devtools: reset compilation flags for each target

Same idea than overriding PATH and PKG_CONFIG_PATH, it can be quite
useful to override compilation flags like CFLAGS, CPPFLAGS and LDFLAGS
for cross compilation or libraries that won't provide a pkg-config file.

Fixes: 272236741258 ("devtools: load target-specific compilation environment")

Signed-off-by: David Marchand <david.marchand@redhat.com>

diff --git a/devtools/test-meson-builds.sh b/devtools/test-meson-builds.sh
index 07d4298..50a3263 100755 (executable)
--- a/devtools/test-meson-builds.sh
+++ b/devtools/test-meson-builds.sh
@@ -36,12 +36,18 @@ fi
 
 default_path=$PATH
 default_pkgpath=$PKG_CONFIG_PATH
+default_cppflags=$CPPFLAGS
+default_cflags=$CFLAGS
+default_ldflags=$LDFLAGS
 
 load_env () # <target compiler>
 {
        targetcc=$1
        export PATH=$default_path
        export PKG_CONFIG_PATH=$default_pkgpath
+       export CPPFLAGS=$default_cppflags
+       export CFLAGS=$default_cflags
+       export LDFLAGS=$default_ldflags
        unset DPDK_MESON_OPTIONS
        command -v $targetcc >/dev/null 2>&1 || return 1
        DPDK_TARGET=$($targetcc -v 2>&1 | sed -n 's,^Target: ,,p')