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build: meson: generate and use a linker script for NM binary

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Generate the NetworkManager.ver link script to link the NM binary so
that unneeded symbol are unexported and can be dropped, reducing the
binary size.

Reported-by: Michael Biebl <biebl@debian.org>
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/issues/33
(cherry picked from commit dfa2a2b40c)
This commit is contained in:
Beniamino Galvani 2018-09-11 14:12:10 +02:00
parent 10ca2444b9
commit ec123d3bf4
1 changed files with 33 additions and 47 deletions
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80
src/meson.build
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@ -143,7 +143,7 @@ sources = files(
'nm-sleep-monitor.c'
)
deps = [
nm_deps = [
dl_dep,
libndp_dep,
libudev_dep,
@ -153,70 +153,29 @@ deps = [
]
if enable_concheck
deps += libcurl_dep
nm_deps += libcurl_dep
endif
if enable_libaudit
deps += libaudit_dep
nm_deps += libaudit_dep
endif
if enable_libpsl
deps += libpsl_dep
nm_deps += libpsl_dep
endif
if enable_selinux
deps += selinux_dep
nm_deps += selinux_dep
endif
libnetwork_manager = static_library(
nm_name,
sources: sources,
dependencies: deps,
dependencies: nm_deps,
c_args: cflags,
link_with: [libnetwork_manager_base, libsystemd_nm]
)
ldflags = ['-rdynamic']
# FIXME: this doesn't work and it depends on libtool
'''
src/NetworkManager.ver: src/libNetworkManager.la $(core_plugins)
$(AM_V_GEN) NM="$(NM)" "$(srcdir)/tools/create-exports-NetworkManager.sh" --called-from-make "$(srcdir)"
src_NetworkManager_LDFLAGS = \
-rdynamic \
-Wl,--version-script="src/NetworkManager.ver"
nm = find_program('gcc-nm', 'nm')
create_exports_networkmanager = join_paths(meson.source_root(), 'tools', 'create-exports-NetworkManager.sh')
symbol_map_name = 'NetworkManager.ver'
linker_script = custom_target(
symbol_map_name,
input: meson.source_root(),
output: symbol_map_name,
capture: true,
#command: ['NM=' + nm.path(), create_exports_networkmanager, '--called-from-make', '@INPUT@']
command: [create_exports_networkmanager, '--called-from-make', '@INPUT@']
)
ldflags += '-Wl,--version-script,@0@'.format(linker_script)
'''
network_manager = executable(
nm_name,
'main.c',
dependencies: deps,
c_args: cflags,
link_with: libnetwork_manager,
link_args: ldflags,
#FIXME
#link_depends: linker_script,
install: true,
install_dir: nm_sbindir
)
deps = [
dl_dep,
libndp_dep,
@ -287,3 +246,30 @@ endif
subdir('devices')
subdir('settings/plugins')
# NetworkManager binary
create_exports_networkmanager = join_paths(meson.source_root(), 'tools', 'create-exports-NetworkManager.sh')
symbol_map_name = 'NetworkManager.ver'
ver_script = custom_target(
symbol_map_name,
input: meson.source_root(),
output: symbol_map_name,
depends: [ libnetwork_manager, core_plugins ],
command: [create_exports_networkmanager, '--called-from-build', '@INPUT@']
)
ldflags = ['-rdynamic', '-Wl,--version-script,@0@'.format(ver_script.full_path())]
network_manager = executable(
nm_name,
'main.c',
dependencies: nm_deps,
c_args: nm_cflags,
link_with: libnetwork_manager,
link_args: ldflags,
link_depends: ver_script,
install: true,
install_dir: nm_sbindir
)