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10280deebd
Meson 0.54.0 added a new method meson.override_dependency() that must be
used to ensure dependency consistency. This patch ensures a project that
depends on glib will never link to a mix of system and subproject
libraries. It would happen in such cases:
The system has glib 2.40 installed, and a project does:
dependency('glib-2.0', version: '>=2.60',
fallback: ['glib', 'glib_dep'])
dependency('gobject-2.0')
The first call will configure glib subproject because the system libglib
is too old, but the 2nd call will return system libgobject.
By overriding 'gobject-2.0' dependency while configuring glib subproject
during the first call, meson knows that on the 2nd call it must return
the subproject dependency instead of system dependency.
This also has the nice side effect that with Meson >0.54.0 an
application depending on glib can declare the fallback without knowing
the dependency variable name: dependency('glib-2.0', fallback: 'glib').
129 lines
4.1 KiB
Meson
129 lines
4.1 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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# 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.has_exe_wrapper()
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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.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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install_headers(['gmodule.h'], subdir : 'glib-2.0')
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gmodule_sources = ['gmodule.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"'] + glib_hidden_visibility_args,
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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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dependencies : [libglib_dep])
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if meson.version().version_compare('>=0.54.0')
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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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endif
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