.html
@@ -2348,6 +2350,7 @@
 endmacro()
 
 # enable AddressSanitizer if supported
+check_add_debug_flag("-shared-libasan" "shared_libasan")
 asan_check_add_debug_flag2("address")
 asan_check_add_debug_flag("bool")
 asan_check_add_debug_flag("bounds")