2 dnl Copyright (C) 2011-2012 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_FUNC_LOG10F],
9 AC_REQUIRE([gl_MATH_H_DEFAULTS])
10 AC_REQUIRE([gl_FUNC_LOG10])
12 dnl Persuade glibc <math.h> to declare log10f().
13 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
15 dnl Test whether log10f() exists. Assume that log10f(), if it exists, is
16 dnl defined in the same library as log10().
18 LIBS="$LIBS $LOG10_LIBM"
19 AC_CHECK_FUNCS([log10f])
21 if test $ac_cv_func_log10f = yes; then
22 LOG10F_LIBM="$LOG10_LIBM"
25 LOG10F_LIBM="$LOG10_LIBM"
27 AC_SUBST([LOG10F_LIBM])