preprocessor/2928: out of memory during macros expansion

[yann dot droneaud at iupmime dot univ-lemans dot fr]

>Number:         2928
>Category:       preprocessor
>Synopsis:       out of memory during macros expansion
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu May 24 12:56:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Yann Droneaud
>Release:        gcc >= 2.95.2
>Organization:
>Environment:
i586-pc-linux-gnu
linux-2.4.3
glibc-2.2.3
gcc-2.95.3

>Description:

compile the code with flag -O2 (so using optimized string macro from glibc in bits/string2.h)

lead to 

"cpp0: Memory exhausted." with gcc-2.95.3

with gcc-3.0 snapshot:
    Reading specs from /usr/local/bin/../lib/gcc-lib/i386-pc-linux-gnu/3.0/specs
    Configured with: ../configure --prefix=/tmp/gcc-20010524-root/usr/local --enable-shared --enable-threads --disable-checking i386-pc-linux-gnu : (reconfigured) 
    Thread model: posix
    gcc version 3.0 20010524 (prerelease)
     /usr/local/bin/../lib/gcc-lib/i386-pc-linux-gnu/3.0/cc1 -lang-c -v -iprefix /usr/local/bin/../lib/gcc-lib/i386-pc-linux-gnu/3.0/ -D__GNUC__=3 -D__GNUC_MINOR__=0 -D__GNUC_PATCHLEVEL__=0 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__OPTIMIZE__ -D__STDC_HOSTED__=1 -W -Wall -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i386__ /usr/tmp/@6807.7.c -quiet -dumpbase @6807.7.c -O2 -W -Wall -version -o /tmp/ccbLIkCc.s
    GNU CPP version 3.0 20010524 (prerelease) (cpplib) (i386 Linux/ELF)
    GNU C version 3.0 20010524 (prerelease) (i386-pc-linux-gnu)
            compiled by GNU C version 3.0 20010524 (prerelease).
    ignoring nonexistent directory "/usr/local/i386-pc-linux-gnu/include"
    ignoring nonexistent directory "/tmp/gcc-20010524-root/usr/local/lib/gcc-lib/i386-pc-linux-gnu/3.0/include"
    ignoring nonexistent directory "/tmp/gcc-20010524-root/usr/local/lib/gcc-lib/i386-pc-linux-gnu/3.0/../../../../i386-pc-linux-gnu/include"
    #include "..." search starts here:
    #include <...> search starts here:
     /usr/local/lib/gcc-lib/i386-pc-linux-gnu/3.0/include
     /usr/local/include
     /usr/include
    End of search list.

    cc1: Cannot allocate 50331648 bytes after allocating 650952 bytes
>How-To-Repeat:
compile the source with -O2 on a glibc system
(__OPTIMIZE__ defined)
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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