kc3-lang/gnulib/doc/posix-functions/ldexp.texi

• Show log

  Commit

• Hash : fed956a8
  Author :
  Date : 2023-08-20T02:43:01
  

  ldexp: Work around OpenBSD/mips64 bug.
  
  * lib/math.in.h (ldexp): New declaration.
  * lib/ldexp.c: New file, based on lib/ldexpl.c.
  * lib/ldexpl.c: Moved the implementation to lib/ldexp.c. Just include
  it.
  * m4/math_h.m4 (gl_MATH_H_REQUIRE_DEFAULTS): Initialize GNULIB_LDEXP.
  (gl_MATH_H_DEFAULTS): Initialize REPLACE_LDEXP.
  * m4/ldexp.m4 (gl_FUNC_LDEXP): Require gl_MATH_H_DEFAULTS and
  gl_FUNC_ISNAND. Invoke gl_FUNC_LDEXP_WORKS. Set REPLACE_LDEXP. Consider
  it when setting LDEXP_LIBM.
  (gl_FUNC_LDEXP_WORKS): New macro.
  * modules/math (Makefile.am): Substitute GNULIB_LDEXP, REPLACE_LDEXP.
  * modules/ldexp (Files): Add lib/ldexp.c.
  (Depends-on): Add math, isnand.
  (configure.ac): Set GL_COND_OBJ_LDEXP. Invoke gl_MATH_MODULE_INDICATOR.
  (Makefile.am): Conditionally compile ldexp.c.
  * modules/ldexpl (Files): Add lib/ldexp.c.
  * doc/posix-functions/ldexp.texi: Mention the OpenBSD bug.
  

Download

• doc/posix-functions/ldexp.texi

• @node ldexp
  @section @code{ldexp}
  @findex ldexp
  
  POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/ldexp.html}
  
  Gnulib module: ldexp
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  This function produces wrong results on some platforms:
  @c ldexp(1.9269695883136991774e-308,0) returns 7.32274e-245.
  OpenBSD 7.3/mips64.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @end itemize
  

Download