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libm/newlib: fix newlib build error

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Fix error :
nuttx/libs/libm/newlib/include/math.h:89:8: error: ‘_Thread_local’ does not name a type; did you mean ‘thread_local’?
   89 | extern _Thread_local int _tls_gamma_signgam;
      |        ^~~~~~~~~~~~~
      |        thread_local
In file included from /mnt/nuttx/include/libcxx/math.h:300,
                 from /mnt/nuttx/include/libcxx/cmath:308,
                 from /mnt/nuttx/include/libcxx/charconv:79,
                 from libcxx/src/string.cpp:10:
/mnt/nuttx/libs/libm/newlib/include/math.h:89:8: error: ‘_Thread_local’ does not name a type; did you mean ‘thread_local’?
   89 | extern _Thread_local int _tls_gamma_signgam;

Signed-off-by: yanghuatao <yanghuatao@xiaomi.com>
This commit is contained in:
yanghuatao 2023-08-07 17:20:19 +08:00 committed by Alan Carvalho de Assis
parent 6ba12d4b96
commit 3ccc5f0f76
1 changed files with 21 additions and 0 deletions
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21
libs/libm/newlib/include/math.h
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@ -44,6 +44,27 @@ extern "C"
# endif
#endif /* __GNUC_PREREQ */
#ifndef __has_extension
# ifdef __has_feature
# define __has_extension __has_feature
# else
# define __has_extension(x) 0
# endif
#endif
#if !__has_extension(c_thread_local)
/* XXX: Some compilers (Clang 3.3, GCC 4.7) falsely announce C++11 mode
* without actually supporting the thread_local keyword. Don't check for
* the presence of C++11 when defining _Thread_local.
*/
# if /* (defined(__cplusplus) && __cplusplus >= 201103L) || */ \
__has_extension(cxx_thread_local)
# define _Thread_local thread_local
# else
# define _Thread_local __thread
# endif
#endif
/* Newlib doesn't fully support long double math functions so far.
* On platforms where long double equals double the long double functions
* let's define _LDBL_EQ_DBL to simply call the double functions.