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From: "kadler at us dot ibm.com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug build/27123] Build fails for AIX 6.1
Date: Fri, 05 Aug 2022 21:44:58 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D27123

Kevin Adler <kadler at us dot ibm.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kadler at us dot ibm.com

--- Comment #2 from Kevin Adler <kadler at us dot ibm.com> ---
GCC has separate ABIs on AIX: threaded and non-threaded. Without the -pthre=
ad
flag, GCC will use the non-threaded ABI which does not define thread-related
C++ classes. These definitions are guarded by #ifdef _GLIBCXX_HAS_GTHREADS
which is set in one of:
- include/c++/.../bits/c++config.h
- include/c++/.../ppc64/bits/c++config.h
- include/c++/.../pthread/bits/c++config.h
- include/c++/.../pthread/ppc64/bits/c++config.h

depending on which -maix32/-maix64 and -pthread parameters (if any) were
passed. (Note that GCC 10, IIRC, changed the above layout to
ppc{32,64}/{pthread,} instead.)


If the build rule for thread-pool.cc is not passing the -pthread option, th=
ese
sorts of compilation errors will occur. The "make V=3D1" output would be he=
lpful
to diagnose the problem further or see if the rule uses PTHREAD_CFLAGS.

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