Blame meson.build

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project('gdk-pixbuf', 'c',
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        version: '2.36.10',
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        license: 'LGPLv2.1+',
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        default_options: [
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          'buildtype=debugoptimized',
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          'warning_level=1',
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          'c_std=c99',
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        ],
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        meson_version: '>= 0.40.1')
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add_project_arguments([ '-D_POSIX_C_SOURCE', '-D_DEFAULT_SOURCE' ], language: 'c')
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cc = meson.get_compiler('c')
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host_system = host_machine.system()
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# Versioning
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gdk_pixbuf_version = meson.project_version()
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version_arr = gdk_pixbuf_version.split('.')
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gdk_pixbuf_version_major = version_arr[0].to_int()
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gdk_pixbuf_version_minor = version_arr[1].to_int()
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gdk_pixbuf_version_micro = version_arr[2].to_int()
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gdk_pixbuf_api_version = '2.0'
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gdk_pixbuf_binary_version = '2.10.0'
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gdk_pixbuf_api_name = '@0@-@1@'.format(meson.project_name(), gdk_pixbuf_api_version)
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if gdk_pixbuf_version_minor.is_odd()
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  gdk_pixbuf_interface_age = 0
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else
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  gdk_pixbuf_interface_age = gdk_pixbuf_version_micro
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endif
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gdk_pixbuf_binary_age = 100 * gdk_pixbuf_version_minor + gdk_pixbuf_version_micro
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# maintaining compatibility with the previous libtool versioning
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# current = binary - interface
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# revision = interface
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soversion = 0
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current = gdk_pixbuf_binary_age - gdk_pixbuf_interface_age
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revision = gdk_pixbuf_interface_age
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libversion = '@0@.@1@.@2@'.format(soversion, current, revision)
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age = gdk_pixbuf_binary_age - gdk_pixbuf_interface_age
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current_minus_age = current - age
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# Paths
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gdk_pixbuf_prefix = get_option('prefix')
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gdk_pixbuf_libdir = join_paths(gdk_pixbuf_prefix, get_option('libdir'))
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gdk_pixbuf_bindir = join_paths(gdk_pixbuf_prefix, get_option('bindir'))
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gdk_pixbuf_includedir = join_paths(gdk_pixbuf_prefix, get_option('includedir'))
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gdk_pixbuf_datadir = join_paths(gdk_pixbuf_prefix, get_option('datadir'))
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gdk_pixbuf_mandir = join_paths(gdk_pixbuf_prefix, get_option('mandir'))
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gdk_pixbuf_localedir = join_paths(gdk_pixbuf_prefix, get_option('localedir'))
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gdk_pixbuf_libexecdir = join_paths(gdk_pixbuf_prefix, get_option('libexecdir'))
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gdk_pixbuf_loaderdir = join_paths(gdk_pixbuf_libdir, 'gdk-pixbuf-@0@/@1@/loaders'.format(gdk_pixbuf_api_version, gdk_pixbuf_binary_version))
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# Dependencies
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glib_req_version = '>= 2.38.0'
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gio_dep = dependency('gio-2.0', version: glib_req_version)
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# Configurations
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gdk_pixbuf_conf = configuration_data()
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check_headers = [
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  'unistd.h',
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  'sys/resource.h',
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  'sys/time.h'
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]
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foreach h: check_headers
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  if cc.has_header(h)
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    gdk_pixbuf_conf.set('HAVE_' + h.underscorify().to_upper(), 1)
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  endif
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endforeach
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# Look for the math library first, since we use it to test for round() and lrint()
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mathlib_dep = cc.find_library('m', required: false)
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# XXX: Remove the checks for round() and lrint() once GDK-Pixbuf is declared C99
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if cc.has_function('round', dependencies: mathlib_dep)
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  gdk_pixbuf_conf.set('HAVE_ROUND', 1)
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endif
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if cc.has_function('lrint', dependencies: mathlib_dep)
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  gdk_pixbuf_conf.set('HAVE_LRINT', 1)
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endif
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# We use links() because sigsetjmp() is often a macro hidden behind other macros
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gdk_pixbuf_conf.set('HAVE_SIGSETJMP',
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                    cc.links('''#define _POSIX_SOURCE
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                                #include <setjmp.h>
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                                int main (void) {
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                                  sigjmp_buf env;
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                                  sigsetjmp (env, 0);
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                                  return 0;
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                                }''', name: 'sigsetjmp'))
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# Common compiler and linker flags
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common_cflags = []
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common_ldflags = []
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if cc.get_id() == 'msvc'
