libc: indicate timespec is defined

In order to avoid multiple definition errors, indicate that struct
timespec is declared.

Signed-off-by: Chris Friedt <[email protected]>

Author: cfriedt

lib/libc/arcmwdt/include/sys/timespec.h

@@ -9,6 +9,8 @@
 
 #include <sys/_timespec.h>
 
+#define _TIMESPEC_DECLARED
+
 struct itimerspec {
 	struct timespec it_interval;  /* Timer interval */
 	struct timespec it_value;     /* Timer expiration */

lib/libc/armstdc/include/sys/_timespec.h

@@ -13,5 +13,6 @@ struct timespec {
 	time_t tv_sec;
 	long tv_nsec;
 };
+#define __timespec_defined
 
 #endif /* ZEPHYR_LIB_LIBC_ARMSTDC_INCLUDE_SYS__TIMESPEC_H_ */

lib/libc/minimal/include/sys/_timespec.h

@@ -19,9 +19,13 @@ typedef _TIME_T_ time_t;
 typedef _SUSECONDS_T_ suseconds_t;
 #endif
 
+#if !defined(_TIMESPEC_DECLARED) && !defined(__timespec_defined)
 struct timespec {
 	time_t tv_sec;
 	long tv_nsec;
 };
+#define __timespec_defined
+#define _TIMESPEC_DECLARED
+#endif
 
 #endif /* ZEPHYR_LIB_LIBC_MINIMAL_INCLUDE_SYS__TIMESPEC_H_ */

lib/libc/newlib/include/sys/_timespec.h

@@ -0,0 +1,14 @@
+/*
+ * Copyright The Zephyr Project Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_LIB_LIBC_NEWLIB_INCLUDE_SYS__TIMESPEC_H_
+#define ZEPHYR_LIB_LIBC_NEWLIB_INCLUDE_SYS__TIMESPEC_H_
+
+#include_next <sys/_timespec.h>
+
+#define _TIMESPEC_DECLARED
+
+#endif /* ZEPHYR_LIB_LIBC_NEWLIB_INCLUDE_SYS__TIMESPEC_H_ */

lib/libc/picolibc/include/sys/_timespec.h

@@ -0,0 +1,14 @@
+/*
+ * Copyright The Zephyr Project Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_LIB_LIBC_PICOLIBC_INCLUDE_SYS__TIMESPEC_H_
+#define ZEPHYR_LIB_LIBC_PICOLIBC_INCLUDE_SYS__TIMESPEC_H_
+
+#include_next <sys/_timespec.h>
+
+#define _TIMESPEC_DECLARED
+
+#endif /* ZEPHYR_LIB_LIBC_PICOLIBC_INCLUDE_SYS__TIMESPEC_H_ */