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| author | Chris Metcalf <cmetcalf@ezchip.com> | 2015-12-01 14:59:38 -0500 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@ezchip.com> | 2015-12-03 13:00:46 -0500 |
| commit | e59c94fa0e2871bdfcc363899e3be376c0def770 (patch) | |
| tree | 4073066d0031614fe8947c997354d0d3758f6602 /sysdeps/ieee754/dbl-64/s_isnan.c | |
| parent | b3f6040781f78af648fc90f67cec3e49a338b3e9 (diff) | |
| download | glibc-e59c94fa0e2871bdfcc363899e3be376c0def770.tar glibc-e59c94fa0e2871bdfcc363899e3be376c0def770.tar.gz glibc-e59c94fa0e2871bdfcc363899e3be376c0def770.tar.bz2 glibc-e59c94fa0e2871bdfcc363899e3be376c0def770.zip | |
math: add LDBL_CLASSIFY_COMPAT support
If a platform does not define "long-double-fcts = yes" in its
Makefiles and it does define __NO_LONG_DOUBLE_MATH in its installed
headers, it will currently create exported symbols for __finitel,
__isinfl, and __isnanl that can't be reached from userspace by
correct use of the finite(), isinf(), or isnan() macros in <math.h>.
To avoid this situation, by default for such platforms we now no
longer export these symbols, thus causing appropriate link-time
errors. However, for platforms that previously exported these
symbols, we continue to do so as compat symbols; this is enabled
by adding LDBL_CLASSIFY_COMPAT to math_private.h for the platform.
For tile, remove the now-unnecessary exports of those functions from
libc and libm.
Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_isnan.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_isnan.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_isnan.c b/sysdeps/ieee754/dbl-64/s_isnan.c index 5d9f31be20..2174d988d8 100644 --- a/sysdeps/ieee754/dbl-64/s_isnan.c +++ b/sysdeps/ieee754/dbl-64/s_isnan.c @@ -21,6 +21,7 @@ static char rcsid[] = "$NetBSD: s_isnan.c,v 1.8 1995/05/10 20:47:36 jtc Exp $"; #include <math.h> #include <math_private.h> +#include <shlib-compat.h> #undef __isnan int @@ -36,6 +37,8 @@ __isnan (double x) hidden_def (__isnan) weak_alias (__isnan, isnan) #ifdef NO_LONG_DOUBLE -strong_alias (__isnan, __isnanl) +# if defined LDBL_CLASSIFY_COMPAT && SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_23) +compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0); +# endif weak_alias (__isnan, isnanl) #endif |