meson: use booleans for conf.set and drop unecessary conditionals

Using conf.set() with a boolean argument does the right thing:
either #ifdef or #undef. This means that conf.set can be used unconditionally.

Previously I used '1' as the placeholder value, and that needs to be changed to
'true' for consistency (under meson 1 cannot be used in boolean context). All
checks need to be adjusted.

29 files changed, 140 insertions, 170 deletions

diff --git a/docs/sysvinit/meson.build b/docs/sysvinit/meson.build
index a8f5b519a3..79d1babf16 100644
--- a/docs/sysvinit/meson.build
+++ b/docs/sysvinit/meson.build
@@ -3,7 +3,7 @@ file = configure_file(
         output : 'README',
         configuration : substs)
 
-if conf.get('HAVE_SYSV_COMPAT', 0) == 1
+if conf.get('HAVE_SYSV_COMPAT', false)
         install_data(file,
                      install_dir : sysvinit_path)
 endif
diff --git a/docs/var-log/meson.build b/docs/var-log/meson.build
index c833f0f5b0..d8364e38b9 100644
--- a/docs/var-log/meson.build
+++ b/docs/var-log/meson.build
@@ -3,7 +3,7 @@ file = configure_file(
         output : 'README',
         configuration : substs)
 
-if conf.get('HAVE_SYSV_COMPAT', 0) == 1
+if conf.get('HAVE_SYSV_COMPAT', false)
         install_data(file,
                      install_dir : varlogdir)
 endif
diff --git a/hwdb/meson.build b/hwdb/meson.build
index 68a23e0afe..1f018111ed 100644
--- a/hwdb/meson.build
+++ b/hwdb/meson.build
@@ -17,7 +17,7 @@ hwdb_files = files('''
         70-touchpad.hwdb
 '''.split())
 
-if conf.get('ENABLE_HWDB', 0) == 1
+if conf.get('ENABLE_HWDB', false)
         install_data(hwdb_files,
                      install_dir : udevhwdbdir)
 
diff --git a/man/meson.build b/man/meson.build
index 9cdb560c4c..6f7b1e8793 100644
--- a/man/meson.build
+++ b/man/meson.build
@@ -50,7 +50,7 @@ foreach tuple : manpages
 
         mandirn = join_paths(get_option('mandir'), 'man' + section)
 
-        if condition == '' or conf.get(condition, 0) == 1
+        if condition == '' or conf.get(condition, false)
                 p1 = custom_target(
                         man,
                         input : xml,
diff --git a/meson.build b/meson.build
index cb9713c0ae..14a20530d4 100644
--- a/meson.build
+++ b/meson.build
@@ -28,7 +28,7 @@ m4_defines = []
 
 rootprefixdir = get_option('rootprefix')
 if get_option('split-usr')
-        conf.set('HAVE_SPLIT_USR', 1)
+        conf.set('HAVE_SPLIT_USR', true)
         rootprefixdir = rootprefixdir != '' ? rootprefixdir : '/'
 else
         rootprefixdir = rootprefixdir != '' ? rootprefixdir : '/usr'
@@ -37,7 +37,7 @@ endif
 sysvinit_path = get_option('sysvinit-path')
 sysvrcnd_path = get_option('sysvrcnd-path')
 if sysvinit_path != '' or sysvrcnd_path != ''
-        conf.set('HAVE_SYSV_COMPAT', 1,
+        conf.set('HAVE_SYSV_COMPAT', true,
                  description : 'SysV init scripts and rcN.d links are supported')
         m4_defines += ['-DHAVE_SYSV_COMPAT']
 endif
@@ -343,8 +343,8 @@ cpp = ' '.join(cc.cmd_array()) + ' -E'
 #####################################################################
 # compilation result tests
 
-conf.set('_GNU_SOURCE', 1)
-conf.set('__SANE_USERSPACE_TYPES__', 1)
+conf.set('_GNU_SOURCE', true)
+conf.set('__SANE_USERSPACE_TYPES__', true)
 
 conf.set('SIZEOF_PID_T', cc.sizeof('pid_t', prefix : '#include <sys/types.h>'))
 conf.set('SIZEOF_UID_T', cc.sizeof('uid_t', prefix : '#include <sys/types.h>'))
@@ -365,10 +365,10 @@ foreach decl : ['char16_t',
                 'key_serial_t',
                 'struct ethtool_link_settings',
                ]
-        if cc.sizeof(decl, prefix : decl_headers) > 0
-                # We get -1 if the size cannot be determined
-                conf.set('HAVE_' + decl.underscorify().to_upper(), 1)
-        endif
+
+        # We get -1 if the size cannot be determined
+        have = cc.sizeof(decl, prefix : decl_headers) > 0
+        conf.set('HAVE_' + decl.underscorify().to_upper(), have)
 endforeach
 
 foreach decl : [['IFLA_INET6_ADDR_GEN_MODE',         'linux/if_link.h'],
@@ -402,7 +402,7 @@ endforeach
 skip = false
 foreach ident : ['secure_getenv', '__secure_getenv']
         if not skip and cc.has_function(ident)
-                conf.set('HAVE_' + ident.to_upper(), 1)
+                conf.set('HAVE_' + ident.to_upper(), true)
                 skip = true
         endif
 endforeach
@@ -431,8 +431,8 @@ foreach ident : [
 endforeach
 
 if cc.has_function('getrandom', prefix : '''#include <sys/random.h>''')
-        conf.set('USE_SYS_RANDOM_H', 1)
-        conf.set10('HAVE_DECL_GETRANDOM', 1)
+        conf.set('USE_SYS_RANDOM_H', true)
+        conf.set10('HAVE_DECL_GETRANDOM', true)
 else
         have = cc.has_function('getrandom', prefix : '''#include <linux/random.h>''')
         conf.set10('HAVE_DECL_GETRANDOM', have)
@@ -524,9 +524,9 @@ foreach header : ['linux/btrfs.h',
                   'valgrind/memcheck.h',
                   'valgrind/valgrind.h',
                  ]
-        if cc.has_header(header)
-                conf.set('HAVE_' + header.underscorify().to_upper(), 1)
-        endif
+
+        conf.set('HAVE_' + header.underscorify().to_upper(),
+                 cc.has_header(header))
 endforeach
 
