diff --git a/macbuild/ReadMe.md b/macbuild/ReadMe.md
index 75a3c99c8..89f1ac98c 100644
--- a/macbuild/ReadMe.md
+++ b/macbuild/ReadMe.md
@@ -1,6 +1,6 @@
-Relevant KLayout version: 0.29.2<br>
+Relevant KLayout version: 0.29.3<br>
 Author: Kazzz-S<br>
-Last modified: 2024-06-09<br>
+Last modified: 2024-07-05<br>
 
 # 1. Introduction
 This directory **`macbuild`** contains various files required for building KLayout (http://www.klayout.de/) version 0.29.0 or later for different 64-bit macOS, including:
@@ -61,7 +61,7 @@ You need to have the followings:
 
 # 5. Command-line options of **`build4mac.py`**
 
-**`build4mac.py`** is the top level Python script for for building KLayout for a macOS.
+**`build4mac.py`** is the top level Python script for building KLayout for a macOS.
 The operating system type is detected automatically.
 
 ```
@@ -102,7 +102,7 @@ $ [python] ./build4mac.py
    [-u|--noqtuitools]   : don't include uitools in Qt binding                            | disabled
    [-g|--nolibgit2]     : don't include libgit2 for Git package support                  | disabled
    [-m|--make <option>] : option passed to 'make'                                        | '--jobs=4'
-   [-d|--debug]         : enable debug mode build                                        | disabled
+   [-d|--debug]         : enable debug mode build; AddressSanitizer (ASAN) is linked     | disabled
    [-c|--checkcom]      : check command-line and exit without building                   | disabled
    [-y|--deploy]        : deploy executables and dylibs, including Qt's Frameworks       | disabled
    [-Y|--DEPLOY]        : deploy executables and dylibs for those who built KLayout      | disabled
@@ -189,10 +189,8 @@ $ ./build4mac.py -q qt5macports -r mp33 -p mp311 -Y
 4. Copy/move the generated application bundle **`klayout.app`** to your **`/Applications`** directory for installation.
 
 ### 6C. Fully Homebrew-flavored build with Homebrew Ruby 3.3 and Homebrew Python 3.11
-> [!CAUTION]
-> To build KLayout >= 0.29.0, you need "Qt6" to address [the compilation issue](https://github.com/KLayout/klayout/issues/1599).<br>
-> However, the current KLayout is not compliant with the latest Qt6.7.0, so you will get another compilation error.<br>
-> Therefore, this section will be disabled for the time being.
+> [!IMPORTANT]
+> To build KLayout >= 0.29.0, you need "Qt6" >= 6.7.1 to address [the compilation issue](https://github.com/KLayout/klayout/issues/1599).<br>
 
 0. Install Homebrew, then install Qt6, Ruby 3.3, Python 3.11, and libgit2 by
 ```
@@ -225,10 +223,8 @@ $ ./build4mac.py -q qt6brew -r hb33 -p hb311 -Y
 4. Copy/move the generated application bundle **`klayout.app`** to your **`/Applications`** directory for installation.
 
 ### 6D. Partially Homebrew-flavored build with System Ruby and Homebrew Python 3.11
-> [!CAUTION]
-> To build KLayout >= 0.29.0, you need "Qt6" to address [the compilation issue](https://github.com/KLayout/klayout/issues/1599).<br>
-> However, the current KLayout is not compliant with the latest Qt6.7.0, so you will get another compilation error.<br>
-> Therefore, this section will be disabled for the time being.
+> [!IMPORTANT]
+> To build KLayout >= 0.29.0, you need "Qt6" >= 6.7.1 to address [the compilation issue](https://github.com/KLayout/klayout/issues/1599).<br>
 
 0. Install Homebrew, then install Qt6, Python 3.11, and libgit2 by
 ```
@@ -263,7 +259,7 @@ $ ./build4mac.py -q qt6brew -r sys -p hb311 -y
 
 ### 6E. Heterogeneous combination of MacPorts Qt5, System Ruby, and Homebrew Python 3.11
 > [!IMPORTANT]
-> This is a practical solution for building an HW*.dmg package.
+> This is another practical solution for building a popular HW*.dmg package.
 
 0. Install MacPorts, then install Qt5 and libgit2 by
 ```
@@ -347,7 +343,37 @@ A sample content (`*.app.Bash`) of the script bundle can be found in `Resources/
 
 ----
 
-# 7. Making a DMG installer
+# 7. QA Tests
+You can optionally conduct QA tests using the `ut_runner` executable.<br>
+[This forum post](https://www.klayout.de/forum/discussion/comment/11012/#Comment_11012) provides information on the unit tests, mainly for Linux.
+In the macOS environment, the QA test working directory is `[ST|LW|HB]-build_directory.macQAT`, where you will find `macQAT.py`, a wrapper script for the `ut_runner` executable.<br>
+Some required environment variables including `TESTSRC`, `TESTTMP`, and `DYLD_LIBRARY_PATH` are set by `macQAT.py`.<br>
+
+1. Change directory to `[ST|LW|HB]-build_directory.macQAT`
+```
+cd [ST|LW|HB]-build_directory.macQAT
+```
+
+2. To print usage of `ut_runner`, run `macQAT.py` with '-u'
+```
+./macQAT.py -u
+```
+
+3. To start the KLayout main GUI window, run `macQAT.py` with '-k'
+```
+./macQAT.py -k
+```
+
+4. To normally run `ut_runner`, invoke `macQAT.py` with '-r'
+```
+./macQAT.py -r
+```
+
+If required, you can use the `-x <test>` option to skip some erroneous tests.
+
+----
+
+# 8. Making a DMG installer
 You can make a DMG installer using another Python script **`makeDMG4mac.py`**.<br>
 This script requires a directory generated by **`build4mac.py`** with the [-y|-Y] option (refer to 6B through 6E).
 
