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Re: [PATCH]: fix the --with-mpfr-dir=PATH configure flag


Kaveh R. GHAZI wrote:
On Sun, 19 Nov 2006, Mark Mitchell wrote:


I'm cc'ing the fortran list since they have the most experience with mpfr
and usage in previous GCC releases.  I'd like their opinion on how often
this configure flag is used so we can achieve the consensus you seek.
(Bear in mind I'm initiating this patch based on a bug report from a user,
so it's not just a gcc developer issue.)


I wouldn't use the --with-mpfr-dir switch, unless I were building on a machine where I didn't have rights to modify the installation. I used to be in that situation with HPUX and Solaris, but there is simply no way I could work with a cygwin or linux installation where I can't have the privilege to update mpfr.
Recently, cygwin adopted an up-to-date gmp. The automated installation of that broke the configuration for building gcc, but repeating installation of current mpfr with --enable-shared corrected it. As I have no reason to want the cygwin version of mpfr, over-writing it is satisfactory.
I don't suppose we would have any more influence in persuading cygwin to adopt the necessary mpfr than in adopting gcc-4.1.
I'm not particularly in favor of doing it differently for 4.1 and more recent versions.



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