+2020-02-13 Simon Marchi <simon.marchi@efficios.com>
+
+ * Makefile.am: Rename source files from .c to .cc.
+ (CC, CFLAGS): Don't override.
+ (AM_CFLAGS): Rename to ...
+ (AM_CXXFLAGS): ... this.
+ * Makefile.in: Re-generate.
+ * %.c: Rename to %.cc.
+