Re: Using AC_LIB_HAVE_LINKFLAGS with non standard named libraries generates "non-POSIX" automake error?

[Johan Persson]

On 2013-11-23 00:39, Eric Blake wrote: 

> On 11/22/2013 04:29 PM, Johan Persson wrote:
> 
>> Fortunately that is easy (for once). The following trivial combo shows the 
>> problem.
> 
>> AC_LIB_HAVE_LINKFLAGS([[usb-1.0]],[],[],[],[libusb-1.0 Library needed.])
> 
> This macro is not provided by autoconf. (It's a shame that the macro
> author abused the AC_ namespace instead of putting it in another
> namespace, because it means if autoconf ever DOES implement this macro,
> it will break this third-party code.) You'll need to track down the

You are right! I've been using this construction for several years and I
always though this was part of the core autoconf. Looking more closely
this is provided by Gnulib module "havelib" (See
https://www.gnu.org/software/gnulib/manual/html_node/Searching-for-Libraries.html#Searching-for-Libraries
[1]) 

However, it seems thought that the macro is well behaved in that it does
normalize to "_" which means that using the variable name with "_"
instead actually works. Problem solved and I still can have warning free
code. 

Thanks for the pointers! 

--Johan 
 

Links:
------
[1]
https://www.gnu.org/software/gnulib/manual/html_node/Searching-for-Libraries.html#Searching-for-Libraries