diff options
Diffstat (limited to 'gnulib-m4/isnand.m4')
| -rw-r--r-- | gnulib-m4/isnand.m4 | 59 |
1 files changed, 30 insertions, 29 deletions
diff --git a/gnulib-m4/isnand.m4 b/gnulib-m4/isnand.m4 index cd916284..4d5c615b 100644 --- a/gnulib-m4/isnand.m4 +++ b/gnulib-m4/isnand.m4 @@ -1,5 +1,5 @@ -# isnand.m4 serial 6 -dnl Copyright (C) 2007-2010 Free Software Foundation, Inc. +# isnand.m4 serial 11 +dnl Copyright (C) 2007-2015 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -24,7 +24,6 @@ AC_DEFUN([gl_FUNC_ISNAND], else gl_func_isnand=no HAVE_ISNAND=0 - gl_BUILD_ISNAND fi AC_SUBST([ISNAND_LIBM]) ]) @@ -34,19 +33,17 @@ dnl Check how to get or define isnand() without linking with libm. AC_DEFUN([gl_FUNC_ISNAND_NO_LIBM], [ gl_HAVE_ISNAND_NO_LIBM + gl_func_isnand_no_libm=$gl_cv_func_isnand_no_libm if test $gl_cv_func_isnand_no_libm = yes; then AC_DEFINE([HAVE_ISNAND_IN_LIBC], [1], [Define if the isnan(double) function is available in libc.]) - else - gl_BUILD_ISNAND fi ]) -dnl Pull in replacement isnand definition. It does not need -lm. -AC_DEFUN([gl_BUILD_ISNAND], +dnl Prerequisites of replacement isnand definition. It does not need -lm. +AC_DEFUN([gl_PREREQ_ISNAND], [ - AC_LIBOBJ([isnand]) - gl_DOUBLE_EXPONENT_LOCATION + AC_REQUIRE([gl_DOUBLE_EXPONENT_LOCATION]) ]) dnl Test whether isnand() can be used with libm. @@ -58,16 +55,18 @@ AC_DEFUN([gl_HAVE_ISNAND_IN_LIBM], [ save_LIBS="$LIBS" LIBS="$LIBS -lm" - AC_TRY_LINK([#include <math.h> - #if __GNUC__ >= 4 - # undef isnand - # define isnand(x) __builtin_isnand ((double)(x)) - #elif defined isnan - # undef isnand - # define isnand(x) isnan ((double)(x)) - #endif - double x;], - [return isnand (x);], + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#include <math.h> + #if __GNUC__ >= 4 + # undef isnand + # define isnand(x) __builtin_isnan ((double)(x)) + #elif defined isnan + # undef isnand + # define isnand(x) isnan ((double)(x)) + #endif + double x;]], + [[return isnand (x);]])], [gl_cv_func_isnand_in_libm=yes], [gl_cv_func_isnand_in_libm=no]) LIBS="$save_LIBS" @@ -79,16 +78,18 @@ AC_DEFUN([gl_HAVE_ISNAND_NO_LIBM], AC_CACHE_CHECK([whether isnan(double) can be used without linking with libm], [gl_cv_func_isnand_no_libm], [ - AC_TRY_LINK([#include <math.h> - #if __GNUC__ >= 4 - # undef isnand - # define isnand(x) __builtin_isnan ((double)(x)) - #else - # undef isnand - # define isnand(x) isnan ((double)(x)) - #endif - double x;], - [return isnand (x);], + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#include <math.h> + #if __GNUC__ >= 4 + # undef isnand + # define isnand(x) __builtin_isnan ((double)(x)) + #else + # undef isnand + # define isnand(x) isnan ((double)(x)) + #endif + double x;]], + [[return isnand (x);]])], [gl_cv_func_isnand_no_libm=yes], [gl_cv_func_isnand_no_libm=no]) ]) |