Improve --sanitizers configure option

* Rename SANITIZERS CMake variable to ZEEK_SANITIZERS for clarity

* Use -O1 by default to improve speed (set NO_OPTIMIZATIONS env. var.
  to override and use -O0).  Uses -fno-optimize-sibling-calls with -O1
  to still get "perfect stack traces".

* Updates various sub-projects with sanitizer improvements:
  binpac and bifcl, by default, now ignore leaks reported by LeakSanitizer
  so that it doesn't interfere with the Zeek build

CMakeLists.txt

@@ -121,10 +121,30 @@ if ( NOT BINARY_PACKAGING_MODE )
     _make_install_dir_symlink("${CMAKE_INSTALL_PREFIX}/lib/bro" "${CMAKE_INSTALL_PREFIX}/lib/zeek")
 endif ()
 
-if ( SANITIZERS )
-    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=${SANITIZERS} -fno-omit-frame-pointer")
-    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=${SANITIZERS} -fno-omit-frame-pointer")
-    set(CMAKE_LD_FLAGS "${CMAKE_LD_FLAGS} -fsanitize=${SANITIZERS} -fno-omit-frame-pointer")
+if ( ZEEK_SANITIZERS )
+    # Check the thread library info early as setting compiler flags seems to
+    # interfere with the detection and cause CMAKE_THREAD_LIBS_INIT to not
+    # include -lpthread when it should.
+    find_package(Threads)
+    set(_sanitizer_flags "-fsanitize=${ZEEK_SANITIZERS}")
+    set(_sanitizer_flags "${_sanitizer_flags} -fno-omit-frame-pointer")
+    set(_sanitizer_flags "${_sanitizer_flags} -fno-optimize-sibling-calls")
+
+    if ( NOT DEFINED ENV{NO_OPTIMIZATIONS} )
+      # Using -O1 is generally the suggestion to get more reasonable
+      # performance.  The one downside is it that the compiler may optimize out
+      # code that otherwise generates an error/leak in a -O0 build, but that
+      # should be rare and users mostly will not be running unoptimized builds
+      # in production anyway.
+      set(_sanitizer_flags "${_sanitizer_flags} -O1")
+    endif ()
+
+    # Technically, the we also need to use the compiler to drive linking and
+    # give the sanitizer flags there, too.  However, CMake, by default, uses
+    # the compiler for linking and so the automatically flags get used.  See
+    # https://cmake.org/pipermail/cmake/2014-August/058268.html
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${_sanitizer_flags}")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${_sanitizer_flags}")
 endif()
 
 ########################################################################
@@ -205,6 +225,10 @@ if ( BROKER_ROOT_DIR )
   set(zeekdeps ${zeekdeps} ${BROKER_LIBRARY})
   set(broker_includes ${BROKER_INCLUDE_DIR})
 else ()
+  if ( ZEEK_SANITIZERS )
+    set(BROKER_SANITIZERS ${ZEEK_SANITIZERS})
+  endif ()
+
   set(ENABLE_STATIC_ONLY_SAVED ${ENABLE_STATIC_ONLY})
 
   if ( BUILD_STATIC_BROKER )

aux/bifcl

@@ -1 +1 @@
-Subproject commit e5b1940850d486e3989f6a55615140a16bd1b9d2
+Subproject commit 9cc1f0dfcd7c9d7c7a4031d45732268e0d68206f

aux/binpac

@@ -1 +1 @@
-Subproject commit c02d6ff7be6bcee097d668f4f667f83c82a28cc6
+Subproject commit 71f815a22027bef47fa46459a1010013bd4f59e3

aux/broker

@@ -1 +1 @@
-Subproject commit 237c3cd2d87d467a5b9ac0517c6461ac00c7b85c
+Subproject commit 5156ba056e1747b31466a29898564065d20d30a1

configure

@@ -27,6 +27,7 @@ Usage: $0 [OPTION]... [VAR=VALUE]...
                            ccache installation and CMake 3.10+)
     --toolchain=PATH       path to a CMAKE_TOOLCHAIN_FILE
                            (useful for cross-compiling)
+    --sanitizers=LIST      comma-separated list of sanitizer names to enable
 
   Installation Directories:
     --prefix=PREFIX        installation directory [/usr/local/zeek]
@@ -57,7 +58,6 @@ Usage: $0 [OPTION]... [VAR=VALUE]...
     --disable-auxtools     don't build or install auxiliary tools
     --disable-python       don't try to build python bindings for Broker
     --disable-broker-tests don't try to build Broker unit tests
-    --sanitizers=SANITIZERS comma-separated list of Clang sanitizers to enable
 
   Required Packages in Non-Standard Locations:
     --with-openssl=PATH    path to OpenSSL install root
@@ -154,7 +154,7 @@ append_cache_entry INSTALL_AUX_TOOLS    BOOL   true
 append_cache_entry INSTALL_ZEEKCTL      BOOL   true
 append_cache_entry CPACK_SOURCE_IGNORE_FILES STRING
 append_cache_entry ENABLE_MOBILE_IPV6   BOOL   false
-append_cache_entry SANITIZERS           STRING ""
+append_cache_entry ZEEK_SANITIZERS      STRING ""
 
 # parse arguments
 while [ $# -ne 0 ]; do
@@ -240,7 +240,7 @@ while [ $# -ne 0 ]; do
             append_cache_entry ENABLE_PERFTOOLS_DEBUG BOOL   true
             ;;
         --sanitizers=*)
-            append_cache_entry SANITIZERS    STRING    $optarg
+            append_cache_entry ZEEK_SANITIZERS    STRING    $optarg
             ;;
         --enable-jemalloc)
             append_cache_entry ENABLE_JEMALLOC     BOOL   true