Re: libstdc++/8197: std::sin(float) causes undefined reference to sinf

[Gabriel Dos Reis <gdr at integrable-solutions dot net>]

The following reply was made to PR libstdc++/8197; it has been noted by GNATS.

From: Gabriel Dos Reis <gdr@integrable-solutions.net>
To: "Christian Ehrhardt" <ehrhardt@mathematik.uni-ulm.de>
Cc: gcc-gnats@gcc.gnu.org, libstdc++@gcc.gnu.org
Subject: Re: libstdc++/8197: std::sin(float) causes undefined reference to sinf
Date: 27 Oct 2002 23:41:47 +0100

 "Christian Ehrhardt" <ehrhardt@mathematik.uni-ulm.de> writes:
 
 |  I got some more information on this one and a patch that fixes the
 |  problem for me:
 
 Thanks for reporting more info on this issue.
 
 [...]
 
 |  The problem seems to be that std::sin(float) is an inline function defined in
 |  cmath. This inline function uses __builtin_sinf which in turn generates
 |  a reference to a function sinf.
 |  This function even exists and is exported from stubs.o:
 |  
 |  turing# nm sparc-sun-solaris2.9/libstdc++-v3/libmath/stubs.o  |grep sinf
 |  00000714 T sinf
 |  
 |  However, in libstdc++.so the symbol sinf is private:
 
 Benjamin,
 
   Do we have infrastructure to export symbols based on target
 configurations?  If not, does telling linker-map.gnu to export
 non-existing symbols an error?  If not, is it documented to work as
 "expected"?
 
 Thanks,
 
 -- Gaby
 PS: I just realized I asked more questions that could provide any hints.