Re: [dpdk-dev] [PATCH v8 4/5] ci: add aarch64 -> aarch32 cross compiling jobs

["Juraj Linkeš" <juraj.linkes@pantheon.tech>]

> -----Original Message-----
> From: Aaron Conole <aconole@redhat.com>
> Sent: Tuesday, August 25, 2020 4:16 PM
> To: Juraj Linkeš <juraj.linkes@pantheon.tech>
> Cc: bruce.richardson@intel.com; maicolgabriel@hotmail.com; dev@dpdk.org
> Subject: Re: [PATCH v8 4/5] ci: add aarch64 -> aarch32 cross compiling jobs
> 
> Juraj Linkeš <juraj.linkes@pantheon.tech> writes:
> 
> > Add two jobs (static and shared libs), both building on aarch64 and
> > producing 32-bit arm binaries executable on armv8-a, but not armv7.
> > Do not run tests in these jobs.
> >
> > Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
> > ---
> >  .ci/linux-build.sh |  7 ++++++-
> >  .travis.yml        | 19 +++++++++++++++++++
> >  2 files changed, 25 insertions(+), 1 deletion(-)
> >
> > diff --git a/.ci/linux-build.sh b/.ci/linux-build.sh index
> > d079801d7..c042b065c 100755
> > --- a/.ci/linux-build.sh
> > +++ b/.ci/linux-build.sh
> > @@ -33,6 +33,11 @@ if [ "$AARCH64" = "1" ]; then
> >      OPTS="$OPTS --cross-file config/arm/arm64_armv8_linux_gcc"
> >  fi
> >
> > +if [ "$AARCH32" = "1" ]; then
> > +    # convert the arch specifier
> > +    OPTS="$OPTS --cross-file config/arm/arm32_armv8a_linux_gcc"
> > +fi
> > +
> >  if [ "$BUILD_DOCS" = "1" ]; then
> >      OPTS="$OPTS -Denable_docs=true"
> >  fi
> > @@ -53,7 +58,7 @@ OPTS="$OPTS --buildtype=debugoptimized"
> >  meson build --werror $OPTS
> >  ninja -C build
> >
> > -if [ "$AARCH64" != "1" ]; then
> > +if file build/app/dpdk-testpmd | sed 's/-/_/g' | grep -q "$(uname
> > +-m)"; then
> 
> I'm not sure about this.  This will degrade the 32-bit x86 build, since it will no
> longer execute the test-null.sh script.
> 
> Maybe we should re-use that flag for this series.  BUILD_32BIT ??
> 

So this omits running test-null.sh with 32-bit builds on 64bit systems and we want to run that? Then it's probably the easiest to just disable the check for x86_64 -> aarch64 and x86_64 -> aarch32 builds. I wanted something more elegant here but it's a bit more complicated.

> >      devtools/test-null.sh
> >  fi
> >
> > diff --git a/.travis.yml b/.travis.yml index d6eeab371..850faaac1
> > 100644
> > --- a/.travis.yml
> > +++ b/.travis.yml
> > @@ -18,6 +18,10 @@ _aarch64_packages: &aarch64_packages
> >    - *required_packages
> >    - [gcc-aarch64-linux-gnu, libc6-dev-arm64-cross,
> > pkg-config-aarch64-linux-gnu]
> >
> > +_arm_32b_packages: &arm_32b_packages
> > +  - *required_packages
> > +  - [gcc-arm-linux-gnueabihf, libc6-dev-armhf-cross,
> > +pkg-config-arm-linux-gnueabihf]
> > +
> >  _build_32b_packages: &build_32b_packages
> >    - *required_packages
> >    - [gcc-multilib]
> > @@ -98,6 +102,21 @@ jobs:
> >          packages:
> >            - *required_packages
> >            - *doc_packages
> > +  # aarch64 cross-compiling aarch32 jobs
> > +  - env: DEF_LIB="shared" AARCH32=1
> > +    arch: arm64
> > +    compiler: gcc
> > +    addons:
> > +      apt:
> > +        packages:
> > +          - *arm_32b_packages
> > +  - env: DEF_LIB="static" AARCH32=1
> > +    arch: arm64
> > +    compiler: gcc
> > +    addons:
> > +      apt:
> > +        packages:
> > +          - *arm_32b_packages
> >    # aarch64 clang jobs
> >    - env: DEF_LIB="static"
> >      arch: arm64
>