On 15/03/2018 05:34, David Bernado wrote:
> 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)
>
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).
> 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
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