diff --git a/macbuild/build4mac.py b/macbuild/build4mac.py
index b5a512947..b0e6075d2 100755
--- a/macbuild/build4mac.py
+++ b/macbuild/build4mac.py
@@ -80,7 +80,7 @@ def GenerateUsage(platform):
     usage += "   [-u|--noqtuitools]   : don't include uitools in Qt binding                            | disabled\n"
     usage += "   [-g|--nolibgit2]     : don't include libgit2 for Git package support                  | disabled\n"
     usage += "   [-m|--make <option>] : option passed to 'make'                                        | '--jobs=4'\n"
-    usage += "   [-d|--debug]         : enable debug mode build                                        | disabled\n"
+    usage += "   [-d|--debug]         : enable debug mode build; AddressSanitizer (ASAN) is linked     | disabled\n"
     usage += "   [-c|--checkcom]      : check command-line and exit without building                   | disabled\n"
     usage += "   [-y|--deploy]        : deploy executables and dylibs, including Qt's Frameworks       | disabled\n"
     usage += "   [-Y|--DEPLOY]        : deploy executables and dylibs for those who built KLayout      | disabled\n"
@@ -1007,6 +1007,7 @@ def Build_pymod_wheel(parameters):
 # @return 0 on success; non-zero (1), otherwise
 #------------------------------------------------------------------------------
 def Run_Build_Command(config, parameters):
+    DebugMode = config['DebugMode']
     ModuleQt  = config['ModuleQt']
     NoLibGit2 = config['NoLibGit2']
     ToolDebug = config['ToolDebug']
@@ -1015,8 +1016,22 @@ def Run_Build_Command(config, parameters):
     else:
         jump2pymod_wheel = True
 
+    #-----------------------------------------------------------------
+    # [1] Use the AddressSanitizer (ASan) in the debug build.
+    #     This environment variable is tested in ../src/klayout.pri.
+    #-----------------------------------------------------------------
+    try:
+        useAsan = os.environ['MAC_USE_ASAN']
+    except KeyError:
+        pass
+    else:
+        del os.environ['MAC_USE_ASAN']
+
+    if DebugMode:
+        os.environ['MAC_USE_ASAN'] = "1"
+
     #-----------------------------------------------------
-    # [1] Set two environment variables to use libgit2
+    # [2] Set two environment variables to use libgit2
     #-----------------------------------------------------
     if not NoLibGit2:
         # Using MacPorts
@@ -1048,7 +1063,7 @@ def Run_Build_Command(config, parameters):
 
     if not jump2pymod_wheel:
         #-----------------------------------------------------
-        # [2] Set parameters passed to the main Bash script
+        # [3] Set parameters passed to the main Bash script
         #-----------------------------------------------------
         cmd_args = ""
 
@@ -1106,7 +1121,7 @@ def Run_Build_Command(config, parameters):
             cmd_args += " \\\n  -nopython"
 
         #-----------------------------------------------------
-        # [3] Make the consolidated command line
+        # [4] Make the consolidated command line
         #-----------------------------------------------------
         command  = "time"
         command += " \\\n  %s" % parameters['build_cmd']
@@ -1119,7 +1134,7 @@ def Run_Build_Command(config, parameters):
             sys.exit(0)
 
         #-----------------------------------------------------
-        # [4] Invoke the main Bash script; takes time:-)
+        # [5] Invoke the main Bash script; takes time:-)
         #-----------------------------------------------------
         myscript = os.path.basename(__file__)
         ret = subprocess.call( command, shell=True )
@@ -1138,7 +1153,7 @@ def Run_Build_Command(config, parameters):
         print( "", file=sys.stderr )
 
         #------------------------------------------------------------------------
-        # [5] Prepare "*.macQAT/" directory for the QATest.
+        # [6] Prepare "*.macQAT/" directory for the QATest.
         #     Binaries under "*.macQAT/" such as *.dylib will be touched later.
         #------------------------------------------------------------------------
         print( "### Preparing <%s>" % MacBuildDirQAT )
@@ -1177,7 +1192,7 @@ def Run_Build_Command(config, parameters):
         print( "", file=sys.stderr )
 
