sergiotarxz/nuttx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Don't typedef wchar_t for C++

Browse Source 
wchar_t is a builtin type in C++.

clang complains like the following even with -fshort-wchar:

    error: cannot combine with previous 'type-name' declaration specifier

my clang version if it matters:

    spacetanuki% clang++ --version
    Apple clang version 11.0.0 (clang-1100.0.33.17)
    Target: x86_64-apple-darwin18.7.0
    Thread model: posix
    InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
    spacetanuki% clang++ -dM -E - < /dev/null | grep WCHAR
    #define __CLANG_ATOMIC_WCHAR_T_LOCK_FREE 2
    #define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
    #define __SIZEOF_WCHAR_T__ 4
    #define __WCHAR_MAX__ 2147483647
    #define __WCHAR_TYPE__ int
    #define __WCHAR_WIDTH__ 32
    spacetanuki% clang++ -fshort-wchar -dM -E - < /dev/null | grep WCHAR
    #define __CLANG_ATOMIC_WCHAR_T_LOCK_FREE 2
    #define __GCC_ATOMIC_WCHAR_T_LOCK_FREE 2
    #define __SIZEOF_WCHAR_T__ 2
    #define __WCHAR_MAX__ 65535
    #define __WCHAR_TYPE__ unsigned short
    #define __WCHAR_UNSIGNED__ 1
    #define __WCHAR_WIDTH__ 16
    spacetanuki%
This commit is contained in:
YAMAMOTO Takashi 2020-11-02 09:32:06 +09:00 committed by Xiang Xiao
parent e91a806ab6
commit e99e185712
1 changed files with 2 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/sys/types.h
View File

@ -178,10 +178,9 @@ typedef int16_t key_t;
typedef intptr_t ptrdiff_t;
#ifndef CONFIG_WCHAR_BUILTIN
#if !defined(__cplusplus)
/* Wide, 16-bit character types. wchar_t is a built-in type in C++ and
* its declaration here may cause compilation errors on some compilers
* if -DCONFIG_WCHAR_BUILTIN is not included in the CXXFLAGS.
* its declaration here may cause compilation errors on some compilers.
*
* REVISIT: wchar_t belongs in stddef.h
*/