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Diffstat (limited to 'newlib/libm/libm.texinfo')
| -rw-r--r-- | newlib/libm/libm.texinfo | 18 |
1 files changed, 4 insertions, 14 deletions
diff --git a/newlib/libm/libm.texinfo b/newlib/libm/libm.texinfo index f55ad72d9..a579a1743 100644 --- a/newlib/libm/libm.texinfo +++ b/newlib/libm/libm.texinfo @@ -107,23 +107,13 @@ into another language, under the above conditions for modified versions. @cindex reentrancy @cindex @code{matherr} and reentrancy When a libm function detects an exceptional case, @code{errno} may be -set, the @code{matherr} function may be called, and a error message -may be written to the standard error stream. This behavior may not -be reentrant. +set. @c The exact behavior depends on the currently selected error handling -@c mode (IEEE, POSIX, X/Open, or SVID). +@c mode (IEEE or POSIX). -With reentrant C libraries like the Red Hat newlib C library, @code{errno} is -a macro which expands to the per-thread error value. This makes it thread -safe. - -When the user provides his own @code{matherr} function it must be -reentrant for the math library as a whole to be reentrant. - -In normal debugged programs, there are usually no math subroutine -errors---and therefore no assignments to @code{errno} and no @code{matherr} -calls; in that situation, the math functions behave reentrantly. +@code{errno} is a macro which expands to the per-thread error value. +This makes it thread safe, and therefore reentrant. @node Long Double Functions @chapter The long double function support of @code{libm} |