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  # For Visual Studio, just force-include msvc_reommended_pragmas.h
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  # so that we silence unwanted noise and track potential issues
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  test_cflags = []
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  add_project_arguments([ '-FImsvc_recommended_pragmas.h' ], language: 'c')
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elif cc.get_id() == 'gcc' or cc.get_id() == 'clang'
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  test_cflags = [
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    '-Wpointer-arith',
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    '-Wformat=2',
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    '-Wstrict-prototypes',
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    '-Wnested-externs',
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    '-Wold-style-definition',
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    '-Wdeclaration-after-statement',
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    '-Wunused',
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    '-Wcast-align',
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    '-Wmissing-noreturn',
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    '-Wmissing-format-attribute',
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    '-Wlogical-op',
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    '-fno-strict-aliasing',
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    '-Wno-int-conversion',
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    '-Wno-uninitialized',
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    '-Wno-discarded-qualifiers',
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    '-Werror=implicit',
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    '-Werror=nonnull',
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    '-Werror=init-self',
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    '-Werror=main',
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    '-Werror=missing-braces',
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    '-Werror=sequence-point',
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    '-Werror=return-type',
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    '-Werror=trigraphs',
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    '-Werror=array-bounds',
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    '-Werror=write-strings',
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    '-Werror=address',
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    '-Werror=int-to-pointer-cast',
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    '-Werror=pointer-to-int-cast',
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    '-Werror=empty-body',
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  ]
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  # Ensure we have the correct bit packing on Windows
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  if host_system == 'windows'
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    test_cflags += '-mms-bitfields'
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  endif
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else
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  test_cflags = []
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endif
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# Symbol visibility
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if get_option('default_library') != 'static'
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  if host_system == 'windows'
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    gdk_pixbuf_conf.set('DLL_EXPORT', true)
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    gdk_pixbuf_conf.set('_GDK_PIXBUF_EXTERN', '__declspec(dllexport) extern')
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    if cc.get_id() != 'msvc'
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      test_cflags += ['-fvisibility=hidden']
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    endif
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  else
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    gdk_pixbuf_conf.set('_GDK_PIXBUF_EXTERN', '__attribute__((visibility("default"))) extern')
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    test_cflags += ['-fvisibility=hidden']
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  endif
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endif
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foreach cflag: test_cflags
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  if cc.has_argument(cflag)
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    common_cflags += cflag
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  endif
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endforeach
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# Linker flags
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if host_machine.system() == 'linux'
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  ldflag_prog = 'int main (void) { return 0; }'
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  foreach ldflag: [ '-Wl,-Bsymbolic', '-Wl,-z,relro', '-Wl,-z,now', ]
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    if cc.links(ldflag_prog, args: ldflag, name: 'using @0@'.format(ldflag))
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      common_ldflags += ldflag
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    endif
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  endforeach
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endif
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# Maintain compatibility with autotools on macOS
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if host_machine.system() == 'darwin'
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  common_ldflags += [ '-compatibility_version 1', '-current_version 1.0', ]
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endif
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# Dependencies
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gobject_dep = dependency('gobject-2.0', version: glib_req_version)
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gmodule_dep = dependency('gmodule-no-export-2.0')
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gio_dep = dependency('gio-2.0')
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# On non-Windows/macOS systems we always required shared-mime-info and GIO
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if host_system != 'windows' and host_system != 'darwin'
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  shared_mime_dep = dependency('shared-mime-info')
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  gdk_pixbuf_conf.set('GDK_PIXBUF_USE_GIO_MIME', 1)
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else
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  shared_mime_dep = []
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endif
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gdk_pixbuf_deps = [ mathlib_dep, gobject_dep, gmodule_dep, gio_dep, shared_mime_dep ]
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# Check if we can build shared modules
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build_modules = gmodule_dep.get_pkgconfig_variable('gmodule_supported') == 'true'
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gdk_pixbuf_conf.set10('USE_GMODULE', build_modules)
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# Check which loaders should be built into gdk-pixbuf
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builtin_loaders = get_option('builtin_loaders').split(',')
