From: Steven Rostedt <rostedt@goodmis.org>
To: Brahmajit Das <brahmajit.xyz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org, Yordan Karadzhov <y.karadz@gmail.com>
Subject: Re: [PATCH 1/1] Fix incompatible function pointer types assigning to stream_find_id_func
Date: Tue, 10 Oct 2023 18:34:52 -0400 [thread overview]
Message-ID: <20231010183452.3ec7ac71@gandalf.local.home> (raw)
In-Reply-To: <20231010192738.166989-1-brahmajit.xyz@gmail.com>
Yordan,
Not sure if you are following linux-trace-devel, but this is a kernelshark
patch.
-- Steve
On Tue, 10 Oct 2023 19:26:33 +0000
Brahmajit Das <brahmajit.xyz@gmail.com> wrote:
> Newer compilers such as Clang 16 and GCC 14 enables certain errors by
> default, -Werror=incompatible-function-pointer-types being one of them
> (-Werror=incompatible-pointer-types is the equivalent in GCC). This
> resutls in build errors such as
>
> error: incompatible function pointer types assigning to 'stream_find_id_func' (aka 'int (*)(struct kshark_data_stream *, const char *)') from 'const int (struct kshark_data_stream *, const char *)' [-Wincompatible-function-pointer-types]
> 1204 | interface->find_event_id = tepdata_find_event_id;
> | ^ ~~~~~~~~~~~~~~~~~~~~~
>
> My patch is not the best fix/a proper fix but for now silences the error
> and lets me build kernelshark with clang.
>
> I've also added some other misc. fixes that helps building kernelshark
> on musl libc.
>
> Bug: https://bugs.gentoo.org/895838
> Signed-off-by: Brahmajit Das <brahmajit.xyz@gmail.com>
> ---
> src/kernelshark.cpp | 1 +
> src/libkshark-tepdata.c | 6 +++---
> src/libkshark.h | 1 +
> src/plugins/sched_events.c | 1 +
> 4 files changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/src/kernelshark.cpp b/src/kernelshark.cpp
> index 1ad15f4..d795492 100644
> --- a/src/kernelshark.cpp
> +++ b/src/kernelshark.cpp
> @@ -7,6 +7,7 @@
> // C
> #include <sys/stat.h>
> #include <getopt.h>
> +#include <libgen.h>
>
> // Qt
> #include <QApplication>
> diff --git a/src/libkshark-tepdata.c b/src/libkshark-tepdata.c
> index b780957..236a858 100644
> --- a/src/libkshark-tepdata.c
> +++ b/src/libkshark-tepdata.c
> @@ -1201,13 +1201,13 @@ static void kshark_tep_init_methods(struct kshark_generic_stream_interface *inte
> interface->get_event_name = tepdata_get_event_name;
> interface->aux_info= tepdata_get_latency;
> interface->get_info = tepdata_get_info;
> - interface->find_event_id = tepdata_find_event_id;
> + interface->find_event_id = (stream_find_id_func) tepdata_find_event_id;
> interface->get_all_event_ids = tepdata_get_event_ids;
> interface->dump_entry = tepdata_dump_entry;
> interface->get_all_event_field_names = tepdata_get_field_names;
> interface->get_event_field_type = tepdata_get_field_type;
> - interface->read_record_field_int64 = tepdata_read_record_field;
> - interface->read_event_field_int64 = tepdata_read_event_field;
> + interface->read_record_field_int64 = (stream_read_record_field)tepdata_read_record_field;
> + interface->read_event_field_int64 = (stream_read_event_field) tepdata_read_event_field;
> interface->load_entries = tepdata_load_entries;
> interface->load_matrix = tepdata_load_matrix;
> }
> diff --git a/src/libkshark.h b/src/libkshark.h
> index 1514f33..c477c70 100644
> --- a/src/libkshark.h
> +++ b/src/libkshark.h
> @@ -17,6 +17,7 @@
> #include <string.h>
> #include <pthread.h>
> #include <errno.h>
> +#include <sys/types.h>
>
> // Json-C
> #include <json-c/json.h>
> diff --git a/src/plugins/sched_events.c b/src/plugins/sched_events.c
> index c3a4f47..fc5dc54 100644
> --- a/src/plugins/sched_events.c
> +++ b/src/plugins/sched_events.c
> @@ -14,6 +14,7 @@
> #include <stdio.h>
>
> // trace-cmd
> +#define _GNU_SOURCE /* See feature_test_macros(7) */
> #include <trace-cmd.h>
>
> // KernelShark
prev parent reply other threads:[~2023-10-10 22:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-10 19:26 [PATCH 1/1] Fix incompatible function pointer types assigning to stream_find_id_func Brahmajit Das
2023-10-10 22:34 ` Steven Rostedt [this message]
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