diff options
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/bionic/__set_errno.cpp | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/libc/bionic/__set_errno.cpp b/libc/bionic/__set_errno.cpp index af6a68eb1..236aeacee 100644 --- a/libc/bionic/__set_errno.cpp +++ b/libc/bionic/__set_errno.cpp @@ -31,8 +31,19 @@ // This function is called from our assembler syscall stubs. // C/C++ code should just assign 'errno' instead. -// TODO: this should be __LIBC_HIDDEN__ but was exposed in <errno.h> in the NDK. -extern "C" int __set_errno(int n) { +// The return type is 'long' because we use the same routine in calls +// that return an int as in ones that return a ssize_t. On a 32-bit +// system these are the same size, but on a 64-bit system they're not. +// 'long' gives us 32-bit on 32-bit systems, 64-bit on 64-bit systems. + +#if __LP64__ +extern "C" __LIBC_HIDDEN__ long __set_errno(int); +#else +// __set_errno was mistakenly exposed in <errno.h> in the 32-bit NDK. +extern "C" long __set_errno(int); +#endif + +long __set_errno(int n) { errno = n; return -1; } |