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/test/test-dns-domain.c b/src/test/test-dns-domain.c
index 93b758ec7a..75bc5e4a73 100644
--- a/src/test/test-dns-domain.c
+++ b/src/test/test-dns-domain.c
@@ -624,7 +624,7 @@ static void test_dns_name_apply_idna_one(const char *s, int expected, const char
 }
 
 static void test_dns_name_apply_idna(void) {
-#if defined HAVE_LIBIDN2 || defined HAVE_LIBIDN
+#if HAVE_LIBIDN2 || HAVE_LIBIDN
         const int ret = 1;
 #else
         const int ret = 0;
@@ -638,7 +638,7 @@ static void test_dns_name_apply_idna(void) {
          * labels. If registrars follow IDNA2008 we'll just be performing a
          * useless lookup.
          */
-#if defined HAVE_LIBIDN
+#if HAVE_LIBIDN
         const int ret2 = 1;
 #else
         const int ret2 = 0;