Competing pto-isa versions

[fiskrt]

When compiling a kernel, bisheng sees two pto-isa includes:

1. ASCEND_HOME_PATH/include/pto/common which comes with the CANN installation,

2. and our local cmake pto-isa version defined in the cmake through FetchContent.

pto-kernels/CMakeLists.txt

Lines 149 to 154 in 989e0eb

	FetchContent_Declare(
	libpto_isa_headers
	GIT_REPOSITORY https://gitcode.com/cann/pto-isa.git
	GIT_TAG v9.0.0)
	FetchContent_Populate(libpto_isa_headers)

It's not really possible to avoid the first one completely, even if we set the -I to ours first.

Because bisheng --asc-aicore-lang mode hardcodes /usr/local/Ascend/cann-9.0.0/aarch64-linux/include as include path. So it never sees our local pto-isa.

Reproduce

printf '' > /tmp/empty_probe.cpp
# compile the kernel with -I includes pointing to our local pto-isa
/usr/local/Ascend/cann-9.0.0/bin/bisheng -DMEMORY_BASE -Dno_workspace_kernel_EXPORTS -I/mounted_home/pto-kernels/build/cp311-cp311-linux_aarch64/_deps/libpto_isa_headers-src/include/pto/common -I/mounted_home/pto-kernels/build/cp311-cp311-linux_aarch64/_deps/libpto_isa_headers-src/include -I/include -I/usr/local/Ascend/driver/kernel/inc -fPIC -O0 -g -D_FORTIFY_SOURCE=2 -O2 -std=c++17 -Wno-macro-redefined -Wno-ignored-attributes -fstack-protector-strong --npu-arch=dav-2201 -H -o /tmp/kfa_probe.o -c --asc-aicore-lang /mounted_home/pto-kernels/csrc/kernel/kernel_fa.cpp 2>&1 | grep -nE 'TPush\.hpp|pto_instr_impl\.hpp|pto-inst\.hpp' | head -40
# see how the include paths are 1:. /usr/local/Ascend/cann-9.0.0/aarch64-linux/include/pto/pto-inst.hpp

# now rename the CANN pto so it can't be found by bisheng
mv /usr/local/Ascend/cann-9.0.0/aarch64-linux/include/pto/ /usr/local/Ascend/cann-9.0.0/aarch64-linux/include/pto2/

# re-run compilation, and we see the pto-isa path points to ours
/usr/local/Ascend/cann-9.0.0/bin/bisheng -DMEMORY_BASE -Dno_workspace_kernel_EXPORTS -I/mounted_home/pto-kernels/build/cp311-cp311-linux_aarch64/_deps/libpto_isa_headers-src/include/pto/common -I/mounted_home/pto-kernels/build/cp311-cp311-linux_aarch64/_deps/libpto_isa_headers-src/include -I/include -I/usr/local/Ascend/driver/kernel/inc -fPIC -O0 -g -D_FORTIFY_SOURCE=2 -O2 -std=c++17 -Wno-macro-redefined -Wno-ignored-attributes -fstack-protector-strong --npu-arch=dav-2201 -H -o /tmp/kfa_probe.o -c --asc-aicore-lang /mounted_home/pto-kernels/csrc/kernel/kernel_fa.cpp 2>&1 | grep -nE 'TPush\.hpp|pto_instr_impl\.hpp|pto-inst\.hpp' | head -40
# 1:. /mounted_home/pto-kernels/build/cp311-cp311-linux_aarch64/_deps/libpto_isa_headers-src/include/pto/pto-inst.hpp