mirror of
https://gitlab.gnome.org/GNOME/glib.git
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d941558ee9
G_MODULE_SUFFIX is deprecated now because you will get the wrong results using it most of the time: 1. The suffix on macOS is usually 'dylib', but it's 'so' when using Autotools, so there's no way to get the suffix correct using a pre-processor macro. 2. Prefixes also vary in a platform-specific way. You may or may not have a 'lib' prefix for the name on Windows and on Cygwin the prefix is 'cyg'. 3. The library name itself can vary per platform. For instance, you may want to load foo-1.dll on Windows and libfoo.1.dylib on macOS. This is for libraries, not modules, but that is still a use-case that people use the GModule API for. g_module_build_path() does take care of (2) on Cygwin, but it fundamentally cannot handle the possibility of multiple options for the module name, since it does not do any I/O. Hence, it is also deprecated. Instead, g_module_open() has been improved so that it takes care of all this by searching the filesystem for combinations of possible suffixes and prefixes on each platform. Along the way, the documentation for it was also improved to make it clearer what it does. Closes https://gitlab.gnome.org/GNOME/glib/-/issues/520 Closes https://gitlab.gnome.org/GNOME/glib/-/issues/1413
148 lines
4.6 KiB
Meson
148 lines
4.6 KiB
Meson
gmoduleconf_conf = configuration_data()
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g_module_need_uscore = 0
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g_module_broken_rtld_global = 0
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g_module_have_dlerror = 0
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g_module_impl = ''
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g_module_includedir = glib_includedir / 'gmodule'
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# On Windows force native WIN32 shared lib loader
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if host_system == 'windows'
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g_module_impl = 'G_MODULE_IMPL_WIN32'
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# Force native AIX library loader
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# dlopen() filepath must be of the form /path/libname.a(libname.so)
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elif host_system == 'aix'
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g_module_impl = 'G_MODULE_IMPL_AR'
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elif have_dlopen_dlsym
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g_module_impl = 'G_MODULE_IMPL_DL'
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endif
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# additional checks for G_MODULE_IMPL_DL
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if g_module_impl == 'G_MODULE_IMPL_DL'
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# FIXME: check for OSF1/5.0 RTLD_GLOBAL brokenness (is this still relevant?)
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# Check whether we need preceding underscores
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if cc.get_id() == 'msvc' or cc.get_id() == 'clang-cl'
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message('Building for MSVC: assuming that symbols are prefixed with underscore')
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g_module_need_uscore = 1
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elif meson.can_run_host_binaries()
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# FIXME: communicate result via stdout instead of return value, so non-0 return is not printed in bold red
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rres = cc.run(dlopen_dlsym_test_code,
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dependencies : libdl_dep,
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name : 'dlsym() preceding underscores')
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if host_system == 'windows' or (rres.compiled() and rres.returncode() == 0)
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g_module_need_uscore = 1
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endif
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else
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message('Cross-compiling: assuming that symbols aren\'t prefixed with underscore')
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g_module_need_uscore = 0
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endif
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if cc.has_function('dlerror', dependencies : libdl_dep)
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g_module_have_dlerror = 1
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endif
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endif
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# Done, have we got an implementation?
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if g_module_impl == ''
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g_module_impl = '0'
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message('WARNING: No suitable GModule implementation found!')
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endif
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gmoduleconf_conf.set('G_MODULE_IMPL', g_module_impl)
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gmoduleconf_conf.set('G_MODULE_SUPPORTED', g_module_impl != '0')
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gmoduleconf_conf.set('G_MODULE_HAVE_DLERROR', g_module_have_dlerror)
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gmoduleconf_conf.set('G_MODULE_NEED_USCORE', g_module_need_uscore)
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gmoduleconf_conf.set('G_MODULE_BROKEN_RTLD_GLOBAL', g_module_broken_rtld_global)
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gmoduleconf_h = configure_file(input : 'gmoduleconf.h.in',
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output : 'gmoduleconf.h',
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configuration : gmoduleconf_conf)
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# Expose as variable to be used by gobject-introspection
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# when it includes GLib as a subproject
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gmodule_h = files('gmodule.h')
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gmodule_c = files('gmodule.c')
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install_headers([gmodule_h], install_dir : glib_includedir)
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gvisibility_h = custom_target(
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output: 'gmodule-visibility.h',
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command: [gen_visibility_macros, meson.project_version(), 'visibility-macros', 'GMODULE', '@OUTPUT@'],
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install: true,
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install_dir: g_module_includedir,
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)
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gmodule_sources = [gmodule_c, gvisibility_h, 'gmodule-deprecated.c']
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if host_system == 'windows'
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gmodule_win_rc = configure_file(
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input: 'gmodule.rc.in',
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output: 'gmodule.rc',
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configuration: glibconfig_conf,
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)
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gmodule_win_res = windows.compile_resources(gmodule_win_rc)
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gmodule_sources += [gmodule_win_res]
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endif
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libgmodule = library('gmodule-2.0',
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sources : gmodule_sources,
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version : library_version,
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soversion : soversion,
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darwin_versions : darwin_versions,
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install : true,
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include_directories : [configinc, gmoduleinc],
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dependencies : [libdl_dep, libglib_dep],
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c_args : ['-DG_LOG_DOMAIN="GModule"', '-DGMODULE_COMPILATION'],
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gnu_symbol_visibility : 'hidden',
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link_args : [glib_link_flags],
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)
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supported_var = 'gmodule_supported=@0@'.format(g_module_impl != '0')
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pkg.generate(libgmodule,
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libraries : [thread_dep],
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requires : ['glib-2.0'],
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version : glib_version,
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variables : [supported_var],
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install_dir : glib_pkgconfigreldir,
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filebase : 'gmodule-no-export-2.0',
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name : 'GModule',
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description : 'Dynamic module loader for GLib',
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)
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pkg.generate(libraries : [libgmodule, export_dynamic_ldflags],
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requires : ['glib-2.0'],
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version : glib_version,
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variables : [supported_var],
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install_dir : glib_pkgconfigreldir,
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filebase : 'gmodule-export-2.0',
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name : 'GModule',
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description : 'Dynamic module loader for GLib',
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)
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pkg.generate(libraries : [libgmodule, export_dynamic_ldflags],
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requires : ['glib-2.0'],
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version : glib_version,
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variables : [supported_var],
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install_dir : glib_pkgconfigreldir,
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filebase : 'gmodule-2.0',
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name : 'GModule',
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description : 'Dynamic module loader for GLib',
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)
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libgmodule_dep = declare_dependency(link_with : libgmodule,
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include_directories : [gmoduleinc],
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sources : [gvisibility_h],
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dependencies : [libglib_dep])
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meson.override_dependency('gmodule-no-export-2.0', libgmodule_dep)
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meson.override_dependency('gmodule-export-2.0', libgmodule_dep)
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meson.override_dependency('gmodule-2.0', libgmodule_dep)
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if build_tests
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subdir('tests')
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endif
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