Support torch 2.1.0

[lifeiteng]

@csukuangfj can you upload new version wheels at https://csukuangfj.github.io/k2/installation/pre-compiled-cpu-wheels-linux/index.html

[lifeiteng]

--- a/k2/torch/bin/CMakeLists.txt
+++ b/k2/torch/bin/CMakeLists.txt
@@ -15,7 +15,7 @@ if(NOT K2_WITH_CUDA)
   transform(OUTPUT_VARIABLE ctc_decode_srcs SRCS ${ctc_decode_srcs})
 endif()
 add_executable(ctc_decode ${ctc_decode_srcs})
-set_property(TARGET ctc_decode PROPERTY CXX_STANDARD 14)
+set_property(TARGET ctc_decode PROPERTY CXX_STANDARD 17)
 target_link_libraries(ctc_decode ${bin_dep_libs})

 #----------------------------------------
@@ -26,7 +26,7 @@ if(NOT K2_WITH_CUDA)
   transform(OUTPUT_VARIABLE hlg_decode_srcs SRCS ${hlg_decode_srcs})
 endif()
 add_executable(hlg_decode ${hlg_decode_srcs})
-set_property(TARGET hlg_decode PROPERTY CXX_STANDARD 14)
+set_property(TARGET hlg_decode PROPERTY CXX_STANDARD 17)
 target_link_libraries(hlg_decode ${bin_dep_libs})

...

[csukuangfj]

@csukuangfj can you upload new version wheels at https://csukuangfj.github.io/k2/installation/pre-compiled-cpu-wheels-linux/index.html

@lifeiteng

I have updated

• https://k2-fsa.github.io/k2/cuda.html
• https://k2-fsa.github.io/k2/cpu.html

to include pre-compiled k2 wheels for torch 2.1

Please recheck it.