     #------------------------------------------------------------------------
-    # [6] Build <pymod> for some predetermined environments on demand
+    # [7] Build <pymod> for some predetermined environments on demand
     #------------------------------------------------------------------------
     BuildPymodWhl = parameters['BuildPymodWhl']
     if BuildPymodWhl:
diff --git a/macbuild/macQAT.py b/macbuild/macQAT.py
index bd73ddcc1..0dc26e24d 100755
--- a/macbuild/macQAT.py
+++ b/macbuild/macQAT.py
@@ -107,7 +107,7 @@ def GetTimeStamp():
 def ParseCommandLineArguments():
     global Usage
     global RunnerUsage
-    global StartKLayout 
+    global StartKLayout
     global Run
     global ContinueOnError
     global TestsExcluded
@@ -216,7 +216,9 @@ def ExportEnvVariables():
     MyEnviron[ 'TESTTMP' ] = WorkDir
     if System == "Darwin":
         MyEnviron[ 'DYLD_LIBRARY_PATH' ] = "%s:%s/db_plugins:%s/lay_plugins:%s/pymod" % (ProjectDir, ProjectDir, ProjectDir, ProjectDir)
-        for env in [ 'TESTSRC', 'TESTTMP', 'DYLD_LIBRARY_PATH' ]:
+        MyEnviron[ 'MallocNanoZone' ] = "0"
+        MyEnviron[ 'ASAN_OPTIONS' ] = "ast_unwind_on_malloc=0:verbosity=1:detect_leaks=0:abort_on_error=0:halt_on_error=0:symbolize=1"
+        for env in [ 'TESTSRC', 'TESTTMP', 'DYLD_LIBRARY_PATH', 'MallocNanoZone', 'ASAN_OPTIONS' ]:
             os.environ[env] = MyEnviron[env]
     else:
         MyEnviron[ 'LD_LIBRARY_PATH' ] = "%s:%s/db_plugins:%s/lay_plugins:%s/pymod" % (ProjectDir, ProjectDir, ProjectDir, ProjectDir)
@@ -283,7 +285,7 @@ def Main():
     #-------------------------------------------------------
     if StartKLayout:
         StartKLatyouGUIWindow()
-    
+
     #-------------------------------------------------------
     # [4] Run the unit tester
     #-------------------------------------------------------
diff --git a/macbuild/nightlyBuild.py b/macbuild/nightlyBuild.py
index 5732900ed..79c27c486 100755
--- a/macbuild/nightlyBuild.py
+++ b/macbuild/nightlyBuild.py
@@ -78,8 +78,8 @@ def Get_Build_Target_Dict():
 # @param[in] platform   platform name
 #
 # @return (dictionary1, dictionary2)-tupple
-#          dictionary1: key=(qtVer, mnemonic), value=build option list
-#          dictionary2: key=(qtVer, mnemonic), value=log file name
+#          dictionary1: key=(qtVer, mnemonic, bdType), value=build option list
+#          dictionary2: key=(qtVer, mnemonic, bdType), value=log file name
 #------------------------------------------------------------------------------
 def Get_Build_Options( targetDic, platform ):
     buildOp = dict()
@@ -94,38 +94,61 @@ def Get_Build_Options( targetDic, platform ):
         for key in targetDic.keys():
             target = targetDic[key]
             if target == "std":
-                buildOp[(qtVer, "std")] = [ '-q', '%sMacPorts' % qtType, '-r', 'sys',  '-p', 'sys' ]
-                logfile[(qtVer, "std")] = "%sMP.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "RsysPsys")
+                buildOp[(qtVer, "std", "r")] = [ '-q', '%sMacPorts' % qtType, '-r', 'sys',  '-p', 'sys' ]
+                logfile[(qtVer, "std", "r")] = "%sMP.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "RsysPsys")
+                buildOp[(qtVer, "std", "d")] = [ '-q', '%sMacPorts' % qtType, '-r', 'sys',  '-p', 'sys', '--debug' ]
+                logfile[(qtVer, "std", "d")] = "%sMP.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "debug", "RsysPsys")
             elif target == "ports":
-                buildOp[(qtVer, "ports")] = [ '-q', '%sMacPorts' % qtType, '-r', 'MP33', '-p', 'MP311' ]
-                logfile[(qtVer, "ports")] = "%sMP.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "Rmp33Pmp311")
+                buildOp[(qtVer, "ports", "r")] = [ '-q', '%sMacPorts' % qtType, '-r', 'MP33', '-p', 'MP311' ]
+                logfile[(qtVer, "ports", "r")] = "%sMP.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "Rmp33Pmp311")
+                buildOp[(qtVer, "ports", "d")] = [ '-q', '%sMacPorts' % qtType, '-r', 'MP33', '-p', 'MP311', '--debug' ]
+                logfile[(qtVer, "ports", "d")] = "%sMP.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "debug", "Rmp33Pmp311")
             elif target == "brew":
-                buildOp[(qtVer, "brew")] = [ '-q', '%sBrew' % qtType, '-r', 'HB33', '-p', 'HB311' ]
-                logfile[(qtVer, "brew")] = "%sBrew.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "Rhb33Phb311")
+                buildOp[(qtVer, "brew", "r")] = [ '-q', '%sBrew' % qtType, '-r', 'HB33', '-p', 'HB311' ]
+                logfile[(qtVer, "brew", "r")] = "%sBrew.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "Rhb33Phb311")
+                buildOp[(qtVer, "brew", "d")] = [ '-q', '%sBrew' % qtType, '-r', 'HB33', '-p', 'HB311', '--debug' ]
+                logfile[(qtVer, "brew", "d")] = "%sBrew.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "debug", "Rhb33Phb311")
             elif target == "brewHW":
-                buildOp[(qtVer, "brewHW")] = [ '-q', '%sBrew' % qtType, '-r', 'sys',  '-p', 'HB311' ]
-                logfile[(qtVer, "brewHW")] = "%sBrew.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "RsysPhb311")
+                buildOp[(qtVer, "brewHW", "r")] = [ '-q', '%sBrew' % qtType, '-r', 'sys',  '-p', 'HB311' ]
+                logfile[(qtVer, "brewHW", "r")] = "%sBrew.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "RsysPhb311")
+                buildOp[(qtVer, "brewHW", "d")] = [ '-q', '%sBrew' % qtType, '-r', 'sys',  '-p', 'HB311', '--debug' ]
+                logfile[(qtVer, "brewHW", "d")] = "%sBrew.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "debug", "RsysPhb311")
             elif target == "ana3":
-                buildOp[(qtVer, "ana3")] = [ '-q', '%sAna3' % qtType, '-r', 'Ana3', '-p', 'Ana3' ]
-                logfile[(qtVer, "ana3")] = "%sAna3.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "Rana3Pana3")
+                buildOp[(qtVer, "ana3", "r")] = [ '-q', '%sAna3' % qtType, '-r', 'Ana3', '-p', 'Ana3' ]
+                logfile[(qtVer, "ana3", "r")] = "%sAna3.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "Rana3Pana3")
+                buildOp[(qtVer, "ana3", "d")] = [ '-q', '%sAna3' % qtType, '-r', 'Ana3', '-p', 'Ana3', '--debug' ]
+                logfile[(qtVer, "ana3", "d")] = "%sAna3.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "debug", "Rana3Pana3")
             elif target == "brewA":
-                buildOp[(qtVer, "brewA")] = [ '-q', '%sBrew' % qtType, '-r', 'HB33', '-p', 'HBAuto' ]
-                logfile[(qtVer, "brewA")] = "%sBrew.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "Rhb33Phbauto")
+                buildOp[(qtVer, "brewA", "r")] = [ '-q', '%sBrew' % qtType, '-r', 'HB33', '-p', 'HBAuto' ]
+                logfile[(qtVer, "brewA", "r")] = "%sBrew.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "Rhb33Phbauto")
+                buildOp[(qtVer, "brewA", "d")] = [ '-q', '%sBrew' % qtType, '-r', 'HB33', '-p', 'HBAuto', '--debug' ]
+                logfile[(qtVer, "brewA", "d")] = "%sBrew.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "debug", "Rhb33Phbauto")
             elif target == "brewAHW":
-                buildOp[(qtVer, "brewAHW")] = [ '-q', '%sBrew' % qtType, '-r', 'sys',  '-p', 'HBAuto' ]
-                logfile[(qtVer, "brewAHW")] = "%sBrew.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "RsysPhbauto")
+                buildOp[(qtVer, "brewAHW", "r")] = [ '-q', '%sBrew' % qtType, '-r', 'sys',  '-p', 'HBAuto' ]
+                logfile[(qtVer, "brewAHW", "r")] = "%sBrew.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "RsysPhbauto")
+                buildOp[(qtVer, "brewAHW", "d")] = [ '-q', '%sBrew' % qtType, '-r', 'sys',  '-p', 'HBAuto', '--debug' ]
+                logfile[(qtVer, "brewAHW", "d")] = "%sBrew.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "debug", "RsysPhbauto")
             elif target == "pbrew":
-                buildOp[(qtVer, "pbrew")] = [ '-q', '%sMacPorts' % qtType, '-r', 'HB33', '-p', 'HB311' ]
-                logfile[(qtVer, "pbrew")] = "%sMP.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "Rhb33Phb311")
+                buildOp[(qtVer, "pbrew", "r")] = [ '-q', '%sMacPorts' % qtType, '-r', 'HB33', '-p', 'HB311' ]
+                logfile[(qtVer, "pbrew", "r")] = "%sMP.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "Rhb33Phb311")
+                buildOp[(qtVer, "pbrew", "d")] = [ '-q', '%sMacPorts' % qtType, '-r', 'HB33', '-p', 'HB311', '--debug' ]
+                logfile[(qtVer, "pbrew", "d")] = "%sMP.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "debug", "Rhb33Phb311")
             elif target == "pbrewHW":
-                buildOp[(qtVer, "pbrewHW")] = [ '-q', '%sMacPorts' % qtType, '-r', 'sys',  '-p', 'HB311' ]
-                logfile[(qtVer, "pbrewHW")] = "%sMP.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "RsysPhb311")
+                buildOp[(qtVer, "pbrewHW", "r")] = [ '-q', '%sMacPorts' % qtType, '-r', 'sys',  '-p', 'HB311' ]
+                logfile[(qtVer, "pbrewHW", "r")] = "%sMP.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "release", "RsysPhb311")
+                buildOp[(qtVer, "pbrewHW", "d")] = [ '-q', '%sMacPorts' % qtType, '-r', 'sys',  '-p', 'HB311', '--debug' ]
+                logfile[(qtVer, "pbrewHW", "d")] = "%sMP.build.macos-%s-%s-%s.log" % (qtType.lower(), platform, "debug", "RsysPhb311")
 