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# If 'all' is specified for builtin_loaders, build all
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# buildable loaders into gdk-pixbuf
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builtin_all_loaders = false
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if builtin_loaders == [ 'all' ]
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  builtin_all_loaders = true
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endif
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# Loader dependencies
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enabled_loaders = []
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loaders_deps = []
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if get_option('enable_png')
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  # We have a vast selection of libpng versions to choose from
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  foreach png: [ 'libpng16', 'libpng15', 'libpng14', 'libpng13', 'libpng12', 'libpng10' ]
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    if not enabled_loaders.contains('png')
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      png_dep = dependency(png, required: false)
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      if png_dep.found()
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        enabled_loaders += 'png'
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        loaders_deps += png_dep
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      endif
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    endif
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  endforeach
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  if not enabled_loaders.contains('png')
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    if cc.get_id() == 'msvc' and cc.has_header('png.h')
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      # MSVC: First look for the DLL + import .lib build of libpng,
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      # which is normally libpngxx.lib, when libpng's pkg-config can't
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      # be found, which is quite normal on MSVC.
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      foreach png: [ 'libpng16', 'libpng15', 'libpng14', 'libpng12', 'libpng13', 'libpng10' ]
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        if not enabled_loaders.contains('png')
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          png_dep = cc.find_library(png, required: false)
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          if png_dep.found()
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            enabled_loaders += 'png'
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            loaders_deps += png_dep
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          endif
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        endif
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      endforeach
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      # If we still can't find libpng, try looking for the static libpng.lib,
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      # which means we need to ensure we have the static zlib .lib as well
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      if not enabled_loaders.contains('png')
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        png_dep = cc.find_library('libpng', required: false)
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        zlib_dep = cc.find_library('zlib', required: false)
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        if png_dep.found() and zlib_dep.found()
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          enabled_loaders += 'png'
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          loaders_deps += [ png_dep, zlib_dep ]
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        endif
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      endif
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    endif
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  endif
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endif
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# On Windows, check whether we are building the native Windows loaders
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# (it is an "all-or-nothing" option for BMP, EMF, GIF, ICO, JPEG, TIFF and WMF)
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# Note that we currently do not use the native Windows loaders to handle PNG and
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# JPEG2000 images
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if host_system == 'windows'
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  enable_native_windows_loaders = get_option('enable_native_windows_loaders')
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else
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  enable_native_windows_loaders = false
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endif
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if enable_native_windows_loaders
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  loaders_deps += cc.find_library('gdiplus')
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  loaders_deps += cc.find_library('ole32')
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  enabled_loaders += 'gdiplus'
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endif
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# Don't check and build the jpeg loader if enable_native_windows_loaders is true
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if get_option('enable_jpeg') and not enable_native_windows_loaders
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  if cc.has_header('jpeglib.h')
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    jpeg_dep = cc.find_library('jpeg', required: false)
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    if cc.get_id() == 'msvc' and not jpeg_dep.found()
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      # The IJG JPEG library builds the .lib file as libjpeg.lib in its MSVC build system,
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      # so look for it as well when jpeg.lib cannot be found
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      jpeg_dep = cc.find_library('libjpeg', required: false)
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    endif
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    if jpeg_dep.found() and cc.has_function('jpeg_destroy_decompress', dependencies: jpeg_dep)
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      enabled_loaders += 'jpeg'
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      loaders_deps += jpeg_dep
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      gdk_pixbuf_conf.set('HAVE_PROGRESSIVE_JPEG',
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                          cc.has_function('jpeg_simple_progression', dependencies: jpeg_dep))
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    endif
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  endif
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endif
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# Don't check and build the tiff loader if enable_native_windows_loaders is true
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if get_option('enable_tiff') and not enable_native_windows_loaders
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  tiff_dep = dependency('libtiff-4', required: false)
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  if not tiff_dep.found()
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    # Fallback when no pkg-config file is found for libtiff on MSVC, which is quite normal
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    if cc.get_id() == 'msvc' and cc.has_header('tiff.h')