 ############################################################
@@ -619,9 +619,9 @@ debug = get_option('debug')
 if debug != ''
         foreach name : debug.split(',')
                 if name == 'hashmap'
-                        conf.set('ENABLE_DEBUG_HASHMAP', 1)
+                        conf.set('ENABLE_DEBUG_HASHMAP', true)
                 elif name == 'mmap-cache'
-                        conf.set('ENABLE_DEBUG_MMAP_CACHE', 1)
+                        conf.set('ENABLE_DEBUG_MMAP_CACHE', true)
                 else
                         message('unknown debug option "@0@", ignoring'.format(name))
                 endif
@@ -651,7 +651,7 @@ if want_seccomp != 'false'
                                 version : '>= 2.3.1',
                                 required : want_seccomp == 'true')
         if libseccomp.found()
-                conf.set('HAVE_SECCOMP', 1)
+                conf.set('HAVE_SECCOMP', true)
                 m4_defines += ['-DHAVE_SECCOMP']
         endif
 else
@@ -664,7 +664,7 @@ if want_selinux != 'false'
                                 version : '>= 2.1.9',
                                 required : want_selinux == 'true')
         if libselinux.found()
-                conf.set('HAVE_SELINUX', 1)
+                conf.set('HAVE_SELINUX', true)
                 m4_defines += ['-DHAVE_SELINUX']
         endif
 else
@@ -676,7 +676,7 @@ if want_apparmor != 'false'
         libapparmor = dependency('libapparmor',
                                  required : want_apparmor == 'true')
         if libapparmor.found()
-                conf.set('HAVE_APPARMOR', 1)
+                conf.set('HAVE_APPARMOR', true)
                 m4_defines += ['-DHAVE_APPARMOR']
         endif
 else
@@ -693,7 +693,7 @@ want_polkit = get_option('polkit')
 install_polkit = false
 install_polkit_pkla = false
 if want_polkit != 'false'
-        conf.set('ENABLE_POLKIT', 1)
+        conf.set('ENABLE_POLKIT', true)
         install_polkit = true
 
         libpolkit = dependency('polkit-gobject-1',
@@ -708,7 +708,7 @@ want_acl = get_option('acl')
 if want_acl != 'false'
         libacl = cc.find_library('acl', required : want_acl == 'true')
         if libacl.found()
-                conf.set('HAVE_ACL', 1)
+                conf.set('HAVE_ACL', true)
                 m4_defines += ['-DHAVE_ACL']
         endif
 else
@@ -718,9 +718,7 @@ endif
 want_audit = get_option('audit')
 if want_audit != 'false'
         libaudit = dependency('audit', required : want_audit == 'true')
-        if libaudit.found()
-                conf.set('HAVE_AUDIT', 1)
-        endif
+        conf.set('HAVE_AUDIT', libaudit.found())
 else
         libaudit = []
 endif
@@ -728,9 +726,7 @@ endif
 want_blkid = get_option('blkid')
 if want_blkid != 'false'
         libblkid = dependency('blkid', required : want_blkid == 'true')
-        if libblkid.found()
-                conf.set('HAVE_BLKID', 1)
-        endif
+        conf.set('HAVE_BLKID', libblkid.found())
 else
         libblkid = []
 endif
@@ -740,9 +736,7 @@ if want_kmod != 'false'
         libkmod = dependency('libkmod',
                              version : '>= 15',
                              required : want_kmod == 'true')
-        if libkmod.found()
-                conf.set('HAVE_KMOD', 1)
-        endif
+        conf.set('HAVE_KMOD', libkmod.found())
 else
         libkmod = []
 endif
@@ -752,7 +746,7 @@ if want_pam != 'false'
         libpam = cc.find_library('pam', required : want_pam == 'true')
         libpam_misc = cc.find_library('pam_misc', required : want_pam == 'true')
         if libpam.found() and libpam_misc.found()
-                conf.set('HAVE_PAM', 1)
+                conf.set('HAVE_PAM', true)
                 m4_defines += ['-DHAVE_PAM']
         endif
 else
@@ -766,7 +760,7 @@ if want_microhttpd != 'false'
                                    version : '>= 0.9.33',
                                    required : want_microhttpd == 'true')
         if libmicrohttpd.found()
-                conf.set('HAVE_MICROHTTPD', 1)
+                conf.set('HAVE_MICROHTTPD', true)
                 m4_defines += ['-DHAVE_MICROHTTPD']
         endif
 else
@@ -778,9 +772,7 @@ if want_libcryptsetup != 'false'
         libcryptsetup = dependency('libcryptsetup',
                                    version : '>= 1.6.0',
                                    required : want_libcryptsetup == 'true')
-        if libcryptsetup.found()
-                conf.set('HAVE_LIBCRYPTSETUP', 1)
-        endif
+        conf.set('HAVE_LIBCRYPTSETUP', libcryptsetup.found())
 else
         libcryptsetup = []
 endif
@@ -791,7 +783,7 @@ if want_libcurl != 'false'
                              version : '>= 7.32.0',
                              required : want_libcurl == 'true')
         if libcurl.found()
-                conf.set('HAVE_LIBCURL', 1)
+                conf.set('HAVE_LIBCURL', true)
                 m4_defines += ['-DHAVE_LIBCURL']
         endif
 else
@@ -803,7 +795,7 @@ if want_libidn != 'false'
         libidn = dependency('libidn',
                             required : want_libidn == 'true')
         if libidn.found()
-                conf.set('HAVE_LIBIDN', 1)
+                conf.set('HAVE_LIBIDN', true)
                 m4_defines += ['-DHAVE_LIBIDN']
         endif
 else
@@ -815,7 +807,7 @@ if want_libiptc != 'false'
         libiptc = dependency('libiptc',
                              required : want_libiptc == 'true')
         if libiptc.found()
-                conf.set('HAVE_LIBIPTC', 1)
+                conf.set('HAVE_LIBIPTC', true)
                 m4_defines += ['-DHAVE_LIBIPTC']
         endif
 else
@@ -826,9 +818,7 @@ want_qrencode = get_option('qrencode')
 if want_qrencode != 'false'
         libqrencode = dependency('libqrencode',
                                  required : want_qrencode == 'true')
-        if libqrencode.found()
-                conf.set('HAVE_QRENCODE', 1)
-        endif
+        conf.set('HAVE_QRENCODE', libqrencode.found())
 else
         libqrencode = []
 endif
@@ -838,9 +828,7 @@ if want_gnutls != 'false'
         libgnutls = dependency('gnutls',
                                version : '>= 3.1.4',
                                required : want_gnutls == 'true')
-        if libgnutls.found()
-                conf.set('HAVE_GNUTLS', 1)
-        endif
+        conf.set('HAVE_GNUTLS', libgnutls.found())
 else
         libgnutls = []
 endif
@@ -849,9 +837,7 @@ want_elfutils = get_option('elfutils')
 if want_elfutils != 'false'
         libdw = dependency('libdw',
                            required : want_elfutils == 'true')
-        if libdw.found()
-                conf.set('HAVE_ELFUTILS', 1)
-        endif
+        conf.set('HAVE_ELFUTILS', libdw.found())
 else
         libdw = []
 endif
@@ -860,9 +846,7 @@ want_zlib = get_option('zlib')
 if want_zlib != 'false'
         libz = dependency('zlib',
                           required : want_zlib == 'true')
-        if libz.found()
-                conf.set('HAVE_ZLIB', 1)
-        endif
+        conf.set('HAVE_ZLIB', libz.found())
 else
         libz = []
 endif
@@ -871,9 +855,7 @@ want_bzip2 = get_option('bzip2')
 if want_bzip2 != 'false'
         libbzip2 = cc.find_library('bz2',
                                    required : want_bzip2 == 'true')
-        if libbzip2.found()
-                conf.set('HAVE_BZIP2', 1)
-        endif
+        conf.set('HAVE_BZIP2', libbzip2.found())
 else
         libbzip2 = []
 endif
@@ -882,9 +864,7 @@ want_xz = get_option('xz')
 if want_xz != 'false'
         libxz = dependency('liblzma',
                            required : want_xz == 'true')
-        if libxz.found()
-                conf.set('HAVE_XZ', 1)
-        endif
+        conf.set('HAVE_XZ', libxz.found())
 else
         libxz = []
 endif
@@ -893,9 +873,7 @@ want_lz4 = get_option('lz4')
 if want_lz4 != 'false'
         liblz4 = dependency('liblz4',
                             required : want_lz4 == 'true')
-        if liblz4.found()
-                conf.set('HAVE_LZ4', 1)
-        endif
+        conf.set('HAVE_LZ4', liblz4.found())
 else
         liblz4 = []
 endif
@@ -910,9 +888,8 @@ if want_glib != 'false'
                                 required : want_glib == 'true')
         libgio =     dependency('gio-2.0',
                                 required : want_glib == 'true')
-        if libglib.found() and libgobject.found() and libgio.found()
-                conf.set('HAVE_GLIB', 1)
-        endif
+        have = libglib.found() and libgobject.found() and libgio.found()
+        conf.set('HAVE_GLIB', have)
 else
         libglib = []
         libgobject = []
@@ -924,9 +901,7 @@ if want_xkbcommon != 'false'
         libxkbcommon = dependency('xkbcommon',
                                   version : '>= 0.3.0',
                                   required : want_xkbcommon == 'true')
-        if libxkbcommon.found()
-                conf.set('HAVE_XKBCOMMON', 1)
-        endif
+        conf.set('HAVE_XKBCOMMON', libxkbcommon.found())
 else
         libxkbcommon = []
 endif
@@ -936,9 +911,7 @@ if want_dbus != 'false'
         libdbus = dependency('dbus-1',
                              version : '>= 1.3.2',
                              required : want_dbus == 'true')
-        if libdbus.found()
-                conf.set('HAVE_DBUS', 1)
-        endif
+        conf.set('HAVE_DBUS', libdbus.found())
 else
         libdbus = []
 endif
@@ -948,9 +921,9 @@ if want_gcrypt != 'false'
         libgcrypt = cc.find_library('gcrypt', required : want_gcrypt == 'true')
         libgpg_error = cc.find_library('gpg-error', required : want_gcrypt == 'true')
 
