Mercurial > gnulib
view m4/sqrtf.m4 @ 17364:7524d97ae56f
stdalign: port to stricter ISO C11
ISO C11 says that _Alignof's operand must be a parenthesized type.
Problem reported by Eli Zaretskii in
<http://lists.gnu.org/archive/html/emacs-devel/2013-03/msg00960.html>.
* doc/posix-headers/stdalign.texi (stdalign.h): Document this.
* m4/stdalign.m4 (gl_STDALIGN_H): Don't use _Alignof (expr).
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Fri, 29 Mar 2013 19:47:13 -0700 |
| parents | e542fd46ad6f |
| children | 344018b6e5d7 |
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# sqrtf.m4 serial 2 dnl Copyright (C) 2011-2013 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_SQRTF], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_SQRT]) dnl Persuade glibc <math.h> to declare sqrtf(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether sqrtf() exists. Assume that sqrtf(), if it exists, is dnl defined in the same library as sqrt(). save_LIBS="$LIBS" LIBS="$LIBS $SQRT_LIBM" AC_CHECK_FUNCS([sqrtf]) LIBS="$save_LIBS" if test $ac_cv_func_sqrtf = yes; then SQRTF_LIBM="$SQRT_LIBM" else HAVE_SQRTF=0 SQRTF_LIBM="$SQRT_LIBM" fi AC_SUBST([SQRTF_LIBM]) ])