syntax error in config script

[tpyro]

I'm having trouble building the agent on an old Solaris 2.6 server. I get a couple of the "xxx.h: present but cannot be compiled" warnings then the whole thing dies with a syntax error:

bash-3.2# ./configure --enable-agent
[snip]
checking resolv.h presence... yes
configure: WARNING: resolv.h: present but cannot be compiled
configure: WARNING: resolv.h: check for missing prerequisite headers?
configure: WARNING: resolv.h: see the Autoconf documentation
configure: WARNING: resolv.h: section "Present But Cannot Be Compiled"
configure: WARNING: resolv.h: proceeding with the preprocessor's result
configure: WARNING: resolv.h: in the future, the compiler will take precedence
checking for resolv.h... yes
[snip]
checking net/if.h presence... yes
configure: WARNING: net/if.h: present but cannot be compiled
configure: WARNING: net/if.h: check for missing prerequisite headers?
configure: WARNING: net/if.h: see the Autoconf documentation
configure: WARNING: net/if.h: section "Present But Cannot Be Compiled"
configure: WARNING: net/if.h: proceeding with the preprocessor's result
configure: WARNING: net/if.h: in the future, the compiler will take precedence
checking for net/if.h... yes
[snip]
checking for getopt_long... no
./configure: line 11130: syntax error near unexpected token `('
./configure: line 11130: ` for ac_var in `(set) 2>&1 | sed -n 's/^\([a-zA-Z_][a-zA-Z0-9_]*\)=.*/\1/p'`; do'
bash-3.2# echo $?
2
bash-3.2#

The log file config.log ends like this:


## ----------- ##
## confdefs.h. ##
## ----------- ##

#define PACKAGE_NAME ""
#define PACKAGE_TARNAME ""
#define PACKAGE_VERSION ""
[snip]
#define HAVE_SNPRINTF 1
#define HAVE_VSNPRINTF 1
#define HAVE_ATOLL 1

configure: exit 258

I've attached the complete config.log. Let me know if there is anything more I can pull from the sever. Thanks!