[PATCH v5] build: prevent accidentally building without NUMA support

[Bruce Richardson <bruce.richardson@intel.com>]

When libnuma development package is missing on a system, DPDK can still
be built but will be missing much-needed support for NUMA memory
management. This may later cause issues at runtime if the resulting
binary is run on a NUMA system.

We can reduce the incidence of such runtime errors by ensuring that, for
native builds*, libnuma is present - unless the user actually specifies
via "max_numa_nodes" that they don't require NUMA support. Having this
as an error condition is also in keeping with what is documented in the
Linux GSG doc, where libnuma is listed as a requirement for building
DPDK [1].

* NOTE: cross-compilation builds have a different logic set, with a
  separate "numa" value indicating if numa support is necessary.

[1] https://doc.dpdk.org/guides-23.03/linux_gsg/sys_reqs.html

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Signed-off-by: David Marchand <david.marchand@redhat.com>

---
V5: Rebase on main, since dependencies merged

V4: Add Depends-on tag so CI picks up dependency

V3:
- install 32-bit libnuma packages on CI systems [thanks to David
  for the changes]
- split the patch out of the previous patchset, so it can be tracked
  separately from the more minor fixup changes.

V2: Limit check to linux only
---
 .github/workflows/build.yml | 5 ++++-
 config/meson.build          | 9 +++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3b629fcdbd..a479783bbc 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -91,6 +91,9 @@ jobs:
       with:
         path: reference
         key: ${{ steps.get_ref_keys.outputs.abi }}
+    - name: Configure i386 architecture
+      if: env.BUILD_32BIT == 'true'
+      run: sudo dpkg --add-architecture i386
     - name: Update APT cache
       run: sudo apt update || true
     - name: Install packages
@@ -104,7 +107,7 @@ jobs:
         pkg-config
     - name: Install i386 cross compiling packages
       if: env.BUILD_32BIT == 'true'
-      run: sudo apt install -y gcc-multilib g++-multilib
+      run: sudo apt install -y gcc-multilib g++-multilib libnuma-dev:i386
     - name: Install aarch64 cross compiling packages
       if: env.AARCH64 == 'true'
       run: sudo apt install -y crossbuild-essential-arm64
diff --git a/config/meson.build b/config/meson.build
index 22d7d908b7..d8223718e4 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -381,6 +381,15 @@ endif
 if not dpdk_conf.has('RTE_MAX_NUMA_NODES')
     error('Number of NUMA nodes not specified.')
 endif
+if (is_linux and
+        dpdk_conf.get('RTE_MAX_NUMA_NODES') > 1 and
+        not meson.is_cross_build() and
+        not has_libnuma)
+    error('''
+No NUMA library (development package) found, yet DPDK configured for multiple NUMA nodes.
+Please install libnuma, or set 'max_numa_nodes' option to '1' to build without NUMA support.
+''')
+endif
 
 # set the install path for the drivers
 dpdk_conf.set_quoted('RTE_EAL_PMD_PATH', eal_pmd_path)
-- 
2.39.2