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, 1 insertions, 1 deletions

diff --git a/src/resolve/test-dnssec-complex.c b/src/resolve/test-dnssec-complex.c
index 090b2fac23..25ec6f4352 100644
--- a/src/resolve/test-dnssec-complex.c
+++ b/src/resolve/test-dnssec-complex.c
@@ -218,7 +218,7 @@ int main(int argc, char* argv[]) {
         test_hostname_lookup(bus, "poettering.de", AF_INET, NULL);
         test_hostname_lookup(bus, "poettering.de", AF_INET6, NULL);
 
-#if defined(HAVE_LIBIDN2) || defined(HAVE_LIBIDN)
+#if HAVE_LIBIDN2 || HAVE_LIBIDN
         /* Unsigned A with IDNA conversion necessary */
         test_hostname_lookup(bus, "pöttering.de", AF_UNSPEC, NULL);
         test_hostname_lookup(bus, "pöttering.de", AF_INET, NULL);