From: Simon Marchi <simon.marchi@efficios.com>
Date: Thu, 22 Feb 2024 02:23:03 +0000 (-0500)
Subject: bt2: compile `native_bt.c` with `-Wno-undef`
X-Git-Url: https://git.efficios.com/?p=babeltrace.git;a=commitdiff_plain;h=9ade9a3bbc773a70ee8e1d4eae8e712b2cdb5938

bt2: compile `native_bt.c` with `-Wno-undef`

As explained in the comment, work around a problem with SWIG 4.2.0.

Change-Id: Ia95fc1e4929591a0a16df48892b05f5e5df46be3
Signed-off-by: Simon Marchi <simon.marchi@efficios.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/11849
Tested-by: jenkins <jenkins@lttng.org>
Reviewed-by: Michael Jeanson <mjeanson@efficios.com>
---

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" \