From owner-freebsd-ports@freebsd.org  Thu Oct 26 08:47:26 2017
Return-Path: <owner-freebsd-ports@freebsd.org>
Delivered-To: freebsd-ports@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id A51F4E42736
 for <freebsd-ports@mailman.ysv.freebsd.org>;
 Thu, 26 Oct 2017 08:47:26 +0000 (UTC) (envelope-from rde@tavi.co.uk)
Received: from kipling.tavi.co.uk (kipling.tavi.co.uk [81.187.145.130])
 by mx1.freebsd.org (Postfix) with ESMTP id 6113871B89
 for <freebsd-ports@freebsd.org>; Thu, 26 Oct 2017 08:47:26 +0000 (UTC)
 (envelope-from rde@tavi.co.uk)
Received: from kipling.tavi.co.uk (localhost [127.0.0.1])
 by kipling.tavi.co.uk (Postfix) with ESMTP id 10F07892C3
 for <freebsd-ports@freebsd.org>; Thu, 26 Oct 2017 09:41:56 +0100 (BST)
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=tavi.co.uk; h=date:from:to
 :subject:message-id:in-reply-to:references:mime-version
 :content-type:content-transfer-encoding; s=selector1; bh=INZ5Qz0
 QTRU7a+Bwv83OpiQbHgc=; b=W79Oyr3fm7ShFLegwO77p4ZGFjVqFornK5Lmi1z
 4CtDaVcr4IAFSmfO0SpvVdSDOhGvmF4V/yWQRV6xtuNkaTAKQSfJW+qbtiztiMSy
 oHlxo0aoxSvjHSwKrJV2mOUeCPEJvXRNUXQiJ4heMasiWIBdIFfbw8tdkLH8BYKn
 8sXE=
Received: from raksha.tavi.co.uk (raksha.tavi.co.uk [81.187.145.139])
 (Authenticated sender: rde@tavi.co.uk)
 by kipling.tavi.co.uk (Postfix) with ESMTPA id D0385892BB
 for <freebsd-ports@freebsd.org>; Thu, 26 Oct 2017 09:41:55 +0100 (BST)
Date: Thu, 26 Oct 2017 09:41:55 +0100
From: Bob Eager <rde@tavi.co.uk>
To: freebsd-ports@freebsd.org
Subject: Re: can't link against math.h
Message-ID: <20171026094155.39fb5f14@raksha.tavi.co.uk>
In-Reply-To: <CALM2mE=VO3VkS3EdP4GhZRudyxcgJNQwH3vFqBUmdY3Ze3kBwQ@mail.gmail.com>
References: <CALM2mE=VO3VkS3EdP4GhZRudyxcgJNQwH3vFqBUmdY3Ze3kBwQ@mail.gmail.com>
X-Mailer: Claws Mail 3.15.0 (GTK+ 2.24.31; i386-portbld-freebsd11.0)
Face: 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====
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-ports@freebsd.org
X-Mailman-Version: 2.1.23
Precedence: list
List-Id: Porting software to FreeBSD <freebsd-ports.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-ports>,
 <mailto:freebsd-ports-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-ports/>
List-Post: <mailto:freebsd-ports@freebsd.org>
List-Help: <mailto:freebsd-ports-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-ports>,
 <mailto:freebsd-ports-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 26 Oct 2017 08:47:26 -0000

On Thu, 26 Oct 2017 10:05:00 +0800
blubee blubeeme <gurenchan@gmail.com> wrote:

> I wrote a simple test program to test and see if math.h has the
> function: exp10f
> 
> #include <math.h>
> 
> int main(int argc, char** argv)
> {
> (void)argv;
> return ((int*)(&exp10))[argc];
> }
> 
> tried compiling it with clang:
> clang++ test.cpp -o test -lm
> test.cpp:7:17: error: use of undeclared identifier 'expf10'
> return ((int*)(&expf10))[argc];
>                 ^
> 1 error generated.
> 
> tried with gcc:
> gcc test.cpp -o test -lm
> test.cpp: In function 'int main(int, char**)':
> test.cpp:7:17: error: 'expf10' was not declared in this scope
>  return ((int*)(&expf10))[argc];
> 
> Does FreeBSD math.h have expf10 and if so, how do I link against it?

It's not in the C standard (C99 or C11). So why would it be available?