[igraph] Installing igraph 4.5 in R on Solaris 5.10 i386

[uxzmdlj02]

Hello,
Trying to install igraph in R via ssh on a Solaris 5.10 i386 machine,  
I keep getting an error. Here's the last bit of output:


/opt/SUNWspro/bin/CC -I/opt/sscs/lib/R/include -I/opt/sscs/lib/R/ 
include  -I/opt/sscs/include -I/usr/sfw/include -I/opt/sfw/include    - 
KPIC  -xO3 -c pottsmodel_2.cpp -o pottsmodel_2.o
"error.h", line 278: Warning: Identifier expected instead of "}".
"pottsmodel_2.cpp", line 579: Warning: num_of_nodes hides  
PottsModel::num_of_nodes.
"pottsmodel_2.cpp", line 754: Warning: num_of_nodes hides  
PottsModel::num_of_nodes.
"pottsmodel_2.cpp", line 1211: Error: Overloading ambiguity between  
"std::log(double)" and "std::log(long double)".
"pottsmodel_2.cpp", line 1211: Error: Overloading ambiguity between  
"std::log(double)" and "std::log(long double)".
"pottsmodel_2.cpp", line 1211: Error: Overloading ambiguity between  
"std::log(double)" and "std::log(long double)".
"pottsmodel_2.cpp", line 1215: Error: Overloading ambiguity between  
"std::log(double)" and "std::log(long double)".
"pottsmodel_2.cpp", line 1218: Error: Overloading ambiguity between  
"std::log(double)" and "std::log(long double)".
"pottsmodel_2.cpp", line 1219: Error: Overloading ambiguity between  
"std::log(double)" and "std::log(long double)".
"pottsmodel_2.cpp", line 1220: Error: Overloading ambiguity between  
"std::log(double)" and "std::log(long double)".
7 Error(s) and 3 Warning(s) detected.
*** Error code 7
make: Fatal error: Command failed for target `pottsmodel_2.o'
chmod: WARNING: can't access /mnt/ide0/home/mcmahan/R/i386-pc- 
solaris2.10-library/2.5/igraph/libs/*
ERROR: compilation failed for package 'igraph'
** Removing '/mnt/ide0/home/mcmahan/R/i386-pc-solaris2.10-library/2.5/ 
igraph'

The downloaded packages are in
        /tmp/RtmpDAzVRk/downloaded_packages
Warning messages:
1: installation of package 'igraph' had non-zero exit status in:  
install.packages("igraph")
2: cannot create HTML package index in:  
tools:::unix.packages.html(.Library)



I can install other packages fine, so I'm not sure what's going on.  
Any thoughts?
Thanks,
Peter