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# powf.m4 serial 2
dnl Copyright (C) 2011-2023 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_POWF],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
AC_REQUIRE([gl_FUNC_POW])
dnl Persuade glibc <math.h> to declare powf().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
dnl Test whether powf() exists. Assume that powf(), if it exists, is
dnl defined in the same library as pow().
save_LIBS="$LIBS"
LIBS="$LIBS $POW_LIBM"
AC_CHECK_FUNCS([powf])
LIBS="$save_LIBS"
if test $ac_cv_func_powf = yes; then
POWF_LIBM="$POW_LIBM"
else
HAVE_POWF=0
POWF_LIBM="$POW_LIBM"
fi
AC_SUBST([POWF_LIBM])
])
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