When libgpiod is cross-compiled it will use rpl_malloc instead malloc which then
causes linking failure at later stage.
This happens because AC_FUNC_MALLOC wants to execute malloc() in a live system
and thus cannot be run at cross-compilation time. libgpiod should just do
AC_CHECK_FUNC instead.
diff --git a/configure.ac b/configure.ac
index ddb9dc2..5f41c4a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -82,7 +82,7 @@ AC_DEFUN([HEADER_NOT_FOUND_CXX],
# This is always checked (library needs this)
AC_HEADER_STDC
-AC_FUNC_MALLOC
+AC_CHECK_FUNC([malloc], [], [FUNC_NOT_FOUND_LIB([malloc])])
AC_CHECK_FUNC([ioctl], [], [FUNC_NOT_FOUND_LIB([ioctl])])
AC_CHECK_FUNC([asprintf], [], [FUNC_NOT_FOUND_LIB([asprintf])])
AC_CHECK_FUNC([scandir], [], [FUNC_NOT_FOUND_LIB([scandir])])
