This page is to log the progress of an initiative to reduce the number and impact of compiler warnings emitted from Boost code.

The priorities are:

• Boost headers: warnings emitted with a long template instantiation back trace are particularly troublesome.
• Boost source code: Users building Boost on their platform should ideally see a clean build with no warnings.
• Core libraries, that are reused by other Boost libraries.

The main test compilers and flags are:

• Microsoft Visual C++ (Current latest stable release is 2008), with /W4.
• GNU GCC (Current latest stable release is 4.4.x) with /Wall /Wextra -pedantic.

In addition if library test cases can be made warning free, then we can begin to enforce a no-warnings policy by testing with warnings-as-errors with the above compilers.

Library	Owner	Status	Notes
Config	johnmaddock	Clean	Only headers are clean, I haven't looked at the tests.
Type Traits	johnmaddock	Clean	One test has (unfixable?) warnings with gcc.
Regex	johnmaddock	Clean
Test	johnmaddock	​Patches	A couple of tests still produce warnings: Jamfile issues?
Thread		Warnings
Date Time		Warnings
Program Options		Warnings
MPL		unknown
Preprocessor		unknown
Any		unknown
Array		unknown
Bind		unknown
Call Traits		unknown
Compressed Pair		unknown
Concept Check		unknown
Conversion		unknown
Enable If		unknown
Exception		unknown
Filesystem		unknown
For Each		unknown
Format		unknown
Function		unknown
Function Types		unknown
Hash		unknown
Integer		unknown
Iterators		unknown
Min Max		unknown
Operators		unknown
Optional		unknown
Parameter		unknown
Pool		unknown
Serialization		unknown
Smart Ptr		unknown
Spirit		unknown
Static Assert		unknown
Swap		unknown
System		unknown
Timer		unknown
Tuple		unknown
Typeof		unknown
Unordered		unknown
Utility		unknown

Please set the Status field above to one of:

• unknown - library hasn't been tested for warnings yet.
• warnings - we know that the library has warnings, but no one has done anything about it yet.
• bug - if a bug report has been filed on the trac (with link)
• patch - if a Trac patch has been filed (with link).
• clean - fixes are in Trunk.
• release - fixes are in release branch.

Please set the owner field to the Trac user ID of the person currently investigating so that we don't duplicate effort.

Libraries can be tested by cd'ing into boost-root/libname/test and invoking:

bjam msvc warnings=all

or

bjam gcc warnings=all cxxflags=-Wextra