perf tools: Check libunwind for availability of dwarf parsing feature
The newly added dwarf unwinding feature [1] requires: . a recent version (>= 1.1) of libunwind, . libunwind to be configured with --enable-debug-frame. [1] http://www.spinics.net/lists/kernel/msg1598951.html Add the corresponding API tests in the feature check list. Acked-by: Jiri Olsa <jolsa@redhat.com> Signed-off-by: Jean Pihet <jean.pihet@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
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@ -226,9 +226,13 @@ endif
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FLAGS_UNWIND=$(LIBUNWIND_CFLAGS) $(CFLAGS) $(LIBUNWIND_LDFLAGS) $(LDFLAGS) $(EXTLIBS) $(LIBUNWIND_LIBS)
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FLAGS_UNWIND=$(LIBUNWIND_CFLAGS) $(CFLAGS) $(LIBUNWIND_LDFLAGS) $(LDFLAGS) $(EXTLIBS) $(LIBUNWIND_LIBS)
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ifneq ($(call try-cc,$(SOURCE_LIBUNWIND),$(FLAGS_UNWIND),libunwind),y)
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ifneq ($(call try-cc,$(SOURCE_LIBUNWIND),$(FLAGS_UNWIND),libunwind),y)
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msg := $(warning No libunwind found, disabling post unwind support. Please install libunwind-dev[el] >= 0.99);
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msg := $(warning No libunwind found, disabling post unwind support. Please install libunwind-dev[el] >= 1.1);
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NO_LIBUNWIND := 1
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NO_LIBUNWIND := 1
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endif # Libunwind support
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endif # Libunwind support
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ifneq ($(call try-cc,$(SOURCE_LIBUNWIND_DEBUG_FRAME),$(FLAGS_UNWIND),libunwind debug_frame),y)
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msg := $(warning No debug_frame support found in libunwind);
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CFLAGS += -DNO_LIBUNWIND_DEBUG_FRAME
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endif # debug_frame support in libunwind
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endif # NO_LIBUNWIND
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endif # NO_LIBUNWIND
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ifndef NO_LIBUNWIND
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ifndef NO_LIBUNWIND
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@ -185,7 +185,6 @@ extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
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unw_proc_info_t *pi,
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unw_proc_info_t *pi,
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int need_unwind_info, void *arg);
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int need_unwind_info, void *arg);
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#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
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#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)
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int main(void)
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int main(void)
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@ -197,6 +196,26 @@ int main(void)
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return 0;
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return 0;
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}
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}
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endef
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endef
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define SOURCE_LIBUNWIND_DEBUG_FRAME
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#include <libunwind.h>
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#include <stdlib.h>
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extern int
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UNW_OBJ(dwarf_find_debug_frame) (int found, unw_dyn_info_t *di_debug,
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unw_word_t ip, unw_word_t segbase,
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const char *obj_name, unw_word_t start,
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unw_word_t end);
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#define dwarf_find_debug_frame UNW_OBJ(dwarf_find_debug_frame)
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int main(void)
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{
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dwarf_find_debug_frame(0, NULL, 0, 0, NULL, 0, 0);
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return 0;
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}
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endef
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endif
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endif
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ifndef NO_BACKTRACE
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ifndef NO_BACKTRACE
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