fix builds on OpenSSL <= 1.0.x

I thought OpenSSL 1.0.x offered the new-style OpenSSL_version_num() API
to obtain version number, but they don't.

1 files changed, 8 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 0d55bece5..a4109effc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2601,7 +2601,11 @@ if test "x$openssl" = "xyes" ; then
                 fd = fopen(DATA,"w");
                 if(fd == NULL)
                         exit(1);
-
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+# define OpenSSL_version_num    SSLeay
+# define OpenSSL_version        SSLeay_version
+# define OPENSSL_VERSION        SSLEAY_VERSION
+#endif
                 if ((rc = fprintf(fd, "%08lx (%s)\n",
                     (unsigned long)OpenSSL_version_num(),
                     OpenSSL_version(OPENSSL_VERSION))) < 0)
@@ -2646,6 +2650,9 @@ if test "x$openssl" = "xyes" ; then
         #include <openssl/opensslv.h>
         #include <openssl/crypto.h>
                 ]], [[
+#if OPENSSL_VERSION_NUMBER < 0x10100000L
+# define OpenSSL_version_num SSLeay
+#endif
                 exit(OpenSSL_version_num() == OPENSSL_VERSION_NUMBER ? 0 : 1);
                 ]])],
                 [