lib: libc: arcmwdt: update headers for posix compatibility

Additional workarounds for POSIX compatibility with the arcmwdt
toolchain.

This commit addresses issues described in the comment linked below.

https://github.com/zephyrproject-rtos/zephyr/pull/97152#\
issuecomment-3409956230

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

Author: cfriedt

lib/libc/arcmwdt/include/aio.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright The Zephyr Project Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_AIO_H_
+#define ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_AIO_H_
+
+#include <zephyr/posix/aio.h>
+
+#endif /* ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_AIO_H_ */

lib/libc/arcmwdt/include/arpa/inet.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright The Zephyr Project Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_ARPA_INET_H_
+#define ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_ARPA_INET_H_
+
+#include <zephyr/posix/arpa/inet.h>
+
+#endif /* ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_ARPA_INET_H_ */

lib/libc/arcmwdt/include/net/if.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright The Zephyr Project Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_NET_IF_H_
+#define ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_NET_IF_H_
+
+#include <zephyr/posix/net/if.h>
+
+#endif /* ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_NET_IF_H_ */

lib/libc/arcmwdt/include/net/if_arp.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright The Zephyr Project Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_IF_ARP_H_
+#define ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_IF_ARP_H_
+
+#include <zephyr/posix/net/if_arp.h>
+
+#endif /* ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_IF_ARP_H_ */

lib/libc/arcmwdt/include/netinet/in.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright The Zephyr Project Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_NETINET_IN_H_
+#define ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_NETINET_IN_H_
+
+#include <zephyr/posix/netinet/in.h>
+
+#endif /* ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_NETINET_IN_H_ */

lib/libc/arcmwdt/include/netinet/tcp.h

@@ -0,0 +1,12 @@
+/*
+ * Copyright The Zephyr Project Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_NETINET_TCP_H_
+#define ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_NETINET_TCP_H_
+
+#include <zephyr/posix/netinet/tcp.h>
+
+#endif /* ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_NETINET_TCP_H_ */

lib/libc/arcmwdt/include/pthread.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright The Zephyr Project Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_PTHREAD_H_
+#define ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_PTHREAD_H_
+
+#if defined(_POSIX_THREADS)
+#undef __dead2
+#define __dead2
+
+#include_next <pthread.h>
+
+#define _PTHREAD_ATTR_T_DECLARED
+
+#undef PTHREAD_ONCE_INIT
+#define PTHREAD_ONCE_INIT                                                                          \
+	{                                                                                          \
+		0                                                                                  \
+	}
+
+/* The minimum allowable stack size */
+#define PTHREAD_STACK_MIN K_KERNEL_STACK_LEN(0)
+
+void __z_pthread_cleanup_push(void *cleanup[3], void (*routine)(void *arg), void *arg);
+void __z_pthread_cleanup_pop(int execute);
+
+#undef pthread_cleanup_push
+#define pthread_cleanup_push(_rtn, _arg)                                                           \
+	do /* enforce '{'-like behaviour */ {                                                      \
+		void *_z_pthread_cleanup[3];                                                       \
+	__z_pthread_cleanup_push(_z_pthread_cleanup, _rtn, _arg)
+
+#undef pthread_cleanup_pop
+#define pthread_cleanup_pop(_ex)                                                                   \
+	__z_pthread_cleanup_pop(_ex);                                                              \
+	} /* enforce '}'-like behaviour */                                                         \
+	while (0)
+
+#endif
+
+#endif /* ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_PTHREAD_H_ */

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

@@ -17,6 +17,7 @@
 #define _NLINK_T_DECLARED
 #define _UID_T_DECLARED
 #define _GID_T_DECLARED
+#define _PID_T_DECLARED
 
 #ifndef _SSIZE_T_DEFINED
 #define _SSIZE_T_DEFINED

lib/libc/arcmwdt/include/time.h

@@ -9,6 +9,24 @@
 
 #include_next <time.h>
 
+#if defined(_POSIX_C_SOURCE)
+/*
+ * POSIX requires time.h to define pid_t and clockid_t
+ * https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/time.h.html
+ */
+#if !defined(_PID_T_DECLARED)
+typedef long pid_t;
+#define _PID_T_DECLARED
+#endif
+
+#if !defined(_CLOCKID_T_DECLARED)
+typedef int clockid_t;
+#define _CLOCKID_T_DECLARED
+#endif
+#endif
+
+#define _TIMESPEC_DECLARED
+
 #include <zephyr/posix/posix_time.h>
 
 #ifdef __cplusplus

lib/libc/arcmwdt/include/unistd.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright The Zephyr Project Contributors
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_UNISTD_H_
+#define ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_UNISTD_H_
+
+#include_next <unistd.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int getentropy(void *buffer, size_t length);
+
+#if _POSIX_C_SOURCE >= 2
+#include <zephyr/posix/sys/confstr.h>
+#endif
+
+/* Note: usleep() was declared obsolescent as of POSIX.1-2001 and removed from POSIX.1-2008 */
+int usleep(__useconds_t __useconds);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ZEPHYR_LIB_LIBC_ARCMWDT_INCLUDE_UNISTD_H_ */