[PATCH bpf-next 4/4] bpftool: treat compilation warnings as errors
From: Andrii Nakryiko <andrii@kernel.org>
Date: 2021-03-17 03:04:24
Also in:
bpf
Subsystem:
bpf [general] (safe dynamic programs and tools), bpf [tooling] (bpftool), the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Quentin Monnet, Linus Torvalds
Make bpftool compilation stricter and treat all compilation warnigs as errors.
Depending on libbfd version on the system, jit_disasm.c might trigger the
following compilation warning-turned-error:
jit_disasm.c: In function ‘disasm_print_insn’:
jit_disasm.c:121:29: error: assignment discards ‘const’ qualifier from pointer
target type [-Werror=discarded-qualifiers]
info.disassembler_options = disassembler_options;
^
This was fixed in libbfd, but older versions of the library are still widely
used. So disable -Wdiscarded-qualifiers for that particular line of code.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
---
tools/bpf/bpftool/Makefile | 3 ++-
tools/bpf/bpftool/jit_disasm.c | 3 +++
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile
index b3073ae84018..59de954faaf5 100644
--- a/tools/bpf/bpftool/Makefile
+++ b/tools/bpf/bpftool/Makefile@@ -56,7 +56,8 @@ prefix ?= /usr/local bash_compdir ?= /usr/share/bash-completion/completions CFLAGS += -O2 -CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers +CFLAGS += -W -Wall -Wextra -Werror +CFLAGS += -Wno-unused-parameter -Wno-missing-field-initializers CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS)) CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \ -I$(if $(OUTPUT),$(OUTPUT),.) \
diff --git a/tools/bpf/bpftool/jit_disasm.c b/tools/bpf/bpftool/jit_disasm.c
index e7e7eee9f172..48bc7f7a542f 100644
--- a/tools/bpf/bpftool/jit_disasm.c
+++ b/tools/bpf/bpftool/jit_disasm.c@@ -118,7 +118,10 @@ void disasm_print_insn(unsigned char *image, ssize_t len, int opcodes, info.arch = bfd_get_arch(bfdf); info.mach = bfd_get_mach(bfdf); if (disassembler_options) +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wdiscarded-qualifiers" info.disassembler_options = disassembler_options; +#pragma GCC diagnostic push info.buffer = image; info.buffer_length = len;
--
2.30.2