Initial support for Windows build

build/meson/meson.build

@@ -10,7 +10,7 @@
 
 project('zstd',
     ['c', 'cpp'],
-    license: 'BSD',
+    license: ['BSD', 'GPLv2'],
     default_options : ['c_std=c99',
         'cpp_std=c++11',
         'buildtype=release'],
@@ -22,36 +22,65 @@ cc = meson.get_compiler('c')
 cxx = meson.get_compiler('cpp')
 pkgconfig = import('pkgconfig')
 python3 = import('python').find_installation()
+windows_mod = import('windows')
+
+host_machine_os = host_machine.system()
+os_windows = 'windows'
+os_linux = 'linux'
+os_darwin = 'darwin'
+os_freebsd = 'freebsd'
+os_sun = 'sunos'
+
+cc_id = cc.get_id()
+compiler_gcc = 'gcc'
+compiler_clang = 'clang'
+compiler_msvc = 'msvc'
 
 zstd_version = meson.project_version()
+zstd_libversion = ''
 
 # =============================================================================
 # Project directories
 # =============================================================================
 
-zstd_prefix = get_option('prefix')
-zstd_bindir = join_paths(zstd_prefix, get_option('bindir'))
-zstd_datadir = join_paths(zstd_prefix, get_option('datadir'))
-zstd_docdir = join_paths(zstd_datadir, 'doc', meson.project_name())
-zstd_mandir = join_paths(zstd_prefix, get_option('mandir'))
+zstd_rootdir = '../..'
 
-zstd_source_dir = join_paths('..', '..')
-library_dir = join_paths(zstd_source_dir, 'lib')
-contrib_meson_dir = join_paths(zstd_source_dir, 'contrib', 'meson')
+# =============================================================================
+# Installing directories
+# =============================================================================
+
+if host_machine_os == os_windows
+    zstd_prefix = '.'
+    zstd_bindir = 'bin'
+    zstd_datadir = 'share'
+    zstd_mandir = join_paths(zstd_datadir, 'man')
+else
+    zstd_prefix = get_option('prefix')
+    zstd_bindir = join_paths(zstd_prefix, get_option('bindir'))
+    zstd_datadir = join_paths(zstd_prefix, get_option('datadir'))
+    zstd_mandir = join_paths(zstd_prefix, get_option('mandir'))
+endif
+
+zstd_docdir = join_paths(zstd_datadir, 'doc', meson.project_name())
 
 # =============================================================================
 # Project options
 # =============================================================================
 
 enable_debug = get_option('debug')
+default_library_type = get_option('default_library')
+meson_buildtype = get_option('buildtype')
 with_legacy_support = get_option('with-legacy-support')
 with_programs = get_option('with-programs')
 with_tests = get_option('with-tests')
 with_contrib = get_option('with-contrib')
+with_debug_level = get_option('with-debug-level')
 enable_multithread = get_option('enable-multithread')
+enable_static_runtime = get_option('enable-static-runtime')
 enable_zlib = get_option('enable-zlib')
 enable_lzma = get_option('enable-lzma')
 enable_lz4 = get_option('enable-lz4')
+enable_backtrace = get_option('enable-backtrace')
 
 # =============================================================================
 # Helper scripts for Meson
@@ -63,7 +92,7 @@ GetZstdLibraryVersion_py = files('GetZstdLibraryVersion.py')
 # Getting project version from zstd.h
 # =============================================================================
 
-zstd_h_file = join_paths(meson.current_source_dir(), library_dir, 'zstd.h')
+zstd_h_file = join_paths(meson.current_source_dir(), zstd_rootdir, 'lib/zstd.h')
 r = run_command(python3, GetZstdLibraryVersion_py, zstd_h_file)
 if r.returncode() == 0
     output = r.stdout().strip()
@@ -73,31 +102,42 @@ if r.returncode() == 0
     endif
 endif
 
+if host_machine_os != os_windows
+    zstd_libversion = zstd_version
+endif
+
 # =============================================================================
 # Dependencies
 # =============================================================================
 
-libm_dep = cc.find_library('m', required: true)
-thread_dep = dependency('threads', required: false)
+libm_dep = cc.find_library('m', required: with_tests)
+thread_dep = dependency('threads', required: enable_multithread)
 # Arguments in dependency should be equivalent to those passed to pkg-config
-zlib_dep = dependency('zlib', required: false)
-lzma_dep = dependency('liblzma', required: false)
-lz4_dep = dependency('liblz4', required: false)
+zlib_dep = dependency('zlib', required: enable_zlib)
+lzma_dep = dependency('liblzma', required: enable_lzma)
+lz4_dep = dependency('liblz4', required: enable_lz4)
 
 # =============================================================================
 # Compiler flags
 # =============================================================================
 
-if cxx.get_id() == 'gcc' or cxx.get_id() == 'clang'
-    common_flags = [ '-DXXH_NAMESPACE=ZSTD_' ]
+add_project_arguments('-DXXH_NAMESPACE=ZSTD_', language: [ 'c' ])
+
+if [compiler_gcc, compiler_clang].contains(cc_id)
     common_warning_flags = [ '-Wextra', '-Wundef', '-Wshadow', '-Wcast-align', '-Wcast-qual' ]
-    cc_compilation_flags = cc.get_supported_arguments(common_warning_flags)
-    cc_compilation_flags += cc.get_supported_arguments(['-Wstrict-prototypes'])
-    cc_compilation_flags += common_flags
-    cxx_compilation_flags = cxx.get_supported_arguments(common_warning_flags)
-    cxx_compilation_flags += common_flags
-    add_project_arguments(cc_compilation_flags, language : 'c')
-    add_project_arguments(cxx_compilation_flags, language : 'cpp')
+    cc_compile_flags = cc.get_supported_arguments(common_warning_flags + [ '-Wstrict-prototypes' ])
+    cxx_compile_flags = cxx.get_supported_arguments(common_warning_flags)
+    add_project_arguments(cc_compile_flags, language : 'c')
+    add_project_arguments(cxx_compile_flags, language : 'cpp')
+elif cc_id == compiler_msvc
+    msvc_compile_flags = [ '/D_UNICODE', '/DUNICODE' ]
+    if enable_multithread
+        msvc_compile_flags += [ '/MP' ]
+    endif
+    if enable_static_runtime
+        msvc_compile_flags += [ '/MT' ]
+    endif
+    add_project_arguments(msvc_compile_flags, language: ['c', 'cpp'])
 endif
 
 # =============================================================================