kc3-lang/gnulib/doc/posix-headers/math.texi

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• Hash : fddec5c1
  Author :
  Date : 2011-09-30T21:07:43
  

  float, math: Fix 'int' to 'long double' conversion on Linux/SPARC64.
  
  * m4/float_h.m4 (gl_FLOAT_H): Test conversion from 'int' to
  'long double'. Set REPLACE_ITOLD.
  * lib/float.in.h (_Qp_itoq, _gl_float_fix_itold): New declarations.
  * lib/math.in.h (_Qp_itoq, _gl_math_fix_itold): New declarations.
  * lib/itold.c: New file.
  * modules/float (Files): Add lib/itold.c.
  (configure.ac): When REPLACE_ITOLD is 1, arrange to compile itold.c.
  (Makefile.am): Substitute REPLACE_ITOLD.
  * modules/math (Depends-on): Add float.
  (Makefile.am): Substitute REPLACE_ITOLD.
  * doc/posix-headers/float.texi: Mention problem on Linux/SPARC64.
  * doc/posix-headers/math.texi: Likewise.
  * doc/posix-functions/logl.texi: Likewise.
  

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• doc/posix-headers/math.texi

• @node math.h
  @section @file{math.h}
  
  POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/basedefs/math.h.html}
  
  Gnulib module: math
  
  Portability problems fixed by Gnulib:
  @itemize
  @item
  The conversion from @code{int} to @code{long double} in incorrect on some
  platforms:
  glibc 2.7 on Linux/SPARC64.
  
  @item
  The macro @code{NAN} is not defined on some platforms:
  OpenBSD 4.0, AIX 5.1, IRIX 6.5, OSF/1 5.1.
  
  @item
  The macro @code{NAN} is not exposed outside of C99 compilation on some
  platforms:
  glibc.
  
  @item
  The macros @code{NAN} and @code{HUGE_VAL} expand to a function address
  rather than a floating point constant on some platforms:
  Solaris 10.
  @end itemize
  
  Portability problems not fixed by Gnulib:
  @itemize
  @item
  @code{NAN} is not a compile time constant with some compilers:
  OSF/1 with Compaq (ex-DEC) C 6.4.
  @end itemize
  

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