Adding options to disable some other newlib support

- Option to disable pipe support
- Option to disable socker support
- Option to disable timezone support
- Option to disable cwd support

src/libcglue/cwd.c

@@ -178,6 +178,7 @@ int __path_absolute(const char *in, char *out, int len)
 
 #ifdef F___init_cwd
 /* Set the current working directory (CWD) to the path where the module was launched. */
+__attribute__((weak))
 void __init_cwd(char *argv_0)
 {
 	if (argv_0 != NULL) {

src/libcglue/pipe.c

@@ -92,6 +92,7 @@ int pipe(int fildes[2])
 #endif
 
 #ifdef F___pipe_close
+__attribute__((weak))
 int __pipe_close(int fd)
 {
 	int ret = 0;
@@ -124,6 +125,7 @@ int __pipe_close(int fd)
 #endif
 
 #ifdef F___pipe_nonblocking_read
+__attribute__((weak))
 int __pipe_nonblocking_read(int fd, void *buf, size_t len)
 {
 	int ret;
@@ -180,6 +182,7 @@ int __pipe_nonblocking_read(int fd, void *buf, size_t len)
 #endif
 
 #ifdef F___pipe_read
+__attribute__((weak))
 int __pipe_read(int fd, void *buf, size_t len)
 {
 	int ret;
@@ -241,6 +244,7 @@ int __pipe_read(int fd, void *buf, size_t len)
 #endif
 
 #ifdef F___pipe_write
+__attribute__((weak))
 int __pipe_write(int fd, const void *buf, size_t len)
 {
 	int ret;
@@ -286,6 +290,7 @@ int __pipe_write(int fd, const void *buf, size_t len)
 #endif
 
 #ifdef F___pipe_nonblocking_write
+__attribute__((weak))
 int __pipe_nonblocking_write(int fd, const void *buf, size_t len)
 {
 	int ret;

src/libcglue/socket.c

@@ -53,6 +53,7 @@ int	socket(int domain, int type, int protocol)
    them in and have expanded socket capability. */
 
 #ifdef F___socket_close
+__attribute__((weak))
 int __socket_close(int sock)
 {
 	int ret = 0;
@@ -170,6 +171,7 @@ int	listen(int s, int backlog)
 #endif
 
 #ifdef F_recv
+__attribute__((weak))
 ssize_t	recv(int s, void *buf, size_t len, int flags)
 {
 	int ret;
@@ -212,6 +214,7 @@ ssize_t	recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr *from,
 #endif
 
 #ifdef F_send
+__attribute__((weak))
 ssize_t	send(int s, const void *buf, size_t len, int flags)
 {
 	int ret;
@@ -275,6 +278,7 @@ int	getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen)
 #endif
 
 #ifdef F_setsockopt
+__attribute__((weak))
 int	setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen)
 {
 	int ret;

src/user/pspmoduleinfo.h

@@ -107,6 +107,37 @@ enum PspModuleInfoAttr
 	void __libcglue_init(int argc, char *argv[]) {} \
 	void __libcglue_deinit() {}
 
+/* Disable using pipe suuport from POSIX functions. */
+#define PSP_DISABLE_NEWLIB_PIPE_SUPPORT() \
+	static int __pipe_not_supported() { \
+		errno = ENOSYS; \
+		return -1; \
+	} \
+	int __pipe_close(int fd) { return __pipe_not_supported(); } \
+	int __pipe_nonblocking_read(int fd, void *buf, size_t len) { return __pipe_not_supported(); } \
+	int __pipe_read(int fd, void *buf, size_t len) { return __pipe_not_supported(); } \
+	int __pipe_write(int fd, const void *buf, size_t len) { return __pipe_not_supported(); } \
+	int __pipe_nonblocking_write(int fd, const void *buf, size_t len) { return __pipe_not_supported(); }
+
+/* Disable using socket suuport from POSIX functions. */
+#define PSP_DISABLE_NEWLIB_SOCKET_SUPPORT() \
+	static int __socket_not_supported() { \
+		errno = ENOSYS; \
+		return -1; \
+	} \
+	int __socket_close(int sock) { return __socket_not_supported(); } \
+	ssize_t	recv(int s, void *buf, size_t len, int flags) { return __socket_not_supported(); } \
+	ssize_t	send(int s, const void *buf, size_t len, int flags) { return __socket_not_supported(); } \
+	int	setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen) { return __socket_not_supported(); } 
+
+/* Disable the timezone support from newlib. */
+#define PSP_DISABLE_NEWLIB_TIMEZONE_SUPPORT() \
+	void __timezone_update() { }
+
+/* Disable the CWD support from newlib. */
+#define PSP_DISABLE_NEWLIB_CWD_SUPPORT() \
+	void __init_cwd(char *argv_0) {}
+
 /* Disable the auto start of pthread on init for reducing binary size if not used. */
 #define PSP_DISABLE_AUTOSTART_PTHREAD() \
 	void __libpthreadglue_init() {}