diff options
Diffstat (limited to 'newlib/libc/reent/impure.c')
| -rw-r--r-- | newlib/libc/reent/impure.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/newlib/libc/reent/impure.c b/newlib/libc/reent/impure.c index 12ee7177b..f5918c88f 100644 --- a/newlib/libc/reent/impure.c +++ b/newlib/libc/reent/impure.c @@ -9,6 +9,17 @@ #define __ATTRIBUTE_IMPURE_DATA__ #endif +/* Redeclare these symbols locally as weak so that the file containing + their definitions (along with a lot of other stuff) isn't sucked in + unless they are actually used by other compilation units. This is + important to reduce image size for targets with very small amounts + of memory. */ +#ifdef _REENT_SMALL +extern const struct __sFILE_fake __sf_fake_stdin _ATTRIBUTE ((weak)); +extern const struct __sFILE_fake __sf_fake_stdout _ATTRIBUTE ((weak)); +extern const struct __sFILE_fake __sf_fake_stderr _ATTRIBUTE ((weak)); +#endif + static struct _reent __ATTRIBUTE_IMPURE_DATA__ impure_data = _REENT_INIT (impure_data); #ifdef __CYGWIN__ extern struct _reent reent_data __attribute__ ((alias("impure_data"))); |