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meson: drop libdl, threads, and librt dependencies

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Our baseline glibc is 2.34, which merged libdl, libpthread (the
dependency('threads') target), and librt into libc. Empty .so/.a stubs
remain for backward compatibility with old binaries, but new builds
resolve dl_*, pthread_*, mq_*, timer_*, etc. directly from libc.
On musl the same libraries are likewise empty stubs.

Drop the libdl, threads, and librt entries from every meson.build, and
remove the now-stale 'Libs.private: -lrt -pthread' from libudev.pc.in
since both flags resolve to empty link-time stubs on glibc 2.34+ and
musl.

Verified with readelf -d that libsystemd.so, libudev.so, and systemd no
longer carry DT_NEEDED entries for libdl/libpthread/librt.
This commit is contained in:
Daan De Meyer
2026-05-18 21:17:38 +00:00
parent 5a1644de34
commit a14adac423
30 changed files with 15 additions and 130 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meson.build
+4 -20
View File
@@ -978,10 +978,7 @@ endif
#####################################################################
threads = dependency('threads')
librt = cc.find_library('rt')
libm = cc.find_library('m')
libdl = cc.find_library('dl')
# Header presence check only — dgettext itself is resolved via dlopen_libintl() at runtime, so we never
# link against libintl. On glibc dgettext lives in libc; on musl gettext-dev provides libintl.h alongside
@@ -1758,9 +1755,7 @@ libsystemd = shared_library(
link_with : [libc_wrapper_static,
libbasic_static],
link_whole : [libsystemd_static],
dependencies : [librt,
threads,
userspace],
dependencies : [userspace],
link_depends : libsystemd_sym,
install : true,
install_tag: 'libsystemd',
@@ -1779,14 +1774,11 @@ if static_libsystemd != 'false'
install_tag: 'libsystemd',
install_dir : libdir,
pic : static_libsystemd_pic,
dependencies : [libdl,
libgcrypt_cflags,
dependencies : [libgcrypt_cflags,
liblz4_cflags,
libm,
librt,
libxz_cflags,
libzstd_cflags,
threads,
userspace],
c_args : libsystemd_c_args + (static_libsystemd_pic ? [] : ['-fno-PIC']))
@@ -1804,8 +1796,7 @@ libudev = shared_library(
'-Wl,--version-script=' + libudev_sym_path],
link_with : [libsystemd_static],
link_whole : libudev_basic,
dependencies : [threads,
userspace],
dependencies : [userspace],
link_depends : libudev_sym,
install : true,
install_tag: 'libudev',
@@ -1922,10 +1913,6 @@ nss_template = {
libshared_static,
libbasic_static,
],
'dependencies' : [
librt,
threads,
],
'install' : true,
'install_tag' : 'nss',
'install_dir' : libdir,
@@ -1938,10 +1925,7 @@ pam_template = {
libsystemd_static,
libshared_static,
],
'dependencies' : [
libpam_cflags,
threads,
],
'dependencies' : libpam_cflags,
'install' : true,
'install_tag' : 'pam',
'install_dir' : pamlibdir,
src/basic/meson.build
-3
View File
@@ -212,15 +212,12 @@ libbasic_static = static_library(
include_directories : basic_includes,
implicit_include_directories : false,
dependencies : [libbzip2_cflags,
libdl,
libgcrypt_cflags,
liblz4_cflags,
libm,
librt,
libxz_cflags,
libz_cflags,
libzstd_cflags,
threads,
userspace],
c_args : ['-fvisibility=default'],
build_by_default : false)
src/core/meson.build
-3