         if WithPymod:
-            buildOp[(qtVer,"ports")] = buildOp[(qtVer,"ports")] + ['--buildPymod']
-            buildOp[(qtVer,"brew")]  = buildOp[(qtVer,"brew")]  + ['--buildPymod']
-            buildOp[(qtVer,"ana3")]  = buildOp[(qtVer,"ana3")]  + ['--buildPymod']
-            buildOp[(qtVer,"pbrew")] = buildOp[(qtVer,"pbrew")] + ['--buildPymod']
+            buildOp[(qtVer, "ports", "r")] = buildOp[(qtVer, "ports", "r")] + ['--buildPymod']
+            buildOp[(qtVer, "brew", "r")]  = buildOp[(qtVer, "brew", "r")]  + ['--buildPymod']
+            buildOp[(qtVer, "ana3", "r")]  = buildOp[(qtVer, "ana3", "r")]  + ['--buildPymod']
+            buildOp[(qtVer, "pbrew", "r")] = buildOp[(qtVer, "pbrew", "r")] + ['--buildPymod']
+
+            buildOp[(qtVer, "ports", "d")] = buildOp[(qtVer, "ports", "d")]
+            buildOp[(qtVer, "brew", "d")]  = buildOp[(qtVer, "brew", "d")]
+            buildOp[(qtVer, "ana3", "d")]  = buildOp[(qtVer, "ana3", "d")]
+            buildOp[(qtVer, "pbrew", "d")] = buildOp[(qtVer, "pbrew", "d")]
 
     return (buildOp, logfile)
 
