Bug#910963: x265 FTBFS on !x86: undefined references to x265*::detect512()

[Adrian Bunk]

Source: x265
Version: 2.9-2
Severity: serious
Tags: ftbfs

https://buildd.debian.org/status/package.php?p=x265&suite=sid

...
[100%] Linking CXX executable x265
/usr/bin/cmake -E cmake_link_script CMakeFiles/cli.dir/link.txt --verbose=1
/usr/bin/c++  -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2  -Wl,-z,relro -Wl,-z,now -Wl,--as-needed -L/<<PKGBUILDDIR>>/x265-10bit -L/<<PKGBUILDDIR>>/x265-12bit -rdynamic -Wl,-Bsymbolic,-znoexecstack CMakeFiles/cli.dir/input/input.cpp.o CMakeFiles/cli.dir/input/y4m.cpp.o CMakeFiles/cli.dir/input/yuv.cpp.o CMakeFiles/cli.dir/output/output.cpp.o CMakeFiles/cli.dir/output/raw.cpp.o CMakeFiles/cli.dir/output/reconplay.cpp.o CMakeFiles/cli.dir/output/y4m.cpp.o CMakeFiles/cli.dir/output/yuv.cpp.o CMakeFiles/cli.dir/x265.cpp.o  -o x265 -Wl,-rpath,/<<PKGBUILDDIR>>/x265-8bit: libx265.so.165 -lpthread -lrt -ldl -lnuma -Wl,-Bstatic -lx265_main10 -lx265_main12 -Wl,-Bdynamic -lpthread -lrt -ldl -lnuma 
/usr/bin/ld: libx265.so.165: undefined reference to `x265_12bit::detect512()'
/usr/bin/ld: libx265.so.165: undefined reference to `x265_10bit::detect512()'
/usr/bin/ld: libx265.so.165: undefined reference to `x265::detect512()'
collect2: error: ld returned 1 exit status
make[4]: *** [CMakeFiles/cli.dir/build.make:208: x265] Error 1