-        if libgcrypt.found() and libgpg_error.found()
-                conf.set('HAVE_GCRYPT', 1)
-        else
+        have_deps = libgcrypt.found() and libgpg_error.found()
+        conf.set('HAVE_GCRYPT', have_deps)
+        if not have_deps
                 # link to neither of the libs if one is not found
                 libgcrypt = []
                 libgpg_error = []
@@ -962,22 +935,21 @@ endif
 
 want_importd = get_option('importd')
 if want_importd != 'false'
-        have_deps = (conf.get('HAVE_LIBCURL', 0) == 1 and
-                     conf.get('HAVE_ZLIB', 0) == 1 and
-                     conf.get('HAVE_BZIP2', 0) == 1 and
-                     conf.get('HAVE_XZ', 0) == 1 and
-                     conf.get('HAVE_GCRYPT', 0) == 1)
-        if have_deps
-                conf.set('ENABLE_IMPORTD', 1)
-        elif want_importd == 'true'
+        have_deps = (conf.get('HAVE_LIBCURL', false) and
+                     conf.get('HAVE_ZLIB', false) and
+                     conf.get('HAVE_BZIP2', false) and
+                     conf.get('HAVE_XZ', false) and
+                     conf.get('HAVE_GCRYPT', false))
+        conf.set('ENABLE_IMPORTD', have_deps)
+        if want_importd == 'true' and not have_deps
                 error('importd support was requested, but dependencies are not available')
         endif
 endif
 
 want_remote = get_option('remote')
 if want_remote != 'false'
-        have_deps = [conf.get('HAVE_MICROHTTPD', 0) == 1,
-                     conf.get('HAVE_LIBCURL', 0) == 1]
+        have_deps = [conf.get('HAVE_MICROHTTPD', false),
+                     conf.get('HAVE_LIBCURL', false)]
         # sd-j-remote requires µhttpd, and sd-j-upload requires libcurl, so
         # it's possible to build one without the other. Complain only if
         # support was explictly requested. The auxiliary files like sysusers
@@ -985,9 +957,7 @@ if want_remote != 'false'
         if want_remote == 'true' and not (have_deps[0] and have_deps[1])
                 error('remote support was requested, but dependencies are not available')
         endif
-        if have_deps[0] or have_deps[1]
-                conf.set('ENABLE_REMOTE', 1)
-        endif
+        conf.set('ENABLE_REMOTE', have_deps[0] or have_deps[1])
 endif
 
 foreach pair : [['utmp',          'HAVE_UTMP'],
@@ -1021,7 +991,7 @@ foreach pair : [['utmp',          'HAVE_UTMP'],
                ]
 
         if get_option(pair[0])
-                conf.set(pair[1], 1)
+                conf.set(pair[1], true)
                 m4_defines += ['-D' + pair[1]]
         endif
 endforeach
@@ -1052,7 +1022,7 @@ if get_option('efi')
                 gnu_efi_arch = ''
         endif
 
-        conf.set('ENABLE_EFI', 1)
+        conf.set('ENABLE_EFI', true)
         conf.set_quoted('EFI_MACHINE_TYPE_NAME', EFI_MACHINE_TYPE_NAME)
 
         conf.set('SD_TPM_PCR', get_option('tpm-pcrindex').to_int())
@@ -1170,7 +1140,7 @@ foreach tuple : [['myhostname', 'HAVE_MYHOSTNAME', []],
                  ['mymachines', 'ENABLE_MACHINED', []],
                  ['resolve',    'ENABLE_RESOLVED', [libdl]]]
 
-        condition = tuple[1] == '' or conf.get(tuple[1], 0) == 1
+        condition = tuple[1] == '' or conf.get(tuple[1], false)
         if condition
                 module = tuple[0]
                 extra_deps = tuple[2]
@@ -1299,7 +1269,7 @@ executable('systemd-fstab-generator',
            install : true,
            install_dir : systemgeneratordir)
 
