I believe commit d67ce1cd31f6ea2e766d5c201ab5430735cbb3b8 broke this.
Old behavior:
Checking for C library nsl... (cached) yes going to make dist: mongodb-sunos5-x86_64-2012-03-23 scons: done reading SConscript files. scons: Building targets ... Install file: "distsrc/GNU-AGPL-3.0" as "mongodb-sunos5-x86_64-2012-03-23/GNU-AGPL-3.0" (etc....)
New, broken:
Checking for C library nsl... (cached) yes scons: done reading SConscript files. scons: Building targets ... generate_buildinfo(["build/buildinfo.cpp"], ['\n#include <string>\n#include <boost/version.hpp>\n\n#include "mongo/util/version.h"\n\nnamespace mongo {\n const char * gitVersion() { return "%(git_version)s"; }\n std::string sysInfo() { return "%(sys_info)s BOOST_LIB_VERSION=" BOOST_LIB_VERSION ; }\n} // namespace mongo\n']) strip -o build/sunos5/64/cc__opt_gcc_gcc44_bin_gcc/cxx__opt_gcc_gcc44_bin_g++/extrapath__opt_local_/release/mongo/stripped/mongodump build/sunos5/64/cc__opt_gcc_gcc44_bin_gcc/cxx__opt_gcc_gcc44_bin_g++/extrapath__opt_local_/release/mongo/mongodump strip: illegal option -- o usage: strip [-lVx] file ...