https://bugs.llvm.org/show_bug.cgi?id=40616
Bug ID: 40616
Summary: clang warning: unknown warning option
'-Wno-old-style-declaration'
Product: clang
Version: 7.0
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: trankimthang...@gmail.com
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org,
neeil...@live.com, richard-l...@metafoo.co.uk
OVERVIEW:
There seems to be problem with clang and warning option
'-Wno-old-style-declaration'.
testaccount@testmachine:~$ uname -a
Linux testmachine 4.15.0-45-generic #48-Ubuntu SMP Tue Jan 29 16:28:13 UTC
2019 x86_64 x86_64 x86_64 GNU/Linux
testaccount@testmachine:~$ clang-7 -v
clang version 7.0.0-3~ubuntu0.18.04.1 (tags/RELEASE_700/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
Found candidate GCC installation: /usr/bin/../lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation:
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.3.0
Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/i686-linux-gnu/8
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.3.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8
Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/7.3.0
Candidate multilib: .;@m64
Selected multilib: .;@m64
STEP TO REPRODUCE:
testaccount@testmachine:~$ echo "__clang__ __GNUC__ __GNUC_MINOR__
__GNUC_PATCHLEVEL__ __clang_major__ __clang_minor__ __clang_patchlevel__" |
/usr/bin/clang-7 -E -P -Wno-old-style-declaration -
warning: unknown warning option '-Wno-old-style-declaration'; did you mean
'-Wno-out-of-line-declaration'? [-Wunknown-warning-option]
1 4 2 1 7 0 0
1 warning generated.
ADDITIONAL INFOS:
This issue also appears on clang-5 and clang-6.
GCC (>=4.3) does not have this problem however.
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