http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58393
Bug ID: 58393
Summary: Please relax feature check for std::to_string and
std::sto* for uClibc
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: nicolas.cavallari at lri dot fr
Created attachment 30800
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30800&action=edit
Relax constraints on std::to_w?string and std:sto*
The GCC build system's feature check that must be passed to enable support for
std::to_w?string and std::sto.* asks for the underlying C library to support a
large set of C99 functions, including C99 real and complex math.
uClibc does not implement complex math function and the C99 real math functions
are optional.
The implementation of std::to_w?string and std::sto.* do not use complex math
functions and probably never will, so it is a bit sad that a libstdc++ built
against uClibc does not provide std::to_w?string and std::sto.*
The feature check should be relaxed to only requires the functions that are
actually used to implement std::to_w?string and std::sto.*
The attached patch is an example of how it could be done.
