diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 60e7f2fe..b8a49568 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,10 +9,11 @@ name: 'CI'
 on: [push, workflow_dispatch]
 
 env:
+  CMAKE_REQUIRED_QUIET: 0
   DEBIAN_FRONTEND: noninteractive
   UPX_CMAKE_BUILD_FLAGS: --verbose
-  # 2023-07-05
-  ZIG_DIST_VERSION: 0.11.0-dev.3937+78eb3c561
+  # 2023-07-15
+  ZIG_DIST_VERSION: 0.11.0-dev.4002+7dd1cf26f
 
 jobs:
   job-rebuild-and-verify-stubs:
diff --git a/.github/workflows/misc-spell-check.yml b/.github/workflows/misc-spell-check.yml
index a39884e5..3ee213c4 100644
--- a/.github/workflows/misc-spell-check.yml
+++ b/.github/workflows/misc-spell-check.yml
@@ -4,6 +4,8 @@
 name: 'Misc - Spell check'
 on:
   workflow_dispatch:
+env:
+  DEBIAN_FRONTEND: noninteractive
 jobs:
   job-spell-check:
     name: 'Spell check'
diff --git a/.github/workflows/static-analyzer-clang-analyzer.yml b/.github/workflows/static-analyzer-clang-analyzer.yml
index bac9a868..56262a1d 100644
--- a/.github/workflows/static-analyzer-clang-analyzer.yml
+++ b/.github/workflows/static-analyzer-clang-analyzer.yml
@@ -1,9 +1,12 @@
 # Copyright (C) Markus Franz Xaver Johannes Oberhumer
-name: 'Static Analyzer - clang-analyzer'
 
+name: 'Static Analyzer - clang-analyzer'
 on:
   schedule: [cron: '10 5 * * 3'] # run weekly Wednesday 05:10 UTC
   workflow_dispatch:
+env:
+  CMAKE_REQUIRED_QUIET: 0
+  DEBIAN_FRONTEND: noninteractive
 
 jobs:
   job-analyze-clang-analyzer: # uses cmake + make
diff --git a/.github/workflows/static-analyzer-clang-tidy.yml b/.github/workflows/static-analyzer-clang-tidy.yml
index 4ae52186..e89279fd 100644
--- a/.github/workflows/static-analyzer-clang-tidy.yml
+++ b/.github/workflows/static-analyzer-clang-tidy.yml
@@ -1,9 +1,12 @@
 # Copyright (C) Markus Franz Xaver Johannes Oberhumer
-name: 'Static Analyzer - clang-tidy'
 
+name: 'Static Analyzer - clang-tidy'
 on:
   schedule: [cron: '30 5 * * 3'] # run weekly Wednesday 05:30 UTC
   workflow_dispatch:
+env:
+  CMAKE_REQUIRED_QUIET: 0
+  DEBIAN_FRONTEND: noninteractive
 
 jobs:
   job-analyze-clang-tidy: # uses cmake + make
diff --git a/.github/workflows/static-analyzer-codeql.yml b/.github/workflows/static-analyzer-codeql.yml
index 13679861..f2db4095 100644
--- a/.github/workflows/static-analyzer-codeql.yml
+++ b/.github/workflows/static-analyzer-codeql.yml
@@ -1,9 +1,12 @@
 # Copyright (C) Markus Franz Xaver Johannes Oberhumer
-name: 'Static Analyzer - CodeQL'
 
+name: 'Static Analyzer - CodeQL'
 on:
   schedule: [cron: '50 5 * * 3'] # run weekly Wednesday 05:50 UTC
   workflow_dispatch:
+env:
+  CMAKE_REQUIRED_QUIET: 0
+  DEBIAN_FRONTEND: noninteractive
 
 jobs:
   job-analyze-codeql:
diff --git a/.github/workflows/test-alpine-linux.yml b/.github/workflows/test-alpine-linux.yml
index be5d3b25..09c6a2a0 100644
--- a/.github/workflows/test-alpine-linux.yml
+++ b/.github/workflows/test-alpine-linux.yml
@@ -5,6 +5,9 @@
 
 name: 'Test - Minimal Alpine build'
 on: [workflow_dispatch]
+env:
+  CMAKE_REQUIRED_QUIET: 0
+  DEBIAN_FRONTEND: noninteractive
 
