Opened 14 years ago
Closed 14 years ago
#2111 closed Feature Requests (wontfix)
boost headers always include too many platform headers
| Reported by: | Alessio | Owned by: | John Maddock |
|---|---|---|---|
| Milestone: | Boost 1.36.0 | Component: | config |
| Version: | Boost 1.35.0 | Severity: | Problem |
| Keywords: | Cc: |
Description
#including boost/config.hpp on MSVC causes the inclusion of a large number of platform header files (see below for a boost 1.32 example for shared_ptr.hpp). This *seriously* degrades compilation times. For large systems with >1MLOC the degradation is just impratical and puts off big projects from using boost completely.
boost/config.h should be split into smaller function-specific header files (e.g. strings, streams, threads, etc.) and every boost header file should include only the functions it needs.
Note: including file: c:\Boost\include\boost-1_32\boost/shared_ptr.hpp Note: including file: c:\Boost\include\boost-1_32\boost/config.hpp Note: including file: c:\Boost\include\boost-1_32\boost/config/user.hpp Note: including file: c:\Boost\include\boost-1_32\boost/config/select_compiler_config.hpp Note: including file: c:\Boost\include\boost-1_32\boost/config/compiler/visualc.hpp Note: including file: c:\Boost\include\boost-1_32\boost/config/select_stdlib_config.hpp Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\utility Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\iosfwd Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\cstdio Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\yvals.h Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\use_ansi.h Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\stdio.h Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\cstring Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\string.h Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\cwchar Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\wchar.h Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\xstddef Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\cstddef Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\stddef.h Note: including file: c:\Boost\include\boost-1_32\boost/config/stdlib/dinkumware.hpp Note: including file: c:\Boost\include\boost-1_32\boost/config/select_platform_config.hpp Note: including file: c:\Boost\include\boost-1_32\boost/config/platform/win32.hpp Note: including file: c:\Boost\include\boost-1_32\boost/config/suffix.hpp Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\limits.h Note: including file: c:\Boost\include\boost-1_32\boost/assert.hpp Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\assert.h Note: including file: c:\Boost\include\boost-1_32\boost/checked_delete.hpp Note: including file: c:\Boost\include\boost-1_32\boost/throw_exception.hpp Note: including file: c:\Boost\include\boost-1_32\boost/config.hpp Note: including file: c:\Boost\include\boost-1_32\boost/detail/shared_count.hpp Note: including file: c:\Boost\include\boost-1_32\boost/config.hpp Note: including file: c:\Boost\include\boost-1_32\boost/detail/lightweight_mutex.hpp Note: including file: c:\Boost\include\boost-1_32\boost/config.hpp Note: including file: c:\Boost\include\boost-1_32\boost/detail/lwm_win32.hpp Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\memory Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\iterator Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\xutility Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\climits Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\xmemory Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\cstdlib Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\stdlib.h Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\new Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\exception Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\eh.h Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\functional Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\typeinfo Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\typeinfo.h Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\stdexcpt.h Note: including file: c:\Boost\include\boost-1_32\boost/detail/workaround.hpp Note: including file: C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\include\algorithm
Change History (4)
comment:1 by , 14 years ago
| Component: | None → Building Boost |
|---|
comment:2 by , 14 years ago
| Severity: | Showstopper → Problem |
|---|---|
| Type: | Bugs → Feature Requests |
comment:3 by , 14 years ago
| Component: | Building Boost → config |
|---|---|
| Owner: | set to |
comment:4 by , 14 years ago
| Resolution: | → wontfix |
|---|---|
| Status: | new → closed |
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The current Boost.Config has been changed to include <cstddef> rather than <utility> which cuts down the platform #includes somewhat.
Other than that, I don't see how we can streamline this: the std lib and platform feature detection code has to include a certain number of platform headers to work. I also note that the biggest pull-in of headers in your example comes from <memory>, are you really suggesting that shared_ptr could live without that #include?
Sorry, but I don't see this as a bug.