[PATCH 4/4] ci: build examples externally

[David Marchand <david.marchand@redhat.com>]

Enhance our CI coverage by building examples against an installed DPDK.

Signed-off-by: David Marchand <david.marchand@redhat.com>
---
 .ci/linux-build.sh          | 25 ++++++++++++++++++++++++-
 .github/workflows/build.yml |  6 +++---
 2 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/.ci/linux-build.sh b/.ci/linux-build.sh
index 9631e342b5..1b1f9d07f3 100755
--- a/.ci/linux-build.sh
+++ b/.ci/linux-build.sh
@@ -1,7 +1,7 @@
 #!/bin/sh -xe
 
 if [ -z "${DEF_LIB:-}" ]; then
-    DEF_LIB=static ABI_CHECKS= BUILD_DOCS= RUN_TESTS= $0
+    DEF_LIB=static ABI_CHECKS= BUILD_DOCS= BUILD_EXAMPLES= RUN_TESTS= $0
     DEF_LIB=shared $0
     exit
 fi
@@ -99,6 +99,7 @@ if [ "$MINI" = "true" ]; then
 else
     OPTS="$OPTS -Ddisable_libs="
 fi
+OPTS="$OPTS -Dlibdir=lib"
 
 if [ "$ASAN" = "true" ]; then
     OPTS="$OPTS -Db_sanitize=address"
@@ -168,3 +169,25 @@ if [ "$RUN_TESTS" = "true" ]; then
     catch_coredump
     [ "$failed" != "true" ]
 fi
+
+# Test examples compilation with an installed dpdk
+if [ "$BUILD_EXAMPLES" = "true" ]; then
+    [ -d install ] || DESTDIR=$(pwd)/install ninja -C build install
+    export LD_LIBRARY_PATH=$(dirname $(find $(pwd)/install -name librte_eal.so)):$LD_LIBRARY_PATH
+    export PKG_CONFIG_PATH=$(dirname $(find $(pwd)/install -name libdpdk.pc)):$PKG_CONFIG_PATH
+    export PKGCONF="pkg-config --define-prefix"
+    ninja -C build -t targets all | grep 'examples/.*:.*c_LINKER' |
+    while read target; do
+        target=${target%%:*}
+        target=${target#examples/dpdk-}
+        if [ -e examples/$target/Makefile ]; then
+            echo $target
+            continue
+        fi
+        find examples -name Makefile |
+        sed -ne "s,examples/\([^/]*\)\(/.*\|\)/$target/Makefile,\1,p"
+    done | sort -u |
+    while read example; do
+        make -C install/usr/local/share/dpdk/examples/$example clean shared
+    done
+fi
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 3b629fcdbd..414dd089e0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,6 +20,7 @@ jobs:
       BUILD_32BIT: ${{ matrix.config.cross == 'i386' }}
       BUILD_DEBUG: ${{ contains(matrix.config.checks, 'debug') }}
       BUILD_DOCS: ${{ contains(matrix.config.checks, 'doc') }}
+      BUILD_EXAMPLES: ${{ contains(matrix.config.checks, 'examples') }}
       CC: ccache ${{ matrix.config.compiler }}
       DEF_LIB: ${{ matrix.config.library }}
       LIBABIGAIL_VERSION: libabigail-2.1
@@ -39,7 +40,7 @@ jobs:
             mini: mini
           - os: ubuntu-20.04
             compiler: gcc
-            checks: abi+debug+doc+tests
+            checks: abi+debug+doc+examples+tests
           - os: ubuntu-20.04
             compiler: clang
             checks: asan+doc+tests
@@ -96,12 +97,11 @@ jobs:
     - name: Install packages
       run: sudo apt install -y ccache libarchive-dev libbsd-dev libfdt-dev
         libibverbs-dev libjansson-dev libnuma-dev libpcap-dev libssl-dev
-        ninja-build python3-pip python3-pyelftools python3-setuptools
+        ninja-build pkg-config python3-pip python3-pyelftools python3-setuptools
         python3-wheel zlib1g-dev
     - name: Install libabigail build dependencies if no cache is available
       if: env.ABI_CHECKS == 'true' && steps.libabigail-cache.outputs.cache-hit != 'true'
       run: sudo apt install -y autoconf automake libdw-dev libtool libxml2-dev
-        pkg-config
     - name: Install i386 cross compiling packages
       if: env.BUILD_32BIT == 'true'
       run: sudo apt install -y gcc-multilib g++-multilib
-- 
2.40.1