Add patch from Joel Sherrill for i386 and x86_64 fenv support

1 files changed, 23 insertions, 0 deletions

diff --git a/newlib/libm/fenv/fenv_stub.c b/newlib/libm/fenv/fenv_stub.c
new file mode 100644
index 000000000..a4eb652f3
--- /dev/null
+++ b/newlib/libm/fenv/fenv_stub.c
@@ -0,0 +1,23 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ * 
+ * (c) Copyright 2019 Joel Sherrill <joel@rtems.org
+ */
+
+/*
+ * This file is intentionally empty. 
+ *
+ * Newlib's build infrastructure needs a machine specific fiel to override
+ * the generic implementation in the library.  When a target
+ * implementation of the fenv.h methods puts all methods in a single file
+ * (e.g. fenv.c) or some as inline methods in its <sys/fenv.h>, it will need
+ * to override the default implementation found in a file in this directory.
+ *
+ * For each file that the target's machine directory needs to override,
+ * this file should be symbolically linked to that specific file name
+ * in the target directory. For example, the target may use fe_dfl_env.c
+ * from the default implementation but need to override all others.
+ */
+
+/* deliberately empty */
+