@@ -135,7 +158,7 @@ def Get_Build_Options( targetDic, platform ):
 # @param[in] targetDic  build target dictionary
 # @param[in] platform   platform name
 #
-# @return a dictionary; key=(qtVer, mnemonic), value=".macQAT" directory
+# @return a dictionary; key=(qtVer, mnemonic, bdType), value=".macQAT" directory
 #------------------------------------------------------------------------------
 def Get_QAT_Directory( targetDic, platform ):
     dirQAT = dict()
@@ -149,23 +172,32 @@ def Get_QAT_Directory( targetDic, platform ):
         for key in targetDic.keys():
             target = targetDic[key]
             if target == "std":
-                dirQAT[(qtVer, "std")]     = '%sMP.build.macos-%s-release-RsysPsys.macQAT'       % (qtType.lower(), platform)
+                dirQAT[(qtVer, "std", "r")] = '%sMP.build.macos-%s-release-RsysPsys.macQAT' % (qtType.lower(), platform)
+                dirQAT[(qtVer, "std", "d")] = '%sMP.build.macos-%s-debug-RsysPsys.macQAT'   % (qtType.lower(), platform)
             elif target == "ports":
-                dirQAT[(qtVer, "ports")]   = '%sMP.build.macos-%s-release-Rmp33Pmp311.macQAT'    % (qtType.lower(), platform)
+                dirQAT[(qtVer, "ports", "r")] = '%sMP.build.macos-%s-release-Rmp33Pmp311.macQAT' % (qtType.lower(), platform)
+                dirQAT[(qtVer, "ports", "d")] = '%sMP.build.macos-%s-debug-Rmp33Pmp311.macQAT'   % (qtType.lower(), platform)
             elif target == "brew":
-                dirQAT[(qtVer, "brew")]    = '%sBrew.build.macos-%s-release-Rhb33Phb311.macQAT'  % (qtType.lower(), platform)
+                dirQAT[(qtVer, "brew", "r")] = '%sBrew.build.macos-%s-release-Rhb33Phb311.macQAT' % (qtType.lower(), platform)
+                dirQAT[(qtVer, "brew", "d")] = '%sBrew.build.macos-%s-debug-Rhb33Phb311.macQAT'   % (qtType.lower(), platform)
             elif target == "brewHW":
-                dirQAT[(qtVer, "brewHW")]  = '%sBrew.build.macos-%s-release-RsysPhb311.macQAT'   % (qtType.lower(), platform)
+                dirQAT[(qtVer, "brewHW", "r")] = '%sBrew.build.macos-%s-release-RsysPhb311.macQAT' % (qtType.lower(), platform)
+                dirQAT[(qtVer, "brewHW", "d")] = '%sBrew.build.macos-%s-debug-RsysPhb311.macQAT'   % (qtType.lower(), platform)
             elif target == "ana3":
-                dirQAT[(qtVer, "ana3")]    = '%sAna3.build.macos-%s-release-Rana3Pana3.macQAT'   % (qtType.lower(), platform)
+                dirQAT[(qtVer, "ana3", "r")] = '%sAna3.build.macos-%s-release-Rana3Pana3.macQAT' % (qtType.lower(), platform)
+                dirQAT[(qtVer, "ana3", "d")] = '%sAna3.build.macos-%s-debug-Rana3Pana3.macQAT'   % (qtType.lower(), platform)
             elif target == "brewA":
-                dirQAT[(qtVer, "brewA")]   = '%sBrew.build.macos-%s-release-Rhb33Phbauto.macQAT' % (qtType.lower(), platform)
+                dirQAT[(qtVer, "brewA", "r")] = '%sBrew.build.macos-%s-release-Rhb33Phbauto.macQAT' % (qtType.lower(), platform)
+                dirQAT[(qtVer, "brewA", "d")] = '%sBrew.build.macos-%s-debug-Rhb33Phbauto.macQAT'   % (qtType.lower(), platform)
             elif target == "brewAHW":
-                dirQAT[(qtVer, "brewAHW")] = '%sBrew.build.macos-%s-release-RsysPhbauto.macQAT'  % (qtType.lower(), platform)
+                dirQAT[(qtVer, "brewAHW", "r")] = '%sBrew.build.macos-%s-release-RsysPhbauto.macQAT' % (qtType.lower(), platform)
+                dirQAT[(qtVer, "brewAHW", "d")] = '%sBrew.build.macos-%s-debug-RsysPhbauto.macQAT'   % (qtType.lower(), platform)
             elif target == "pbrew":
-                dirQAT[(qtVer, "pbrew")]   = '%sMP.build.macos-%s-release-Rhb33Phb311.macQAT'    % (qtType.lower(), platform)
+                dirQAT[(qtVer, "pbrew", "r")] = '%sMP.build.macos-%s-release-Rhb33Phb311.macQAT' % (qtType.lower(), platform)
+                dirQAT[(qtVer, "pbrew", "d")] = '%sMP.build.macos-%s-debug-Rhb33Phb311.macQAT'   % (qtType.lower(), platform)
             elif target == "pbrewHW":
-                dirQAT[(qtVer, "pbrewHW")] = '%sMP.build.macos-%s-release-RsysPhb311.macQAT'     % (qtType.lower(), platform)
+                dirQAT[(qtVer, "pbrewHW", "r")] = '%sMP.build.macos-%s-release-RsysPhb311.macQAT' % (qtType.lower(), platform)
+                dirQAT[(qtVer, "pbrewHW", "d")] = '%sMP.build.macos-%s-debug-RsysPhb311.macQAT'   % (qtType.lower(), platform)
 