-if conf.get('ENABLE_ENVIRONMENT_D', 0) == 1
+if conf.get('ENABLE_ENVIRONMENT_D', false)
         executable('30-systemd-environment-d-generator',
                    'src/environment-d-generator/environment-d-generator.c',
                    include_directories : includes,
@@ -1313,7 +1283,7 @@ if conf.get('ENABLE_ENVIRONMENT_D', 0) == 1
                                  join_paths(environmentdir, '99-environment.conf'))
 endif
 
-if conf.get('ENABLE_HIBERNATE', 0) == 1
+if conf.get('ENABLE_HIBERNATE', false)
         executable('systemd-hibernate-resume-generator',
                    'src/hibernate-resume/hibernate-resume-generator.c',
                    include_directories : includes,
@@ -1331,7 +1301,7 @@ if conf.get('ENABLE_HIBERNATE', 0) == 1
                    install_dir : rootlibexecdir)
 endif
 
-if conf.get('HAVE_BLKID', 0) == 1
+if conf.get('HAVE_BLKID', false)
         executable('systemd-gpt-auto-generator',
                    'src/gpt-auto-generator/gpt-auto-generator.c',
                    'src/basic/blkid-util.h',
@@ -1352,7 +1322,7 @@ if conf.get('HAVE_BLKID', 0) == 1
         public_programs += [exe]
 endif
 
-if conf.get('ENABLE_RESOLVED', 0) == 1
+if conf.get('ENABLE_RESOLVED', false)
         executable('systemd-resolved',
                    systemd_resolved_sources,
                    gcrypt_util_sources,
@@ -1382,7 +1352,7 @@ if conf.get('ENABLE_RESOLVED', 0) == 1
         public_programs += [exe]
 endif
 
-if conf.get('ENABLE_LOGIND', 0) == 1
+if conf.get('ENABLE_LOGIND', false)
         executable('systemd-logind',
                    systemd_logind_sources,
                    include_directories : includes,
@@ -1415,7 +1385,7 @@ if conf.get('ENABLE_LOGIND', 0) == 1
                          install_dir : rootbindir)
         public_programs += [exe]
 
-        if conf.get('HAVE_PAM', 0) == 1
+        if conf.get('HAVE_PAM', false)
                 version_script_arg = join_paths(meson.current_source_dir(), pam_systemd_sym)
                 pam_systemd = shared_library(
                         'pam_systemd',
@@ -1439,7 +1409,7 @@ if conf.get('ENABLE_LOGIND', 0) == 1
         endif
 endif
 
-if conf.get('HAVE_PAM', 0) == 1
+if conf.get('HAVE_PAM', false)
         executable('systemd-user-sessions',
                    'src/user-sessions/user-sessions.c',
                    include_directories : includes,
@@ -1449,7 +1419,7 @@ if conf.get('HAVE_PAM', 0) == 1
                    install_dir : rootlibexecdir)
 endif
 
-if conf.get('ENABLE_EFI', 0) == 1 and conf.get('HAVE_BLKID', 0) == 1
+if conf.get('ENABLE_EFI', false) and conf.get('HAVE_BLKID', false)
         exe = executable('bootctl',
                          'src/boot/bootctl.c',
                          include_directories : includes,
@@ -1481,7 +1451,7 @@ exe = executable('systemctl', 'src/systemctl/systemctl.c',
                  install_dir : rootbindir)
 public_programs += [exe]
 
-if conf.get('ENABLE_BACKLIGHT', 0) == 1
+if conf.get('ENABLE_BACKLIGHT', false)
         executable('systemd-backlight',
                    'src/backlight/backlight.c',
                    include_directories : includes,
@@ -1491,7 +1461,7 @@ if conf.get('ENABLE_BACKLIGHT', 0) == 1
                    install_dir : rootlibexecdir)
 endif
 
-if conf.get('ENABLE_RFKILL', 0) == 1
+if conf.get('ENABLE_RFKILL', false)
         executable('systemd-rfkill',
                    'src/rfkill/rfkill.c',
                    include_directories : includes,
@@ -1509,7 +1479,7 @@ executable('systemd-system-update-generator',
            install : true,
            install_dir : systemgeneratordir)
 
-if conf.get('HAVE_LIBCRYPTSETUP', 0) == 1
+if conf.get('HAVE_LIBCRYPTSETUP', false)
         executable('systemd-cryptsetup',
                    'src/cryptsetup/cryptsetup.c',
                    include_directories : includes,
@@ -1547,7 +1517,7 @@ if conf.get('HAVE_LIBCRYPTSETUP', 0) == 1
                    install_dir : systemgeneratordir)
 endif
 
-if conf.get('HAVE_SYSV_COMPAT', 0) == 1
+if conf.get('HAVE_SYSV_COMPAT', false)
         executable('systemd-sysv-generator',
                    'src/sysv-generator/sysv-generator.c',
                    include_directories : includes,
@@ -1565,7 +1535,7 @@ if conf.get('HAVE_SYSV_COMPAT', 0) == 1
                    install_dir : systemgeneratordir)
 endif
 
-if conf.get('ENABLE_HOSTNAMED', 0) == 1
+if conf.get('ENABLE_HOSTNAMED', false)
         executable('systemd-hostnamed',
                    'src/hostname/hostnamed.c',
                    include_directories : includes,
@@ -1583,8 +1553,8 @@ if conf.get('ENABLE_HOSTNAMED', 0) == 1
         public_programs += [exe]
 endif
 
-if conf.get('ENABLE_LOCALED', 0) == 1
-        if conf.get('HAVE_XKBCOMMON', 0) == 1
+if conf.get('ENABLE_LOCALED', false)
+        if conf.get('HAVE_XKBCOMMON', false)
                 # logind will load libxkbcommon.so dynamically on its own
                 deps = [libdl]
         else
@@ -1609,7 +1579,7 @@ if conf.get('ENABLE_LOCALED', 0) == 1
         public_programs += [exe]
 endif
 
-if conf.get('ENABLE_TIMEDATED', 0) == 1
+if conf.get('ENABLE_TIMEDATED', false)
         executable('systemd-timedated',
                    'src/timedate/timedated.c',
                    include_directories : includes,
@@ -1627,7 +1597,7 @@ if conf.get('ENABLE_TIMEDATED', 0) == 1
         public_programs += [exe]
 endif
 
-if conf.get('ENABLE_TIMESYNCD', 0) == 1
+if conf.get('ENABLE_TIMESYNCD', false)
         executable('systemd-timesyncd',
                    systemd_timesyncd_sources,
                    include_directories : includes,
@@ -1639,7 +1609,7 @@ if conf.get('ENABLE_TIMESYNCD', 0) == 1
                    install_dir : rootlibexecdir)
 endif
 
