BTF_KIND_TAG is present in libbtf 6.0 but not libbtf in 5.15rc4. Make
the code requiring it conditionally compiled in.
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
btf_encoder.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/btf_encoder.c b/btf_encoder.c
index c341f95..5e523f1 100644
--- a/btf_encoder.c
+++ b/btf_encoder.c
@@ -31,6 +31,15 @@
#include <errno.h>
#include <stdint.h>
+#ifndef LIBBPF_MINOR_VERSION
+/*
+ * The libbpf version is not defined in older versions, workaround by assuming
+ * version 0.5.
+ */
+#define LIBBPF_MAJOR_VERSION 0
+#define LIBBPF_MINOR_VERSION 5
+#endif
+
struct elf_function {
const char *name;
bool generated;
@@ -141,7 +150,9 @@ static const char * const btf_kind_str[NR_BTF_KINDS] = {
[BTF_KIND_VAR] = "VAR",
[BTF_KIND_DATASEC] = "DATASEC",
[BTF_KIND_FLOAT] = "FLOAT",
+#if LIBBPF_MAJOR_VERSION > 0 || LIBBPF_MINOR_VERSION > 5
[BTF_KIND_TAG] = "TAG",
+#endif
};
static const char *btf__printable_name(const struct btf *btf, uint32_t offset)
@@ -648,6 +659,7 @@ static int32_t btf_encoder__add_datasec(struct btf_encoder *encoder, const char
static int32_t btf_encoder__add_tag(struct btf_encoder *encoder, const char *value, uint32_t type,
int component_idx)
{
+#if LIBBPF_MAJOR_VERSION > 0 || LIBBPF_MINOR_VERSION > 5
struct btf *btf = encoder->btf;
const struct btf_type *t;
int32_t id;
@@ -663,6 +675,10 @@ static int32_t btf_encoder__add_tag(struct btf_encoder *encoder, const char *val
}
return id;
+#else
+ fprintf(stderr, "error: unable to encode BTF_KIND_TAG due to old libbtf\n");
+ return -ENOTSUP;
+#endif
}
/*
--
2.33.0.1079.g6e70778dc9-goog
