diff options
| -rw-r--r-- | extra/Configs/Config.in | 17 | ||||
| -rw-r--r-- | include/unistd.h | 2 | ||||
| -rw-r--r-- | libc/sysdeps/linux/common/fork.c | 14 |
3 files changed, 32 insertions, 1 deletions
diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in index 884a59e8b..1759586db 100644 --- a/extra/Configs/Config.in +++ b/extra/Configs/Config.in @@ -515,6 +515,23 @@ config UCLIBC_SUSV3_LEGACY_MACROS Currently applies to bcopy/bzero/bcmp/index/rindex et al. WARNING! ABI incompatibility. +config UCLIBC_HAS_STUBS + bool "Provide stubs for unavailable functionality" + default n + help + With this option uClibc provides non-functional stubs for + functions which are impossible to implement on the target + architecture. Otherwise, such functions are simply omitted. + + As of 2008-07, this option makes uClibc provide fork() stub + on NOMMU targets. It always sets errno to ENOSYS and returns -1. + + This may be useful if you port a lot of software and cannot + audit all of it and replace or disable fork() usage. + With this option, a program which uses fork() will build + successfully. Of course, it may be useless if fork() + is essential for its operation. + config UCLIBC_HAS_SHADOW bool "Shadow Password Support" default y diff --git a/include/unistd.h b/include/unistd.h index 58021a5e2..164f28909 100644 --- a/include/unistd.h +++ b/include/unistd.h @@ -717,7 +717,7 @@ extern int setresgid (__gid_t __rgid, __gid_t __egid, __gid_t __sgid) #endif -#ifdef __ARCH_USE_MMU__ +#if defined __UCLIBC_HAS_STUBS__ || defined __ARCH_USE_MMU__ /* Clone the calling process, creating an exact copy. Return -1 for errors, 0 to the new process, and the process ID of the new process to the old process. */ diff --git a/libc/sysdeps/linux/common/fork.c b/libc/sysdeps/linux/common/fork.c index b67cba05a..b4fa3686d 100644 --- a/libc/sysdeps/linux/common/fork.c +++ b/libc/sysdeps/linux/common/fork.c @@ -11,6 +11,7 @@ #include <unistd.h> #ifdef __ARCH_USE_MMU__ + #ifdef __NR_fork extern __typeof(fork) __libc_fork; #define __NR___libc_fork __NR_fork @@ -19,4 +20,17 @@ libc_hidden_proto(fork) weak_alias(__libc_fork,fork) libc_hidden_weak(fork) #endif + +#elif defined __UCLIBC_HAS_STUBS__ + +pid_t __libc_fork(void) +{ + __set_errno(ENOSYS); + return -1; +} +libc_hidden_proto(fork) +weak_alias(__libc_fork,fork) +libc_hidden_weak(fork) +link_warning(fork, "fork: this function is not implemented on no-mmu systems") + #endif |