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x32 glibc status


Thanks to Roland's help, most of x32 changes are now on master.
The remaining ones are

1. time/mktime.c.  I got

mktime.c: In function ‘ydhms_diff’:
mktime.c:170:56: error: size of array ‘a’ is negative

We need to update mktime.c to gnulib version.
2. gettimeofday.c and time.c.  Roland and I are working on them.
3. malloc/malloc.c.  After #1 and #2 are fixed, one can build x32 glibc
as a cross target:

# BUILD_CC="gcc" CC="gcc -mx32" CXX="g++ -mx32" CFLAGS="-O2 -g"
/export/gnu/import/git/sources/glibc/configure --enable-add-ons=nptl
--prefix=/usr --target=x86_64-x32-linux --build=x86_64-linux

At this pointer, most of binaries will segfault due to malloc alignment
issue.  I will submit malloc patches after #1 and #2 aee fixed.
4. abilist files.   I will submit them after #1 and #2 are fixed.
5. X32 C++ type data.  I will submit it after  #1 and #2 are fixed.
6. stubs-biarch.h and lib-names.h. The current scheme doesn't support
more than 2 ABIs.  I have patches. But they are x86-64 specific. I will
try to find a generic solution, similar to syscall.h.



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