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Viewing changes to m4source/ac_cxx_have_system_v_math.m4

  • Committer: Bazaar Package Importer
  • Author(s): Martin A. Godisch
  • Date: 2004-06-26 09:43:57 UTC
  • Revision ID: james.westby@ubuntu.com-20040626094357-3be3jwcz1vcdhpe8
Tags: upstream-20040616
Import upstream version 20040616

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m4source/ac_cxx_have_system_v_math.m4
 
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dnl Available from the GNU Autoconf Macro Archive at:
 
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dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_system_v_math.html
 
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dnl
 
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AC_DEFUN([AC_CXX_HAVE_SYSTEM_V_MATH],
 
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[AC_CACHE_CHECK(whether the compiler supports System V math library,
 
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ac_cv_cxx_have_system_v_math,
 
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[AC_LANG_SAVE
 
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 AC_LANG_CPLUSPLUS
 
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 ac_save_LIBS="$LIBS"
 
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 LIBS="$LIBS -lm"
 
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 AC_TRY_LINK([
 
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#ifndef _ALL_SOURCE
 
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 #define _ALL_SOURCE
 
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#endif
 
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#ifndef _XOPEN_SOURCE
 
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 #define _XOPEN_SOURCE
 
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#endif
 
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#ifndef _XOPEN_SOURCE_EXTENDED
 
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 #define _XOPEN_SOURCE_EXTENDED 1
 
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#endif
 
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#include <math.h>],[double x = 1.0; double y = 1.0;
 
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_class(x); ilogb(x); itrunc(x); nearest(x); rsqrt(x); uitrunc(x);
 
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copysign(x,y); drem(x,y); fmod(x,y); hypot(x,y); nextafter(x,y);
 
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remainder(x,y); scalb(x,y); unordered(x,y);
 
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return 0;],
 
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 ac_cv_cxx_have_system_v_math=yes, ac_cv_cxx_have_system_v_math=no)
 
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 LIBS="$ac_save_LIBS"
 
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 AC_LANG_RESTORE
 
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])
 
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if test "$ac_cv_cxx_have_system_v_math" = yes; then
 
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  AC_DEFINE(HAVE_SYSTEM_V_MATH,,[define if the compiler supports System V math library])
 
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fi
 
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])