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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 488b2ae..5382f6f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -66,6 +66,8 @@ AC_C_BIGENDIAN
AC_HEADER_STDBOOL
+AC_CHECK_SIZEOF([unsigned long])
+
if test "$os_unix" = "yes"; then
AC_CHECK_FUNC([pthread_create], , [
AC_CHECK_LIB(pthread, pthread_create, , [