Hello Masahiro,
On 10-06-14 10:39, Masahiro Yamada wrote:
Hi Jeroen,
On Sat, 31 May 2014 22:32:20 +0200
Jeroen Hofstee <jer...@myspectrum.nl> wrote:
By default clang will return echo a warning if an option is unknown.
Therefore turn warnings into errors when polling for options.
As far as I tested with clang 3.5 on Ubuntu 14.04,
it looks different.
$ clang -fno-delete-null-pointer-checks helloworld.c
clang: error: unknown argument: '-fno-delete-null-pointer-checks'
$ echo $?
1
Yes it seems to be restricted to warning options. The -Werror=date-time
causes a lot of noise e.g. when building with clang 3.4. With 3.5 this
option
seems to be added, but behavior for unrecognized warnings flags remained
the same, see below.
Regards,
Jeroen
[jeroen@freebsd /usr/home/jeroen]$ clang -v
FreeBSD clang version 3.4.1 (tags/RELEASE_34/dot1-final 208032) 20140512
Target: x86_64-unknown-freebsd11.0
Thread model: posix
Selected GCC installation:
[jeroen@freebsd /usr/home/jeroen]$ clang -Werror=date-time a.c
warning: unknown warning option '-Werror=date-time'
[-Wunknown-warning-option]
1 warning generated.
[jeroen@freebsd /usr/home/jeroen]$ echo $?
0
[jeroen@freebsd /usr/home/jeroen]$ clang -Werror -Werror=date-time a.c
error: unknown warning option '-Werror=date-time'
[-Werror,-Wunknown-warning-option]
[jeroen@freebsd /usr/home/jeroen]$ echo $?
1
jeroen@yellow:~$ clang -v
clang version 3.5.0 (g...@github.com:jhofstee/clang.git
f533fd477a50467a0d96293d116f4059aa806b65)
(g...@github.com:jhofstee/llvm.git 6b7ff6be9c1bcf8ce440c7f1c7646fbf059562e4)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/4.8.1
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8.1
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/4.8
Candidate multilib: .;@m64
Selected multilib: .;@m64
jeroen@yellow:~$ clang -Werror=date-time a.c
jeroen@yellow:~$ clang -Werror=date-time-newer a.c
warning: unknown warning option '-Werror=date-time-newer'; did you mean
'-Werror=date-time'? [-Wunknown-warning-option]
1 warning generated.
jeroen@yellow:~$ echo $?
0
jeroen@yellow:~$ clang -Werror -Werror=date-time-newer a.c
error: unknown warning option '-Werror=date-time-newer'; did you mean
'-Werror=date-time'? [-Werror,-Wunknown-warning-option]
jeroen@yellow:~$ echo $?
1
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