[PATCH bpf-next] libbpf: fix non-C89 loop variable declaration in gen_loader.c

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Fix the `int i` declaration inside the for statement. This is non-C89
compliant. See [0] for user report breaking BCC build.

  [0] https://github.com/libbpf/libbpf/issues/403

Fixes: 18f4fccbf314 ("libbpf: Update gen_loader to emit BTF_KIND_FUNC relocations")
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
---
 tools/lib/bpf/gen_loader.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/lib/bpf/gen_loader.c b/tools/lib/bpf/gen_loader.c
index 502dea53a742..2e10776b6d85 100644
--- a/tools/lib/bpf/gen_loader.c
+++ b/tools/lib/bpf/gen_loader.c
@@ -584,8 +584,9 @@ void bpf_gen__record_extern(struct bpf_gen *gen, const char *name, bool is_weak,
 static struct ksym_desc *get_ksym_desc(struct bpf_gen *gen, struct ksym_relo_desc *relo)
 {
 	struct ksym_desc *kdesc;
+	int i;
 
-	for (int i = 0; i < gen->nr_ksyms; i++) {
+	for (i = 0; i < gen->nr_ksyms; i++) {
 		if (!strcmp(gen->ksyms[i].name, relo->name)) {
 			gen->ksyms[i].ref++;
 			return &gen->ksyms[i];
-- 
2.30.2




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