View File
@@ -148,13 +148,10 @@ libcore_static = static_library(
dependencies : [libaudit_cflags,
libbpf_cflags,
libcryptsetup_cflags,
libdl,
libm,
libmount_cflags,
librt,
libseccomp_cflags,
libselinux_cflags,
threads,
userspace],
build_by_default : false)
src/coredump/meson.build
-1
View File
@@ -30,7 +30,6 @@ common_dependencies = [
liblz4_cflags,
libxz_cflags,
libzstd_cflags,
threads,
]
executables += [
src/creds/meson.build
-1
View File
@@ -12,7 +12,6 @@ executables += [
'dependencies' : [
libmount_cflags,
libopenssl_cflags,
threads,
],
},
]
src/cryptenroll/meson.build
-1
View File
@@ -22,7 +22,6 @@ executables += [
'sources' : systemd_cryptenroll_sources,
'dependencies' : [
libcryptsetup_cflags,
libdl,
libfido2_cflags,
libopenssl_cflags,
libp11kit_cflags,
src/home/meson.build
+1 -11
View File
@@ -67,10 +67,7 @@ executables += [
'dbus' : true,
'sources' : systemd_homed_sources,
'extract' : systemd_homed_extract_sources,
'dependencies' : [
libopenssl_cflags,
threads,
],
'dependencies' : libopenssl_cflags,
},
libexec_template + {
'name' : 'systemd-homework',
@@ -81,7 +78,6 @@ executables += [
libfdisk_cflags,
libopenssl_cflags,
libp11kit_cflags,
threads,
],
},
executable_template + {
@@ -91,10 +87,8 @@ executables += [
'extract' : homectl_extract,
'objects' : ['systemd-homed'],
'dependencies' : [
libdl,
libopenssl_cflags,
libp11kit_cflags,
threads,
],
},
test_template + {
@@ -113,10 +107,6 @@ modules += [
'name' : 'pam_systemd_home',
'conditions' : ['HAVE_PAM'],
'sources' : pam_systemd_home_sources,
'dependencies' : [
libpam_cflags,
threads,
],
'version-script' : meson.current_source_dir() / 'pam_systemd_home.sym',
},
]
src/import/meson.build
-1
View File
@@ -17,7 +17,6 @@ executables += [
'import-common.c',
'qcow2-util.c',
),
'dependencies' : threads,
},
libexec_template + {
'name' : 'systemd-pull',
src/journal-remote/meson.build
-1
View File
@@ -25,7 +25,6 @@ common_deps = [
liblz4_cflags,
libxz_cflags,
libzstd_cflags,
threads,
]
executables += [
src/journal/meson.build
-5
View File
@@ -72,7 +72,6 @@ executables += [
libselinux_cflags,
libxz_cflags,
libzstd_cflags,
threads,
],
},
libexec_template + {
@@ -86,7 +85,6 @@ executables += [
'public' : true,
'sources' : files('cat.c'),
'objects' : ['systemd-journald'],
'dependencies' : [threads],
},
executable_template + {
'name' : 'journalctl',
@@ -94,11 +92,9 @@ executables += [
'sources' : journalctl_sources,
'link_with' : journalctl_link_with,
'dependencies' : [
libdl,
liblz4_cflags,
libxz_cflags,
libzstd_cflags,
threads,
],
},
journal_test_template + {
@@ -123,7 +119,6 @@ executables += [
liblz4_cflags,
libselinux_cflags,
libxz_cflags,
threads,
],
},
journal_test_template + {
src/libsystemd/meson.build
+3 -18
View File
@@ -150,9 +150,7 @@ libsystemd_static = static_library(
c_args : libsystemd_c_args,
link_with : [libc_wrapper_static,
libbasic_static],
dependencies : [threads,
libm,
librt,
dependencies : [libm,
userspace],
build_by_default : false)
@@ -203,20 +201,17 @@ simple_tests += files(
libsystemd_tests += [
{
'sources' : files('sd-bus/test-bus-address.c'),
'dependencies' : threads
},
{
'sources' : files('sd-bus/test-bus-benchmark.c'),
'dependencies' : threads,
'type' : 'manual',
},
{
'sources' : files('sd-bus/test-bus-chat.c'),
