[lfs-support] Libstdc++ Compilation Error at os_defines.h

[David Bernado]

Hello,

I am currently in the process of a Linux From Scratch build as a school project, mainly following the development book. Everything went well thus far until I had to compile and install libstdc++. Upon running the "make" command after creating the build directory and config file, it throws this error:

In file included from /mnt/lfs/sources/gcc-7.3.0/build-std/include/x86_64-lfs-linux-gnu/bits/c++config.h:533:0,

from /mnt/lfs/sources/gcc-7.3.0/libstdc++-v3/libsupc++/cxxabi.h:49,

from ../../libstdc++-v3/libsupc++/atexit_thread.cc:24:

/mnt/lfs/sources/gcc-7.3.0/build-std/include/x86_64-lfs-linux-gnu/bits/os_defines.h:44:19: error: missing binary operator before token "("

#if __GLIBC_PREREQ(2,15) && defined(_GNU_SOURCE)

This is one of 4 similar errors thrown up at compile time, I assume at other places in the package where os_defines.h is referenced. Has anyone ran into this error and/or knows how to fix it? A quick response would be greatly appreciated, made some pretty stupid mistakes in previous attempts at this and deadline is approaching very soon. 😟

Thanks,
David

[Pierre Labastie]

Post by David Bernado
Hello,
I am currently in the process of a Linux From Scratch build as a school
project, mainly following the development book. Everything went well thus far
until I had to compile and install libstdc++. Upon running the "make" command
In file included from
/mnt/lfs/sources/gcc-7.3.0/build-std/include/x86_64-lfs-linux-gnu/bits/c++config.h:533:0,
                 from
/mnt/lfs/sources/gcc-7.3.0/libstdc++-v3/libsupc++/cxxabi.h:49,
error: missing binary operator before token "("
#if __GLIBC_PREREQ(2,15) && defined(_GNU_SOURCE)

Isn't there a further explanation of the error: usually, gcc gives the
location of the macros used (in this case __GLIBC_PREREQ), so that one can see
what is generated and why it fails.

Then, usual questions are:
- Is the lfs user environment correctly set? "echo $LFS $LFS_TGT" should be
run often enough to check (or "env").
- Does the output of the version-check.sh script in "2.2- Host System
Requirements" match expectations (you may post the output to us if you are not
sure)
- Are you sure you entered the instructions as given? Of course there are
other ways to build LFS, but we cannot help on those, since we have not tried
them. I see you have at least deviated in the name of the build directory
(build-std). Not a big deal of course, if it is the only deviation.
- Did you erase the gcc-7.3.0 directory after gcc-pass1? This is what we
suppose in the instructions. It may lead to unexpected results if not (even
when changing the name of the build directory).

Post by David Bernado
This is one of 4 similar errors thrown up at compile time, I assume at other
places in the package where os_defines.h is referenced. Has anyone ran into
this error and/or knows how to fix it? A quick response would be greatly
appreciated, made some pretty stupid mistakes in previous attempts at this and
deadline is approaching very soon. 😟

I don't remember hearing about this error, but maybe others on the list have.
Wait for them to wake up: they are in US or Australia... BTW, we can't find
your mistakes if you don't post what you've done ;-)

Pierre
--
http://lists.linuxfromscratch.org/listinfo/lfs-support
FAQ: http://www.linuxfromscratch.org/blfs/faq.html
Unsubscribe: See the above information page

Do not top post on this list.

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

http://en