Fix ebpf_base.h usability in C

Signed-off-by: Dave Thaler <[email protected]>

src/ebpf_base.h

@@ -40,11 +40,11 @@ typedef struct _ebpf_context_descriptor {
 
 // Maximum number of nested function calls allowed in eBPF programs.
 // This limit helps prevent stack overflow and ensures predictable behavior.
-constexpr int MAX_CALL_STACK_FRAMES = 8;
+#define MAX_CALL_STACK_FRAMES 8
 
 // Stack space allocated for each subprogram (in bytes).
 // This ensures each function call has its own dedicated stack space.
-constexpr int EBPF_SUBPROGRAM_STACK_SIZE = 512;
+#define EBPF_SUBPROGRAM_STACK_SIZE 512
 
 // Total stack space usable with nested subprogram calls.
-constexpr int EBPF_TOTAL_STACK_SIZE = MAX_CALL_STACK_FRAMES * EBPF_SUBPROGRAM_STACK_SIZE;
+#define EBPF_TOTAL_STACK_SIZE (MAX_CALL_STACK_FRAMES * EBPF_SUBPROGRAM_STACK_SIZE)