dnsdist: Do NOT add `c++` flags to `CPPFLAGS`

Signed-off-by: Remi Gacogne <remi.gacogne@powerdns.com>

diff --git a/pdns/dnsdistdist/Makefile.am b/pdns/dnsdistdist/Makefile.am
index 0d04dd216043a23d051c017fb934849a82fb8b2e..b33817f79d188523a59599c53438ca0c20d9cc60 100644 (file)
--- a/pdns/dnsdistdist/Makefile.am
+++ b/pdns/dnsdistdist/Makefile.am
@@ -14,6 +14,7 @@ AM_CPPFLAGS += $(SYSTEMD_CFLAGS) \
        -I$(top_srcdir)/dnsdist-rust-lib/rust/src \
        -DSYSCONFDIR=\"${sysconfdir}\" \
        -DBOOST_CONTAINER_USE_STD_EXCEPTIONS
+AM_CXXFLAGS =
 
 DNSDIST_RUST_LIBS = $(top_builddir)/dnsdist-rust-lib/rust/libdnsdist_rust.a $(LIBDL)
 
@@ -80,7 +81,7 @@ min_js: $(MIN_JS_FILES)
 if HAVE_RE2
 # Some versions of pkg_config add -std=c11++, override that
 AM_CPPFLAGS += $(RE2_CFLAGS)
-AM_CPPFLAGS += -std=c++17
+AM_CXXFLAGS += -std=c++17
 endif
 
 if HAVE_DNS_OVER_TLS