 jobs:
   job-alpine-clang: # uses cmake + make
diff --git a/.github/workflows/test-cmake-default.yml b/.github/workflows/test-cmake-default.yml
index 7574f255..bf6af485 100644
--- a/.github/workflows/test-cmake-default.yml
+++ b/.github/workflows/test-cmake-default.yml
@@ -2,8 +2,8 @@
 
 name: 'Test - CMake default build type'
 on: [workflow_dispatch]
-
 env:
+  CMAKE_REQUIRED_QUIET: 0
   DEBIAN_FRONTEND: noninteractive
 
 jobs:
diff --git a/.github/workflows/weekly-ci-alpine-linux.yml b/.github/workflows/weekly-ci-alpine-linux.yml
index 4cb88f5a..90f70922 100644
--- a/.github/workflows/weekly-ci-alpine-linux.yml
+++ b/.github/workflows/weekly-ci-alpine-linux.yml
@@ -9,10 +9,12 @@
 #   matches our minimal build requirements
 
 name: 'Weekly CI - Alpine Linux'
-
 on:
   schedule: [cron: '05 4 * * 3'] # run weekly Wednesday 04:05 UTC
   workflow_dispatch:
+env:
+  CMAKE_REQUIRED_QUIET: 0
+  DEBIAN_FRONTEND: noninteractive
 
 jobs:
   job-alpine-cmake: # uses cmake + make
diff --git a/.github/workflows/weekly-ci-cmake-macos-xcode.yml b/.github/workflows/weekly-ci-cmake-macos-xcode.yml
index 5d5ad7d4..84353195 100644
--- a/.github/workflows/weekly-ci-cmake-macos-xcode.yml
+++ b/.github/workflows/weekly-ci-cmake-macos-xcode.yml
@@ -2,10 +2,12 @@
 # build with 'cmake -G Xcode'
 
 name: 'Weekly CI - cmake macOS Xcode'
-
 on:
   schedule: [cron: '20 4 * * 3'] # run weekly Wednesday 04:20 UTC
   workflow_dispatch:
+env:
+  CMAKE_REQUIRED_QUIET: 0
+  DEBIAN_FRONTEND: noninteractive
 
 jobs:
   job-cmake-macos-xcode: # uses cmake + xcodebuild
diff --git a/.github/workflows/weekly-ci-cmake-windows-nmake.yml b/.github/workflows/weekly-ci-cmake-windows-nmake.yml
index ce953d7e..40cd0e01 100644
--- a/.github/workflows/weekly-ci-cmake-windows-nmake.yml
+++ b/.github/workflows/weekly-ci-cmake-windows-nmake.yml
@@ -2,10 +2,12 @@
 # build with 'cmake -G "NMake Makefiles"'
 
 name: 'Weekly CI - cmake Windows NMake'
-
 on:
   schedule: [cron: '30 4 * * 3'] # run weekly Wednesday 04:30 UTC
   workflow_dispatch:
+env:
+  CMAKE_REQUIRED_QUIET: 0
+  DEBIAN_FRONTEND: noninteractive
 
 jobs:
   job-cmake-windows-nmake: # uses cmake + nmake
diff --git a/.github/workflows/weekly-ci-zigcc.yml b/.github/workflows/weekly-ci-zigcc.yml
index c9acfa0d..b8482ecb 100644
--- a/.github/workflows/weekly-ci-zigcc.yml
+++ b/.github/workflows/weekly-ci-zigcc.yml
@@ -2,14 +2,14 @@
 # build with "zig cc"; see https://ziglang.org/download/
 
 name: 'Weekly CI - zigcc'
-
 on:
   schedule: [cron: '40 4 * * 3'] # run weekly Wednesday 04:40 UTC
   workflow_dispatch:
-
 env:
-  # 2023-07-05
-  ZIG_DIST_VERSION: 0.11.0-dev.3937+78eb3c561
+  CMAKE_REQUIRED_QUIET: 0
+  DEBIAN_FRONTEND: noninteractive
+  # 2023-07-15
+  ZIG_DIST_VERSION: 0.11.0-dev.4002+7dd1cf26f
 
 jobs:
   job-linux-zigcc: # uses cmake + make
diff --git a/CMakeLists.txt b/CMakeLists.txt
index cb925232..83340692 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -58,6 +58,9 @@ if(${CMAKE_VERSION} VERSION_GREATER "3.14.7")
 endif()
 if(NOT DEFINED CMAKE_REQUIRED_QUIET)
     set(CMAKE_REQUIRED_QUIET ON)
+    if("$ENV{CMAKE_REQUIRED_QUIET}" MATCHES "^(0|1|OFF|ON)$")
+        set(CMAKE_REQUIRED_QUIET "$ENV{CMAKE_REQUIRED_QUIET}")
+    endif()
 endif()
 
