meson: unwind

meson.build

@@ -133,6 +133,7 @@ subdir('meson' / 'sodium')
 subdir('meson' / 'pcre')
 subdir('meson' / 'gssapi')
 subdir('meson' / 'crypt')
+subdir('meson' / 'unwind')
 
 dovecot_moduledir = get_option('moduledir')
 if dovecot_moduledir == ''

meson.options

@@ -13,6 +13,7 @@ option('mem-align', type: 'integer', value: 8, min: 1, description: 'Set the mem
 option('random-source', type: 'string', value : '/dev/urandom', description: 'Device file to use as random source')
 option('ioloop', type: 'combo', choices: ['best', 'epoll', 'kqueue', 'poll', 'select'], value: 'best', description: 'I/O loop method to use (best for the fastest available)')
 option('notify', type: 'combo', choices: ['best', 'inotify', 'kqueue', 'none'], value: 'best', description: 'File system notification method to use (best for the fastest available)')
+option('libunwind', type: 'feature', value: 'auto', description: 'Build with libunwind support (better backtraces)')
 option('sodium', type: 'feature', value: 'auto', description: 'Build with libsodium support (enables argon2)')
 option('pcre', type: 'feature', value: 'auto', description: 'Build with libpcre2 support (enables regular expressions)')
 option('gssapi', type: 'combo', choices: ['disabled', 'enabled', 'auto', 'plugin'], value: 'disabled', description: 'Build with GSSAPI authentication support')

meson/unwind/meson.build

@@ -0,0 +1,10 @@
+# Prefer libunwind over backtrace()/execinfo.
+ext_unwind = dependency('libunwind-generic', required: get_option('libunwind'))
+
+conf.set(
+  'HAVE_LIBUNWIND',
+  ext_unwind.found(),
+  description: 'Have libunwind',
+)
+
+summary({'libunwind': ext_unwind}, section: 'Features')