Add a CMake build alongside autotools

.github/workflows/build-centos8.yml

@@ -9,7 +9,7 @@ jobs:
 
     steps:
       - name: Set up Git repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
       - name: Build LTFS

.github/workflows/build-debian11.yml

@@ -9,7 +9,7 @@ jobs:
 
     steps:
       - name: Set up Git repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
       - name: Build LTFS

.github/workflows/build-debian12.yml

@@ -9,7 +9,7 @@ jobs:
 
     steps:
       - name: Set up Git repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
       - name: Build LTFS

.github/workflows/build-fedora28.yml

@@ -9,7 +9,7 @@ jobs:
 
     steps:
       - name: Set up Git repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
       - name: Build LTFS

.github/workflows/build-ubuntu-bionic.yml

@@ -9,7 +9,7 @@ jobs:
 
     steps:
       - name: Set up Git repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
       - name: Build LTFS

.github/workflows/build-ubuntu-focal.yml

@@ -9,7 +9,7 @@ jobs:
 
     steps:
       - name: Set up Git repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
       - name: Build LTFS

.github/workflows/build-ubuntu-xeneal.yml

@@ -9,7 +9,7 @@ jobs:
 
     steps:
       - name: Set up Git repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
       - name: Build LTFS

.github/workflows/cmake.yml

@@ -0,0 +1,30 @@
+name: CMake Build
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    name: Build and test with CMake
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Set up Git repository
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get -q update
+          sudo apt-get -q -y install --no-install-recommends \
+            build-essential cmake pkg-config \
+            icu-devtools libicu-dev libxml2-dev uuid-dev libsnmp-dev \
+            libfuse-dev attr
+
+      - name: Build
+        run: |
+          cmake -S . -B build
+          cmake --build build -j"$(nproc)"
+
+      - name: Run tests
+        run: ctest --test-dir build --output-on-failure

.github/workflows/codeql-analysis.yml

@@ -39,13 +39,13 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         submodules: recursive
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
+      uses: github/codeql-action/init@v4
       with:
         languages: ${{ matrix.language }}
         # If you wish to specify custom queries, you can do so here or in a config file.
@@ -56,7 +56,7 @@ jobs:
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     #- name: Autobuild
-    #  uses: github/codeql-action/autobuild@v2
+    #  uses: github/codeql-action/autobuild@v4
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 https://git.io/JvXDl
@@ -75,4 +75,4 @@ jobs:
        make
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      uses: github/codeql-action/analyze@v4

.github/workflows/update-uthash.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           submodules: recursive
           token: ${{ secrets.GITHUB_TOKEN }}
@@ -36,7 +36,7 @@ jobs:
 
       - name: Create Pull Request
         if: steps.check_changes.outputs.changed == 'true'
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v8
         with:
           commit-message: 'chore: update uthash.h from upstream'
           title: 'chore: update uthash.h from upstream'

.gitignore

@@ -4,7 +4,7 @@ aclocal.m4
 autom4te.cache/
 build-aux/
 m4/
-config.h.in
+/config.h.in
 configure
 # Files generated by ./configure
 config.h

