Let's test installing with meson as part of Travis and the
devtools/test-meson-builds.sh script.
The resulting headers and binaries make more sense to run checks
against, since they should be the same as what the final users get.

test-null.sh is now called on an installed testpmd.

The (future) ABI compatibility checks will also need to filter its report
against installed public headers.

Signed-off-by: David Marchand <david.march...@redhat.com>
Acked-by: Luca Boccassi <bl...@debian.org>
---
Changelog since v2:
- removed forced --prefix= parameter in test-meson-builds.sh to avoid
  breakage of existing environments,
- simplified install with no special verbose mode,
- removed ldd call in test-null.sh since the main user of this script
  finds this change too much for his eyes,

---
 .ci/linux-build.sh            |  6 +++++-
 devtools/test-meson-builds.sh | 21 +++++++++++----------
 2 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/.ci/linux-build.sh b/.ci/linux-build.sh
index ccc3a7ccd..e61aa2b0a 100755
--- a/.ci/linux-build.sh
+++ b/.ci/linux-build.sh
@@ -29,11 +29,15 @@ if [ "$BUILD_32BIT" = "1" ]; then
 fi
 
 OPTS="$OPTS --default-library=$DEF_LIB"
+OPTS="$OPTS --prefix=/usr -Dlibdir=lib"
 meson build --werror -Dexamples=all $OPTS
 ninja -C build
+DESTDIR=$(pwd)/install ninja -C build install
 
 if [ "$AARCH64" != "1" ]; then
-    devtools/test-null.sh
+    export LD_LIBRARY_PATH=$(pwd)/install/usr/lib
+    devtools/test-null.sh install/usr/bin/dpdk-testpmd
+    unset LD_LIBRARY_PATH
 fi
 
 if [ "$RUN_TESTS" = "1" ]; then
diff --git a/devtools/test-meson-builds.sh b/devtools/test-meson-builds.sh
index fb6c404e5..747fb4a1a 100755
--- a/devtools/test-meson-builds.sh
+++ b/devtools/test-meson-builds.sh
@@ -66,7 +66,7 @@ config () # <dir> <builddir> <meson options>
        if [ -f "$builddir/build.ninja" ] ; then
                return
        fi
-       options="--werror -Dexamples=all"
+       options="--werror -Dexamples=all -Dlibdir=lib"
        for option in $DPDK_MESON_OPTIONS ; do
                options="$options -D$option"
        done
@@ -75,7 +75,7 @@ config () # <dir> <builddir> <meson options>
        $MESON $options $dir $builddir
 }
 
-compile () # <builddir>
+compile () # <builddir> <installdir>
 {
        builddir=$1
        if [ -n "$TEST_MESON_BUILD_VERY_VERBOSE" ] ; then
@@ -90,6 +90,9 @@ compile () # <builddir>
                echo "$ninja_cmd -C $builddir"
                $ninja_cmd -C $builddir
        fi
+       rm -rf $2
+       echo "DESTDIR=$2 $ninja_cmd -C $builddir install"
+       DESTDIR=$2 $ninja_cmd -C $builddir install
 }
 
 build () # <directory> <target compiler> <meson options>
@@ -102,7 +105,8 @@ build () # <directory> <target compiler> <meson options>
        command -v ${CC##* } >/dev/null 2>&1 || return 0
        load_env $targetcc || return 0
        config $srcdir $builds_dir/$targetdir $*
-       compile $builds_dir/$targetdir
+       compile $builds_dir/$targetdir \
+               $(readlink -f $builds_dir/$targetdir/install)
 }
 
 if [ "$1" = "-vv" ] ; then
@@ -134,7 +138,7 @@ ok=$(cc -march=$default_machine -E - < /dev/null > 
/dev/null 2>&1 || echo false)
 if [ "$ok" = "false" ] ; then
        default_machine='corei7'
 fi
-build build-x86-default cc -Dlibdir=lib -Dmachine=$default_machine $use_shared
+build build-x86-default cc -Dmachine=$default_machine $use_shared
 
 c=aarch64-linux-gnu-gcc
 # generic armv8a with clang as host compiler
@@ -150,12 +154,9 @@ for f in $srcdir/config/arm/arm64_[bdo]*gcc ; do
        unset CC
 done
 
-# Test installation of the x86-default target, to be used for checking
-# the sample apps build using the pkg-config file for cflags and libs
-build_path=$(readlink -f $builds_dir/build-x86-default)
-export DESTDIR=$build_path/install-root
-$ninja_cmd -C $build_path install
-
+# Use the x86-default target, to check the sample apps build using the
+# pkg-config file for cflags and libs
+export DESTDIR=$(readlink -f $builds_dir/build-x86-default/install)
 load_env cc
 pc_file=$(find $DESTDIR -name libdpdk.pc)
 export PKG_CONFIG_PATH=$(dirname $pc_file):$PKG_CONFIG_PATH
-- 
2.23.0

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