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Open Source Computer Vision Library
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Khem Raj a4f53988c4 Check for clang before using -isystem 
When cross compiling with clang, the internal C++ headers are not found
when adding sysroot to -isystem, that is redundant anyway because it
will look for headers insider --sysroot path with same quality as it
would do with -isystem otherwise

Fixes errors like

FAILED: 3rdparty/openexr/CMakeFiles/IlmImf.dir/Iex/IexBaseExc.cpp.o
....
In file included from
TOPDIR/build/tmp/work/cortexa7t2hf-neon-vfpv4-bec-linux-musleabi/opencv/3.4.3+gitAUTOINC+b38c50b3d0_1f6d6f0626_bdb7bb85f3_34e4206aef_fccf7cd6a4-r0/git/3rdparty/openexr/Iex/IexBaseExc.cpp:43:
In file included from
TOPDIR/build/tmp/work/cortexa7t2hf-neon-vfpv4-bec-linux-musleabi/opencv/3.4.3+gitAUTOINC+b38c50b3d0_1f6d6f0626_bdb7bb85f3_34e4206aef_fccf7cd6a4-r0/git/3rdparty/openexr/Iex/IexBaseExc.h:48:
In file included from
TOPDIR/build/tmp/work/cortexa7t2hf-neon-vfpv4-bec-linux-musleabi/opencv/3.4.3+gitAUTOINC+b38c50b3d0_1f6d6f0626_bdb7bb85f3_34e4206aef_fccf7cd6a4-r0/recipe-sysroot/usr/lib//arm-bec-linux-musleabi/8.2.0/../../../include/c++/8.2.0/string:52:
In file included from
TOPDIR/build/tmp/work/cortexa7t2hf-neon-vfpv4-bec-linux-musleabi/opencv/3.4.3+gitAUTOINC+b38c50b3d0_1f6d6f0626_bdb7bb85f3_34e4206aef_fccf7cd6a4-r0/recipe-sysroot/usr/lib//arm-bec-linux-musleabi/8.2.0/../../../include/c++/8.2.0/bits/basic_string.h:6391:
In file included from
TOPDIR/build/tmp/work/cortexa7t2hf-neon-vfpv4-bec-linux-musleabi/opencv/3.4.3+gitAUTOINC+b38c50b3d0_1f6d6f0626_bdb7bb85f3_34e4206aef_fccf7cd6a4-r0/recipe-sysroot/usr/lib//arm-bec-linux-musleabi/8.2.0/../../../include/c++/8.2.0/ext/string_conversions.h:41:
TOPDIR/build/tmp/work/cortexa7t2hf-neon-vfpv4-bec-linux-musleabi/opencv/3.4.3+gitAUTOINC+b38c50b3d0_1f6d6f0626_bdb7bb85f3_34e4206aef_fccf7cd6a4-r0/recipe-sysroot/usr/lib//arm-bec-linux-musleabi/8.2.0/../../../include/c++/8.2.0/cstdlib:75:15:
fatal error: 'stdlib.h' file not found
              ^~~~~~~~~~
1 error generated.

Signed-off-by: Khem Raj <raj.khem@gmail.com>
2018-09-12 18:16:39 -07:00
.github migration: github.com/opencv/opencv 2016-07-12 12:51:12 +03:00
3rdparty build: eliminate GCC8 warnings 2018-07-16 17:24:12 +03:00
apps Utilize CV_UNUSED macro 2018-09-07 20:33:52 +09:00
cmake Check for clang before using -isystem 2018-09-12 18:16:39 -07:00
data Some mist. typo fixes 2018-02-07 06:59:15 -05:00
doc Merge pull request #12206 from jsxyhelu/3.4 2018-09-11 23:58:01 +03:00
include add missing DNN header to opencv2/opencv.hpp 2018-02-15 15:59:14 +01:00
modules Merge pull request #12494 from DEEPIR:3.4 2018-09-11 19:38:00 +00:00
platforms Merge pull request #12411 from vpisarev:wide_convert 2018-09-06 19:36:59 +03:00
samples Merge pull request #12206 from jsxyhelu/3.4 2018-09-11 23:58:01 +03:00
.gitattributes cmake: generate and install ffmpeg-download.ps1 2018-06-09 13:19:48 +03:00
.gitignore git: .gitignore update 2017-11-07 17:24:48 +03:00
CMakeLists.txt cmake: WITH_GPHOTO2=OFF by default 2018-08-23 19:48:23 +00:00
CONTRIBUTING.md migration: github.com/opencv/opencv 2016-07-12 12:51:12 +03:00
LICENSE copyright: 2018 2018-01-16 13:55:42 +03:00
README.md Improve README (#9243) 2017-09-13 17:58:34 +03:00

README.md

OpenCV: Open Source Computer Vision Library

Resources

Contributing

Please read the contribution guidelines before starting work on a pull request.

Summary of the guidelines:

  • One pull request per issue;
  • Choose the right base branch;
  • Include tests and documentation;
  • Clean up "oops" commits before submitting;
  • Follow the coding style guide.