CMake: Add basic CMake build system

Introduce an initial CMake buildsystem. This build system can build
a fully working apt system without translation or documentation.

The FindBerkelyDB module is from kdelibs, with some small adjustements
to also look in db5 directories.

Initial work on this CMake build system started in 2009, and was
resumed in August 2016.

1 files changed, 132 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 000000000..90e5272c9
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,132 @@
+# Copyright (C) 2009, 2016 Julian Andres Klode <jak@debian.org>.
+# Licensed under the same terms as APT; i.e. GPL 2 or later.
+
+# set minimum version
+project(apt)
+cmake_minimum_required(VERSION 3.3.0)
+
+option(WITH_DOC "Build documentation." OFF)
+option(USE_NLS "Localisation support." ON)
+
+set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/CMake")
+
+# Work around bug in GNUInstallDirs
+if (EXISTS "/etc/debian_version")
+  set(CMAKE_INSTALL_LIBEXECDIR "lib")
+endif()
+
+# Include stuff
+include(Misc)
+include(CheckIncludeFiles)
+include(CheckFunctionExists)
+include(CheckStructHasMember)
+include(GNUInstallDirs)
+include(TestBigEndian)
+find_package(Threads)
+find_package(PkgConfig)
+
+# Set compiler flags
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)
+
+add_optional_compile_options(Wall)
+add_optional_compile_options(Wextra)
+add_optional_compile_options(Wcast-align)
+add_optional_compile_options(Wlogical-op)
+add_optional_compile_options(Wredundant-decls)
+add_optional_compile_options(Wmissing-declarations)
+add_optional_compile_options(Wunsafe-loop-optimizations)
+add_optional_compile_options(Wctor-dtor-privacy)
+add_optional_compile_options(Wdisabled-optimization)
+add_optional_compile_options(Winit-self)
+add_optional_compile_options(Wmissing-include-dirs)
+add_optional_compile_options(Wnoexcept)
+add_optional_compile_options(Wsign-promo)
+add_optional_compile_options(Wundef)
+
+# apt-ftparchive dependencies
+find_package(BerkeleyDB REQUIRED)
+if (BERKELEY_DB_FOUND)
+  set(HAVE_BDB 1)
+endif()
+
+
+# apt-transport-https dependencies
+pkg_check_modules(CURL libcurl REQUIRED)
+if (CURL_FOUND)
+  set(HAVE_CURL 1)
+endif()
+
+# (De)Compressor libraries
+find_package(ZLIB REQUIRED)
+if (ZLIB_FOUND)
+  set(HAVE_ZLIB 1)
+endif()
+
+
+find_package(BZip2)
+if (BZIP2_FOUND)
+  set(HAVE_BZ2 1)
+endif()
+
+pkg_check_modules(LZMA liblzma)
+if (LZMA_FOUND)
+  set(HAVE_LZMA 1)
+endif()
+
+pkg_check_modules(LZ4 liblz4)
+if (LZ4_FOUND)
+  set(HAVE_LZ4 1)
+endif()
+
+# Mount()ing and stat()ing and friends
+
+check_function_exists(statvfs HAVE_STATVFS)
+if (NOT HAVE_STATVFS)
+  check_symbol_exists(statfs sys/vfs.h HAVE_VFS_H)
+  check_symbol_exists(statfs sys/mount.h HAVE_MOUNT_H)
+  if (NOT HAVE_VFS_H AND NOT HAVE_MOUNT_H)
+    message(FATAL_ERROR "Can find neither statvfs() nor statfs()")
+  endif()
+  configure_file(buildlib/statvfs.h.in ${PROJECT_BINARY_DIR}/include/statvfs.h @ONLY)
+endif()
+
+CHECK_STRUCT_HAS_MEMBER("struct statfs" f_type sys/vfs.h HAVE_STRUCT_STATFS_F_TYPE)
+
+# Other checks
+check_function_exists(getresuid HAVE_GETRESUID)
+check_function_exists(getresgid HAVE_GETRESGID)
+check_function_exists(setresuid HAVE_SETRESUID)
+check_function_exists(setresgid HAVE_SETRESGID)
+check_function_exists(timegm HAVE_TIMEGM)
+test_big_endian(WORDS_BIGENDIAN)
+
+if (CMAKE_USE_PTHREADS_INIT)
+  set(HAVE_PTHREAD 1)
+endif()
+
+# Configure some variables like package, version and architecture.
+set(PACKAGE "apt")
+
+execute_process(COMMAND dpkg-parsechangelog -SVersion -l${PROJECT_SOURCE_DIR}/debian/changelog
+                OUTPUT_VARIABLE PACKAGE_VERSION OUTPUT_STRIP_TRAILING_WHITESPACE)
+execute_process(COMMAND dpkg-architecture -qDEB_HOST_ARCH
+                OUTPUT_VARIABLE COMMON_ARCH OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+# Configure our configuration headers (config.h and apti18n.h)
+configure_file(CMake/config.h.in ${PROJECT_BINARY_DIR}/include/config.h)
+configure_file(CMake/apti18n.h.in ${PROJECT_BINARY_DIR}/include/apti18n.h)
+
+# Generic header locations
+include_directories(${PROJECT_BINARY_DIR}/include)
+
+# Add our subdirectories
+add_subdirectory(vendor)
+add_subdirectory(apt-pkg)
+add_subdirectory(apt-private)
+add_subdirectory(apt-inst)
+add_subdirectory(cmdline)
+add_subdirectory(dselect)
+add_subdirectory(ftparchive)
+add_subdirectory(methods)