CI: add minimal-ci

.github/workflows/minimal-ci.yml

@@ -0,0 +1,28 @@
+# minimal GitHub CI building UPX with clang and gcc in an Alpine Linux container
+
+name: 'Minimal CI with Alpine Linux'
+
+on: { workflow_dispatch: }
+jobs:
+  job-alpine-cmake:
+    strategy: {matrix: {container: ['alpine:3.12','alpine:3.17','alpine:edge']}}
+    name: ${{ format('container {0}', matrix.container) }}
+    runs-on: ubuntu-latest
+    container: ${{ matrix.container }}
+    steps:
+      - name: ${{ format('Install packages {0}', matrix.container) }}
+        run: 'apk update && apk upgrade && apk add bash clang cmake g++ git make'
+      - name: 'Check out code'
+        run: |
+          git clone --branch devel --depth 1 https://github.com/upx/upx
+          git -C upx submodule update --init
+          echo 'artifact_name=upx-minimal-ci-${{ matrix.container }}' | sed 's/:/-/g' >> $GITHUB_ENV
+      - { name: 'Build clang', run: 'make -C upx build/extra/clang/release' }
+      - { name: 'Build gcc',   run: 'make -C upx build/extra/gcc/release' }
+      - name: ${{ format('Upload artifact {0}', env.artifact_name) }}
+        uses: actions/upload-artifact@v3
+        with:
+          name: ${{ env.artifact_name }}
+          path: 'upx*/build/*/*/*/upx'
+      - { name: 'Run basic tests clang', run: 'make -C upx/build/extra/clang/release test' }
+      - { name: 'Run basic tests gcc',   run: 'make -C upx/build/extra/gcc/release test' }

CMakeLists.txt

@@ -8,7 +8,7 @@ if(NOT IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/.git")
     option(UPX_CONFIG_DISABLE_WERROR   "Do not compile with default -Werror option."   ON)
 else()
     # strict config defaults for devel builds
-    message(STATUS "upx info: strict config defaults enabled")
+    message(STATUS "===== UPX info: strict config defaults enabled")
     option(UPX_CONFIG_DISABLE_GITREV   "Do not compile with default Git version info." OFF)
     option(UPX_CONFIG_DISABLE_SANITIZE "Do not compile with default sanitize options." OFF)
     option(UPX_CONFIG_DISABLE_WERROR   "Do not compile with default -Werror option."   OFF)
@@ -78,6 +78,7 @@ else()
     message(STATUS "UPX_VERSION_GITREV: not set")
 endif()
 
+# CMake init
 project(upx VERSION 4.0.2 LANGUAGES C CXX)
 
 # set default build type to "Release"
@@ -159,7 +160,7 @@ else()
     add_definitions(-fno-tree-vectorize)
 endif()
 
-# compile a target with -O2 in Debug mode
+# compile a target with -O2 in Debug build
 function(upx_compile_target_debug_with_O2 t)
     if(MSVC)
         # msvc uses some Debug compile options like -RTC1 that are incompatible with -O2
@@ -244,7 +245,9 @@ if(Threads_FOUND AND 0)
 endif()
 
 #***********************************************************************
+# "ctest"
 # "make test"
+# "ninja test"
 #***********************************************************************
 
 include(CTest)
@@ -277,8 +280,9 @@ if(NOT CMAKE_CROSSCOMPILING AND NOT UPX_CONFIG_DISABLE_SELF_PACK_TEST)
 endif()
 
 #***********************************************************************
-# "make install"
 # "cmake --install ."
+# "make install"
+# "ninja install"
 #***********************************************************************
 
 # installation prefix and directories
@@ -314,13 +318,10 @@ function(print_var)
     endforeach()
 endfunction()
 print_var(CMAKE_HOST_SYSTEM_NAME CMAKE_HOST_SYSTEM_VERSION)
-print_var(CMAKE_SYSTEM_NAME CMAKE_SYSTEM_VERSION)
-print_var(CMAKE_CROSSCOMPILING)
+print_var(CMAKE_SYSTEM_NAME CMAKE_SYSTEM_VERSION CMAKE_CROSSCOMPILING)
 print_var(CMAKE_C_COMPILER_ID CMAKE_C_COMPILER_VERSION 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_ARCHITECTURE_ID CMAKE_CXX_PLATFORM_ID CMAKE_CXX_COMPILER_ABI)
-print_var(CMAKE_INSTALL_PREFIX)
-print_var(CMAKE_CONFIGURATION_TYPES)
-print_var(CMAKE_BUILD_TYPE)
+print_var(CMAKE_INSTALL_PREFIX CMAKE_CONFIGURATION_TYPES CMAKE_BUILD_TYPE)
 if (CMAKE_BUILD_TYPE AND NOT CMAKE_BUILD_TYPE MATCHES "^(Debug|Release)$")
     message(WARNING "WARNING: unsupported CMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}; please use \"Debug\" or \"Release\"")
 endif()

Makefile

@@ -15,6 +15,8 @@ UPX_CMAKE_BUILD_FLAGS += --parallel
 ifneq ($(VERBOSE),)
   UPX_CMAKE_BUILD_FLAGS += --verbose
 endif
+# enable this if you prefer Ninja for the actual builds:
+#UPX_CMAKE_CONFIG_FLAGS += -G Ninja
 
 #***********************************************************************
 # default
@@ -132,27 +134,7 @@ build/extra/cross-windows-mingw64/%: UPX_CMAKE_CONFIG_FLAGS += -DUPX_CONFIG_DISA
 # check git submodules
 #***********************************************************************
 
-ifeq ($(wildcard ./vendor/boost-pfr/include/.),)
-  $(error ERROR: missing git submodule; run 'git submodule update --init')
-endif
-ifeq ($(wildcard ./vendor/doctest/doctest/.),)
-  $(error ERROR: missing git submodule; run 'git submodule update --init')
-endif
-ifeq ($(wildcard ./vendor/lzma-sdk/C/.),)
-  $(error ERROR: missing git submodule; run 'git submodule update --init')
-endif
-ifeq ($(wildcard ./vendor/rangeless/include/.),)
-  $(error ERROR: missing git submodule; run 'git submodule update --init')
-endif
-ifeq ($(wildcard ./vendor/ucl/include/.),)
-  $(error ERROR: missing git submodule; run 'git submodule update --init')
-endif
-ifeq ($(wildcard ./vendor/valgrind/include/.),)
-  $(error ERROR: missing git submodule; run 'git submodule update --init')
-endif
-ifeq ($(wildcard ./vendor/zlib/crc32.c),)
-  $(error ERROR: missing git submodule; run 'git submodule update --init')
-endif
-ifeq ($(wildcard ./vendor/zstd/lib/.),)
-  $(error ERROR: missing git submodule; run 'git submodule update --init')
-endif
+SUBMODULES = boost-pfr doctest lzma-sdk rangeless ucl valgrind zlib zstd
+
+dummy := $(foreach m,$(SUBMODULES),$(if $(wildcard vendor/$(m)/[CL]*),,\
+    $(error ERROR: missing git submodule $m; run 'git submodule update --init')))