CMakeLists.txt

@@ -0,0 +1,235 @@
+#
+# CMake build for LTFS. Coexists with the autotools build; both are
+# maintained. The package version is read from the top-level VERSION file
+# (the single source of truth shared with configure.ac).
+#
+cmake_minimum_required(VERSION 3.18)
+
+# --- Version (single source of truth: ./VERSION) -----------------------------
+file(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/VERSION" _ltfs_ver_lines)
+list(GET _ltfs_ver_lines 0 LTFS_VERSION_NUM)
+list(LENGTH _ltfs_ver_lines _ltfs_ver_n)
+set(LTFS_VERSION_SUFFIX "")
+if(_ltfs_ver_n GREATER 1)
+    list(GET _ltfs_ver_lines 1 LTFS_VERSION_SUFFIX)
+endif()
+if(LTFS_VERSION_SUFFIX STREQUAL "")
+    set(LTFS_VERSION_FULL "${LTFS_VERSION_NUM}")
+else()
+    set(LTFS_VERSION_FULL "${LTFS_VERSION_NUM} ${LTFS_VERSION_SUFFIX}")
+endif()
+
+project(ltfs VERSION ${LTFS_VERSION_NUM} LANGUAGES C)
+
+set(LTFS_PACKAGE_NAME "LTFS")
+set(LTFS_PACKAGE_TARNAME "ltfs")
+set(LTFS_BUGREPORT "IBM corporation.")
+
+set(CMAKE_C_STANDARD 99)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+    set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "" FORCE)
+endif()
+
+include(GNUInstallDirs)
+include(CheckIncludeFile)
+include(CheckSymbolExists)
+include(CheckTypeSize)
+include(CheckCCompilerFlag)
+
+# --- Options (mirror the autotools --enable/--with switches) ------------------
+option(LTFS_ENABLE_SNMP "Build with SNMP support" ON)
+option(LTFS_ENABLE_LINTAPE "Build the IBM lin_tape backend (Linux only)" OFF)
+option(LTFS_SUPPORT_BUGGY_IFS "Work around buggy tape interfaces" OFF)
+option(LTFS_LIVELINK "Enable livelink symlink mode" ON)
+option(LTFS_MESSAGE_CHECK "Compile in message-checking mode" OFF)
+option(LTFS_WERROR "Treat warnings as errors" OFF)
+option(LTFS_DEBUG "Compile with extra debugging output" OFF)
+
+# New locking defaults ON for NetBSD (its old locking is broken), OFF elsewhere.
+if(CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
+    option(LTFS_NEW_LOCKING "Use the new locking implementation" ON)
+else()
+    option(LTFS_NEW_LOCKING "Use the new locking implementation" OFF)
+endif()
+
+# Default plugin selection, matching configure.ac.
+if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+    set(_default_tape "sg")
+elseif(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+    set(_default_tape "iokit")
+elseif(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+    set(_default_tape "cam")
+elseif(CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
+    set(_default_tape "scsipi-ibmtape")
+endif()
+set(DEFAULT_TAPE "${_default_tape}" CACHE STRING "Default tape backend plugin")
+set(DEFAULT_IOSCHED "unified" CACHE STRING "Default I/O scheduler plugin")
+set(DEFAULT_KMI "none" CACHE STRING "Default key manager plugin")
+
+# --- Dependencies ------------------------------------------------------------
+# find_package is used wherever a CMake package exists (LibXml2, ICU, Threads).
+# libfuse, libuuid, and net-snmp ship no CMake config; pkg-config is their
+# canonical interface, wrapped as IMPORTED_TARGETs (PkgConfig::*).
+find_package(PkgConfig REQUIRED)
+
+pkg_check_modules(FUSE REQUIRED IMPORTED_TARGET fuse>=2.6.0)
+
+find_package(LibXml2 2.6.16 REQUIRED)
+
+if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+    pkg_check_modules(UUID REQUIRED IMPORTED_TARGET uuid>=1.6)
+else()
+    pkg_check_modules(UUID REQUIRED IMPORTED_TARGET uuid>=1.36)
+endif()
+
+# ICU via the CMake module (replaces the removed icu-config).
+find_package(ICU REQUIRED COMPONENTS uc i18n io data)
+set(LTFS_ICU6X OFF)
+if(ICU_VERSION VERSION_GREATER_EQUAL "60")
+    set(LTFS_ICU6X ON)
+endif()
+
+find_package(Threads REQUIRED)
+if(NOT CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+    find_library(RT_LIBRARY rt)
+endif()
+
+# SNMP (optional).
+if(LTFS_ENABLE_SNMP)
+    pkg_check_modules(NETSNMP IMPORTED_TARGET net-snmp>=5.3)
+    if(NOT NETSNMP_FOUND)
+        message(WARNING "net-snmp not found via pkg-config; disabling SNMP")
+        set(LTFS_ENABLE_SNMP OFF)
+    endif()
+endif()
+
+# Platform-specific libraries (declared for all platforms; used where built).
+# backtrace() has a CMake module (libc on glibc, libexecinfo on the BSDs);
+# cam/bsdxml/mt and the Apple frameworks ship neither CMake configs nor
+# pkg-config files, so find_library is the canonical way to locate them.
+if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+    find_library(CAM_LIBRARY cam REQUIRED)
+    find_library(BSDXML_LIBRARY bsdxml REQUIRED)
+    find_library(MT_LIBRARY mt REQUIRED)
+    find_package(Backtrace REQUIRED)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