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      # First look for the DLL builds of libtiff, then the static builds
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      tiff_dep = cc.find_library('libtiff_i', required: false)
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      if not tiff_dep.found()
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        # For the static lib, zlib and libjpeg .lib's have been looked for first, and
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        # they are optional for libtiff
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        tiff_dep = cc.find_library('libtiff', required: false)
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      endif
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    endif
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  endif
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  if tiff_dep.found()
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    enabled_loaders += 'tiff'
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    loaders_deps += tiff_dep
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  endif
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endif
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jasper_extra_cflags = []
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if get_option('enable_jasper')
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  has_jasper_header = false
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  if cc.get_id() == 'msvc'
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    # We must define JAS_WIN_MSVC_BUILD before including jasper/jasper.h on MSVC
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    jasper_msvc_macro = 'JAS_WIN_MSVC_BUILD'
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    has_jasper_header = cc.has_header('jasper/jasper.h', prefix: '#define @0@'.format(jasper_msvc_macro))
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    jasper_extra_cflags = [ '-D@0@'.format(jasper_msvc_macro) ]
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  else
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    has_jasper_header = cc.has_header('jasper/jasper.h')
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  endif
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  if has_jasper_header
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    jasper_dep = cc.find_library('jasper', required: false)
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    if not jasper_dep.found()
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      if cc.get_id() == 'msvc'
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        # on MSVC, we need to look for libjasper.lib if jasper.lib is not found,
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        # which corresponds to what libjasper's MSVC projects produce
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        jasper_dep = cc.find_library('libjasper', required: false)
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      endif
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    endif
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    if jasper_dep.found() and cc.has_function('jas_init', dependencies: jasper_dep)
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      enabled_loaders += 'jasper'
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      loaders_deps += jasper_dep
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    endif
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  endif
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endif
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# Determine whether we enable application bundle relocation support, and we use
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# this always on Windows
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if host_system == 'windows'
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  relocatable = true
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else
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  relocatable = get_option('enable_relocatable')
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endif
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if relocatable
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  add_project_arguments([ '-DGDK_PIXBUF_RELOCATABLE' ], language: 'c')
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endif
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gdk_pixbuf_conf.set_quoted('GETTEXT_PACKAGE', meson.project_name())
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configure_file(output: 'config.h', configuration: gdk_pixbuf_conf)
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# Compat variables for pkgconfig
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pkgconf = configuration_data()
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pkgconf.set('prefix', gdk_pixbuf_prefix)
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pkgconf.set('exec_prefix', gdk_pixbuf_prefix)
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pkgconf.set('libdir', gdk_pixbuf_libdir)
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pkgconf.set('includedir', gdk_pixbuf_includedir)
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pkgconf.set('GDK_PIXBUF_API_VERSION', gdk_pixbuf_api_version)
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pkgconf.set('GDK_PIXBUF_BINARY_VERSION', gdk_pixbuf_binary_version)
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pkgconf.set('GDK_PIXBUF_EXTRA_CFLAGS', '')
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pkgconf.set('GDK_PIXBUF_EXTRA_LIBS', '')
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pkgconf.set('PNG_DEP_CFLAGS_PACKAGES', '')
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pkgconf.set('VERSION', meson.project_version())
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configure_file(input: 'gdk-pixbuf-2.0.pc.in',
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               output: 'gdk-pixbuf-2.0.pc',
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               configuration: pkgconf,
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               install: true,
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               install_dir: join_paths(gdk_pixbuf_libdir, 'pkgconfig'))
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root_inc = include_directories('.')
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# Auxiliary scripts
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gen_resources = find_program('build-aux/gen-resources.py')
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gen_installed_test = find_program('build-aux/gen-installed-test.py')
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gen_thumbnailer = find_program('build-aux/gen-thumbnailer.py')
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gnome = import('gnome')
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subdir('gdk-pixbuf')
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# X11
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x11_dep = dependency('x11', required: false)
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if x11_dep.found()
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  subdir('contrib/gdk-pixbuf-xlib')
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endif
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# i18n
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subdir('po')
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subdir('tests')
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subdir('thumbnailer')
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# Documentation
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subdir('docs/reference/gdk-pixbuf')