[PATCH v2] ci: check C++ headers with clang

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

If not passing an explicit compiler for C++, meson uses c++ which
defaults to /usr/bin/g++ on a Ubuntu system.
Explicitly choose which compiler to use for C++.

Signed-off-by: David Marchand <david.marchand@redhat.com>
---
Changes since v1:
- rebased,
- moved CXX tweaking in the branch enabling headers check,

---
 .ci/linux-build.sh | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/.ci/linux-build.sh b/.ci/linux-build.sh
index e9272d3931..5c4bfa75c3 100755
--- a/.ci/linux-build.sh
+++ b/.ci/linux-build.sh
@@ -102,9 +102,14 @@ OPTS="$OPTS -Dplatform=generic"
 OPTS="$OPTS -Ddefault_library=$DEF_LIB"
 OPTS="$OPTS -Dbuildtype=$buildtype"
 if [ "$STDATOMIC" = "true" ]; then
-	OPTS="$OPTS -Denable_stdatomic=true"
+    OPTS="$OPTS -Denable_stdatomic=true"
 else
-	OPTS="$OPTS -Dcheck_includes=true"
+    OPTS="$OPTS -Dcheck_includes=true"
+    if [ "${CC%%clang}" != "$CC" ]; then
+        export CXX=clang++
+    else
+        export CXX=g++
+    fi
 fi
 if [ "$MINI" = "true" ]; then
     OPTS="$OPTS -Denable_drivers=net/null"
-- 
2.50.0