Re: 21.5-b28 strange behaviour: buffer modification flag set, even though I can't remember having changed anything, patch for configure on aix
Thomas Mittelstaedt writes:
Thanks for following up! BTW, is the buffer modification problem gone?
Just built xemacs without -pthread (or -mthreads) and it runs. The
gcc
4.2.2 man page says about -mthreads that it's needed
for multi-threaded exception handling on mingw.
That looks like an irrelevancy to me, since mingw is a GCC runtime
environment for Microsoft Windows. I suspect that some other AIX
compiler (possibly obsolete) does need -mthreads, which has semantics
specific to that compiler.
Don't feel you *need* to dig, but if you do find any references or
conversation at an AIX user group or whatever, we'd greatly appreciate
an update!
We use -pthread to link with the correct, multi-threaded version of
the libstdc++ library, which on aix 5.2 are in separate directories:
pthreads should be irrelevant to XEmacs, even with --xemacs-compiler=c++.
tmstaedtï¼ buildaix3$ find /opt/gcc-4.2.2/lib -name libstdc++*
/opt/gcc-4.2.2/lib/gcc/powerpc-ibm-aix5.2.0.0/4.2.2/pthread/ppc64/libstdc++.a
/opt/gcc-4.2.2/lib/gcc/powerpc-ibm-aix5.2.0.0/4.2.2/pthread/ppc64/libstdc++.la
/opt/gcc-4.2.2/lib/gcc/powerpc-ibm-aix5.2.0.0/4.2.2/pthread/libstdc++.a
/opt/gcc-4.2.2/lib/gcc/powerpc-ibm-aix5.2.0.0/4.2.2/pthread/libstdc++.la
/opt/gcc-4.2.2/lib/gcc/powerpc-ibm-aix5.2.0.0/4.2.2/ppc64/libstdc++.a
tmstaedtï¼ buildaix3$ gcc -v
Using built-in specs.
Target: powerpc-ibm-aix5.2.0.0
Configured with: ../gcc-4.2.2/configure
--enable-version-specific-runtime-libs --enable-static --enable-shared
--enable-threads --with-as=/usr/bin/as --without-gnu-ld
--with-ld=/usr/bin/ld --prefix=/opt/gcc-4.2.2 --disable-nls --with-pic
--disable-symvers --enable-symvers=no --enable-languages=c,c++,objc
Thread model: aix
gcc version 4.2.2
Thank you!
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