[PATCH kmod v5 1/5] configure: Detect openssl sm3 support

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Older openssl versions do not support sm3. The code has an option to
disable the sm3 hash but the lack of openssl support is not detected
automatically.

Signed-off-by: Michal Suchanek <msuchanek@xxxxxxx>
---
 configure.ac | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/configure.ac b/configure.ac
index 6064dee77ae6..331cc8a1ffd5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -123,6 +123,13 @@ AC_ARG_WITH([openssl],
 AS_IF([test "x$with_openssl" != "xno"], [
 	PKG_CHECK_MODULES([libcrypto], [libcrypto >= 1.1.0], [LIBS="$LIBS $libcrypto_LIBS"])
 	AC_DEFINE([ENABLE_OPENSSL], [1], [Enable openssl for modinfo.])
+	AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <openssl/ssl.h>
+		int nid = NID_sm3;]])], [
+		AC_MSG_NOTICE([openssl supports sm3])
+	], [
+		AC_MSG_NOTICE([openssl sm3 support not detected])
+		CPPFLAGS="$CPPFLAGS -DOPENSSL_NO_SM3"
+	])
 ], [
 	AC_MSG_NOTICE([openssl support not requested])
 ])
-- 
2.41.0




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