-if conf.get('ENABLE_MACHINED', 0) == 1
+if conf.get('ENABLE_MACHINED', false)
         executable('systemd-machined',
                    systemd_machined_sources,
                    include_directories : includes,
@@ -1662,7 +1632,7 @@ if conf.get('ENABLE_MACHINED', 0) == 1
         public_programs += [exe]
 endif
 
-if conf.get('ENABLE_IMPORTD', 0) == 1
+if conf.get('ENABLE_IMPORTD', false)
         executable('systemd-importd',
                    systemd_importd_sources,
                    include_directories : includes,
@@ -1711,7 +1681,7 @@ if conf.get('ENABLE_IMPORTD', 0) == 1
         public_programs += [systemd_pull, systemd_import, systemd_export]
 endif
 
-if conf.get('ENABLE_REMOTE', 0) == 1 and conf.get('HAVE_LIBCURL', 0) == 1
+if conf.get('ENABLE_REMOTE', false) and conf.get('HAVE_LIBCURL', false)
         exe = executable('systemd-journal-upload',
                          systemd_journal_upload_sources,
                          include_directories : includes,
@@ -1727,7 +1697,7 @@ if conf.get('ENABLE_REMOTE', 0) == 1 and conf.get('HAVE_LIBCURL', 0) == 1
         public_programs += [exe]
 endif
 
-if conf.get('ENABLE_REMOTE', 0) == 1 and conf.get('HAVE_MICROHTTPD', 0) == 1
+if conf.get('ENABLE_REMOTE', false) and conf.get('HAVE_MICROHTTPD', false)
         s_j_remote = executable('systemd-journal-remote',
                                 systemd_journal_remote_sources,
                                 include_directories : includes,
@@ -1756,7 +1726,7 @@ if conf.get('ENABLE_REMOTE', 0) == 1 and conf.get('HAVE_MICROHTTPD', 0) == 1
         public_programs += [s_j_remote, s_j_gatewayd]
 endif
 
-if conf.get('ENABLE_COREDUMP', 0) == 1
+if conf.get('ENABLE_COREDUMP', false)
         executable('systemd-coredump',
                    systemd_coredump_sources,
                    include_directories : includes,
@@ -1782,7 +1752,7 @@ if conf.get('ENABLE_COREDUMP', 0) == 1
         public_programs += [exe]
 endif
 
-if conf.get('ENABLE_BINFMT', 0) == 1
+if conf.get('ENABLE_BINFMT', false)
         exe = executable('systemd-binfmt',
                          'src/binfmt/binfmt.c',
                          include_directories : includes,
@@ -1798,7 +1768,7 @@ if conf.get('ENABLE_BINFMT', 0) == 1
                                  mkdir_p.format(join_paths(sysconfdir, 'binfmt.d')))
 endif
 
-if conf.get('ENABLE_VCONSOLE', 0) == 1
+if conf.get('ENABLE_VCONSOLE', false)
         executable('systemd-vconsole-setup',
                    'src/vconsole/vconsole-setup.c',
                    include_directories : includes,
@@ -1808,7 +1778,7 @@ if conf.get('ENABLE_VCONSOLE', 0) == 1
                    install_dir : rootlibexecdir)
 endif
 
-if conf.get('ENABLE_RANDOMSEED', 0) == 1
+if conf.get('ENABLE_RANDOMSEED', false)
         executable('systemd-random-seed',
                    'src/random-seed/random-seed.c',
                    include_directories : includes,
@@ -1818,7 +1788,7 @@ if conf.get('ENABLE_RANDOMSEED', 0) == 1
                    install_dir : rootlibexecdir)
 endif
 
-if conf.get('ENABLE_FIRSTBOOT', 0) == 1
+if conf.get('ENABLE_FIRSTBOOT', false)
         executable('systemd-firstboot',
                    'src/firstboot/firstboot.c',
                    include_directories : includes,
@@ -2027,7 +1997,7 @@ exe = executable('busctl',
                  install : true)
 public_programs += [exe]
 
-if conf.get('ENABLE_SYSUSERS', 0) == 1
+if conf.get('ENABLE_SYSUSERS', false)
         exe = executable('systemd-sysusers',
                          'src/sysusers/sysusers.c',
                          include_directories : includes,
@@ -2038,7 +2008,7 @@ if conf.get('ENABLE_SYSUSERS', 0) == 1
         public_programs += [exe]
 endif
 
-if conf.get('ENABLE_TMPFILES', 0) == 1
+if conf.get('ENABLE_TMPFILES', false)
         exe = executable('systemd-tmpfiles',
                          'src/tmpfiles/tmpfiles.c',
                          include_directories : includes,
@@ -2050,7 +2020,7 @@ if conf.get('ENABLE_TMPFILES', 0) == 1
         public_programs += [exe]
 endif
 
-if conf.get('ENABLE_HWDB', 0) == 1
+if conf.get('ENABLE_HWDB', false)
         exe = executable('systemd-hwdb',
                          'src/hwdb/hwdb.c',
                          'src/libsystemd/sd-hwdb/hwdb-internal.h',
@@ -2062,7 +2032,7 @@ if conf.get('ENABLE_HWDB', 0) == 1
         public_programs += [exe]
 endif
 
-if conf.get('ENABLE_QUOTACHECK', 0) == 1
+if conf.get('ENABLE_QUOTACHECK', false)
         executable('systemd-quotacheck',
                    'src/quotacheck/quotacheck.c',
                    include_directories : includes,
@@ -2139,7 +2109,7 @@ executable('systemd-update-utmp',
            install : true,
            install_dir : rootlibexecdir)
 
-if conf.get('HAVE_KMOD', 0) == 1
+if conf.get('HAVE_KMOD', false)
         executable('systemd-modules-load',
                    'src/modules-load/modules-load.c',
                    include_directories : includes,
@@ -2171,7 +2141,7 @@ exe = executable('systemd-nspawn',
                  install : true)
 public_programs += [exe]
 
-if conf.get('ENABLE_NETWORKD', 0) == 1
+if conf.get('ENABLE_NETWORKD', false)
         executable('systemd-networkd',
                    systemd_networkd_sources,
                    include_directories : includes,
@@ -2221,7 +2191,7 @@ foreach tuple : tests
                 type = ''
         endif
 
-        if condition == '' or conf.get(condition, 0) == 1
+        if condition == '' or conf.get(condition, false)
                 install = install_tests and type == ''
 
                 exe = executable(
@@ -2422,7 +2392,7 @@ status += [
 # CPPFLAGS: ${OUR_CPPFLAGS} ${CPPFLAGS}
 # LDFLAGS:  ${OUR_LDFLAGS} ${LDFLAGS}
 
