How to detect that memory over 4G isn't available ?

[Paul Chavent]

Sorry for the lack of information.

I'am under a GNU/Linux, on an X86 platform. The problem is reproductible on an ubuntu 10.4 and on a slackware 13. On the slackware gcc --verbose gives :

Reading specs from /usr/lib/gcc/i486-slackware-linux/4.3.3/specs
Target: i486-slackware-linux
Configured with: ../gcc-4.3.3/configure --prefix=/usr --libdir=/usr/lib --enable-shared --enable-bootstrap --enable-languages=ada,c,c++,fortran,java,objc --enable-threads=posix --enable-checking=release --with-system-zlib --disable-libunwind-exceptions --enable-__cxa_atexit --enable-libssp --with-gnu-ld --verbose --with-arch=i486 --target=i486-slackware-linux --build=i486-slackware-linux --host=i486-slackware-linux
Thread model: posix
gcc version 4.3.3 (GCC)