Mercurial > gnulib
view m4/tanf.m4 @ 40189:3ba41edecde6
progreloc: Speed up executable lookup on various platforms.
* lib/progreloc.c: Include <errno.h>.
(safe_read, full_read): New functions.
(find_executable): On GNU/kFreeBSD, FreeBSD, DragonFly, NetBSD, Solaris,
prefer the information from the /proc file system to a PATH search.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Tue, 19 Feb 2019 21:42:54 +0100 |
parents | b06060465f09 |
children |
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# tanf.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_TANF], [ AC_REQUIRE([gl_MATH_H_DEFAULTS]) AC_REQUIRE([gl_FUNC_TAN]) dnl Persuade glibc <math.h> to declare tanf(). AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) dnl Test whether tanf() exists. Assume that tanf(), if it exists, is dnl defined in the same library as tan(). save_LIBS="$LIBS" LIBS="$LIBS $TAN_LIBM" AC_CHECK_FUNCS([tanf]) LIBS="$save_LIBS" if test $ac_cv_func_tanf = yes; then TANF_LIBM="$TAN_LIBM" else HAVE_TANF=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_tanf, not tanf. AC_CHECK_DECLS([tanf], [REPLACE_TANF=1], , [[#include <math.h>]]) TANF_LIBM="$TAN_LIBM" fi AC_SUBST([TANF_LIBM]) ])