meson: add config setting to select between openssl and gcrypt

This is not pretty, but it is supposed to be only a temporary measure.

1 files changed, 20 insertions, 0 deletions

diff --git a/meson.build b/meson.build
index b0054b6667..dee05b6017 100644
--- a/meson.build
+++ b/meson.build
@@ -1523,6 +1523,18 @@ else
 endif
 conf.set10('ENABLE_REPART', have)
 
+# We support one or the other. If gcrypt is available, we assume it's there to
+# be used, and use it in preference.
+opt = get_option('cryptolib')
+if opt == 'openssl' and conf.get('HAVE_OPENSSL') == 0
+        error('openssl requested as the default cryptolib, but not available')
+endif
+conf.set10('PREFER_OPENSSL',
+           opt == 'openssl' or (opt == 'auto' and conf.get('HAVE_OPENSSL') == 1 and conf.get('HAVE_GCRYPT') == 0))
+conf.set10('HAVE_OPENSSL_OR_GCRYPT',
+           conf.get('HAVE_OPENSSL') == 1 or conf.get('HAVE_GCRYPT') == 1)
+lib_openssl_or_gcrypt = conf.get('PREFER_OPENSSL') == 1 ? libopenssl : libgcrypt
+
 want_importd = get_option('importd')
 if want_importd != 'false'
         have = (conf.get('HAVE_LIBCURL') == 1 and
@@ -4023,6 +4035,14 @@ else
         found += 'static-libudev(@0@)'.format(static_libudev)
 endif
 
+if conf.get('HAVE_OPENSSL_OR_GCRYPT') == 1 and conf.get('PREFER_OPENSSL') == 1
+        found += 'cryptolib(openssl)'
+elif conf.get('HAVE_OPENSSL_OR_GCRYPT') == 1
+        found += 'cryptolib(gcrypt)'
+else
+        missing += 'cryptolib'
+endif
+
 if conf.get('DNS_OVER_TLS_USE_GNUTLS') == 1
         found += 'DNS-over-TLS(gnutls)'
 elif conf.get('DNS_OVER_TLS_USE_OPENSSL') == 1