把ns2.34解压缩之后，sudo ./install
出现的错误：
错误一：安装NS2.34过程中出现如下的错误：
tools/ranvar.cc: In member function ‘virtual double GammaRandomVariable::value()’:
tools/ranvar.cc:219:70: error: cannot call constructor ‘GammaRandomVariable::GammaRandomVariable’ directly
tools/ranvar.cc:219:70: error: for a function-style cast, remove the redundant ‘::GammaRandomVariable’
make: *** [tools/ranvar.o]错误1
Ns make failed!
See http://www.isi.edu/nsnam/ns/ns-problems.html for problems
这是由于gcc版本提高后对类内部函数调用的简化造成的不兼容，解决方法如下：
在ns-allinone-2.34/ ns-2.34/tools文件夹下，找到报错提示中的ranvar.cc文件，打开找到对应的219行删除::GaammaRandomVariable，保存，
即：将219行的
return GammaRandomVariable::GammaRandomVariable(1.0 + alpha_, beta_).value() * pow (u, 1.0 / alpha_);
改为：
return GammaRandomVariable(1.0 + alpha_, beta_).value() * pow (u, 1.0 / alpha_);
然后保存退出，重新安装ns2.
======================================================================================
错误二：
In file included from mac/mac-802_11Ext.cc:66:0:
mac/mac-802_11Ext.h: In member function ‘u_int32_t PHY_MIBExt::getHdrLen11()’:
mac/mac-802_11Ext.h:175:19: error: expected primary-expression before ‘struct’
mac/mac-802_11Ext.h:175:41: error: ‘dh_body’ was not declared in this scope
mac/mac-802_11Ext.h:175:51: error: ‘offsetof’ was not declared in this scope
mac/mac-802_11Ext.h:177:3: warning: control reaches end of non-void function [-Wreturn-type]
make: *** [mac/mac-802_11Ext.o] Error 1
Ns make failed!
下面是网上找得关于本问题的解决方案：
If you get error like:
mac/mac-802_11Ext.h: In member function ‘u_int32_t PHY_MIBExt::getHdrLen11()’:
mac/mac-802_11Ext.h:176:19: error: expected primary-expression before ‘struct’
mac/mac-802_11Ext.h:176:41: error: ‘dh_body’ was not declared in this scope
mac/mac-802_11Ext.h:176:51: error: ‘offsetof’ was not declared in this scope
open that file and add
#include <cstddef>
to the header files.
在ns-allinone-2.34\ns-2.34\mac\mac-802_11Ext.h 文件添加#include <cstddef>
然后重新安装，就OK了。
=============================================================================
错误三：
mobile/nakagami.cc: In member function ‘virtual double Nakagami::Pr(PacketStamp*, PacketStamp*, WirelessPhy*)’:
mobile/nakagami.cc:183:73: error: cannot call constructor ‘ErlangRandomVariable::ErlangRandomVariable’ directly
mobile/nakagami.cc:183:73: error: for a function-style cast, remove the redundant ‘::ErlangRandomVariable’
mobile/nakagami.cc:185:67: error: cannot call constructor ‘GammaRandomVariable::GammaRandomVariable’ directly
mobile/nakagami.cc:185:67: error: for a function-style cast, remove the redundant ‘::GammaRandomVariable’
make: *** [mobile/nakagami.o]错误1
Ns make failed!
See http://www.isi.edu/nsnam/ns/ns-problems.html for problems
解决方法：
在ns-allinone-2.34/ ns-2.34/ mobile文件夹下，找到报错提示中的nakagami.cc文件，打开找到对应的183行删除::ErlangRandomVariable，保存，
即：将183行的
resultPower = ErlangRandomVariable::ErlangRandomVariable(Pr/m, int_m).value();
改为：
resultPower = ErlangRandomVariable(Pr/m, int_m).value();
在ns-allinone-2.34/ ns-2.34/ mobile文件夹下，找到报错提示中的nakagami.cc文件，打开找到对应的185行删除::GammaRandomVariable，保存，
即：将185行的
resultPower = GammaRandomVariable::GammaRandomVariable(m, Pr/m).value();
改为：
resultPower = GammaRandomVariable(m, Pr/m).value();
=============================================================================
错误四：
In file included from linkstate/ls.cc:67:0:
linkstate/ls.h: In instantiation of ‘void LsMap<Key, T>::eraseAll() [with Key = int; T = LsIdSeq]’:
linkstate/ls.cc:396:28: required from here
linkstate/ls.h:137:58: 错误：‘erase’ was not declared in this scope, and no declarations were found by argument-dependent lookup at the point of instantiation [-fpermissive]
void eraseAll() { erase(baseMap::begin(), baseMap::end()); }
^
linkstate/ls.h:137:58: 附注：declarations in dependent base ‘std::map<int, LsIdSeq, std::less<int>, std::allocator<std::pair<const int, LsIdSeq> > >’ are not found by unqualified lookup
linkstate/ls.h:137:58: 附注：use ‘this->erase’ instead
Makefile:93: recipe for target 'linkstate/ls.o' failed
make: *** [linkstate/ls.o] Error 1
解决方法：
Go to ns-allinone-2.35/ns-2.35/linkstate/ b.Now edit ls.h
In line number 137, in place of void eraseAll() { erase(baseMap::begin(), baseMap::end()); }
make it void eraseAll() { this->erase(baseMap::begin(), baseMap::end()); }
=============================================================================
重新在ns目录下键入$ ./install安装，再次出现问题时，仿照解决方法，找到对应的文件和行数，修改即可。至此安装成功。
配置环境：修改home/wang目录下的 .bashrc文件
打开终端：sudo gedit .bashrc
在文件最后输入：
export PATH=$PATH:/home/wang/ns/ns-allinone-2.34/bin:/home/wang/ns/ns-allinone-2.34/tcl8.4.18/unix:/home/wang/ns/ns-allinone-2.34/tk8.4.18/unix
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/wang/ns/ns-allinone-2.34/otcl-1.13:/home/wang/ns/ns-allinone-2.34/lib
export TCL_LIBRARY=$TCL_LIBRARY:/home/wang/ns/ns-alllinone-2.34/tcl8.4.18/library
=======================================================================================================================
终端输入ns之后出现%之后，说明暂时成功了。
运行./validate（貌似在ns-2.34目录下？？）
会出现问题：
解决方法：
1. 网上说是gcc版本过高的问题，我们把gcc版本降为4.4。教程：http://blog.sina.com.cn/s/blog_6cee149d010129bl.html
2. 可能有些包没有安装：（这个存疑，可以安装试试）
sudo apt-get install libx11-dev xorg-dev libxmu-dev libperl4-corelibs-perl
貌似还是没能解决！！！！