     return dirQAT
 
@@ -177,7 +209,7 @@ def Get_QAT_Directory( targetDic, platform ):
 # @param[in] srlDMG     serial number of DMG
 # @param[in] makeflag   True to make; False to clean
 #
-# @return a dictionary; key=(qtVer, mnemonic), value=build option list
+# @return a dictionary; key=(qtVer, mnemonic, bdType), value=build option list
 #------------------------------------------------------------------------------
 def Get_Package_Options( targetDic, platform, srlDMG, makeflag ):
     packOp = dict()
@@ -196,52 +228,70 @@ def Get_Package_Options( targetDic, platform, srlDMG, makeflag ):
         for key in targetDic.keys():
             target = targetDic[key]
             if target == "std":
-                packOp[(qtVer, "std")]     = [ '-p', 'ST-%sMP.pkg.macos-%s-release-RsysPsys'       % (qtType.lower(), platform),
-                                               '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "std", "r")] = [ '-p', 'ST-%sMP.pkg.macos-%s-release-RsysPsys' % (qtType.lower(), platform),
+                                                '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "std", "d")] = [ '-p', 'ST-%sMP.pkg.macos-%s-debug-RsysPsys'   % (qtType.lower(), platform),
+                                                '-s', '%d' % srlDMG, '%s' % flag ]
             elif target == "ports":
-                packOp[(qtVer, "ports")]   = [ '-p', 'LW-%sMP.pkg.macos-%s-release-Rmp33Pmp311'    % (qtType.lower(), platform),
-                                               '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "ports", "r")] = [ '-p', 'LW-%sMP.pkg.macos-%s-release-Rmp33Pmp311' % (qtType.lower(), platform),
+                                                  '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "ports", "d")] = [ '-p', 'LW-%sMP.pkg.macos-%s-debug-Rmp33Pmp311'   % (qtType.lower(), platform),
+                                                  '-s', '%d' % srlDMG, '%s' % flag ]
             elif target == "brew":
-                packOp[(qtVer, "brew")]    = [ '-p', 'LW-%sBrew.pkg.macos-%s-release-Rhb33Phb311'  % (qtType.lower(), platform),
-                                               '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "brew", "r")] = [ '-p', 'LW-%sBrew.pkg.macos-%s-release-Rhb33Phb311' % (qtType.lower(), platform),
+                                                 '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "brew", "d")] = [ '-p', 'LW-%sBrew.pkg.macos-%s-debug-Rhb33Phb311'   % (qtType.lower(), platform),
+                                                 '-s', '%d' % srlDMG, '%s' % flag ]
             elif target == "brewHW":
-                packOp[(qtVer, "brewHW")]  = [ '-p', 'HW-%sBrew.pkg.macos-%s-release-RsysPhb311'   % (qtType.lower(), platform),
-                                               '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "brewHW", "r")] = [ '-p', 'HW-%sBrew.pkg.macos-%s-release-RsysPhb311' % (qtType.lower(), platform),
+                                                   '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "brewHW", "d")] = [ '-p', 'HW-%sBrew.pkg.macos-%s-debug-RsysPhb311'   % (qtType.lower(), platform),
+                                                   '-s', '%d' % srlDMG, '%s' % flag ]
             elif target == "ana3":
-                packOp[(qtVer, "ana3")]    = [ '-p', 'LW-%sAna3.pkg.macos-%s-release-Rana3Pana3'   % (qtType.lower(), platform),
-                                               '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "ana3", "r")] = [ '-p', 'LW-%sAna3.pkg.macos-%s-release-Rana3Pana3' % (qtType.lower(), platform),
+                                                 '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "ana3", "d")] = [ '-p', 'LW-%sAna3.pkg.macos-%s-debug-Rana3Pana3'   % (qtType.lower(), platform),
+                                                 '-s', '%d' % srlDMG, '%s' % flag ]
             elif target == "brewA":
-                packOp[(qtVer, "brewA")]   = [ '-p', 'LW-%sBrew.pkg.macos-%s-release-Rhb33Phbauto' % (qtType.lower(), platform),
-                                               '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "brewA", "r")] = [ '-p', 'LW-%sBrew.pkg.macos-%s-release-Rhb33Phbauto' % (qtType.lower(), platform),
+                                                  '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "brewA", "d")] = [ '-p', 'LW-%sBrew.pkg.macos-%s-debug-Rhb33Phbauto'   % (qtType.lower(), platform),
+                                                  '-s', '%d' % srlDMG, '%s' % flag ]
             elif target == "brewAHW":
-                packOp[(qtVer, "brewAHW")] = [ '-p', 'HW-%sBrew.pkg.macos-%s-release-RsysPhbauto'  % (qtType.lower(), platform),
-                                               '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "brewAHW", "r")] = [ '-p', 'HW-%sBrew.pkg.macos-%s-release-RsysPhbauto' % (qtType.lower(), platform),
+                                                    '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "brewAHW", "d")] = [ '-p', 'HW-%sBrew.pkg.macos-%s-debug-RsysPhbauto'   % (qtType.lower(), platform),
+                                                    '-s', '%d' % srlDMG, '%s' % flag ]
             elif target == "pbrew":
-                packOp[(qtVer, "pbrew")]   = [ '-p', 'LW-%sMP.pkg.macos-%s-release-Rhb33Phb311'    % (qtType.lower(), platform),
-                                               '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "pbrew", "r")] = [ '-p', 'LW-%sMP.pkg.macos-%s-release-Rhb33Phb311' % (qtType.lower(), platform),
+                                                  '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "pbrew", "d")] = [ '-p', 'LW-%sMP.pkg.macos-%s-debug-Rhb33Phb311'   % (qtType.lower(), platform),
+                                                  '-s', '%d' % srlDMG, '%s' % flag ]
             elif target == "pbrewHW":
-                packOp[(qtVer, "pbrewHW")] = [ '-p', 'HW-%sMP.pkg.macos-%s-release-RsysPhb311'     % (qtType.lower(), platform),
-                                               '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "pbrewHW", "r")] = [ '-p', 'HW-%sMP.pkg.macos-%s-release-RsysPhb311' % (qtType.lower(), platform),
+                                                    '-s', '%d' % srlDMG, '%s' % flag ]
+                packOp[(qtVer, "pbrewHW", "d")] = [ '-p', 'HW-%sMP.pkg.macos-%s-debug-RsysPhb311'   % (qtType.lower(), platform),
+                                                    '-s', '%d' % srlDMG, '%s' % flag ]
     return packOp
 
 #------------------------------------------------------------------------------
 ## To parse the command line arguments
 #------------------------------------------------------------------------------
 def Parse_CommandLine_Arguments():
-    global Usage     # usage
-    global QtType    # Qt type
-    global Target    # target list
-    global QtTarget  # list of (Qt, target)-tuple
-    global Build     # operation flag
-    global WithPymod # operation flag
-    global QATest    # operation flag
-    global QACheck   # operation flag
-    global MakeDMG   # operation flag
-    global CleanDMG  # operation flag
-    global Upload    # operation flag
-    global SrlDMG    # DMG serial number
-    global Dropbox   # Dropbox directory
-    global DryRun    # True for dry-run
+    global Usage        # usage
+    global QtType       # Qt type
+    global Target       # target list
+    global QtTarget     # list of (Qt, target, bdType)-tuple
+    global Build        # operation flag
+    global WithPymod    # operation flag
+    global QATest       # operation flag
+    global QACheck      # operation flag
+    global MakeDMG      # operation flag
+    global CleanDMG     # operation flag
+    global Upload       # operation flag
+    global SrlDMG       # DMG serial number
+    global Dropbox      # Dropbox directory
+    global DryRun       # True for dry-run
 