-if conf.get('ENABLE_EFI', 0) == 1
+if conf.get('ENABLE_EFI', false)
         status += [
                 'efi arch:                          @0@'.format(efi_arch)]
 
@@ -2490,13 +2460,13 @@ foreach tuple : [
         ['blkid'],
         ['dbus'],
         ['glib'],
-        ['nss-myhostname',   conf.get('HAVE_MYHOSTNAME', 0) == 1],
+        ['nss-myhostname',   conf.get('HAVE_MYHOSTNAME', false)],
         ['hwdb'],
         ['tpm'],
         ['man pages',        want_man],
         ['html pages',       want_html],
         ['man page indices', want_man and have_lxml],
-        ['split /usr',       conf.get('HAVE_SPLIT_USR', 0) == 1],
+        ['split /usr',       conf.get('HAVE_SPLIT_USR', false)],
         ['SysV compat'],
         ['utmp'],
         ['ldconfig'],
@@ -2511,7 +2481,7 @@ foreach tuple : [
         if cond == ''
                 ident1 = 'HAVE_' + tuple[0].underscorify().to_upper()
                 ident2 = 'ENABLE_' + tuple[0].underscorify().to_upper()
-                cond = conf.get(ident1, 0) == 1 or conf.get(ident2, 0) == 1
+                cond = conf.get(ident1, false) or conf.get(ident2, false)
         endif
         if cond
                 found += [tuple[0]]
diff --git a/network/meson.build b/network/meson.build
index f7d73f2db0..e9f9bbae42 100644
--- a/network/meson.build
+++ b/network/meson.build
@@ -1,4 +1,4 @@
-if conf.get('ENABLE_NETWORKD', 0) == 1
+if conf.get('ENABLE_NETWORKD', false)
         install_data('80-container-host0.network',
                      '80-container-ve.network',
                      '80-container-vz.network',
diff --git a/shell-completion/bash/meson.build b/shell-completion/bash/meson.build
index 8c2eada6cb..9399661845 100644
--- a/shell-completion/bash/meson.build
+++ b/shell-completion/bash/meson.build
@@ -42,7 +42,7 @@ if bashcompletiondir != 'no'
                 ]
 
         foreach item : items
-                if item[1] == '' or conf.get(item[1], 0) == 1
+                if item[1] == '' or conf.get(item[1], false)
                         install_data(item[0],
                                      install_dir : bashcompletiondir)
                 endif
diff --git a/shell-completion/zsh/meson.build b/shell-completion/zsh/meson.build
index ed1513ed25..34408ce90d 100644
--- a/shell-completion/zsh/meson.build
+++ b/shell-completion/zsh/meson.build
@@ -39,7 +39,7 @@ if zshcompletiondir != 'no'
                 ]
 
         foreach item : items
-                if item[1] == '' or conf.get(item[1], 0) == 1
+                if item[1] == '' or conf.get(item[1], false)
                         install_data(item[0],
                                      install_dir : zshcompletiondir)
                 endif
diff --git a/src/boot/efi/meson.build b/src/boot/efi/meson.build
index 6241cb1c19..6d1b38a527 100644
--- a/src/boot/efi/meson.build
+++ b/src/boot/efi/meson.build
@@ -28,7 +28,7 @@ stub_sources = '''
         stub.c
 '''.split()
 
-if conf.get('ENABLE_EFI', 0) == 1 and get_option('gnu-efi') != 'false'
+if conf.get('ENABLE_EFI', false) and get_option('gnu-efi') != 'false'
         efi_cc = get_option('efi-cc')
         efi_ld = get_option('efi-ld')
 
diff --git a/src/coredump/meson.build b/src/coredump/meson.build
index ab3be6a7de..8f7d898b62 100644
--- a/src/coredump/meson.build
+++ b/src/coredump/meson.build
@@ -4,7 +4,7 @@ systemd_coredump_sources = files('''
         coredump-vacuum.h
 '''.split())
 
-if conf.get('HAVE_ELFUTILS', 0) == 1
+if conf.get('HAVE_ELFUTILS', false)
         systemd_coredump_sources += files(['stacktrace.c',
                                            'stacktrace.h'])
 endif
diff --git a/src/hostname/meson.build b/src/hostname/meson.build
index 7cb5fc135a..d58caa6787 100644
--- a/src/hostname/meson.build
+++ b/src/hostname/meson.build
@@ -1,4 +1,4 @@
-if conf.get('ENABLE_HOSTNAMED', 0) == 1
+if conf.get('ENABLE_HOSTNAMED', false)
         install_data('org.freedesktop.hostname1.conf',
                      install_dir : dbuspolicydir)
         install_data('org.freedesktop.hostname1.service',
diff --git a/src/import/meson.build b/src/import/meson.build
index f0ed92b4c2..3fd58cc2c8 100644
--- a/src/import/meson.build
+++ b/src/import/meson.build
@@ -48,7 +48,7 @@ systemd_export_sources = files('''
         import-compress.h
 '''.split())
 
-if conf.get('ENABLE_IMPORTD', 0) == 1
+if conf.get('ENABLE_IMPORTD', false)
         install_data('org.freedesktop.import1.conf',
                      install_dir : dbuspolicydir)
         install_data('org.freedesktop.import1.service',
diff --git a/src/journal-remote/meson.build b/src/journal-remote/meson.build
index 072fa14548..d266b34e65 100644
--- a/src/journal-remote/meson.build
+++ b/src/journal-remote/meson.build
@@ -21,7 +21,7 @@ systemd_journal_gatewayd_sources = files('''
         microhttpd-util.c
 '''.split())
 
-if conf.get('ENABLE_REMOTE', 0) == 1 and conf.get('HAVE_LIBCURL', 0) == 1
+if conf.get('ENABLE_REMOTE', false) and conf.get('HAVE_LIBCURL', false)
         journal_upload_conf = configure_file(
                 input : 'journal-upload.conf.in',
                 output : 'journal-upload.conf',
@@ -30,7 +30,7 @@ if conf.get('ENABLE_REMOTE', 0) == 1 and conf.get('HAVE_LIBCURL', 0) == 1
                      install_dir : pkgsysconfdir)
 endif
 
-if conf.get('ENABLE_REMOTE', 0) == 1 and conf.get('HAVE_MICROHTTPD', 0) == 1
+if conf.get('ENABLE_REMOTE', false) and conf.get('HAVE_MICROHTTPD', false)
         journal_remote_conf = configure_file(
                 input : 'journal-remote.conf.in',
                 output : 'journal-remote.conf',
diff --git a/src/journal/meson.build b/src/journal/meson.build
index 37ec559e41..582f83afb9 100644
--- a/src/journal/meson.build
+++ b/src/journal/meson.build
@@ -20,7 +20,7 @@ journal_internal_sources = files('''
         sd-journal.c
 '''.split())
 
