Switch to upstream sleep(3) and usleep(3).
Also fix the signature of usleep, and the definition of useconds_t which
should be unsigned, as the 'u' in its name implies.
This patch also cleans up the existing FreeBSD hacks by moving the libm
stuff from <sys/cdefs.h> to a libm-private header, and adding comments
about the hacks we use to build FreeBSD source.
Change-Id: Ibe5067a380502df94a0a3a7901969b35411085b6
diff --git a/libm/freebsd-compat.h b/libm/freebsd-compat.h
new file mode 100644
index 0000000..ca5b42c
--- /dev/null
+++ b/libm/freebsd-compat.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _BIONIC_LIBM_FREEBSD_COMPAT_H_included
+#define _BIONIC_LIBM_FREEBSD_COMPAT_H_included
+
+#define __weak_reference(sym,alias) \
+ __asm__(".weak " #alias); \
+ __asm__(".equ " #alias ", " #sym)
+
+#define __strong_reference(sym,aliassym) \
+ extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)))
+
+#endif