+    find_package(Backtrace REQUIRED)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+    find_library(IOKIT_FRAMEWORK IOKit REQUIRED)
+    find_library(COREFOUNDATION_FRAMEWORK CoreFoundation REQUIRED)
+endif()
+
+# ICU host tools for the message bundles.
+find_program(GENRB genrb REQUIRED)
+find_program(PKGDATA pkgdata REQUIRED)
+
+# --- Feature checks for config.h ---------------------------------------------
+check_include_file("sys/sysctl.h" HAVE_SYS_SYSCTL_H)
+check_include_file("fcntl.h"      HAVE_FCNTL_H)
+check_include_file("limits.h"     HAVE_LIMITS_H)
+check_include_file("stddef.h"     HAVE_STDDEF_H)
+check_include_file("stdint.h"     HAVE_STDINT_H)
+check_include_file("stdlib.h"     HAVE_STDLIB_H)
+check_include_file("string.h"     HAVE_STRING_H)
+check_include_file("sys/ioctl.h"  HAVE_SYS_IOCTL_H)
+check_include_file("sys/mount.h"  HAVE_SYS_MOUNT_H)
+check_include_file("sys/time.h"   HAVE_SYS_TIME_H)
+check_include_file("termios.h"    HAVE_TERMIOS_H)
+check_include_file("unistd.h"     HAVE_UNISTD_H)
+check_type_size("time_t" SIZEOF_TIME_T)
+
+# xmlTextReaderSetup and XML_PARSE_HUGE (need libxml2 flags in scope).
+# XML_PARSE_HUGE is an enumerator, not a macro, so it needs a compile test.
+include(CheckCSourceCompiles)
+set(CMAKE_REQUIRED_INCLUDES ${LIBXML2_INCLUDE_DIRS})
+set(CMAKE_REQUIRED_LIBRARIES ${LIBXML2_LIBRARIES})
+check_symbol_exists(xmlTextReaderSetup "libxml/xmlreader.h" HAVE_XML_READER_SETUP)
+check_c_source_compiles("
+#include <libxml/parser.h>
+int main(void) { int foo = XML_PARSE_HUGE; (void)foo; return 0; }"
+    HAVE_XML_PARSE_HUGE)
+unset(CMAKE_REQUIRED_INCLUDES)
+unset(CMAKE_REQUIRED_LIBRARIES)
+
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmake/config.h.in
+               ${CMAKE_CURRENT_BINARY_DIR}/config.h @ONLY)
+
+# --- Common compile settings -------------------------------------------------
+# Definitions every translation unit gets, mirroring AM_CPPFLAGS/AM_CFLAGS.
+add_compile_definitions(
+    _GNU_SOURCE
+    LTFS_CONFIG_FILE="${CMAKE_INSTALL_FULL_SYSCONFDIR}/ltfs.conf"
+    LTFS_BASE_DIR="${CMAKE_INSTALL_PREFIX}"
+)
+if(LTFS_ENABLE_SNMP)
+    add_compile_definitions(ENABLE_SNMP)
+endif()
+if(LTFS_NEW_LOCKING)
+    add_compile_definitions(USE_NEW_LOCKING)
+endif()
+if(NOT LTFS_LIVELINK)
+    add_compile_definitions(POSIXLINK_ONLY)
+endif()
+if(LTFS_MESSAGE_CHECK)
+    add_compile_definitions(MSG_CHECK)
+endif()
+if(LTFS_DEBUG)
+    add_compile_definitions(DEBUG TRACE)
+endif()
+if(LTFS_ICU6X)
+    add_compile_definitions(ICU6x)
+endif()
+if(LTFS_SUPPORT_BUGGY_IFS AND (CMAKE_SYSTEM_NAME STREQUAL "Linux" OR CMAKE_SYSTEM_NAME STREQUAL "Darwin"))
+    add_compile_definitions(SUPPORT_BUGGY_IFS)
+endif()
+
+# -Wno-unused-parameter: callback signatures (FUSE operations, plugin ops)
+# must keep parameters they do not use.
+# -Wno-missing-field-initializers: designated initializers of operation and
+# option tables intentionally leave the remaining members zeroed.
+add_compile_options(-Wall -Wextra -Wno-unused-parameter
+                    -Wno-missing-field-initializers -Wsign-compare -fsigned-char)
+if(LTFS_WERROR)
+    add_compile_options(-Werror -Wno-deprecated-declarations)
+endif()
+
+# config.h (binary dir) and the src tree on the include path for every target.
+include_directories(${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/src)
+
+# CRC files need SSE4.2 on capable x86; detected once, applied to the ltfs_crc
+# object library (see src/tape_drivers).
+set(LTFS_CRC_OPTIONS "")
+if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64|i[3-6]86")
+    check_c_compiler_flag("-msse4.2" LTFS_HAVE_MSSE42)
+    if(LTFS_HAVE_MSSE42)
+        set(LTFS_CRC_OPTIONS -msse4.2 -D__SSE42__)
+    endif()
+endif()
+
+# Helper modules.
+list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+include(LtfsMessages)
+include(LtfsPlugin)
+
+enable_testing()
+
+# --- Subprojects -------------------------------------------------------------
+add_subdirectory(messages)
+add_subdirectory(src)
+add_subdirectory(conf)
+add_subdirectory(man)
+add_subdirectory(init.d)
+add_subdirectory(tests)
+
+# pkg-config file (reuse the autotools template).
+set(prefix "${CMAKE_INSTALL_PREFIX}")
+set(exec_prefix "\${prefix}")
+set(libdir "${CMAKE_INSTALL_FULL_LIBDIR}")
+set(includedir "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
+set(PACKAGE "ltfs")
+set(VERSION "${LTFS_VERSION_FULL}")
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/ltfs.pc.in
+               ${CMAKE_CURRENT_BINARY_DIR}/ltfs.pc @ONLY)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/ltfs.pc
+        DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)

VERSION

@@ -0,0 +1,2 @@
+2.4.5.1
+(Prelim)