-if conf.get('HAVE_GCRYPT', 0) == 1
+if conf.get('HAVE_GCRYPT', false)
         journal_internal_sources += files('''
                 journal-authenticate.c
                 journal-authenticate.h
@@ -36,7 +36,7 @@ endif
 audit_type_includes = [config_h,
                        missing_h,
                        'linux/audit.h']
-if conf.get('HAVE_AUDIT', 0) == 1
+if conf.get('HAVE_AUDIT', false)
         audit_type_includes += 'libaudit.h'
 endif
 
@@ -95,7 +95,7 @@ systemd_cat_sources = files('cat.c')
 
 journalctl_sources = files('journalctl.c')
 
-if conf.get('HAVE_QRENCODE', 0) == 1
+if conf.get('HAVE_QRENCODE', false)
         journalctl_sources += files('journal-qrcode.c',
                                     'journal-qrcode.h')
 endif
diff --git a/src/locale/meson.build b/src/locale/meson.build
index d03af4c0e2..d7dd113c8d 100644
--- a/src/locale/meson.build
+++ b/src/locale/meson.build
@@ -6,7 +6,7 @@ systemd_localed_sources = files('''
 
 localectl_sources = files('localectl.c')
 
-if conf.get('ENABLE_LOCALED', 0) == 1
+if conf.get('ENABLE_LOCALED', false)
         install_data('org.freedesktop.locale1.conf',
                      install_dir : dbuspolicydir)
         install_data('org.freedesktop.locale1.service',
@@ -27,7 +27,7 @@ endif
 kbd_model_map = join_paths(meson.current_source_dir(),  'kbd-model-map')
 language_fallback_map = join_paths(meson.current_source_dir(), 'language-fallback-map')
 
-if conf.get('ENABLE_LOCALED', 0) == 1
+if conf.get('ENABLE_LOCALED', false)
         install_data('kbd-model-map',
                      'language-fallback-map',
                      install_dir : pkgdatadir)
diff --git a/src/login/meson.build b/src/login/meson.build
index a518215be8..26bdbec424 100644
--- a/src/login/meson.build
+++ b/src/login/meson.build
@@ -39,7 +39,7 @@ liblogind_core_sources = files('''
 '''.split())
 
 logind_acl_c = files('logind-acl.c')
-if conf.get('HAVE_ACL', 0) == 1
+if conf.get('HAVE_ACL', false)
         liblogind_core_sources += logind_acl_c
 endif
 
@@ -55,7 +55,7 @@ loginctl_sources = files('''
         sysfs-show.c
 '''.split())
 
-if conf.get('ENABLE_LOGIND', 0) == 1
+if conf.get('ENABLE_LOGIND', false)
         logind_conf = configure_file(
                 input : 'logind.conf.in',
                 output : 'logind.conf',
diff --git a/src/machine/meson.build b/src/machine/meson.build
index 953774fdb6..1a0813323c 100644
--- a/src/machine/meson.build
+++ b/src/machine/meson.build
@@ -21,7 +21,7 @@ libmachine_core = static_library(
         include_directories : includes,
         dependencies : [threads])
 
-if conf.get('ENABLE_MACHINED', 0) == 1
+if conf.get('ENABLE_MACHINED', false)
         install_data('org.freedesktop.machine1.conf',
                      install_dir : dbuspolicydir)
         install_data('org.freedesktop.machine1.service',
diff --git a/src/network/meson.build b/src/network/meson.build
index 771aa68ec1..ebd4e62eb3 100644
--- a/src/network/meson.build
+++ b/src/network/meson.build
@@ -75,7 +75,7 @@ networkctl_sources = files('networkctl.c')
 
 network_include_dir = include_directories('.')
 
-if conf.get('ENABLE_NETWORKD', 0) == 1
+if conf.get('ENABLE_NETWORKD', false)
         networkd_gperf_c = custom_target(
                 'networkd-gperf.c',
                 input : 'networkd-gperf.gperf',
diff --git a/src/resolve/meson.build b/src/resolve/meson.build
index 347ffaaeca..f3c411ffee 100644
--- a/src/resolve/meson.build
+++ b/src/resolve/meson.build
@@ -123,7 +123,7 @@ systemd_resolve_sources = (basic_dns_sources +
                            systemd_resolve_only_sources +
                            dns_type_headers)
 
-if conf.get('ENABLE_RESOLVED', 0) == 1
+if conf.get('ENABLE_RESOLVED', false)
         install_data('org.freedesktop.resolve1.conf',
                      install_dir : dbuspolicydir)
         install_data('org.freedesktop.resolve1.service',
diff --git a/src/shared/meson.build b/src/shared/meson.build
index 0747f76649..49a7d9f30b 100644
--- a/src/shared/meson.build
+++ b/src/shared/meson.build
@@ -103,19 +103,19 @@ shared_sources = '''
 test_tables_h = files('test-tables.h')
 shared_sources += [test_tables_h]
 
-if conf.get('HAVE_ACL', 0) == 1
+if conf.get('HAVE_ACL', false)
         shared_sources += ['acl-util.c']
 endif
 
-if conf.get('HAVE_UTMP', 0) == 1
+if conf.get('HAVE_UTMP', false)
         shared_sources += ['utmp-wtmp.c']
 endif
 
-if conf.get('HAVE_SECCOMP', 0) == 1
+if conf.get('HAVE_SECCOMP', false)
         shared_sources += ['seccomp-util.c']
 endif
 
-if conf.get('HAVE_LIBIPTC', 0) == 1
+if conf.get('HAVE_LIBIPTC', false)
         shared_sources += ['firewall-util.c']
 endif
 
diff --git a/src/timedate/meson.build b/src/timedate/meson.build
index 2e74245f66..63124d665b 100644
--- a/src/timedate/meson.build
+++ b/src/timedate/meson.build
@@ -1,4 +1,4 @@
-if conf.get('ENABLE_TIMEDATED', 0) == 1
+if conf.get('ENABLE_TIMEDATED', false)
         install_data('org.freedesktop.timedate1.conf',
                      install_dir : dbuspolicydir)
         install_data('org.freedesktop.timedate1.service',
diff --git a/src/timesync/meson.build b/src/timesync/meson.build
index dece39ea10..ee54c3e449 100644
--- a/src/timesync/meson.build
+++ b/src/timesync/meson.build
@@ -16,7 +16,7 @@ timesyncd_gperf_c = custom_target(
 
 systemd_timesyncd_sources += [timesyncd_gperf_c]
 
