[Buildroot] [PATCH 1/1] package/opencv4: fix build with gcc 4.8
Yann E. MORIN
yann.morin.1998 at free.fr
Fri Nov 12 21:50:34 UTC 2021
Fabrice, All,
On 2021-11-12 14:16 +0100, Fabrice Fontaine spake thusly:
> Fix the following build failure with gcc 4.8 raised since the addition
> of the package in commit c23612b5db036fe89accb8db48690d1ce1be4b1b:
>
> In file included from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/src/cap_ffmpeg_impl.hpp:100:0,
> from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/src/cap_ffmpeg.cpp:50:
> /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/src/cap_ffmpeg_hw.hpp: In constructor 'HWAccelIterator::HWAccelIterator(cv::VideoAccelerationType, bool, AVDictionary*)':
> /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/src/cap_ffmpeg_hw.hpp:939:23: error: use of deleted function 'std::basic_istringstream<char>& std::basic_istringstream<char>::operator=(const std::basic_istringstream<char>&)'
> s_stream_ = std::istringstream(accel_list);
> ^
> In file included from /home/buildroot/autobuild/instance-3/output-1/host/opt/ext-toolchain/arm-none-linux-gnueabi/include/c++/4.8.3/complex:45:0,
> from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/core/include/opencv2/core/cvstd.inl.hpp:47,
> from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/core/include/opencv2/core.hpp:3306,
> from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/include/opencv2/videoio.hpp:46,
> from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/src/precomp.hpp:57,
> from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/src/cap_ffmpeg.cpp:42:
> /home/buildroot/autobuild/instance-3/output-1/host/opt/ext-toolchain/arm-none-linux-gnueabi/include/c++/4.8.3/sstream:272:11: note: 'std::basic_istringstream<char>& std::basic_istringstream<char>::operator=(const std::basic_istringstream<char>&)' is implicitly deleted because the default definition would be ill-formed:
> class basic_istringstream : public basic_istream<_CharT, _Traits>
> ^
> /home/buildroot/autobuild/instance-3/output-1/host/opt/ext-toolchain/arm-none-linux-gnueabi/include/c++/4.8.3/sstream:272:11: error: use of deleted function 'std::basic_istream<char>& std::basic_istream<char>::operator=(const std::basic_istream<char>&)'
>
> Fixes:
> - http://autobuild.buildroot.org/results/60f8846b435dafda0ced412d59ffe15bdff0810d
>
> Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>
Applied to master, thanks.
Regards,
Yann E. MORIN.
> ---
> ...src-cap_ffmpeg_impl.hpp-fix-build-wi.patch | 52 +++++++++++++++++++
> 1 file changed, 52 insertions(+)
> create mode 100644 package/opencv4/0001-modules-videoio-src-cap_ffmpeg_impl.hpp-fix-build-wi.patch
>
> diff --git a/package/opencv4/0001-modules-videoio-src-cap_ffmpeg_impl.hpp-fix-build-wi.patch b/package/opencv4/0001-modules-videoio-src-cap_ffmpeg_impl.hpp-fix-build-wi.patch
> new file mode 100644
> index 0000000000..6d5d6d0647
> --- /dev/null
> +++ b/package/opencv4/0001-modules-videoio-src-cap_ffmpeg_impl.hpp-fix-build-wi.patch
> @@ -0,0 +1,52 @@
> +From 4c92a2869b9a8f736a12ba859b74e5cadce62387 Mon Sep 17 00:00:00 2001
> +From: Fabrice Fontaine <fontaine.fabrice at gmail.com>
> +Date: Fri, 12 Nov 2021 09:50:17 +0100
> +Subject: [PATCH] modules/videoio/src/cap_ffmpeg_impl.hpp: fix build with gcc
> + 4.8
> +
> +Fix the following build failure with gcc 4.8:
> +
> +In file included from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/src/cap_ffmpeg_impl.hpp:100:0,
> + from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/src/cap_ffmpeg.cpp:50:
> +/home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/src/cap_ffmpeg_hw.hpp: In constructor 'HWAccelIterator::HWAccelIterator(cv::VideoAccelerationType, bool, AVDictionary*)':
> +/home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/src/cap_ffmpeg_hw.hpp:939:23: error: use of deleted function 'std::basic_istringstream<char>& std::basic_istringstream<char>::operator=(const std::basic_istringstream<char>&)'
> + s_stream_ = std::istringstream(accel_list);
> + ^
> +In file included from /home/buildroot/autobuild/instance-3/output-1/host/opt/ext-toolchain/arm-none-linux-gnueabi/include/c++/4.8.3/complex:45:0,
> + from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/core/include/opencv2/core/cvstd.inl.hpp:47,
> + from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/core/include/opencv2/core.hpp:3306,
> + from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/include/opencv2/videoio.hpp:46,
> + from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/src/precomp.hpp:57,
> + from /home/buildroot/autobuild/instance-3/output-1/build/opencv4-4.5.4/modules/videoio/src/cap_ffmpeg.cpp:42:
> +/home/buildroot/autobuild/instance-3/output-1/host/opt/ext-toolchain/arm-none-linux-gnueabi/include/c++/4.8.3/sstream:272:11: note: 'std::basic_istringstream<char>& std::basic_istringstream<char>::operator=(const std::basic_istringstream<char>&)' is implicitly deleted because the default definition would be ill-formed:
> + class basic_istringstream : public basic_istream<_CharT, _Traits>
> + ^
> +/home/buildroot/autobuild/instance-3/output-1/host/opt/ext-toolchain/arm-none-linux-gnueabi/include/c++/4.8.3/sstream:272:11: error: use of deleted function 'std::basic_istream<char>& std::basic_istream<char>::operator=(const std::basic_istream<char>&)'
> +
> +Fixes:
> + - http://autobuild.buildroot.org/results/60f8846b435dafda0ced412d59ffe15bdff0810d
> +
> +Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>
> +[Retrieved from:
> +https://github.com/opencv/opencv/commit/4c92a2869b9a8f736a12ba859b74e5cadce62387]
> +---
> + modules/videoio/src/cap_ffmpeg_impl.hpp | 6 ++++++
> + 1 file changed, 6 insertions(+)
> +
> +diff --git a/modules/videoio/src/cap_ffmpeg_impl.hpp b/modules/videoio/src/cap_ffmpeg_impl.hpp
> +index d393b73ff4a2..76e1b855b7c8 100644
> +--- a/modules/videoio/src/cap_ffmpeg_impl.hpp
> ++++ b/modules/videoio/src/cap_ffmpeg_impl.hpp
> +@@ -93,6 +93,12 @@ extern "C" {
> + }
> + #endif
> +
> ++// GCC 4.x compilation bug. Details: https://github.com/opencv/opencv/issues/20292
> ++#if (defined(__GNUC__) && __GNUC__ < 5) && !defined(__clang__)
> ++#undef USE_AV_HW_CODECS
> ++#define USE_AV_HW_CODECS 0
> ++#endif
> ++
> + //#define USE_AV_HW_CODECS 0
> + #ifndef USE_AV_HW_CODECS
> + #if LIBAVUTIL_VERSION_MAJOR >= 56 // FFMPEG 4.0+
> --
> 2.33.0
>
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