RFR(XS) 8003591: Abstract_VM_Version::internal_vm_info_string needs to stringify FLOAT_ARCH for ease of use

[Coleen Phillimore]

Looks good to me.
Coleen

On 11/20/2012 11:56 PM, David Holmes wrote:
> http://cr.openjdk.java.net/~dholmes/8003591/webrev/
>
> The internal version string can use the FLOAT_ARCH define to provide 
> additional information regarding the floating-point architecture that 
> was being built for. At present FLOAT_ARCH is required to be a string 
> literal. This can be set at build time by using:
>
> gcc -DFLOAT_ARCH="-my-arch"
>
> However this becomes problematic if you want to set a make variable 
> that will add the -D, or worse a script variable that sets a make 
> variable that sets -D, because you have to provide a means to escape 
> the string-ness of the value at each level so that we finally get a 
> string literal as expected.
>
> This fix changes things so that FLOAT_ARCH is not a string literal, 
> but is converted to one using XSTR. So now you can specify
>
> -DFLOAT_ARCH=-my-arch
>
> regardless of how many layers of scripts or makefile invocations you 
> have to survive.
>
> Thanks,
> David