'dependencies' : threads,
},
{
'sources' : files('sd-bus/test-bus-cleanup.c'),
'dependencies' : [threads, libseccomp_cflags],
'dependencies' : libseccomp_cflags,
},
{
'sources' : files('sd-bus/test-bus-marshal.c'),
@@ -226,28 +221,22 @@ libsystemd_tests += [
libglib_cflags,
libgobject_cflags,
libm,
threads,
],
},
{
'sources' : files('sd-bus/test-bus-objects.c'),
'dependencies' : threads,
},
{
'sources' : files('sd-bus/test-bus-peersockaddr.c'),
'dependencies' : threads,
},
{
'sources' : files('sd-bus/test-bus-queue-ref-cycle.c'),
'dependencies' : threads,
},
{
'sources' : files('sd-bus/test-bus-server.c'),
'dependencies' : threads,
},
{
'sources' : files('sd-bus/test-bus-signature.c'),
'dependencies' : threads,
},
{
'sources' : files('sd-bus/test-bus-track.c'),
@@ -255,12 +244,11 @@ libsystemd_tests += [
},
{
'sources' : files('sd-bus/test-bus-watch-bind.c'),
'dependencies' : threads,
'timeout' : 120,
},
{
'sources' : files('sd-device/test-sd-device.c'),
'dependencies' : [threads, libmount_cflags],
'dependencies' : libmount_cflags,
},
{
'sources' : files('sd-event/test-event.c'),
@@ -288,16 +276,13 @@ libsystemd_tests += [
},
{
'sources' : files('sd-resolve/test-resolve.c'),
'dependencies' : threads,
'timeout' : 120,
},
{
'sources' : files('sd-varlink/test-varlink.c'),
'dependencies' : threads,
},
{
'sources' : files('sd-varlink/test-varlink-idl.c'),
'dependencies' : threads,
},
]
src/libudev/libudev.pc.in
-1
View File
@@ -16,5 +16,4 @@ Name: libudev
Description: Library to access udev device information
Version: {{PROJECT_VERSION}}
Libs: -L${libdir} -ludev
Libs.private: -lrt -pthread
Cflags: -I${includedir}
src/locale/meson.build
-1
View File
@@ -18,7 +18,6 @@ localectl_sources = files('localectl.c')
# specify where the headers are.
if conf.get('HAVE_XKBCOMMON') == 1
libxkbcommon_deps = [
libdl,
libxkbcommon_cflags,
]
else
src/login/meson.build
-5
View File
@@ -48,9 +48,6 @@ executables += [
'dbus' : true,
'sources' : systemd_logind_sources,
'extract' : systemd_logind_extract_sources,
'dependencies' : [
threads,
],
},
executable_template + {
'name' : 'loginctl',
@@ -60,7 +57,6 @@ executables += [
liblz4_cflags,
libxz_cflags,
libzstd_cflags,
threads,
],
},
executable_template + {
@@ -79,7 +75,6 @@ executables += [
test_template + {
'sources' : files('test-login-tables.c'),
'objects' : ['systemd-logind'],
'dependencies' : threads,
},
test_template + {
'sources' : files('test-session-properties.c'),
src/machine/meson.build
-2
View File
@@ -36,13 +36,11 @@ executables += [
liblz4_cflags,
libxz_cflags,
libzstd_cflags,
threads,
],
},
test_template + {
'sources' : files('test-machine-tables.c'),
'objects' : ['systemd-machined'],
'dependencies': threads,
},
]
src/network/meson.build
-4
View File
@@ -188,7 +188,6 @@ network_fuzz_template = fuzz_template + {
libsystemd_network,
],
'objects' : ['systemd-networkd'],
'dependencies' : threads,
'include_directories' : network_includes,
}
@@ -204,7 +203,6 @@ executables += [
libsystemd_network,
networkd_link_with,
],
'dependencies' : threads,
'bpf_programs': [
'sysctl-monitor',
]
@@ -240,11 +238,9 @@ executables += [
},
network_test_template + {
'sources' : files('test-network-tables.c'),
'dependencies' : threads,
},
