Ubuntu 20.04 gcc does not define HWCAP2_SVE2 #180

[markos]

Gcc on Ubuntu 20.04 does not define HWCAP2 defines, incl. HWCAP2_SVE2.
We suggest this patch to enable integration of Vectorscan on Envoyproxy on non-x86 platforms:

envoyproxy/envoy#29881

[sambercovici]

tested with clan 10 and gcc 9.4.0

cmake --version
cmake version 3.27.7

git checkout bugfix/fix-compilation-arm-ubuntu-20.04

3. sqlite detection fails
   cmake --fresh .. -DBOOST_ROOT=/home/ubuntu/boost_1_57_0 -DCMAKE_BUILD_TYPE=Release
   fails:
   CMake Error at cmake/sqlite3.cmake:24 (list):
   list sub-command INSERT requires at least three arguments.
   Call Stack (most recent call first):
   tools/hsbench/CMakeLists.txt:1 (include)

commented line 24 in cmake/sqlite3.cmake

cmake --fresh .. -DBOOST_ROOT=/home/ubuntu/boost_1_57_0 -DCMAKE_BUILD_TYPE=Release

make hs_runtime
OK

[markos]

hm, I see the problem, it tries to use pkg-config to find the sqlite variables and fails. Could you try installing pkg-config and libsqlite3-dev and retry? I'll fix it in a new commit, but I think that should do it.

[sambercovici]

this worked

[sambercovici]

Hi @markos,
Anything else?
Is there an ETA for the next release that will build on Ubuntu 20.04?

[markos]

@sambercovici I'm working on fixing an SVE2-related segfault right now, the next release should hopefully be done by the end of this month.

[sambercovici]

Hi @markos is this till on track?

[markos]

@sambercovici the release will be done by the end of the month, yes. this will go in.

[markos]

The sqlite fix will go in a different PR