[cfe-dev] Help: compiler's error using -stdlib=libc++ with clang++-3.8

Richard Smith via cfe-dev cfe-dev at lists.llvm.org
Sat Jul 22 06:07:49 PDT 2017 

Based on the errors, I would guess that the offsetof macro is not defined.
Maybe there's something wrong with your include path?

On 22 Jul 2017 3:54 am, "zosrothko via cfe-dev" <cfe-dev at lists.llvm.org>
wrote:

> Hello CFE list
>
> Sorry to post again this post, but I am really stacked on this problem.
>
> I have an issue compiling a small c++ program with clang++-3.8 on Ubuntu
> trusty
>
> Using the joined c++ program bug.cpp,
>
>    - clang++-3.8 -std=c++11 bug.cpp compiles fine while
>    - clang++-3.8 -std=c++11 -stdlib=libc++ bug.cpp produces invalid
>    compile errors.
>
>
> What could be the problem and how can it be solved?
>
> TIA
>
> fandre at ubuntu-trusty-64:~/clang$ uname -a
> Linux ubuntu-trusty-64 4.4.0-83-generic #106~14.04.1-Ubuntu SMP Mon Jun 26
> 18:10:19 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
> fandre at ubuntu-trusty-64:~/clang$ clang++-3.8 --version
> clang version 3.8.0-2ubuntu3~trusty4 (tags/RELEASE_380/final)
> Target: x86_64-unknown-linux-gnu
> Thread model: posix
> InstalledDir: /usr/bin
>
> Below is the console log
>
> fandre at ubuntu-trusty-64:~/clang$ clang++-3.8 -std=c++11 bug.cpp
> fandre at ubuntu-trusty-64:~/clang$ clang++-3.8 -std=c++11 -stdlib=libc++
> bug.cpp
> bug.cpp:56:88: error: 'Header' does not refer to a value
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, code) == 0x01)>)> poco_...
>
> ^
> bug.cpp:45:9: note: declared here
>  struct Header
>         ^
> bug.cpp:56:96: error: use of undeclared identifier 'code'
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, code) == 0x01)>)> poco_...
>
>                                    ^
> bug.cpp:56:111: error: type name requires a specifier or qualifier
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, code) == 0x01)>)> poco_...
>
>                                                   ^
> bug.cpp:57:88: error: 'Header' does not refer to a value
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, checksum) == 0x02)>)> p...
>
> ^
> bug.cpp:45:9: note: declared here
>  struct Header
>         ^
> bug.cpp:57:96: error: use of undeclared identifier 'checksum'
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, checksum) == 0x02)>)> p...
>
>                                    ^
> bug.cpp:57:115: error: type name requires a specifier or qualifier
>   ...poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, checksum) == 0x02)>)> poco_stati...
>
>                                                   ^
> bug.cpp:58:88: error: 'Header' does not refer to a value
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, id) == 0x04)>)> poco_st...
>
> ^
> bug.cpp:45:9: note: declared here
>  struct Header
>         ^
> bug.cpp:58:96: error: use of undeclared identifier 'id'
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, id) == 0x04)>)> poco_st...
>
>                                    ^
> bug.cpp:58:109: error: type name requires a specifier or qualifier
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, id) == 0x04)>)> poco_st...
>
>                                                 ^
> bug.cpp:59:88: error: 'Header' does not refer to a value
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, seq) == 0x06)>)> poco_s...
>
> ^
> bug.cpp:45:9: note: declared here
>  struct Header
>         ^
> bug.cpp:59:96: error: use of undeclared identifier 'seq'
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, seq) == 0x06)>)> poco_s...
>
>                                    ^
> bug.cpp:59:110: error: type name requires a specifier or qualifier
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, seq) == 0x06)>)> poco_s...
>
>                                                  ^
> 12 errors generated.
> fandre at ubuntu-trusty-64:~/clang$ cp bug.cpp ../shared
> fandre at ubuntu-trusty-64:~/clang$ clang++-3.8 -std=c++11 bug.cpp
> fandre at ubuntu-trusty-64:~/clang$ clang++-3.8 -std=c++11 -stdlib=libc++
> bug.cpp
> bug.cpp:56:88: error: 'Header' does not refer to a value
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, code) == 0x01)>)> poco_...
>
> ^
> bug.cpp:45:9: note: declared here
>  struct Header
>         ^
> bug.cpp:56:96: error: use of undeclared identifier 'code'
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, code) == 0x01)>)> poco_...
>
>                                    ^
> bug.cpp:56:111: error: type name requires a specifier or qualifier
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, code) == 0x01)>)> poco_...
>
>                                                   ^
> bug.cpp:57:88: error: 'Header' does not refer to a value
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, checksum) == 0x02)>)> p...
>
> ^
> bug.cpp:45:9: note: declared here
>  struct Header
>         ^
> bug.cpp:57:96: error: use of undeclared identifier 'checksum'
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, checksum) == 0x02)>)> p...
>
>                                    ^
> bug.cpp:57:115: error: type name requires a specifier or qualifier
>   ...poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, checksum) == 0x02)>)> poco_stati...
>
>                                                   ^
> bug.cpp:58:88: error: 'Header' does not refer to a value
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, id) == 0x04)>)> poco_st...
>
> ^
> bug.cpp:45:9: note: declared here
>  struct Header
>         ^
> bug.cpp:58:96: error: use of undeclared identifier 'id'
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, id) == 0x04)>)> poco_st...
>
>                                    ^
> bug.cpp:58:109: error: type name requires a specifier or qualifier
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, id) == 0x04)>)> poco_st...
>
>                                                 ^
> bug.cpp:59:88: error: 'Header' does not refer to a value
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, seq) == 0x06)>)> poco_s...
>
> ^
> bug.cpp:45:9: note: declared here
>  struct Header
>         ^
> bug.cpp:59:96: error: use of undeclared identifier 'seq'
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, seq) == 0x06)>)> poco_s...
>
>                                    ^
> bug.cpp:59:110: error: type name requires a specifier or qualifier
>  typedef poco_static_assert_test<sizeof(POCO_STATIC_ASSERTION_FAILURE<(bool)
> (offsetof(Header, seq) == 0x06)>)> poco_s...
>
>                                                  ^
> 12 errors generated.
> fandre at ubuntu-trusty-64:~/clang$
>
>
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