Mercurial > gnulib
view m4/sinf.m4 @ 40209:c43e83386661
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author | Karl Berry <karl@freefriends.org> |
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date | Fri, 08 Mar 2019 09:27:47 -0800 |
parents | b06060465f09 |
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# sinf.m4 serial 3 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_SINF], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_SIN]) dnl Persuade glibc <math.h> to declare sinf(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether sinf() exists. Assume that sinf(), if it exists, is dnl defined in the same library as sin(). save_LIBS="$LIBS" LIBS="$LIBS $SIN_LIBM" AC_CHECK_FUNCS([sinf]) LIBS="$save_LIBS" if test $ac_cv_func_sinf = yes; then SINF_LIBM="$SIN_LIBM" else HAVE_SINF=0 dnl If the function is declared but does not appear to exist, it may be dnl defined as an inline function. In order to avoid a conflict, we have dnl to define rpl_sinf, not sinf. AC_CHECK_DECLS([sinf], [REPLACE_SINF=1], , [[#include <math.h>]]) SINF_LIBM="$SIN_LIBM" fi AC_SUBST([SINF_LIBM]) ])