Matt Burgess wrote:
> On Thu, 2013-03-07 at 14:57 +0100, Pierre Labastie wrote:
>
>> Please add --with-sysroot to the configure switches in binutils-pass2.
>> It is harmless (just adds a feature to ld), and corrects that bug.
>
> I think you meant --with-build-sysroot, right? The configure help
> output for that says
>
> --with-build-sysroot=SYSROOT
> use sysroot as the system root during the build
>
> So, I assume just '--with-build-sysroot' is enough,
Looking at configure.ac, it does look like SYSROOT is the default and
does not need to be specified explicitly.
i.e. setting it to a
> null value? I still don't understand what that flag does and why/how it
> fixes this issue. More importantly, I don't understand if it will
> affect our builds in any other way.
Looking at configure:
if test "${with_build_sysroot+set}" = set; then :
withval=$with_build_sysroot; if test x"$withval" != x ; then
SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
fi
else
SYSROOT_CFLAGS_FOR_TARGET=
fi
It appears that it only sets SYSROOT_CFLAGS_FOR_TARGET if there is a
value specified.
Digging a little further, SYSROOT_CFLAGS_FOR_TARGET is used/specified in
Makefile.in and Makefile.tpl (autogen template)
# Makefile.in is generated from Makefile.tpl by 'autogen Makefile.def'.
XGCC_FLAGS_FOR_TARGET = $(FLAGS_FOR_TARGET) $(SYSROOT_CFLAGS_FOR_TARGET)
$(DEBUG_PREFIX_CFLAGS_FOR_TARGET)
Running './configure --with-build-sysroot=SYSROOT', I find
Makefile:SYSROOT_CFLAGS_FOR_TARGET = --sysroot=SYSROOT
Re-running configure without --with-build-sysroot=SYSROOT', I only see:
Makefile:SYSROOT_CFLAGS_FOR_TARGET =
Running './configure --with-build-sysroot', I have:
Makefile:SYSROOT_CFLAGS_FOR_TARGET = --sysroot=yes
In both chapter05/gcc-pass1 and chapter05/binutils-pass1, we use
--with-sysroot=$LFS.
I'm getting a little lost here. Evidently check is not finding
libpthread.so under some circumstances, but I don't know why. It should
be in $LFS/tools/lib/. Perhaps setting
LD_LIBRARY_PATH=$LFS/lib:$LFS/usr/lib:$LFS/tools/lib (maybe in Section
4.4) would be sufficient.
I do see that the contents of $LFS/tools/lib/libpthread.so are:
/* GNU ld script
Use the shared library, but some functions are only in
the static library, so try that secondarily. */
OUTPUT_FORMAT(elf64-x86-64)
GROUP ( /tools/lib/libpthread.so.0 /tools/lib/libpthread_nonshared.a )
-- Bruce
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