X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=src%2Fbindings%2Fpython%2Fbt2%2FMakefile.am;h=77b3bec5d48af470a452216194ed07229db31b5d;hb=9ade9a3bbc773a70ee8e1d4eae8e712b2cdb5938;hp=7d58b7324f13905ff37fa246dbb06abce0164092;hpb=a1ac73cff6a4235ffc4c231133722888e24ed93b;p=babeltrace.git

diff --git a/src/bindings/python/bt2/Makefile.am b/src/bindings/python/bt2/Makefile.am
index 7d58b732..77b3bec5 100644
--- a/src/bindings/python/bt2/Makefile.am
+++ b/src/bindings/python/bt2/Makefile.am
@@ -127,6 +127,14 @@ WARN_CFLAGS += -Wno-redundant-decls
 WARN_CFLAGS += -Wno-missing-field-initializers
 WARN_CFLAGS += -Wno-unused-parameter
 
+# SWIG 4.2.0 generates:
+#
+#   #if __cplusplus >=201103L
+#
+# ... leading to some `-Wundef` warnings when building the extension as C, where
+# `__cplusplus` is not defined.
+WARN_CFLAGS += -Wno-undef
+
 BUILD_FLAGS=CC="$(CC)" \
 		CFLAGS="$(GLIB_CFLAGS) $(AM_CFLAGS) $(CFLAGS) $(WARN_CFLAGS)" \
 		CPPFLAGS="$(AM_CPPFLAGS) $(CPPFLAGS) -I$(srcdir)/bt2" \