https://github.com/kyz/libmspack/commit/c19e707936947b45cf05bc9aaee68517c6c2aca6

---
 configure.ac  | 1 +
 1 files changed, 1 insertions(+)

diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -30,6 +30,7 @@ AC_CHECK_HEADERS([inttypes.h])
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 AC_C_INLINE
+AC_C_BIGENDIAN
 AC_TYPE_MODE_T
 AC_TYPE_OFF_T
 AC_TYPE_SIZE_T