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Date:	Wed, 5 Jul 2023 01:48:08 +0900
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Subject:	iostream doesn't work (clang++)
To:	cygwin AT cygwin DOT com
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From:	ggl329 via Cygwin <cygwin AT cygwin DOT com>
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Sender:	"Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com>

Hi,

clang++ fails with iostream.
Does it go well in your environment?
# I noticed that clang is orphaned. clang requires a maintainer?


$ cat sample.cc
#include <iostream>
int main()
{
     std::cout << "Hello World.\n";
     return 0;
}

$ g++ sample.cc
$ ./a
Hello World.

$ clang++ sample.cc
In file included from sample.cc:1:
In file included from /usr/lib/gcc/x86_64-pc-cygwin/11/include/c++/iostream:39:
In file included from /usr/lib/gcc/x86_64-pc-cygwin/11/include/c++/ostream:38:
In file included from /usr/lib/gcc/x86_64-pc-cygwin/11/include/c++/ios:42:
In file included from /usr/lib/gcc/x86_64-pc-cygwin/11/include/c++/bits/ios_base.h:39:
In file included from /usr/lib/gcc/x86_64-pc-cygwin/11/include/c++/ext/atomicity.h:35:
In file included from /usr/lib/gcc/x86_64-pc-cygwin/11/include/c++/x86_64-pc-cygwin/bits/gthr.h:148:
In file included from /usr/lib/gcc/x86_64-pc-cygwin/11/include/c++/x86_64-pc-cygwin/bits/gthr-default.h:35:
In file included from /usr/include/pthread.h:11:
In file included from /usr/include/sys/types.h:221:
In file included from /usr/include/sys/_pthreadtypes.h:12:
/usr/include/sys/cpuset.h:45:24: error: use of undeclared identifier '__builtin_malloc'; did you mean
       '__builtin_alloca'?
   return (cpu_set_t *) __builtin_malloc (CPU_ALLOC_SIZE(num));
                        ^
/usr/include/sys/cpuset.h:45:24: note: '__builtin_alloca' declared here
/usr/include/sys/cpuset.h:52:3: error: use of undeclared identifier '__builtin_free'
   __builtin_free (set);
   ^
2 errors generated.


Package version information which may be related.

Cygwin Package Information
Package              Version
binutils             2.40-1
clang                8.0.1-1
compiler-rt          8.0.1-1
cygwin               3.4.7-1
cygwin-devel         3.4.7-1
gcc-core             11.4.0-1
gcc-g++              11.4.0-1
libc++-devel         8.0.1-1
libc++1              8.0.1-1
libc++abi-devel      8.0.1-1
libc++abi1           8.0.1-1
libclang-devel       8.0.1-1
libclang8            8.0.1-1
libllvm-devel        8.0.1-1
libllvm8             8.0.1-1
libpolly-devel       8.0.1-1
libpolly8            8.0.1-1
libstdc++6           11.4.0-1
libunwind-devel      8.0.1-1
libunwind1           8.0.1-1
llvm                 8.0.1-1

-- 
   ggl329

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