perf probe: Don't compile CFI related code if elfutils is old

Check elfutils version, and if it is old don't compile CFI analysis code. This
allows to compile perf with old elfutils.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Tested-by: Stephane Eranian <eranian@google.com>
Reported-by: Robert Richter <robert.richter@amd.com>
Cc: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <20100510171207.26029.97604.stgit@localhost6.localdomain6>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 562b1443e785..93583eb19cd6 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -668,6 +668,7 @@ static int convert_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf)
         ret = dwarf_getlocation_addr(&fb_attr, pf->addr, &pf->fb_ops, &nops, 1);
         if (ret <= 0 || nops == 0) {
                 pf->fb_ops = NULL;
+#if _ELFUTILS_PREREQ(0, 142)
         } else if (nops == 1 && pf->fb_ops[0].atom == DW_OP_call_frame_cfa &&
                    pf->cfi != NULL) {
                 Dwarf_Frame *frame;
@@ -677,6 +678,7 @@ static int convert_probe_point(Dwarf_Die *sp_die, struct probe_finder *pf)
                                    (uintmax_t)pf->addr);
                         return -ENOENT;
                 }
+#endif
         }
 
         /* Find each argument */
@@ -956,8 +958,10 @@ int find_kprobe_trace_events(int fd, struct perf_probe_event *pev,
                 return -EBADF;
         }
 
+#if _ELFUTILS_PREREQ(0, 142)
         /* Get the call frame information from this dwarf */
         pf.cfi = dwarf_getcfi(dbg);
+#endif
 
         off = 0;
         line_list__init(&pf.lcache);
diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
index 66f1980e3855..e1f61dcd18ff 100644
--- a/tools/perf/util/probe-finder.h
+++ b/tools/perf/util/probe-finder.h
@@ -29,6 +29,7 @@ extern int find_line_range(int fd, struct line_range *lr);
 
 #include <dwarf.h>
 #include <libdw.h>
+#include <version.h>
 
 struct probe_finder {
         struct perf_probe_event *pev;           /* Target probe event */
@@ -44,7 +45,9 @@ struct probe_finder {
         struct list_head        lcache;         /* Line cache for lazy match */
 
         /* For variable searching */
+#if _ELFUTILS_PREREQ(0, 142)
         Dwarf_CFI               *cfi;           /* Call Frame Information */
+#endif
         Dwarf_Op                *fb_ops;        /* Frame base attribute */
         struct perf_probe_arg   *pvar;          /* Current target variable */
         struct kprobe_trace_arg *tvar;          /* Current result variable */