Set the HAVE_MEMORY_SANITIZER and HAVE_ADDRESS_SANITIZER cache entries.

These were (inconsistently) not being set as opposed to
HAVE_THREAD_SANITIZER and HAVE_UNDEFINED_BEHAVIOUR_SANITIZER

FindASan.cmake

@@ -21,6 +21,13 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 #
+# This module tests if address sanitizer is supported by the compiler,
+# and creates a ASan build type (i.e. set CMAKE_BUILD_TYPE=ASan to use
+# it). This sets the following variables:
+#
+# CMAKE_C_FLAGS_ASAN - Flags to use for C with asan
+# CMAKE_CXX_FLAGS_ASAN  - Flags to use for C++ with asan
+# HAVE_ADDRESS_SANITIZER - True or false if the ASan build type is available
 
 include(CheckCCompilerFlag)
 
@@ -43,8 +50,12 @@ endif()
 
 if(NOT ADDRESS_SANITIZER_FLAG)
   return()
+else(NOT ADDRESS_SANITIZER_FLAG)
+  set(HAVE_ADDRESS_SANITIZER FALSE)
 endif()
 
+set(HAVE_ADDRESS_SANITIZER TRUE)
+
 set(CMAKE_C_FLAGS_ASAN "-O1 -g ${ADDRESS_SANITIZER_FLAG} -fno-omit-frame-pointer -fno-optimize-sibling-calls"
     CACHE STRING "Flags used by the C compiler during ASan builds."
     FORCE)

FindMSan.cmake

@@ -26,7 +26,7 @@
 # and creates a MSan build type (i.e. set CMAKE_BUILD_TYPE=MSan to use
 # it). This sets the following variables:
 #
-# CMAKE_C_FLAGS_MSAN - Flags to use for C with tsan
+# CMAKE_C_FLAGS_MSAN - Flags to use for C with msan
 # CMAKE_CXX_FLAGS_MSAN  - Flags to use for C++ with msan
 # HAVE_MEMORY_SANITIZER - True or false if the MSan build type is available
 
@@ -51,8 +51,11 @@ endif()
 
 if(NOT MEMORY_SANITIZER_FLAG)
   return()
+else(NOT MEMORY_SANITIZER_FLAG)
+  set(HAVE_MEMORY_SANITIZER TRUE)
 endif()
 
+set(HAVE_MEMORY_SANITIZER TRUE)
 
 set(CMAKE_C_FLAGS_MSAN "-O1 -g ${MEMORY_SANITIZER_FLAG} -fno-omit-frame-pointer -fno-optimize-sibling-calls"
     CACHE STRING "Flags used by the C compiler during MSan builds."