Issue #27744: Add AF_ALG (Linux Kernel crypto) to socket module.
diff --git a/configure.ac b/configure.ac
index 56fd29c..088511f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3862,6 +3862,19 @@
AC_DEFINE(HAVE_SOCKADDR_STORAGE, 1, [struct sockaddr_storage (sys/socket.h)])
fi
+AC_MSG_CHECKING(for sockaddr_alg)
+AC_CACHE_VAL(ac_cv_struct_sockaddr_alg,
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+# include <sys/types.h>
+# include <sys/socket.h>
+# include <linux/if_alg.h>]], [[struct sockaddr_alg s]])],
+ [ac_cv_struct_sockaddr_alg=yes],
+ [ac_cv_struct_sockaddr_alg=no]))
+AC_MSG_RESULT($ac_cv_struct_sockaddr_alg)
+if test $ac_cv_struct_sockaddr_alg = yes; then
+ AC_DEFINE(HAVE_SOCKADDR_ALG, 1, [struct sockaddr_alg (linux/if_alg.h)])
+fi
+
# checks for compiler characteristics
AC_C_CHAR_UNSIGNED