Re: [Boost-build] error: redefinition of 'double acosh(double)'

Subject: Re: [Boost-build] error: redefinition of 'double acosh(double)'
From: John Maddock (john_at_[hidden])
Date: 2009-03-14 14:26:13

> I am trying to build boost-1.38.0 and it gives me the following error
>
> libs/math/build/../src/tr1/acosh.cpp: In function 'double acosh(double)':
> libs/math/build/../src/tr1/acosh.cpp:11: error: redefinition of 'double 
> acosh(double)'
> /usr/include/bits/mathinline.h:559: error: 'double acosh(double)' 
> previously defined here
> ...failed updating 1 target...

>From a practical viewpoint, if you don't want to use the C99 math functions 
as extern "C" functions then you can ignore this and move on.

However, we really need to fix this - it seems from Googling around that 
glibc may (or may not, depending on the platform) define some of the C99 
functions as inline after including math.h.  Which is pretty all round nasty 
as it prevents us from providing are own definitions (and isn't std 
conforming either for that matter).  I'm at a bit of a loss to know what to 
do here (other than rewriting the library!).  Anyone know if there is there 
any way to turn off the use of these inline intrinsics by gcc?  If so then 
we could just patch the Jamfile as a first step...

John.