On Sun, Nov 20, 2016 at 12:22 PM, Andrew Haley <aph@xxxxxxxxxx> wrote:
> So do I. Try using -Wl,-Map,mapfile. That should explain what is
> happening.
I looked at that (see below). I'm a bit out of touch with GCC
internals. The last time I did GCC hacking was in the 1.x days (long
before it even supported C++). The only odd things I noticed:
* It seems to make mention of libc_nonshared.a even though the
default (should be) shared.
* I see tons of transactional memory stuff. I compiled GCC using
--disable-libitm and am hoping I can turn that stuff off. But it still
generates code for transactional memory.
> Turn some things off.
>
> -fno-lto
That was one of the first things I tried. I also tried turning off 128
bit doubles. I've tried quite a few things. I am also going to try
compiling the same toolchain directly on the target. Sadly it's been
compiling GCC for 3 days now and seems about 70% done.
> It is possible you're looking at linker bugs or the linker has been#
> miscompiled. Keep an open mind.
I was torn between reporting this to binutils vs. GCC. But my
rationale for going here was that it seems to me libstdc++ is
mis-compiled. And this is the libstdc++ bundled with GCC.
I should also mention:
* Compiling C++ code with full on static linking works.
* Compiling C code works fine (static or dynamically linked).
Any idea how to proceed?
Thanks,
Mark.
Archive member included to satisfy reference by file (symbol)
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LOAD /emb-root/usr/lib/arm-linux-gnueabihf/crti.o
LOAD /opt/cross/lib/gcc/arm-linux-gnueabihf/6.2.0/crtbegin.o
LOAD /tmp/ccSvfKpD.o
LOAD /opt/cross/lib/gcc/arm-linux-gnueabihf/6.2.0/../../../../arm-linux-gnueabihf/lib/libstdc++.so
LOAD /emb-root/usr/lib/arm-linux-gnueabihf/libm.a
LOAD /opt/cross/lib/gcc/arm-linux-gnueabihf/6.2.0/../../../../arm-linux-gnueabihf/lib/libgcc_s.so
START GROUP
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LOAD /opt/cross/lib/gcc/arm-linux-gnueabihf/6.2.0/libgcc.a
END GROUP
LOAD /opt/cross/lib/gcc/arm-linux-gnueabihf/6.2.0/libgcc.a
LOAD /emb-root/usr/lib/arm-linux-gnueabihf/libc.so
START GROUP
LOAD /emb-root/lib/arm-linux-gnueabihf/libc.so.6
LOAD /emb-root/usr/lib/arm-linux-gnueabihf/libc_nonshared.a
LOAD /emb-root/lib/arm-linux-gnueabihf/ld-linux-armhf.so.3
END GROUP
LOAD /opt/cross/lib/gcc/arm-linux-gnueabihf/6.2.0/../../../../arm-linux-gnueabihf/lib/libgcc_s.so
START GROUP
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LOAD /opt/cross/lib/gcc/arm-linux-gnueabihf/6.2.0/libgcc.a
END GROUP
LOAD /opt/cross/lib/gcc/arm-linux-gnueabihf/6.2.0/libgcc.a
LOAD /opt/cross/lib/gcc/arm-linux-gnueabihf/6.2.0/crtend.o
LOAD /emb-root/usr/lib/arm-linux-gnueabihf/crtn.o
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