From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnaldo Carvalho de Melo Subject: [PATCH 16/41] perf tests: Fix compile when libunwind's unwind.h is available Date: Tue, 12 Sep 2017 12:10:04 -0300 Message-ID: <20170912151029.6612-17-acme@kernel.org> References: <20170912151029.6612-1-acme@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20170912151029.6612-1-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Milian Wolff , David Ahern , Jiri Olsa , Namhyung Kim , Peter Zijlstra , Yao Jin , Arnaldo Carvalho de Melo List-Id: linux-perf-users.vger.kernel.org From: Milian Wolff When cross compiling perf and I want to link against a self-compiled libunwind, I usually make the custom path where the libunwind headers exist visible by adding the libunwind prefix to the include path when compiling perf, i.e.: ~~~~~ $ ls $HOME/projects/compiled/other/include/ libunwind-coredump.h libunwind.h libunwind-x86_64.h libunwind-common.h libunwind-dynamic.h libunwind-ptrace.h unwind.h $ make EXTRA_CFLAGS="-I$HOME/projects/compiled/other/include/ ~~~~~~ Note the `unwind.h` header from libunwind which leads to compile errors when compiling tests/dwarf-unwind.c, since it shadows perf's util/unwind.h: ~~~~~ tests/dwarf-unwind.c:41:32: error: ‘struct unwind_entry’ declared inside parameter list will not be visible outside of this definition or declaration [-Werror] static int unwind_entry(struct unwind_entry *entry, void *arg) ^~~~~~~~~~~~ tests/dwarf-unwind.c: In function ‘unwind_entry’: tests/dwarf-unwind.c:44:22: error: dereferencing pointer to incomplete type ‘struct unwind_entry’ char *symbol = entry->sym ? entry->sym->name : NULL; ^~ tests/dwarf-unwind.c: In function ‘unwind_thread’: tests/dwarf-unwind.c:92:8: error: implicit declaration of function ‘unwind__get_entries’; did you mean ‘unwind_entry’? [-Werror=implicit-function-declaration] err = unwind__get_entries(unwind_entry, &cnt, thread, ^~~~~~~~~~~~~~~~~~~ unwind_entry tests/dwarf-unwind.c:92:8: error: nested extern declaration of ‘unwind__get_entries’ [-Werror=nested-externs] ~~~~~~ Fix this compile error by specificing an explicit include of perf's unwind.h in the util folder. Signed-off-by: Milian Wolff Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Yao Jin Link: http://lkml.kernel.org/r/20170906150209.12579-1-milian.wolff@kdab.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/tests/dwarf-unwind.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/tests/dwarf-unwind.c b/tools/perf/tests/dwarf-unwind.c index 2a7b9b47bbcb..9ba1d216a89f 100644 --- a/tools/perf/tests/dwarf-unwind.c +++ b/tools/perf/tests/dwarf-unwind.c @@ -6,7 +6,7 @@ #include "debug.h" #include "machine.h" #include "event.h" -#include "unwind.h" +#include "../util/unwind.h" #include "perf_regs.h" #include "map.h" #include "thread.h" -- 2.13.5