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ubuntu编译opencv时遇到libharfbuzz.so.0: undefined reference to `FT_Reference_Fac...
source link: https://blog.popkx.com/ubuntu%E7%BC%96%E8%AF%91opencv%E6%97%B6%E9%81%87%E5%88%B0libharfbuzz-so-0-undefined-reference-to-ft_reference_face%E9%94%99%E8%AF%AF/
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ubuntu编译opencv时遇到libharfbuzz.so.0: undefined reference to `FT_Reference_Face'错误
今天在我的ubuntu16.04上编译opencv-3.4.* 时，发现如下错误：
//usr/lib/i386-linux-gnu/libharfbuzz.so.0: undefined reference to `FT_Reference_Face'
collect2: error: ld returned 1 exit status
modules/highgui/CMakeFiles/opencv_test_highgui.dir/build.make:104: recipe for target 'bin/opencv_test_highgui' failed
make[2]: *** [bin/opencv_test_highgui] Error 1
CMakeFiles/Makefile2:4937: recipe for target 'modules/highgui/CMakeFiles/opencv_test_highgui.dir/all' failed
make[1]: *** [modules/highgui/CMakeFiles/opencv_test_highgui.dir/all] Error 2
Makefile:162: recipe for target 'all' failed
make: *** [all] Error 2
提示找不到“FT_Reference_Face”，谷歌之，发现它是 freetype 库的内容。因此怀疑我的 freetype 版本较旧，于是下载 freetype-2.10.0.tar，输入以下命令安装：
# tar xf freetype-2.10.0.tar
# cd freetype-2.10.0
# mkdir build
# cd build
# ../configure --prefix=/usr/local
# make
...
# make install
然后再编译 opencv，发现一切正常了。
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