[英]MATLAB - Error compiling jpeg_read.c to create mexmaci64 file
最近我將我的 Matlab 項目從 Windows 操作系統移到了 Mac 操作系統。 所以我的 jpeg_read.mexw64 文件不再起作用,我需要創建一個與 Mac OS 兼容的新 mexmaci64 文件。 我從這里下載了 JpegToolbox,然后使用以下命令安裝了 Libjpeg:
brew install libjpeg
在 Matlab 中,我嘗試使用 mex:
>> mex -setup
MEX configured to use 'Xcode with Clang' for C language compilation.
To choose a different language, select one from the following:
mex -setup C++
mex -setup FORTRAN
MEX configured to use 'Xcode Clang++' for C++ language compilation.
>>
但是當我嘗試:
mex -I/usr/local/Cellar/jpeg/9d/include jpeg_read.c -L/usr/local/Cellar/jpeg/9d/lib
Matlab 返回以下錯誤:
Building with 'Xcode with Clang'.
/Users/folder/jpeg_toolbox/jpeg_read.c:294:39: warning: incompatible pointer types passing 'int [2]' to parameter of type 'const mwSize *' (aka 'const unsigned long *') [-Wincompatible-pointer-types]
mxtemp = mxCreateCharArray(2,dims);
^~~~
/Applications/Polyspace/R2020a/extern/include/matrix.h:958:91: note: passing argument to parameter 'dims' here
LIBMMWMATRIX_PUBLISHED_API_EXTERN_C mxArray *mxCreateCharArray(mwSize ndim, const mwSize *dims);
^
1 warning generated.
Error using mex
Undefined symbols for architecture x86_64:
"_jpeg_CreateDecompress", referenced from:
_mexFunction in jpeg_read.o
"_jpeg_destroy_decompress", referenced from:
_mexFunction in jpeg_read.o
"_jpeg_finish_decompress", referenced from:
_mexFunction in jpeg_read.o
"_jpeg_read_coefficients", referenced from:
_mexFunction in jpeg_read.o
"_jpeg_read_header", referenced from:
_mexFunction in jpeg_read.o
"_jpeg_save_markers", referenced from:
_mexFunction in jpeg_read.o
"_jpeg_std_error", referenced from:
_mexFunction in jpeg_read.o
"_jpeg_stdio_src", referenced from:
_mexFunction in jpeg_read.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
現在我該如何編譯程序? 否則,你們中有人已經得到了我需要的 mexmaci64 嗎?
當 MEX 文件使用int
而不是mwSize
作為數組大小時,通常會發生此錯誤。 只有非常舊的 MEX 文件代碼仍然這樣做。
對於這些 MEX 文件,您需要在編譯時將-compatibleArrayDims
添加到mex
命令中。 它會導致編譯器選擇舊的 32 位 API 而不是較新的 64 位 API 之一。 這確實限制了數組的最大大小,但僅限於與寫入 MEX 文件時的限制一致的方式。
另一種解決方案是重寫 MEX 文件以使用更新的 API。
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