Mercurial > gnulib
view m4/exp2f.m4 @ 40246:c34f677e6117 default tip master
_Noreturn: GCC 4.7 does not support [[noreturn]] in C++11 mode
* lib/_Noreturn.h, m4/gnulib-common.m4: Don't use [[noreturn]] before
GCC 4.8.
author | Akim Demaille <akim.demaille@gmail.com> |
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date | Sun, 17 Mar 2019 19:27:20 +0100 |
parents | b06060465f09 |
children |
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# exp2f.m4 serial 1 dnl Copyright (C) 2011-2019 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. AC_DEFUN([gl_FUNC_EXP2F], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_EXP2]) dnl Persuade glibc <math.h> to declare exp2f(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether exp2f() exists. Assume that exp2f(), if it exists, is dnl defined in the same library as exp2(). save_LIBS="$LIBS" LIBS="$LIBS $EXP2_LIBM" AC_CHECK_FUNCS([exp2f]) LIBS="$save_LIBS" if test $ac_cv_func_exp2f = yes; then HAVE_EXP2F=1 EXP2F_LIBM="$EXP2_LIBM" dnl Also check whether it's declared. dnl IRIX 6.5 has exp2f() in libm but doesn't declare it in <math.h>. AC_CHECK_DECL([exp2f], , [HAVE_DECL_EXP2F=0], [[#include <math.h>]]) else HAVE_EXP2F=0 HAVE_DECL_EXP2F=0 dnl Find libraries needed to link lib/exp2f.c. EXP2F_LIBM="$EXP2_LIBM" fi AC_SUBST([EXP2F_LIBM]) ])