-if conf.get('ENABLE_TIMESYNCD', 0) == 1
+if conf.get('ENABLE_TIMESYNCD', false)
         timesyncd_conf = configure_file(
                 input : 'timesyncd.conf.in',
                 output : 'timesyncd.conf',
diff --git a/src/udev/meson.build b/src/udev/meson.build
index 495e9d3c54..9692ddc1e9 100644
--- a/src/udev/meson.build
+++ b/src/udev/meson.build
@@ -36,15 +36,15 @@ libudev_core_sources = '''
         net/ethtool-util.h
 '''.split()
 
-if conf.get('HAVE_KMOD', 0) == 1
+if conf.get('HAVE_KMOD', false)
         libudev_core_sources += ['udev-builtin-kmod.c']
 endif
 
-if conf.get('HAVE_BLKID', 0) == 1
+if conf.get('HAVE_BLKID', false)
         libudev_core_sources += ['udev-builtin-blkid.c']
 endif
 
-if conf.get('HAVE_ACL', 0) == 1
+if conf.get('HAVE_ACL', false)
         libudev_core_sources += ['udev-builtin-uaccess.c',
 	                         logind_acl_c,
                                  sd_login_c]
diff --git a/src/vconsole/meson.build b/src/vconsole/meson.build
index ac382e3daa..1260b53537 100644
--- a/src/vconsole/meson.build
+++ b/src/vconsole/meson.build
@@ -1,4 +1,4 @@
-if conf.get('ENABLE_VCONSOLE', 0) == 1
+if conf.get('ENABLE_VCONSOLE', false)
         vconsole_rules = configure_file(
                 input : '90-vconsole.rules.in',
                 output : '90-vconsole.rules',
diff --git a/sysctl.d/meson.build b/sysctl.d/meson.build
index 1205c3a122..1b6707df77 100644
--- a/sysctl.d/meson.build
+++ b/sysctl.d/meson.build
@@ -4,7 +4,7 @@ install_data(
 
 in_files = []
 
-if conf.get('ENABLE_COREDUMP', 0) == 1
+if conf.get('ENABLE_COREDUMP', false)
         in_files += ['50-coredump.conf']
 endif
 
diff --git a/sysusers.d/meson.build b/sysusers.d/meson.build
index 8e126f289a..f4662c0a85 100644
--- a/sysusers.d/meson.build
+++ b/sysusers.d/meson.build
@@ -1,6 +1,6 @@
 in_files = ['basic.conf']
 
-enable_sysusers = conf.get('ENABLE_SYSUSERS', 0) == 1
+enable_sysusers = conf.get('ENABLE_SYSUSERS', false)
 
 foreach file : in_files
         gen = configure_file(
@@ -15,7 +15,7 @@ endforeach
 
 m4_files = ['systemd.conf']
 
-if conf.get('ENABLE_REMOTE', 0) == 1 and conf.get('HAVE_MICROHTTPD', 0) == 1
+if conf.get('ENABLE_REMOTE', false) and conf.get('HAVE_MICROHTTPD', false)
         m4_files += ['systemd-remote.conf']
 endif
 
diff --git a/test/meson.build b/test/meson.build
index 5823976d10..b7fb507c9c 100644
--- a/test/meson.build
+++ b/test/meson.build
@@ -137,7 +137,7 @@ test_data_files = '''
         journal-data/journal-2.txt
 '''.split()
 
-if conf.get('ENABLE_RESOLVED', 0) == 1
+if conf.get('ENABLE_RESOLVED', false)
         test_data_files += '''
                 test-resolve/_openpgpkey.fedoraproject.org.pkts
                 test-resolve/fedoraproject.org.pkts
diff --git a/tmpfiles.d/meson.build b/tmpfiles.d/meson.build
index dfbe04a976..d68d17e956 100644
--- a/tmpfiles.d/meson.build
+++ b/tmpfiles.d/meson.build
@@ -1,4 +1,4 @@
-enable_tmpfiles = conf.get('ENABLE_TMPFILES', 0) == 1
+enable_tmpfiles = conf.get('ENABLE_TMPFILES', false)
 
 tmpfiles = [['home.conf',            ''],
             ['journal-nocow.conf',   ''],
@@ -14,7 +14,7 @@ tmpfiles = [['home.conf',            ''],
 foreach pair : tmpfiles
         if not enable_tmpfiles
                 # do nothing
-        elif pair[1] == '' or conf.get(pair[1], 0) == 1
+        elif pair[1] == '' or conf.get(pair[1], false)
                 install_data(pair[0], install_dir : tmpfilesdir)
         else
                 message('Not installing tmpfiles.d/@0@ because @1@ is @2@'
diff --git a/units/meson.build b/units/meson.build
index 9411891c7f..6fb1fa29c9 100644
--- a/units/meson.build
+++ b/units/meson.build
@@ -240,8 +240,8 @@ foreach tuple : in_units
 
         # we do this here because install_data does not accept custom_target output
         conds = tuple[1].split(' ')
-        install = ((conds.get(0, '') == '' or conf.get(conds[0], 0) == 1) and
-                   (conds.get(1, '') == '' or conf.get(conds[1], 0) == 1))
+        install = ((conds.get(0, '') == '' or conf.get(conds[0], false)) and
+                   (conds.get(1, '') == '' or conf.get(conds[1], false)))
 
         gen1 = configure_file(
                 input : file + '.in',
@@ -269,8 +269,8 @@ foreach tuple : m4_units
 
         # we do this here because install_data does not accept custom_target output
         conds = tuple[1].split(' ')
-        install = ((conds.get(0, '') == '' or conf.get(conds[0], 0) == 1) and
-                   (conds.get(1, '') == '' or conf.get(conds[1], 0) == 1))
+        install = ((conds.get(0, '') == '' or conf.get(conds[0], false)) and
+                   (conds.get(1, '') == '' or conf.get(conds[1], false)))
 
         custom_target(
                 file,
@@ -293,8 +293,8 @@ foreach tuple : units
         input = tuple.get(3, file)
 
         conds = tuple[1].split(' ')
-        install = ((conds.get(0, '') == '' or conf.get(conds[0], 0) == 1) and
-                   (conds.get(1, '') == '' or conf.get(conds[1], 0) == 1))
+        install = ((conds.get(0, '') == '' or conf.get(conds[0], false)) and
+                   (conds.get(1, '') == '' or conf.get(conds[1], false)))
 
         if install
                 install_data(input,
@@ -317,7 +317,7 @@ meson.add_install_script(meson_make_symlink,
 meson.add_install_script(meson_make_symlink,
                          join_paths(dbussystemservicedir, 'org.freedesktop.systemd1.service'),
                          join_paths(dbussessionservicedir, 'org.freedesktop.systemd1.service'))
-if conf.get('HAVE_SYSV_COMPAT', 0) == 1
+if conf.get('HAVE_SYSV_COMPAT', false)
         foreach i : [1, 2, 3, 4, 5]
                 meson.add_install_script(
                         'sh', '-c',