[Bug bootstrap/40950] New: Bootstrap fails with in-tree gmp and without system C++ compiler

[Bug bootstrap/40950] New: Bootstrap fails with in-tree gmp and without system C++ compiler

[lucier at math dot purdue dot edu]

With this build script

#!/bin/tcsh
/bin/rm -rf *; ../../mainline/configure --enable-checking=release
--prefix=/pkgs/gcc-mainline-mem-stats --enable-languages=c
--enable-gather-detailed-mem-stats ; make -j 6 bootstrap >& build.log

on this OS:

heine:~/programs/gcc/objdirs/mainline> uname -a
Linux heine.math.purdue.edu 2.6.28-14-generic #47-Ubuntu SMP Sat Jul 25
01:19:55 UTC 2009 x86_64 GNU/Linux

with gmp 4.2.4 and mpfr-2.3.2 added to the mainline tree with revision

Mon Aug  3 12:57:15 EDT 2009
Mon Aug  3 16:57:15 UTC 2009 (revision 150373)

bootstrap fails when configuring gmp with the stage1 compiler with the message

checking how to run the C++ preprocessor... /lib/cpp
configure: error: C++ preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details.
make[2]: *** [configure-stage2-gmp] Error 1
make[2]: Leaving directory `/home/lucier/programs/gcc/objdirs/mainline'
make[1]: *** [stage2-bubble] Error 2
make[1]: Leaving directory `/home/lucier/programs/gcc/objdirs/mainline'
make: *** [bootstrap] Error 2

I'll attach build.log and gmp/config.log

and without a


-- 
           Summary: Bootstrap fails with in-tree gmp and without system C++
                    compiler
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: lucier at math dot purdue dot edu
 GCC build triplet: x86_64-unknown-linux-gnu
  GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40950

[Bug bootstrap/40950] Bootstrap fails with in-tree gmp and without system C++ compiler

[lucier at math dot purdue dot edu]

------- Comment #1 from lucier at math dot purdue dot edu  2009-08-03 17:15 -------
Created an attachment (id=18291)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18291&action=view)
Build log of failed bootstrap


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40950

[Bug bootstrap/40950] Bootstrap fails with in-tree gmp and without system C++ compiler

[lucier at math dot purdue dot edu]

------- Comment #2 from lucier at math dot purdue dot edu  2009-08-03 17:16 -------
Created an attachment (id=18292)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18292&action=view)
log of failed gmp configuration


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40950

[Bug bootstrap/40950] Bootstrap fails with in-tree gmp and without system C++ compiler

[lucier at math dot purdue dot edu]

------- Comment #3 from lucier at math dot purdue dot edu  2009-08-03 17:17 -------
Created an attachment (id=18293)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18293&action=view)
build log with right content type


-- 

lucier at math dot purdue dot edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #18291|0                           |1
        is obsolete|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40950

[Bug bootstrap/40950] Bootstrap fails with in-tree gmp and without system C++ compiler

[redi at gcc dot gnu dot org]

------- Comment #4 from redi at gcc dot gnu dot org  2009-08-14 11:30 -------
I'm seeing this on RHEL5 with the gcc-4.5-20090813 snapshot, GMP 4.3.1 and MPFR
2.4.1

I have /lib/cpp present (from the cpp package) but no system compilers
installed. Instead I have GCC 4.3.4 elsewhere in my path, but in-tree gmp build
tries to use /lib/cpp instead of the cpp in my path.

configure:11168: /lib/cpp -DNO_ASM conftest.cc
cpp: error trying to exec 'cc1plus': execvp: No such file or directory

GMP should not be trying to use /lib/cpp as a C++ preprocessor during
bootstrap.

I configure with --disable-bootstrap to avoid the error.


-- 

redi at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |redi at gcc dot gnu dot org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-08-14 11:30:42
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40950

[Bug bootstrap/40950] Bootstrap fails with in-tree gmp and without system C++ compiler

[rwild at gcc dot gnu dot org]

------- Comment #5 from rwild at gcc dot gnu dot org  2009-08-14 12:43 -------
Well in this case it has nothing to do with cpp, if you look at the respective
config.log file you see that earlier some in-tree g++ from an earlier stage,
  /home/lucier/programs/gcc/objdirs/mainline/./prev-gcc/g++
is not found because it has not been built, thus the build chooses an
installed g++.  The real error is that the toplevel fails to enable building
this g++ with your --enable-languages=c being set.  All the rest is followup
failure.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40950

[Bug bootstrap/40950] Bootstrap fails with in-tree gmp and without system C++ compiler

[redi at gcc dot gnu dot org]

------- Comment #6 from redi at gcc dot gnu dot org  2009-08-14 12:58 -------
I'm configuring with --enable-languages=c,c++ and still don't have a
prev-gcc/g++ (is g++ ever built in stage1?)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40950

[Bug bootstrap/40950] Bootstrap fails with in-tree gmp and without system C++ compiler

[rguenth at gcc dot gnu dot org]

------- Comment #7 from rguenth at gcc dot gnu dot org  2009-08-14 13:02 -------
Use --enable-stage1-languages=c,c++


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40950

[Bug bootstrap/40950] Bootstrap fails with in-tree gmp and without system C++ compiler

[redi at gcc dot gnu dot org]

------- Comment #8 from redi at gcc dot gnu dot org  2009-08-14 13:13 -------
Thanks, Richard.

If in-tree gmp is going to use --enable-cxx (which it seems to, even though I'm
not building with ppl and cloog-ppl) then should the c++ compiler be built in
stage1 automatically?

Alternatively, gmp's configure should look in PATH instead of assuming either
stage1 or /lib/cpp will support C++, because that assumption isn't valid.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40950

[Bug bootstrap/40950] Bootstrap fails with in-tree gmp and without system C++ compiler

[developer at sandoe-acoustics dot co dot uk]

------- Comment #9 from developer at sandoe-acoustics dot co dot uk  2009-08-25 12:06 -------
(In reply to comment #7)
> Use --enable-stage1-languages=c,c++

I believe that this bug also applies to powerpc-apple-darwin8 and
i686-apple-darwin9.
the suggested remedy also works.

This was introduced between 148251 and 151057 (OK a big gap .. but) during
which time I didn't update GMP - so the change is at least in part down to gcc
build process changing.

if it's any clue  /lib/cpp is not a fallback compiler install location for
Darwin - which perhaps implies that the build process has lost its idea of the
target.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40950