CI: update

.github/workflows/test-alpine-linux.yml

@@ -5,6 +5,7 @@
 
 name: 'Test - Minimal Alpine build'
 on: [workflow_dispatch]
+
 jobs:
   job-alpine-clang: # uses cmake + make
     strategy: { matrix: { container: ['alpine:edge','i386/alpine:edge'] } }

.github/workflows/test-cmake-default.yml

@@ -1,7 +1,6 @@
 # Copyright (C) Markus Franz Xaver Johannes Oberhumer
 
 name: 'Test - CMake default build type'
-
 on: [workflow_dispatch]
 
 env:

.github/workflows/weekly-ci-cmake-windows-nmake.yml

@@ -9,18 +9,21 @@ on:
 
 jobs:
   job-cmake-windows-nmake: # uses cmake + nmake
-    name: ${{ format('vs{0} {1}', matrix.vsversion, matrix.arch) }}
+    name: ${{ format('vs{0} {1} {2}', matrix.vsversion, matrix.arch, matrix.clang_cl && 'clang-cl' || '') }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         include:
+          # msvc
           - { os: windows-2019, vsversion: 2019, arch: amd64 }
           - { os: windows-2019, vsversion: 2019, arch: amd64_arm64 }
           - { os: windows-2019, vsversion: 2019, arch: amd64_x86 }
           - { os: windows-2022, vsversion: 2022, arch: amd64 }
           - { os: windows-2022, vsversion: 2022, arch: amd64_arm64 }
           - { os: windows-2022, vsversion: 2022, arch: amd64_x86 }
+          # clang-cl
+          - { os: windows-2022, vsversion: 2022, arch: amd64, clang_cl: true }
     steps:
       - name: 'Check out code'
         uses: actions/checkout@v3
@@ -33,21 +36,24 @@ jobs:
       - name: 'Build cmake NMake Debug'
         shell: cmd
         run: |
-          cmake -S . -B build/debug -G "NMake Makefiles" -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_BUILD_TYPE=Debug
+          set X=${{ matrix.clang_cl && '-DCMAKE_C_COMPILER=clang-cl -DCMAKE_CXX_COMPILER=clang-cl' || '' }}
+          cmake -S . -B build/debug -G "NMake Makefiles" -DCMAKE_VERBOSE_MAKEFILE=ON -DCMAKE_BUILD_TYPE=Debug %X%
           cd build/debug
           nmake
           dir *.exe
       - name: 'Build cmake NMake Release'
         shell: cmd
         run: |
-          cmake -S . -B build/release -G "NMake Makefiles" -DCMAKE_VERBOSE_MAKEFILE=ON
+          set X=${{ matrix.clang_cl && '-DCMAKE_C_COMPILER=clang-cl -DCMAKE_CXX_COMPILER=clang-cl' || '' }}
+          cmake -S . -B build/release -G "NMake Makefiles" -DCMAKE_VERBOSE_MAKEFILE=ON %X%
           cd build/release
           nmake
           dir *.exe
       - name: 'Make artifact'
         shell: bash
         run: |
-          N=$(echo "upx-${GITHUB_REF_NAME}-${GITHUB_SHA:0:7}-weekly-ci-nmake-vs${{ matrix.vsversion }}-${{ matrix.arch }}" | sed 's/[^0-9a-zA-Z_.-]/-/g')
+          X="${{ matrix.clang_cl && '-clang-cl' || '' }}"
+          N=$(echo "upx-${GITHUB_REF_NAME}-${GITHUB_SHA:0:7}-weekly-ci-nmake-vs${{ matrix.vsversion }}-${{ matrix.arch }}$X" | sed 's/[^0-9a-zA-Z_.-]/-/g')
           mkdir -p "tmp/artifact/$N"
           (cd build && cp -ai --parents */upx.exe "../tmp/artifact/$N")
           # GitHub Actions magic: set "artifact_name" environment value for use in next step

CMakeLists.txt

@@ -56,6 +56,9 @@ if(${CMAKE_VERSION} VERSION_GREATER "3.14.7")
     set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded")
     cmake_policy(SET CMP0091 NEW)
 endif()
+if(NOT DEFINED CMAKE_REQUIRED_QUIET)
+    set(CMAKE_REQUIRED_QUIET ON)
+endif()
 