     platform = Test_My_Platform()
     if platform in [ "Sonoma", "Ventura", "Monterey" ]:
@@ -262,13 +312,14 @@ def Parse_CommandLine_Arguments():
     Usage += "   [--target <list>] : 0='std', 1='ports', 2='brew', 3='brewHW', 4='ana3',   | '%s'\n" % targetopt
     Usage += "                       5='brewA', 6='brewAHW', 12='pbrew', 13='pbrewHW'      |\n"
     Usage += "                       * with --qt=6, use --target='0,1,2,3' (4 is ignored)  |\n"
-    Usage += "   [--qttarget <tuple list>] : ex. '5,1' for qt=5, target=1                  | disabled\n"
+    Usage += "   [--qttarget <tuple list>] : ex. '5,1,r'| qt=5, target=1, bdType='r'       | disabled\n"
+    Usage += "                                   '5,4,d', '6,4,r', and '6,4,d' are omitted |\n"
     Usage += "      + This option supersedes, if used, the --qt and --target combination.  |\n"
     Usage += "      + You can use this option multiple times.                              |\n"
     Usage += "      + Or you can pass those list by the 'nightlyBuild.csv' file.           |\n"
     Usage += "        A sample file 'macbuild/nightlyBuild.sample.csv' is available.       |\n"
     Usage += "   [--build] : build and deploy                                              | disabled\n"
-    Usage += "   [--pymod] : build and deploy Pymod, too                                   | disabled\n"
+    Usage += "   [--pymod] : build and deploy Pymod, too (release build only)              | disabled\n"
     Usage += "   [--test]  : run the QA Test                                               | disabled\n"
     Usage += "   [--check] : check the QA Test results                                     | disabled\n"
     Usage += "   [--makedmg|--cleandmg <srlno>] : make or clean DMGs                       | disabled\n"
@@ -302,7 +353,7 @@ def Parse_CommandLine_Arguments():
     p.add_option( '--qttarget',
                     action='append',
                     dest='qt_target',
-                    help='(Qt, target)-tuple' )
+                    help='(Qt, target, bdType)-tuple' )
 
     p.add_option( '--build',
                     action='store_true',
@@ -396,10 +447,10 @@ def Parse_CommandLine_Arguments():
     # Populate QtTarget
     QtTarget = list()
     for target in Target:
-        QtTarget.append( (QtType, target) )
+        QtTarget.append( (QtType, target, 'r') )
     QtType = None
     Target = None
-    print( "# The --qt and --target combination specifies..." )
+    print( "# The --qt and --target combination specifies for 'r'elease build..." )
     print(QtTarget)
 
     if len(opt.qt_target) == 1 and opt.qt_target[0] == "nightlyBuild.csv": # reserved file name
@@ -411,18 +462,24 @@ def Parse_CommandLine_Arguments():
             print(Usage)
             quit()
         for i in range(0, len(df)):
-            qt  = df.iloc[i,0]
-            idx = df.iloc[i,1]
-            if (qt == 5 and idx in [0,1,2,3,4,5,6,12,13]) or (qt == 6 and idx in [0,1,2,3, 5,6,12,13]):
-                QtTarget.append( (qt, targetDic[idx]) )
+            qt     = df.iloc[i,0]
+            idx    = df.iloc[i,1]
+            bdType = df.iloc[i,2].lower()[0]
+            if (qt == 5 and idx in [0,1,2,3,4,5,6,12,13] and bdType in ['r']) or \
+               (qt == 5 and idx in [0,1,2,3,  5,6,12,13] and bdType in ['d']) or \
+               (qt == 6 and idx in [0,1,2,3,  5,6,12,13] and bdType in ['r', 'd']):
+                QtTarget.append( (qt, targetDic[idx], bdType) )
     elif len(opt.qt_target) > 0:
         QtTarget     = list()
         withqttarget = True
         for item in opt.qt_target:
-            qt  = int(item.split(",")[0])
-            idx = int(item.split(",")[1])
-            if (qt == 5 and idx in [0,1,2,3,4,5,6,12,13]) or (qt == 6 and idx in [0,1,2,3, 5,6,12,13]):
-                QtTarget.append( (qt, targetDic[idx]) )
+            qt     = int(item.split(",")[0])
+            idx    = int(item.split(",")[1])
+            bdType =    (item.split(",")[2]).lower()[0]
+            if (qt == 5 and idx in [0,1,2,3,4,5,6,12,13] and bdType in ['r']) or \
+               (qt == 5 and idx in [0,1,2,3,  5,6,12,13] and bdType in ['d']) or \
+               (qt == 6 and idx in [0,1,2,3,  5,6,12,13] and bdType in ['r', 'd']):
+                QtTarget.append( (qt, targetDic[idx], bdType) )
     else:
         withqttarget = False
 
@@ -431,7 +488,7 @@ def Parse_CommandLine_Arguments():
             print( "# The --qttarget option superseded the --qt and --target combination" )
             print(QtTarget)
         else:
-            print( "! --qttarget is used but there is no valid (Qt, target)-tuple" )
+            print( "! --qttarget is used but there is no valid (Qt, target, bdTye)-tuple" )
             print(Usage)
             quit()
 
@@ -474,18 +531,18 @@ def Build_Deploy():
     myPlatform = Test_My_Platform()
     buildOp, logfile = Get_Build_Options( Get_Build_Target_Dict(), myPlatform )
 
-    for qttype, key in QtTarget:
-        if key == "ana3" and qttype == 6: # anaconda3 does not provide Qt6 so far
+    for qttype, key, bdType in QtTarget:
+        if key == "ana3" and (qttype == 6 or bdType == 'd'): # anaconda3 does not provide Qt6 | debug_lib
             continue
 
-        deplog = logfile[(qttype, key)].replace( ".log", ".dep.log" )
+        deplog = logfile[(qttype, key, bdType)].replace( ".log", ".dep.log" )
 
-        command1 = [ pyBuilder ] + buildOp[(qttype, key)]
+        command1 = [ pyBuilder ] + buildOp[(qttype, key, bdType)]
 
         if key in [ "std", "brewHW", "brewAHW", "pbrewHW" ] :
             command2  = "time"
             command2 += " \\\n  %s" % pyBuilder
-            for option in buildOp[(qttype, key)]:
+            for option in buildOp[(qttype, key, bdType)]:
                 command2 += " \\\n  %s" % option
             command2 += " \\\n  %s" % '-y'
             command2 += "  2>&1 | tee %s; \\\n" % deplog
@@ -493,7 +550,7 @@ def Build_Deploy():
         else:
             command2  = "time"
             command2 += " \\\n  %s" % pyBuilder
-            for option in buildOp[(qttype, key)]:
+            for option in buildOp[(qttype, key, bdType)]:
                 command2 += " \\\n  %s" % option
             command2 += " \\\n  %s" % '-Y'
             command2 += "  2>&1 | tee %s; \\\n" % deplog
@@ -544,8 +601,8 @@ def Run_QATest( excludeList ):
     myPlatform  = Test_My_Platform()
     dirQAT      = Get_QAT_Directory( Get_Build_Target_Dict(), myPlatform )
 
