build-sys: use #if Y instead of #ifdef Y everywhere

The advantage is that is the name is mispellt, cpp will warn us.

$ git grep -Ee "conf.set\('(HAVE|ENABLE)_" -l|xargs sed -r -i "s/conf.set\('(HAVE|ENABLE)_/conf.set10('\1_/"
$ git grep -Ee '#ifn?def (HAVE|ENABLE)' -l|xargs sed -r -i 's/#ifdef (HAVE|ENABLE)/#if \1/; s/#ifndef (HAVE|ENABLE)/#if ! \1/;'
$ git grep -Ee 'if.*defined\(HAVE' -l|xargs sed -i -r 's/defined\((HAVE_[A-Z0-9_]*)\)/\1/g'
$ git grep -Ee 'if.*defined\(ENABLE' -l|xargs sed -i -r 's/defined\((ENABLE_[A-Z0-9_]*)\)/\1/g'
+ manual changes to meson.build

squash! build-sys: use #if Y instead of #ifdef Y everywhere

v2:
- fix incorrect setting of HAVE_LIBIDN2

1 files changed, 2 insertions, 2 deletions

diff --git a/src/login/meson.build b/src/login/meson.build
index 26bdbec424..d0723f134f 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', false)
+if conf.get('HAVE_ACL') == 1
         liblogind_core_sources += logind_acl_c
 endif
 
@@ -55,7 +55,7 @@ loginctl_sources = files('''
         sysfs-show.c
 '''.split())
 
-if conf.get('ENABLE_LOGIND', false)
+if conf.get('ENABLE_LOGIND') == 1
         logind_conf = configure_file(
                 input : 'logind.conf.in',
                 output : 'logind.conf',