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view m4/atan2f.m4 @ 16768:cd4aba7fcd3e
New module 'ilogbl'.
* lib/math.in.h (ilogbl): New declaration.
* lib/ilogbl.c: New file.
* m4/ilogbl.m4: New file.
* m4/math_h.m4 (gl_MATH_H): Test whether ilogbl is declared.
(gl_MATH_H_DEFAULTS): Initialize GNULIB_ILOGBL, HAVE_ILOGBL.
* modules/math (Makefile.am): Substitute GNULIB_ILOGBL, HAVE_ILOGBL.
Split sed invocation, to avoid the limit of 100 substitutions of
HP-UX 'sed'.
* modules/ilogbl: New file.
* tests/test-math-c++.cc: Check the declaration of ilogbl.
* doc/posix-functions/ilogbl.texi: Mention the new module.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Tue, 03 Apr 2012 21:58:52 +0200 |
| parents | fdbe3125f81a |
| children | e542fd46ad6f |
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# atan2f.m4 serial 2 dnl Copyright (C) 2011-2012 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_ATAN2F], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_ATAN2]) dnl Persuade glibc <math.h> to declare atan2f(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether atan2f() exists. Assume that atan2f(), if it exists, is dnl defined in the same library as atan2(). save_LIBS="$LIBS" LIBS="$LIBS $ATAN2_LIBM" AC_CHECK_FUNCS([atan2f]) LIBS="$save_LIBS" if test $ac_cv_func_atan2f = yes; then ATAN2F_LIBM="$ATAN2_LIBM" else HAVE_ATAN2F=0 ATAN2F_LIBM="$ATAN2_LIBM" fi AC_SUBST([ATAN2F_LIBM]) ])