network_test_template + {
'sources' : files('test-network.c'),
'dependencies' : threads,
},
network_test_template + {
'sources' : files('test-networkd-address.c'),
src/nsresourced/meson.build
-2
View File
@@ -24,13 +24,11 @@ executables += [
'name' : 'systemd-nsresourced',
'sources' : systemd_nsresourced_sources,
'extract' : systemd_nsresourced_extract_sources,
'dependencies' : threads,
'bpf_programs': ['userns-restrict'],
},
libexec_template + {
'name' : 'systemd-nsresourcework',
'sources' : systemd_nsresourcework_sources,
'dependencies' : threads,
'objects' : ['systemd-nsresourced'],
'bpf_programs': ['userns-restrict'],
},
src/portable/meson.build
-2
View File
@@ -32,7 +32,6 @@ executables += [
libcryptsetup_cflags,
libmount_cflags,
libselinux_cflags,
threads,
],
},
executable_template + {
@@ -40,7 +39,6 @@ executables += [
'public' : true,
'sources' : files('portablectl.c'),
'link_with' : portabled_link_with,
'dependencies' : threads,
},
]
src/pstore/meson.build
-1
View File
@@ -12,7 +12,6 @@ executables += [
liblz4_cflags,
libxz_cflags,
libzstd_cflags,
threads,
],
},
]
src/repart/meson.build
-2
View File
@@ -17,7 +17,6 @@ executables += [
libfdisk_cflags,
libmount_cflags,
libopenssl_cflags,
threads,
],
},
executable_template + {
@@ -35,7 +34,6 @@ executables += [
libfdisk_cflags,
libmount_cflags,
libopenssl_cflags,
threads,
],
},
]
src/resolve/meson.build
-1
View File
@@ -72,7 +72,6 @@ resolve_common_template = {
libidn2_cflags,
libopenssl_cflags,
libm,
threads,
],
}
src/shared/meson.build
+1 -4
View File
@@ -383,8 +383,7 @@ shared_sources += [dns_type_from_name_inc, dns_type_to_name_inc]
libshared_name = 'systemd-shared-@0@'.format(shared_lib_tag)
libshared_deps = [threads,
libacl_cflags,
libshared_deps = [libacl_cflags,
libapparmor_cflags,
libarchive_cflags,
libaudit_cflags,
@@ -393,7 +392,6 @@ libshared_deps = [threads,
libcrypt_cflags,
libcryptsetup_cflags,
libcurl_cflags,
libdl,
libdw_cflags,
libelf_cflags,
libfdisk_cflags,
@@ -410,7 +408,6 @@ libshared_deps = [threads,
libpcre2_cflags,
libpwquality_cflags,
libqrencode_cflags,
librt,
libseccomp_cflags,
libselinux_cflags,
libxenctrl_cflags,
src/socket-activate/meson.build
-1
View File
@@ -5,6 +5,5 @@ executables += [
'name' : 'systemd-socket-activate',
'public' : true,
'sources' : files('socket-activate.c'),
'dependencies' : threads,
},
]
src/socket-proxy/meson.build
-1
View File
@@ -5,6 +5,5 @@ executables += [
'name' : 'systemd-socket-proxyd',
'public' : true,
'sources' : files('socket-proxyd.c'),
'dependencies' : threads,
},
]
src/systemctl/meson.build
-1
View File
@@ -58,7 +58,6 @@ executables += [
liblz4_cflags,
libxz_cflags,
libzstd_cflags,
threads,
],
'install_tag' : 'systemctl',
},
src/sysupdate/meson.build
-2
View File
@@ -30,7 +30,6 @@ executables += [
'dependencies' : [
libfdisk_cflags,
libopenssl_cflags,
threads,
],
},
libexec_template + {
@@ -38,7 +37,6 @@ executables += [
'dbus' : true,
'conditions' : ['ENABLE_SYSUPDATED'],
'sources' : files('sysupdated.c'),
'dependencies' : threads,
},
executable_template + {
'name' : 'updatectl',
src/test/meson.build
+5 -26
View File
@@ -223,10 +223,8 @@ simple_tests += files(
common_test_dependencies = [
libmount_cflags,
librt,
libseccomp_cflags,
libselinux_cflags,
threads,
]
