----- Original Message ----- From: "John Maddock" <john@johnmaddock.co.uk> To: <boost@lists.boost.org> Sent: Saturday, June 28, 2008 10:09 AM Subject: Re: [boost] [trunk/math] Building fails.
Rene Rivera wrote:
The problem is that the Jamfile for the math lib is doing a compile test. That seems like a bad idea to me if there's no purpose other than to just do the test.
So, is there a good reason for doing that test during build?
One of the three libraries built in that Jamfile won't build on Darwin (because of no long double support for that platform in Boost.Math), the test is there to suppress building of that library in that case - without it you'll get thousands of pages of meaningless compiler errors which won't be much use to the user :-(
The same applies to cygwin gcc 3.4.6 and many others gcc.compile.c++ bin.v2\libs\math\build\has_long_double_support.test\gcc-3.4.4\debug\target-os-cygwin\threadapi-pthread\threading-multi\has_long_double_support.o libs\math\build\has_long_double_support.cpp:5:2: #error "long double support not enabled" Maybe the error message could be more explicit. The message let think that we can enable long double, but if I have understood this is just not available on some compilers/platforms. Best Vicente