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using __float128 and -std=c++11
- From: Peter van Hoof <p dot vanhoof at oma dot be>
- To: gcc-help at gcc dot gnu dot org
- Date: Tue, 13 Oct 2015 11:27:47 +0200
- Subject: using __float128 and -std=c++11
- Authentication-results: sourceware.org; auth=none
Consider the following program
#include <quadmath.h>
__float128 a()
{
return FLT128_MAX;
}
When I compile this with any of these commands
g++ -c prog.cc
g++ -std=c++98 -c prog.cc
g++ -std=c++03 -c prog.cc
it compiles just fine. However, when I use this
g++ -std=c++11 -c prog.cc
I get the error message
In file included from prog.cc:1:0:
prog.cc: In function â__float128 a()â:
prog.cc:5:9: error: unable to find numeric literal operator âoperator"" Qâ
return FLT128_MAX;
^
I suspect this is a compiler bug, but would like to double-check first
before submitting a report. The compiler doesn't complain about the use
of __float128, so I guess that type is deemed compliant with the C++11
standard. So I would assume that I should also be allowed to use
__float128 literals...