虚拟机安装了ubuntu server 12.04 64bit服务器，编译Android Boot报错

[szloveubuntu]

前沿：
今天安装了Vmware workstation虚拟机,用虚拟机安装了ubuntu server 12.04 64bit服务器，
进行Android的开发，编译Boot报错。

信息如下：
make: the `-j' option requires a positive integral argument
Usage: make [options] [target] ...
Options:
-b, -m Ignored for compatibility.
-B, --always-make Unconditionally make all targets.
-C DIRECTORY, --directory=DIRECTORY
Change to DIRECTORY before doing anything.
-d Print lots of debugging information.
--debug[=FLAGS] Print various types of debugging information.
-e, --environment-overrides
Environment variables override makefiles.
-f FILE, --file=FILE, --makefile=FILE
Read FILE as a makefile.
-h, --help Print this message and exit.
-i, --ignore-errors Ignore errors from commands.
-I DIRECTORY, --include-dir=DIRECTORY
Search DIRECTORY for included makefiles.
-j [N], --jobs[=N] Allow N jobs at once; infinite jobs with no arg.
-k, --keep-going Keep going when some targets can't be made.
-l [N], --load-average[=N], --max-load[=N]
Don't start multiple jobs unless load is below N.
-L, --check-symlink-times Use the latest mtime between symlinks and target.
-n, --just-print, --dry-run, --recon
Don't actually run any commands; just print them.
-o FILE, --old-file=FILE, --assume-old=FILE
Consider FILE to be very old and don't remake it.
-p, --print-data-base Print make's internal database.
-q, --question Run no commands; exit status says if up to date.
-r, --no-builtin-rules Disable the built-in implicit rules.
-R, --no-builtin-variables Disable the built-in variable settings.
-s, --silent, --quiet Don't echo commands.
-S, --no-keep-going, --stop
Turns off -k.
-t, --touch Touch targets instead of remaking them.
-v, --version Print the version number of make and exit.
-w, --print-directory Print the current directory.
--no-print-directory Turn off -w, even if it was turned on implicitly.
-W FILE, --what-if=FILE, --new-file=FILE, --assume-new=FILE
Consider FILE to be infinitely new.
--warn-undefined-variables Warn when an undefined variable is referenced.

This program built for x86_64-pc-linux-gnu
Report bugs to <[email protected]>
COPY out/u-boot.bin
cp: cannot stat `../u-boot-2011.06/u-boot.bin': No such file or directory
make: *** [out/u-boot.bin] Error 1

我使用过make、make -j 1 、make -j 2、等现象都一模一样。
百思不得其解，请有经验的朋友帮看看问题出在哪里。

[mymathersname]

有个问题想问下，你的虚拟机有几核？内存多少？

If you want to build Ice Cream Sandwich from AOSP(Android Open Source Project), these are the preliminary numbers that you should be looking at,

6GB of download.
25GB disk space to do a single build.
80GB disk space to build all AOSP configs at the same time.
16GB RAM recommended, more preferred, anything less will measurably benefit from using an SSD.
5+ hours of CPU time for a single build, 25+ minutes of wall time, as measured on a workstation (dual-E5620 i.e. 2x quad-core 2.4GHz HT, with 24GB of RAM, no SSD).
Never had I imagined that ICS would require such heavy-duty machines to build. Folks, its time to upgrade your machines !