executables += [
@@ -303,14 +301,13 @@ executables += [
],
},
test_template + {
# only static linking apart from libdl, to make sure that the
# module is linked to all libraries that it uses.
# only static linking, to make sure that the module is linked
# to all libraries that it uses.
'sources' : files('test-dlopen.c'),
'link_with' : [
libc_wrapper_static,
libbasic_static,
],
'dependencies' : libdl,
'install' : false,
'type' : 'manual',
},
@@ -359,10 +356,7 @@ executables += [
test_template + {
'sources' : files('test-libmount.c'),
'conditions' : ['HAVE_LIBMOUNT'],
'dependencies' : [
libmount_cflags,
threads,
],
'dependencies' : libmount_cflags,
},
test_template + {
'sources' : files('test-loopback.c'),
@@ -378,7 +372,6 @@ executables += [
},
test_template + {
'sources' : files('test-pressure.c'),
'dependencies' : threads,
},
test_template + {
'sources' : files('test-mount-util.c'),
@@ -398,17 +391,13 @@ executables += [
test_template + {
'sources' : files('test-nss-hosts.c'),
'extract' : files('nss-test-util.c'),
'dependencies' : [
libdl,
libseccomp_cflags,
],
'dependencies' : libseccomp_cflags,
'conditions' : ['ENABLE_NSS'],
'timeout' : 120,
},
test_template + {
'sources' : files('test-nss-users.c'),
'objects' : ['test-nss-hosts'],
'dependencies' : libdl,
'conditions' : ['ENABLE_NSS'],
},
test_template + {
@@ -426,7 +415,6 @@ executables += [
},
test_template + {
'sources' : files('test-process-util.c'),
'dependencies' : threads,
},
test_template + {
'sources' : files('test-progress-bar.c'),
@@ -441,7 +429,6 @@ executables += [
},
test_template + {
'sources' : files('test-qrcode-util.c'),
'dependencies' : libdl,
},
test_template + {
'sources' : files('test-random-util.c'),
@@ -471,7 +458,6 @@ executables += [
},
test_template + {
'sources' : files('test-set-disable-mempool.c'),
'dependencies' : threads,
},
test_template + {
'sources' : files('test-sizeof.c'),
@@ -603,7 +589,6 @@ executables += [
},
core_test_template + {
'sources' : files('test-loop-util.c'),
'dependencies' : [threads],
'parallel' : false,
},
core_test_template + {
@@ -611,10 +596,7 @@ executables += [
},
core_test_template + {
'sources' : files('test-namespace.c'),
'dependencies' : [
threads,
libmount_cflags,
],
'dependencies' : libmount_cflags,
},
core_test_template + {
'sources' : files('test-ns.c'),
@@ -632,7 +614,6 @@ executables += [
},
core_test_template + {
'sources' : files('test-socket-bind.c'),
'dependencies' : libdl,
'conditions' : ['BPF_FRAMEWORK'],
},
core_test_template + {
@@ -666,7 +647,6 @@ executables += [
libbasic_static,
libsystemd,
],
'dependencies' : threads,
},
test_template + {
'sources' : files('../libudev/test-udev-device-thread.c'),
@@ -675,7 +655,6 @@ executables += [
libbasic_static,
libudev,
],
'dependencies' : threads,
},
test_template + {
'sources' : files('../libudev/test-libudev.c'),
src/timesync/meson.build
+1 -4
View File
@@ -35,10 +35,7 @@ executables += [
'sources' : timesyncd_sources,
'extract' : timesyncd_extract_sources,
'link_with' : timesyncd_link_with,
'dependencies' : [
libm,
threads,
],
'dependencies' : libm,
},
libexec_template + {
'name' : 'systemd-time-wait-sync',
src/udev/meson.build
-2
View File
@@ -122,7 +122,6 @@ udev_dependencies = [
libblkid_cflags,
libkmod_cflags,
libmount_cflags,
threads,
]
udev_plugin_template = executable_template + {
@@ -138,7 +137,6 @@ udev_common_template = {
'dependencies' : [
libacl_cflags,
libblkid_cflags,
threads,
],
}
udev_test_template = test_template + udev_common_template
src/userdb/meson.build
-3
View File
@@ -5,7 +5,6 @@ executables += [
'name' : 'systemd-userwork',
'conditions' : ['ENABLE_USERDB'],
'sources' : files('userwork.c'),
'dependencies' : threads,
},
libexec_template + {
'name' : 'systemd-userdbd',
@@ -14,13 +13,11 @@ executables += [
'userdbd-manager.c',
'userdbd.c',
),
'dependencies' : threads,
},
executable_template + {
'name' : 'userdbctl',
'conditions' : ['ENABLE_USERDB'],
'sources' : files('userdbctl.c'),
'dependencies' : threads,
},
]