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Message-ID: <133250.1566965715@turing-police>
Date: Wed, 28 Aug 2019 00:15:15 -0400
From: "Valdis Klētnieks" <valdis.kletnieks@...edu>
To: Josh Poimboeuf <jpoimboe@...hat.com>,
Peter Zijlstra <peterz@...radead.org>
Cc: linux-kernel@...r.kernel.org
Subject: next-20190826 - objtool fails to build.
OK. I'm mystified. next-20190806 built fine. -0818 and -0826 died a
glorious death indeed. All 3 were build using the same Fedora Rawhide 9.1.1
compiler (installed on July 30). 'git log -- tools/objtool' comes up empty.
Local hack-around was to remove the -Werror from tools/objtool/Makefile
Am particularly mystified by the errors on lines 808/809 - the same compiler that
was happy with the same code in next-0806 is now upset. The others could possibly
be a stray typedef in an include someplace, but those two errors have me stumped.
For that matter, I'm not even seeing how -Wsign-compare was even getting set, given
a command 'make' and not W=1 or W=2....
(cue twilight zone theme)
CALL scripts/checksyscalls.sh
CALL scripts/atomic/check-atomics.sh
DESCEND objtool
HOSTCC /usr/src/linux-next/tools/objtool/fixdep.o
HOSTLD /usr/src/linux-next/tools/objtool/fixdep-in.o
LINK /usr/src/linux-next/tools/objtool/fixdep
CC /usr/src/linux-next/tools/objtool/exec-cmd.o
CC /usr/src/linux-next/tools/objtool/help.o
CC /usr/src/linux-next/tools/objtool/pager.o
CC /usr/src/linux-next/tools/objtool/parse-options.o
CC /usr/src/linux-next/tools/objtool/run-command.o
CC /usr/src/linux-next/tools/objtool/sigchain.o
CC /usr/src/linux-next/tools/objtool/subcmd-config.o
LD /usr/src/linux-next/tools/objtool/libsubcmd-in.o
AR /usr/src/linux-next/tools/objtool/libsubcmd.a
CC /usr/src/linux-next/tools/objtool/builtin-check.o
CC /usr/src/linux-next/tools/objtool/builtin-orc.o
CC /usr/src/linux-next/tools/objtool/check.o
check.c: In function '__dead_end_function':
check.c:158:17: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare]
158 | for (i = 0; i < ARRAY_SIZE(global_noreturns); i++)
| ^
check.c: In function 'add_dead_ends':
check.c:330:25: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare]
330 | else if (rela->addend == rela->sym->sec->len) {
| ^~
check.c:372:25: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare]
372 | else if (rela->addend == rela->sym->sec->len) {
| ^~
check.c: In function 'add_jump_destinations':
check.c:560:36: warning: comparison of integer expressions of different signedness: 'long unsigned int' and 'int' [-Wsign-compare]
560 | if (insn->ignore || insn->offset == FAKE_JUMP_OFFSET)
| ^~
check.c: In function 'handle_jump_alt':
check.c:808:49: warning: unused parameter 'file' [-Wunused-parameter]
808 | static int handle_jump_alt(struct objtool_file *file,
| ~~~~~~~~~~~~~~~~~~~~~^~~~
check.c:809:27: warning: unused parameter 'special_alt' [-Wunused-parameter]
809 | struct special_alt *special_alt,
| ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
check.c: In function 'add_jump_table':
check.c:925:20: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare]
925 | rela->addend == pfunc->offset)
| ^~
check.c: In function 'read_unwind_hints':
check.c:1187:16: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare]
1187 | for (i = 0; i < sec->len / sizeof(struct unwind_hint); i++) {
| ^
CC /usr/src/linux-next/tools/objtool/orc_gen.o
CC /usr/src/linux-next/tools/objtool/orc_dump.o
orc_dump.c: In function 'orc_dump':
orc_dump.c:104:16: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
104 | for (i = 0; i < nr_sections; i++) {
| ^
CC /usr/src/linux-next/tools/objtool/elf.o
elf.c: In function 'find_section_by_index':
elf.c:41:16: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare]
41 | if (sec->idx == idx)
| ^~
elf.c: In function 'read_sections':
elf.c:148:16: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
148 | for (i = 0; i < sections_nr; i++) {
| ^
elf.c: In function 'read_relas':
elf.c:370:17: warning: comparison of integer expressions of different signedness: 'int' and 'Elf64_Xword' {aka 'long unsigned int'} [-Wsign-compare]
370 | for (i = 0; i < sec->sh.sh_size / sec->sh.sh_entsize; i++) {
| ^
CC /usr/src/linux-next/tools/objtool/special.o
special.c: In function 'get_alt_entry':
special.c:71:38: warning: unused parameter 'elf' [-Wunused-parameter]
71 | static int get_alt_entry(struct elf *elf, struct special_entry *entry,
| ~~~~~~~~~~~~^~~
special.c: In function 'special_get_alts':
special.c:182:21: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare]
182 | for (idx = 0; idx < nr_entries; idx++) {
| ^
CC /usr/src/linux-next/tools/objtool/objtool.o
CC /usr/src/linux-next/tools/objtool/libstring.o
CC /usr/src/linux-next/tools/objtool/libctype.o
CC /usr/src/linux-next/tools/objtool/str_error_r.o
LD /usr/src/linux-next/tools/objtool/objtool-in.o
LINK /usr/src/linux-next/tools/objtool/objtool
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