bug#42667: opencv fails to build

[Guillaume Le Vaillant]

When trying to build the opencv package , I get the following error:

--8<---------------cut here---------------start------------->8---
[ 27%] Building CXX object 
modules/imgcodecs/CMakeFiles/opencv_imgcodecs.dir/src/grfmt_pxm.cpp.o
cd /tmp/guix-build-opencv-3.4.3.drv-0/build/modules/imgcodecs && 
/gnu/store/rn75fm7adgx3pw5j8pg3bczfqq1y17lk-gcc-7.5.0/bin/c++  -DCVAPI_EXPORTS 
-DHAVE_IMGCODEC_HDR -DHAVE_IMGCODEC_PXM -DHAVE_IMGCODEC_SUNRASTER -DHAVE_WEBP 
-D_USE_MATH_DEFINES -D__OPENCV_BUILD=1 -D__STDC_CONSTANT_MACROS 
-D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS 
-I/tmp/guix-build-opencv-3.4.3.drv-0/opencv-3.4.3-checkout/modules/imgcodecs/include
 -I/tmp/guix-build-opencv-3.4.3.drv-0/build/modules/imgcodecs 
-I/tmp/guix-build-opencv-3.4.3.drv-0/opencv-3.4.3-checkout/modules/core/include 
-I/tmp/guix-build-opencv-3.4.3.drv-0/opencv-3.4.3-checkout/modules/imgproc/include
 -isystem /tmp/guix-build-opencv-3.4.3.drv-0/build -isystem 
/gnu/store/7xqvr2nr5g1cw9kwc0rdlhg92zg5zi44-openexr-2.5.2/include/OpenEXR  
-fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor 
-Werror=address -Werror=sequence-point -Wformat -Werror=format-security 
-Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow 
-Wsign-promo -Wuninitialized -Winit-self -Wsuggest-override -Wno-narrowing 
-Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 
-fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer 
-ffunction-sections -fdata-sections  -msse -msse2 -fvisibility=hidden 
-fvisibility-inlines-hidden -Wno-deprecated-declarations -O2 -g -DNDEBUG -fPIC  
 -o CMakeFiles/opencv_imgcodecs.dir/src/grfmt_pxm.cpp.o -c 
/tmp/guix-build-opencv-3.4.3.drv-0/opencv-3.4.3-checkout/modules/imgcodecs/src/grfmt_pxm.cpp
/tmp/guix-build-opencv-3.4.3.drv-0/opencv-3.4.3-checkout/modules/imgcodecs/src/grfmt_jpeg2000.cpp:
 In member function ‘bool cv::Jpeg2KDecoder::readComponent8u(uchar*, void*, 
int, int, int, int, int)’:
/tmp/guix-build-opencv-3.4.3.drv-0/opencv-3.4.3-checkout/modules/imgcodecs/src/grfmt_jpeg2000.cpp:340:71:
 error: lvalue required as unary ‘&’ operand
         jas_seqent_t* pix_row = &jas_matrix_get( buffer, y / ystep, 0 );
                                                                       ^
/tmp/guix-build-opencv-3.4.3.drv-0/opencv-3.4.3-checkout/modules/imgcodecs/src/grfmt_jpeg2000.cpp:
 In member function ‘bool cv::Jpeg2KDecoder::readComponent16u(short unsigned 
int*, void*, int, int, int, int, int)’:
/tmp/guix-build-opencv-3.4.3.drv-0/opencv-3.4.3-checkout/modules/imgcodecs/src/grfmt_jpeg2000.cpp:404:71:
 error: lvalue required as unary ‘&’ operand
         jas_seqent_t* pix_row = &jas_matrix_get( buffer, y / ystep, 0 );
                                                                       ^
--8<---------------cut here---------------end--------------->8---

signature.asc
Description: PGP signature