leezu commented on issue #17359: Mxnet doesn't install for R if OpenCV is build on linux URL: https://github.com/apache/incubator-mxnet/issues/17359#issuecomment-577331501 @shawnbrar how did you generate `opencv4.pc`? I tried compiling OpenCV 4.2 from source but didn't get a `opencv4.pc`. In any case, this issue can be fixed by the following patch: ``` patch modified R-package/src/Makevars @@ -1,4 +1,4 @@ CXX_STD = CXX11 -PKG_LIBS = $(LAPACK_LIBS) $(BLAS_LIBS) `pkg-config --libs opencv` -PKG_CFLAGS = `pkg-config --cflags opencv` -PKG_CPPFLAGS = -I../inst/include `pkg-config --cflags opencv` `Rscript -e 'Rcpp:::CxxFlags()'` +PKG_LIBS = $(LAPACK_LIBS) $(BLAS_LIBS) `(pkg-config --cflags opencv || pkg-config --cflags opencv4)` +PKG_CFLAGS = `(pkg-config --cflags opencv || pkg-config --cflags opencv4)` +PKG_CPPFLAGS = -I../inst/include `(pkg-config --cflags opencv || pkg-config --cflags opencv4)` `Rscript -e 'Rcpp:::CxxFlags()'` ```
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