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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/wordsize-64 | |
| parent | b3f6040781f78af648fc90f67cec3e49a338b3e9 (diff) | |
| download | glibc-e59c94fa0e2871bdfcc363899e3be376c0def770.tar.gz glibc-e59c94fa0e2871bdfcc363899e3be376c0def770.tar.xz 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/wordsize-64')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c | 10 | ||||
| -rw-r--r-- | sysdeps/ieee754/dbl-64/wordsize-64/s_isinf.c | 5 | ||||
| -rw-r--r-- | sysdeps/ieee754/dbl-64/wordsize-64/s_isnan.c | 5 |
3 files changed, 17 insertions, 3 deletions
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c index a155a5e1ef..c8e2a7c421 100644 --- a/sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c +++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c @@ -16,6 +16,7 @@ #include <math.h> #include <math_private.h> +#include <shlib-compat.h> #include <stdint.h> #undef __finite @@ -29,6 +30,13 @@ __finite(double x) hidden_def (__finite) weak_alias (__finite, finite) #ifdef NO_LONG_DOUBLE -strong_alias (__finite, __finitel) +# ifdef LDBL_CLASSIFY_COMPAT +# if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_23) +compat_symbol (libc, __finite, __finitel, GLIBC_2_0); +# endif +# if SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_23) +compat_symbol (libm, __finite, __finitel, GLIBC_2_0); +# endif +# endif weak_alias (__finite, finitel) #endif diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_isinf.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_isinf.c index 163fc31efc..951fb73239 100644 --- a/sysdeps/ieee754/dbl-64/wordsize-64/s_isinf.c +++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_isinf.c @@ -11,6 +11,7 @@ #include <math.h> #include <math_private.h> +#include <shlib-compat.h> int __isinf (double x) @@ -25,6 +26,8 @@ __isinf (double x) hidden_def (__isinf) weak_alias (__isinf, isinf) #ifdef NO_LONG_DOUBLE -strong_alias (__isinf, __isinfl) +# if defined LDBL_CLASSIFY_COMPAT && SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_23) +compat_symbol (libc, __isinf, __isinfl, GLIBC_2_0); +# endif weak_alias (__isinf, isinfl) #endif diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_isnan.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_isnan.c index e80b84ca02..bcff9e3b67 100644 --- a/sysdeps/ieee754/dbl-64/wordsize-64/s_isnan.c +++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_isnan.c @@ -17,6 +17,7 @@ #include <math.h> #include <math_private.h> +#include <shlib-compat.h> #include <stdint.h> #undef __isnan @@ -31,6 +32,8 @@ int __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 |