With enabled flag BUILD_USE_PCH we get an error of compilation of TKService:
1>Image_VideoRecorder.obj :
error LNK2019:
unresolved external symbol
"int __cdecl av_strerror(int,char *,unsigned __int64)"
(?av_strerror@@YAHHPEAD_K@Z) referenced in function
"protected: class TCollection_AsciiString __cdecl Image_VideoRecorder::formatAvError(int)const "
(?formatAvError@Image_VideoRecorder@@IEBA?AVTCollection_AsciiString@@H@Z)
1>Media_FormatContext.obj :
error LNK2001:
unresolved external symbol
"int __cdecl av_strerror(int,char *,unsigned __int64)" (?av_strerror@@YAHHPEAD_K@Z)
And many other similar errors. Similar errors occures in some other projects too:
TKService
TKOpenGl
TKOpenGles
TKXCAF
TKXDEDRAW
TKDFBrowser
TKMessageModel
TKMessageView
TKShapeView
TKTInspector
TKTreeModel
TKVInspector
TKView
Proposed solution: turn off cotire from targets, whose compilation cause error while applying cotire tool.
In this ticket migration to cotire 1.8.1 (from 1.7.9) is done.
COTIRE_PREFIX_HEADER_IGNORE_PATH does not apply here, because its employing
causes some errors in 3rdparty libraries (for example, in TKService project).
Projects (TKDFBrowser TKMessageModel TKMessageView TKShapeView TKTInspector TKTreeModel TKVInspector TKView)
which use Qt may be proceeded by cotire tool, but after fixing a bug of cotire:
https://gitlab.kitware.com/cmake/cmake/-/issues/18353
0033153: Fix cotire bug, causing impossibility of compilation targets depending from Qt.
Solution is proposed in:
https://gitlab.kitware.com/cmake/cmake/-/issues/18353
Make C++ standard to be enable from cmake settings:
User will be able choosing C++ language standard by selecting cmake variable BUILD_CPP_STANDARD.
For correct working, CMAKE_CXX_STANDARD cmake built-in variable should be available.
To enable CMAKE_CXX_STANDARD, minimum CMAKE version has been updated to 3.1.
Available next standard items:
C++11
C++14
C++17
C++20
C++23
This issue consists from several steps to achive main goal:
1) Configuratiuon, CMake - allow selecting C++ standard.
2) Require minimum CMAKE version 3.1 (for enabling CMAKE_CXX_STANDARD).
3) More flexible CMAKE_CXX_COMPILER_ID identification (fixups previous commit!)
4) Add description of new CMAKE variable `BUILD_CPP_STANDARD` into documentation.
5) Update CMAKE requirements in documentation.
6) Set C++11 standard for several projects.
Use of Cotire tool is introduced for acceleration of CMake builds, by usage of precompiled headers.
CMake option BUILD_USE_PCH is added to enable / disable use of precompiled headers
When precompiled headers are used, additional compiler macros are defined globally in the build system to avoid problems due to different order of included files:
- NOMINMAX is defined on Windows to prevent defining "min" and "max" as macros by windows.h
- STRSAFE_NO_DEPRECATE and _SCL_SECURE_NO_WARNINGS are defined on Windows to prevent declaring functions of standard C library as deprecated by #pragma, and other warnings in system headers
- GL_GLEXT_LEGACY and GLX_GLEXT_LEGACY are defined to ensure that only OCCT's own glext.h is used
- __STDC_FORMAT_MACROS is defined to have standard C print format macros always defined
Code is corrected to avoid conflicts with system headers and in case of compiling together as unity builds (partially):
- Some locally defined variables in TKV3d, TKHLR are renamed to be unique
- Duplicated definitions of macros and global functions are eliminated in TKSTEP
- Useless header WNT_UInt.hxx is removed
- Usage of local variables conflicting with X11 macro is avoided in Draw_Viewer.cxx
- Local variables in AIS_ConcentricRelation.cxx are renamed to avoid conflict with macros defined in windows.h
- HXX files containing code are renamed to PXX or merged with corresponding CXX files.
IVtkTools classes are corrected to avoid compiler warnings disabled in non-PCH builds by inclusion of VTK headers.
Useless pragmas disabling warnings on MSVC are removed
