[Openswan Users] openswan installation problem

[yu chen]

Dear all
   my name is Kelsen, i got openswan installation problem, see below:

[root at freeiris2 openswan-2.4.12]# make programs
make[1]: Entering directory `/usr/local/src/openswan-2.4.12/doc'
cp /usr/local/src/openswan-2.4.12/doc/src/index.html index.html
make[1]: Leaving directory `/usr/local/src/openswan-2.4.12/doc'
make[1]: Entering directory `/usr/local/src/openswan-2.4.12/lib'
make[2]: Entering directory `/usr/local/src/openswan-2.4.12/lib/libopenswan'
cc -I. -I/usr/local/src/openswan-2.4.12/linux/net/ipsec -I/usr/local/src/openswan-2.4.12/linux/include -I/usr/local/src/openswan-2.4.12 -DDEBUG -DWITH_UDPFROMTO -DHAVE_IP_PKTINFO -I/usr/local/src/openswan-2.4.12/include -g -O3 -DDISABLE_UDP_CHECKSUM -Wall -Wpointer-arith -Wcast-qual -Wstrict-prototypes -Wbad-function-cast  -DNAT_TRAVERSAL   -c -o addrtoa.o /usr/local/src/openswan-2.4.12/linux/net/ipsec/addrtoa.c
make[2]: cc: Command not found
make[2]: *** [addrtoa.o] Error 127
make[2]: Leaving directory `/usr/local/src/openswan-2.4.12/lib/libopenswan'
make[1]: *** [programs] Error 1
make[1]: Leaving directory `/usr/local/src/openswan-2.4.12/lib'
make: *** [programs] Error 1

please advise me what i have to do with this issue
i am using Centos 5.3, kannel: 

Linux version 2.6.18-164.6.1.el5 (mockbuild at builder16.centos.org) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-46)) #1 SMP Tue Nov 3 16:18:27 EST 2009

thank you very much 


kind regards

kelsen 


      
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