-    for qttype, key in QtTarget:
-        if key == "ana3" and qttype == 6: # anaconda3 does not provide Qt6 so far
+    for qttype, key, bdType in QtTarget:
+        if key == "ana3" and (qttype == 6 or bdType == 'd'): # anaconda3 does not provide Qt6 | debug_lib
             continue
 
         if key == "ana3":
@@ -555,9 +612,9 @@ def Run_QATest( excludeList ):
         command1 = [ pyRunnerQAT ] + [ '--run' ]
         if not exclude == "":
             command1 += [ '--exclude', '%s' % exclude ]
-        print( dirQAT[(qttype, key)], command1 )
+        print( dirQAT[(qttype, key, bdType)], command1 )
         #continue
-        os.chdir( dirQAT[(qttype, key)] )
+        os.chdir( dirQAT[(qttype, key, bdType)] )
 
         if subprocess.call( command1, shell=False ) != 0:
             print( "", file=sys.stderr )
@@ -585,14 +642,14 @@ def Check_QATest_Results( lines ):
     myPlatform  = Test_My_Platform()
     dirQAT      = Get_QAT_Directory( Get_Build_Target_Dict(), myPlatform )
 
-    for qttype, key in QtTarget:
-        if key == "ana3" and qttype == 6: # anaconda3 does not provide Qt6 so far
+    for qttype, key, bdType in QtTarget:
+        if key == "ana3" and (qttype == 6 or bdType == 'd'): # anaconda3 does not provide Qt6 | debug_lib
             continue
 
-        os.chdir( dirQAT[(qttype, key)] )
+        os.chdir( dirQAT[(qttype, key, bdType)] )
         logfile  = glob.glob( "*.log" )
         command1 = [ tailCommand ] + [ '-n', '%d' % lines ] + logfile
-        print( dirQAT[(qttype, key)], command1 )
+        print( dirQAT[(qttype, key, bdType)], command1 )
         #continue
 
         if subprocess.call( command1, shell=False ) != 0:
@@ -626,11 +683,11 @@ def DMG_Make( srlDMG ):
         shutil.rmtree( stashDMG )
     os.mkdir( stashDMG )
 
-    for qttype, key in QtTarget:
-        if key == "ana3" and qttype == 6: # anaconda3 does not provide Qt6 so far
+    for qttype, key, bdType in QtTarget:
+        if key == "ana3" and (qttype == 6 or bdType == 'd'): # anaconda3 does not provide Qt6 | debug_lib
             continue
 
-        command1 = [ pyDMGmaker ] + packOp[(qttype, key)]
+        command1 = [ pyDMGmaker ] + packOp[(qttype, key, bdType)]
         print(command1)
         #continue
 
@@ -666,11 +723,11 @@ def DMG_Clean( srlDMG ):
     if os.path.isdir( stashDMG ):
         shutil.rmtree( stashDMG )
 
-    for qttype, key in QtTarget:
-        if key == "ana3" and qttype == 6: # anaconda3 does not provide Qt6 so far
+    for qttype, key, bdType in QtTarget:
+        if key == "ana3" and (qttype == 6 or bdType == 'd'): # anaconda3 does not provide Qt6 | debug_lib
             continue
 
-        command1 = [ pyDMGmaker ] + packOp[(qttype, key)]
+        command1 = [ pyDMGmaker ] + packOp[(qttype, key, bdType)]
         print(command1)
         #continue
 
diff --git a/macbuild/nightlyBuild.sample.csv b/macbuild/nightlyBuild.sample.csv
index ed0f996c9..30ba786a3 100644
--- a/macbuild/nightlyBuild.sample.csv
+++ b/macbuild/nightlyBuild.sample.csv
@@ -10,19 +10,20 @@
 #     qtVer  = 5 or 6
 #     target = [0='std', 1='ports', 2='brew', 3='brewHW', 4='ana3',
 #               12='pbrew', 13='pbrewHW']
+#     bdType = ['r(elease)', 'd(ebug)']
 #   note that
-#     (qtVer,target)=(6,4) will be omitted
+#     (qtVer,target,bdType)=(6,4,r|d) and (5,4,d) will be omitted
 #-------------------------------------------------------------------------------
-qtVer,target
-5,0
-5,1
-6,2
-6,13
-5,4
-#6,0
-#6,1
-#6,2
-#6,3
-#6,4
-#6,12
-#6,13
+qtVer,target,bdType
+5,0,r
+5,1,r
+6,2,r
+6,13,r
+5,4,r
+#6,0,r
+#6,1,r
+#6,2,r
+#6,3,r
+#6,4,r
+#6,12,r
+#6,13,r
diff --git a/src/klayout.pri b/src/klayout.pri
index a370e8490..dd882e4c1 100644
--- a/src/klayout.pri
+++ b/src/klayout.pri
@@ -118,6 +118,15 @@ equals(HAVE_GIT2, "1") {
   DEFINES += HAVE_GIT2
 }
 
+# Use the Address Sanitizer for the debug build on Mac
+mac {
+  USE_ASAN_MAC = $$system(echo $$(MAC_USE_ASAN))
+  equals(USE_ASAN_MAC, "1") {
+    QMAKE_CXXFLAGS += -fsanitize=address
+    QMAKE_LFLAGS += -fsanitize=address
+  }
+}
+
 equals(HAVE_RUBY, "1") {
   !isEmpty(BITS_PATH) {
     include($$BITS_PATH/ruby/ruby.pri)