From 572d89dc95418fc4349641e3b3bb41b456409a87 Mon Sep 17 00:00:00 2001
From: Cameron Katri <me@cameronkatri.com>
Date: Mon, 11 Oct 2021 13:45:40 -0400
Subject: Fix < OpenSSL 3.0.0 build

---
 ldid.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/ldid.cpp b/ldid.cpp
index f8360d3..08dcf55 100644
--- a/ldid.cpp
+++ b/ldid.cpp
@@ -43,7 +43,10 @@
 #include <sys/types.h>
 
 #ifndef LDID_NOSMIME
+#include <openssl/opensslv.h>
+# if OPENSSL_VERSION_NUM >= 0x30000000
 #include <openssl/provider.h>
+# endif
 #include <openssl/err.h>
 #include <openssl/pem.h>
 #include <openssl/pkcs7.h>
@@ -3121,8 +3124,10 @@ static void usage(const char *argv0) {
 int main(int argc, char *argv[]) {
 #ifndef LDID_NOSMIME
     OpenSSL_add_all_algorithms();
+# if OPENSSL_VERSION_NUM >= 0x30000000
     OSSL_PROVIDER *legacy = OSSL_PROVIDER_load(NULL, "legacy");
     OSSL_PROVIDER *deflt = OSSL_PROVIDER_load(NULL, "default");
+# endif
 #endif
 
     union {
@@ -3602,8 +3607,10 @@ int main(int argc, char *argv[]) {
     }
 
 #ifndef LDID_NOSMINE
+# if OPENSSL_VERSION_NUM >= 0x30000000
     OSSL_PROVIDER_unload(legacy);
     OSSL_PROVIDER_unload(deflt);
+# endif
 #endif
 
     return filee;
-- 
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