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-rw-r--r--configure.ac2
1 files changed, 2 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac
index 8e247db32..06e9e3b37 100644
--- a/configure.ac
+++ b/configure.ac
@@ -937,6 +937,8 @@ AC_CHECK_SIZEOF(pid_t)
AC_CHECK_TYPES([uint, u_char, ssize_t])
+AC_PC_FROM_UCONTEXT([/bin/true])
+
dnl used to include sockaddr_storage, but everybody has that.
AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
[#ifdef HAVE_SYS_TYPES_H