 # determine Git revision
@@ -125,7 +128,7 @@ endif()
 
 # set MSVC_FRONTEND
 set(MSVC_FRONTEND 0)
-if(MSVC OR ",${CMAKE_C_COMPILER_FRONTEND_VARIANT}," STREQUAL ",MSVC,")
+if(MSVC OR CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES "^MSVC")
     set(MSVC_FRONTEND 1)
 endif()
 
@@ -165,14 +168,13 @@ function(upx_add_definitions)
     endforeach()
 endfunction()
 
-if(NOT MSVC)
+if(NOT CMAKE_C_COMPILER_ID MATCHES "^MSVC")
     # use -O2 instead of -O3 to reduce code size
     string(REGEX REPLACE "(^| )-O3( |$$)" "\\1-O2\\2" a "${CMAKE_C_FLAGS_RELEASE}")
     string(REGEX REPLACE "(^| )-O3( |$$)" "\\1-O2\\2" b "${CMAKE_CXX_FLAGS_RELEASE}")
     set(CMAKE_C_FLAGS_RELEASE "${a}" CACHE STRING "Flags used by the C compiler during RELEASE builds." FORCE)
     set(CMAKE_CXX_FLAGS_RELEASE "${b}" CACHE STRING "Flags used by the CXX compiler during RELEASE builds." FORCE)
 endif()
-
 if(MSVC_FRONTEND)
     # disable silly warnings about using "deprecated" POSIX functions like fopen()
     add_definitions(-D_CRT_NONSTDC_NO_DEPRECATE)
@@ -181,19 +183,18 @@ if(MSVC_FRONTEND)
     add_definitions(-D_CRT_SECURE_NO_WARNINGS)
     # use -funsigned-char; set __cplusplus according to selected C++ standard
     add_definitions(-J -Zc:__cplusplus)
-    if(CMAKE_C_COMPILER_ID MATCHES "MSVC")
+    if(CMAKE_C_COMPILER_ID MATCHES "^MSVC")
         upx_add_definitions(-Zc:preprocessor) # use new preprocessor
-    elseif(CMAKE_C_COMPILER_ID MATCHES "Clang")
-        upx_add_definitions(-clang:-fno-strict-aliasing -clang:-fno-strict-overflow)
     endif()
-else()
+endif()
+if(NOT CMAKE_C_COMPILER_ID MATCHES "^MSVC")
     # protect against security threats caused by misguided compiler "optimizations"
     upx_add_definitions(-fno-delete-null-pointer-checks -fno-lifetime-dse)
     upx_add_definitions(-fno-strict-aliasing -fno-strict-overflow -funsigned-char)
     # disable overambitious auto-vectorization until this actually gains something
     upx_add_definitions(-fno-tree-vectorize)
     # disable annoying clang warnings which get added by the macOS Xcode cmake generator
-    if(CMAKE_C_COMPILER_ID MATCHES "Clang" AND CMAKE_GENERATOR STREQUAL "Xcode")
+    if(CMAKE_GENERATOR MATCHES "Xcode")
         upx_add_definitions(-Wno-shorten-64-to-32)
     endif()
 endif()
@@ -455,7 +456,7 @@ if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/maint/make/CMakeLists.maint.txt")
 include("${CMAKE_CURRENT_SOURCE_DIR}/maint/make/CMakeLists.maint.txt")
 endif()
 
-print_var(CMAKE_VERSION UPX_CONFIG_CMAKE_MINIMUM_REQUIRED_VERSION)
+print_var(CMAKE_VERSION UPX_CONFIG_CMAKE_MINIMUM_REQUIRED_VERSION CMAKE_GENERATOR)
 if(NOT UPX_CONFIG_CMAKE_DISABLE_PRINT_INFO)
 print_var(CMAKE_HOST_SYSTEM_NAME CMAKE_HOST_SYSTEM_VERSION)
 print_var(CMAKE_SYSTEM_NAME CMAKE_SYSTEM_VERSION CMAKE_CROSSCOMPILING)