1
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mirror of https://git.dev.opencascade.org/repos/occt.git synced 2025-04-03 17:56:21 +03:00
ddzama 3536158f11 0033153: Configuration: Linker error when building from source for VS2022 x64.
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
2022-10-31 18:16:19 +03:00

Open CASCADE Technology
=======================

This directory contains sources of Open CASCADE Technology (OCCT), a software
development platform providing services for 3D surface and solid modeling, CAD 
data exchange, and visualization. Most of OCCT functionality is available in 
the form of C++ libraries. OCCT can be best applied in development of software 
dealing with 3D modeling (CAD), manufacturing / measuring (CAM) or numerical 
simulation (CAE).

License
-------

Open CASCADE Technology is free software; you can redistribute it and / or 
modify it under the terms of the GNU Lesser General Public version 2.1 as 
published by the Free Software Foundation, with special exception defined in 
the file OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included
in OCCT distribution for complete text of the license.

Alternatively, Open CASCADE Technology may be used under the terms of Open 
CASCADE commercial license or contractual agreement.

Note that Open CASCADE Technology is provided on an "AS IS" basis, WITHOUT 
WARRANTY OF ANY KIND. The entire risk related to any use of the OCCT code and 
materials is on you. See the license text for formal disclaimer.

Packaging
---------

You can receive certified version of OCCT code in different packages.

- Snapshot of Git repository: contains C++ header and source files of OCCT,
  documentation sources, build scripts, and CMake project files.

- Complete source archive: contains all sources of OCCT, generated HTML and PDF
  documentation, and ready-to-use projects for building on all officially 
  supported platforms.

- Binary package (platform-specific): in addition to complete source archive, 
  it includes binaries of OCCT and third-party libraries built on one platform. 
  This package allows using OCCT immediately after installation.

Certified versions of OCCT can be downloaded from http://www.opencascade.com

You can also find OCCT pre-installed on your system, or install it from 
packages provided by a third party. Note that packaging and functionality
of such versions can be different from certified releases. Please consult 
documentation accompanying your version for details.

Documentation
-------------

Open file doc/html/index.html to browse HTML documentation.

If HTML documentation is not available in your package, you can:

- Generate it from sources. 

  You need to have Tcl and Doxygen 1.8.4 (or above) installed on your system.
  and accessible in your environment (check environment variable PATH).
  Use batch file *gendoc.bat* on Windows or Bash script *gendoc* on Linux
  or OS X to (re)generate documentation.

- Read documentation in source plain text (MarkDown) format found in 
  subfolder *dox*

See *dox/dev_guides/documentation/documentation.md* for details.

Building
--------

In most cases you need to rebuild OCCT on your platform (OS, compiler) before
using it in your project, to ensure binary compatibility.

Consult the file *dox/dev_guides/building/building.md* for instructions on
building OCCT from sources on supported platforms.

Version
-------

The current version of OCCT can be consulted in the file
*src/Standard/Standard_Version.hxx*

Development
-----------

For information regarding OCCT code development please consult the official 
OCCT Collaborative Development Portal:
http://dev.opencascade.org
Description
Mirror of OpenCascade OCCT, at https://git.dev.opencascade.org/repos/occt
Readme 167 MiB
Languages
C++ 98.1%
CMake 1%
Tcl 0.3%
C 0.2%
GLSL 0.1%