 # determine Git revision
 set(GITREV_SHORT "")
@@ -131,10 +134,6 @@ endif()
 #***********************************************************************
 
 include(CheckCCompilerFlag)
-if(CMAKE_C_COMPILER_ID MATCHES "Clang|GNU")
-    check_c_compiler_flag(-fno-delete-null-pointer-checks HAVE_CFLAG_FNO_DELETE_NULL_POINTER_CHECKS)
-    check_c_compiler_flag(-fno-lifetime-dse HAVE_CFLAG_FNO_LIFETIME_DSE)
-endif()
 
 if(UPX_CONFIG_DISABLE_WSTRICT)
     # enable all basic warnings
@@ -155,6 +154,17 @@ else()
     set(warn_WX -WX)
 endif()
 
+function(upx_add_definitions)
+    foreach(flag ${ARGV})
+        string(REGEX REPLACE "[^0-9a-zA-Z_]" "_" cache_var "HAVE_CFLAG_${flag}")
+        check_c_compiler_flag("${flag}" ${cache_var})
+        if(${cache_var})
+            #message(STATUS "add_definitions: ${flag}")
+            add_definitions("${flag}")
+        endif()
+    endforeach()
+endfunction()
+
 if(NOT MSVC)
     # use -O2 instead of -O3 to reduce code size
     string(REGEX REPLACE "(^| )-O3( |$$)" "\\1-O2\\2" a "${CMAKE_C_FLAGS_RELEASE}")
@@ -169,22 +179,22 @@ if(MSVC_FRONTEND)
     add_definitions(-D_CRT_NONSTDC_NO_WARNINGS)
     add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
     add_definitions(-D_CRT_SECURE_NO_WARNINGS)
-    # use -funsigned-char; set __cplusplus according to selected C++ standard; use new preprocessor
+    # use -funsigned-char; set __cplusplus according to selected C++ standard
-    add_definitions(-J -Zc:__cplusplus -Zc:preprocessor)
+    add_definitions(-J -Zc:__cplusplus)
+    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()
     # protect against security threats caused by misguided compiler "optimizations"
-    if(HAVE_CFLAG_FNO_DELETE_NULL_POINTER_CHECKS)
+    upx_add_definitions(-fno-delete-null-pointer-checks -fno-lifetime-dse)
-        add_definitions(-fno-delete-null-pointer-checks)
+    upx_add_definitions(-fno-strict-aliasing -fno-strict-overflow -funsigned-char)
-    endif()
-    if(HAVE_CFLAG_FNO_LIFETIME_DSE)
-        add_definitions(-fno-lifetime-dse)
-    endif()
-    add_definitions(-fno-strict-aliasing -fno-strict-overflow -funsigned-char)
     # disable overambitious auto-vectorization until this actually gains something
-    add_definitions(-fno-tree-vectorize)
+    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")
-        add_definitions(-Wno-shorten-64-to-32)
+        upx_add_definitions(-Wno-shorten-64-to-32)
     endif()
 endif()
 
@@ -451,6 +461,7 @@ print_var(CMAKE_HOST_SYSTEM_NAME CMAKE_HOST_SYSTEM_VERSION)
 print_var(CMAKE_SYSTEM_NAME CMAKE_SYSTEM_VERSION CMAKE_CROSSCOMPILING)
 print_var(CMAKE_C_COMPILER_ID CMAKE_C_COMPILER_VERSION CMAKE_C_COMPILER_FRONTEND_VARIANT CMAKE_C_COMPILER_ARCHITECTURE_ID CMAKE_C_PLATFORM_ID CMAKE_C_COMPILER_ABI)
 print_var(CMAKE_CXX_COMPILER_ID CMAKE_CXX_COMPILER_VERSION CMAKE_CXX_COMPILER_FRONTEND_VARIANT CMAKE_CXX_COMPILER_ARCHITECTURE_ID CMAKE_CXX_PLATFORM_ID CMAKE_CXX_COMPILER_ABI)
+print_var(CYGWIN GNUC MINGW MSVC MSVC_FRONTEND MSVC_IDE WIN32 WIN64)
 endif() # UPX_CONFIG_CMAKE_DISABLE_PRINT_INFO
 print_var(CMAKE_INSTALL_PREFIX CMAKE_CONFIGURATION_TYPES CMAKE_BUILD_TYPE)
 if(CMAKE_BUILD_TYPE AND NOT CMAKE_BUILD_TYPE MATCHES "^(Debug|None|Release)$")