compilation failure on centos 6

Hi,

I am getting a compilation failure on Centos 6. It seems -lX11 will solve
it, but I am not sure where to change. Please advise.
Neeraj
output log :
============
(12/18) Building module tail_build
=============
Entering /data2/work/sid0/dev/builddir/libreoffice-4.0.0.3/tail_build/prj

[build LNK] Executable/oosplash
/data2/work/sid0/dev/builddir/libreoffice-4.0.0.3/workdir/
unxlngx6.pro/CObject/desktop/unx/source/splashx.o: In function
`create_pixmap':
splashx.c:(.text+0x57e): undefined reference to `XCreatePixmap'
splashx.c:(.text+0x5af): undefined reference to `XCreateGC'

-- collect2: ld returned 1 exit status
make[2]: *** [/data2/work/sid0/dev/builddir/libreoffice-4.0.0.3/workdir/
unxlngx6.pro/LinkTarget/Executable/oosplash] Error 1

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