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| author | Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com> | 2019-10-20 16:00:30 -0500 |
|---|---|---|
| committer | Gabriel F. T. Gomes <gabrielftg@linux.ibm.com> | 2019-12-27 15:02:10 -0300 |
| commit | 1ef9b6e0bf1268050e74087c4f6bd056263a28c7 (patch) | |
| tree | 3b3f7905c03c4890473ab9da3e7fdc5dbb42241e /include/stdlib.h | |
| parent | 863d775c481704baaa41855fc93e5a1ca2dc6bf6 (diff) | |
| download | glibc-1ef9b6e0bf1268050e74087c4f6bd056263a28c7.tar.gz | |
Do not redirect calls to __GI_* symbols, when redirecting to *ieee128
On platforms where long double has IEEE binary128 format as a third
option (initially, only powerpc64le), many exported functions are
redirected to their __*ieee128 equivalents. This redirection is
provided by installed headers such as stdio-ldbl.h, and is supposed to
work correctly with user code.
However, during the build of glibc, similar redirections are employed,
in internal headers, such as include/stdio.h, in order to avoid extra
PLT entries. These redirections conflict with the redirections to
__*ieee128, and must be avoided during the build. This patch protects
the second redirections with a test for __LONG_DOUBLE_USES_FLOAT128, a
new macro that is defined to 1 when functions that deal with long double
typed values reuses the _Float128 implementation (this is currently only
true for powerpc64le).
Tested for powerpc64le, x86_64, and with build-many-glibcs.py.
Co-authored-by: Gabriel F. T. Gomes <gabrielftg@linux.ibm.com>
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Diffstat (limited to 'include/stdlib.h')
| -rw-r--r-- | include/stdlib.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/stdlib.h b/include/stdlib.h index 114e12d255..1fab78aa16 100644 --- a/include/stdlib.h +++ b/include/stdlib.h @@ -202,9 +202,12 @@ libc_hidden_proto (____strtoll_l_internal) libc_hidden_proto (____strtoul_l_internal) libc_hidden_proto (____strtoull_l_internal) +#include <bits/floatn.h> libc_hidden_proto (strtof) libc_hidden_proto (strtod) +#if __LONG_DOUBLE_USES_FLOAT128 == 0 libc_hidden_proto (strtold) +#endif libc_hidden_proto (strtol) libc_hidden_proto (strtoll) libc_hidden_proto (strtoul) |