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Use __attribute((weak)) for _write() and other stubs called by newlib, so that sketch and library code can provide non-stub implementations (#1777)

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rlcamp 2023-10-20 12:58:51 -07:00 committed by GitHub
parent 2e93f1c9c8
commit 44abc19d46
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1 changed files with 39 additions and 13 deletions
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52
cores/rp2040/posix.cpp
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@ -33,7 +33,9 @@
extern "C" int errno; extern "C" int errno;
extern "C" ssize_t _write(int fd, const void *buf, size_t count) { extern "C"
__attribute((weak))
ssize_t _write(int fd, const void *buf, size_t count) {
#if defined DEBUG_RP2040_PORT #if defined DEBUG_RP2040_PORT
(void) fd; (void) fd;
return DEBUG_RP2040_PORT.write((const char *)buf, count); return DEBUG_RP2040_PORT.write((const char *)buf, count);
@ -45,7 +47,9 @@ extern "C" ssize_t _write(int fd, const void *buf, size_t count) {
#endif #endif
} }
extern "C" int _chown(const char *path, uid_t owner, gid_t group) { extern "C"
__attribute((weak))
int _chown(const char *path, uid_t owner, gid_t group) {
(void) path; (void) path;
(void) owner; (void) owner;
(void) group; (void) group;
@ -53,7 +57,9 @@ extern "C" int _chown(const char *path, uid_t owner, gid_t group) {
return -1; return -1;
} }
extern "C" int _close(int fd) { extern "C"
__attribute((weak))
int _close(int fd) {
(void) fd; (void) fd;
errno = ENOSYS; errno = ENOSYS;
return -1; return -1;
@ -72,7 +78,9 @@ extern "C" int _fork(void) {
return -1; return -1;
} }
extern "C" int _fstat(int fd, struct stat *st) { extern "C"
__attribute((weak))
int _fstat(int fd, struct stat *st) {
(void) fd; (void) fd;
(void) st; (void) st;
errno = ENOSYS; errno = ENOSYS;
@ -115,7 +123,9 @@ extern "C" void __setSystemTime(unsigned long long sec, unsigned long usec) {
__timedelta_us = newnow_us - now_us; __timedelta_us = newnow_us - now_us;
} }
extern "C" int _isatty(int file) { extern "C"
__attribute((weak))
int _isatty(int file) {
(void) file; (void) file;
errno = ENOSYS; errno = ENOSYS;
return 0; return 0;
@ -128,14 +138,18 @@ extern "C" int _kill(int pid, int sig) {
return -1; return -1;
} }
extern "C" int _link(char *existing, char *newlink) { extern "C"
__attribute((weak))
int _link(char *existing, char *newlink) {
(void) existing; (void) existing;
(void) newlink; (void) newlink;
errno = ENOSYS; errno = ENOSYS;
return -1; return -1;
} }
extern "C" int _lseek(int file, int ptr, int dir) { extern "C"
__attribute((weak))
int _lseek(int file, int ptr, int dir) {
(void) file; (void) file;
(void) ptr; (void) ptr;
(void) dir; (void) dir;
@ -143,7 +157,9 @@ extern "C" int _lseek(int file, int ptr, int dir) {
return -1; return -1;
} }
extern "C" int _open(char *file, int flags, int mode) { extern "C"
__attribute((weak))
int _open(char *file, int flags, int mode) {
(void) file; (void) file;
(void) flags; (void) flags;
(void) mode; (void) mode;
@ -151,7 +167,9 @@ extern "C" int _open(char *file, int flags, int mode) {
return -1; return -1;
} }
extern "C" int _read(int file, char *ptr, int len) { extern "C"
__attribute((weak))
int _read(int file, char *ptr, int len) {
(void) file; (void) file;
(void) ptr; (void) ptr;
(void) len; (void) len;
@ -159,7 +177,9 @@ extern "C" int _read(int file, char *ptr, int len) {
return -1; return -1;
} }
extern "C" int _readlink(const char *path, char *buf, size_t bufsize) { extern "C"
__attribute((weak))
int _readlink(const char *path, char *buf, size_t bufsize) {
(void) path; (void) path;
(void) buf; (void) buf;
(void) bufsize; (void) bufsize;
@ -167,14 +187,18 @@ extern "C" int _readlink(const char *path, char *buf, size_t bufsize) {
return -1; return -1;
} }
extern "C" int _stat(const char *file, struct stat *st) { extern "C"
__attribute((weak))
int _stat(const char *file, struct stat *st) {
(void) file; (void) file;
(void) st; (void) st;
errno = ENOSYS; errno = ENOSYS;
return -1; return -1;
} }
extern "C" int _symlink(const char *path1, const char *path2) { extern "C"
__attribute((weak))
int _symlink(const char *path1, const char *path2) {
(void) path1; (void) path1;
(void) path2; (void) path2;
errno = ENOSYS; errno = ENOSYS;
@ -187,7 +211,9 @@ extern "C" clock_t _times(struct tms *buf) {
return -1; return -1;
} }
extern "C" int _unlink(char *name) { extern "C"
__attribute((weak))
int _unlink(char *name) {
(void) name; (void) name;
errno = ENOSYS; errno = ENOSYS;
return -1; return -1;