Hi all, I'm trying to compile graph-tool on a macbook with mac os x v10.4.11, but compilation fails as follows: /opt/local/bin/i386-apple-darwin8.11.1-gcc-4.2.2 -DHAVE_CONFIG_H - I. -I../.. -I. -I.. -I../boost-workaround -DHAVE_CONFIG_H -Wall -I/ opt/local/include/python2.5 -pthread -I/opt/local/include/ boost-1_34_1 -ftemplate-depth-150 -O99 -Wno-unknown-pragmas -MT graph.lo -MD -MP -MF .deps/graph.Tpo -c graph.cc -fno-common -DPIC - o .libs/graph.o graph.cc: In function 'void catch_sig_stop(int)': graph.cc:560: error: 'SIGPWR' was not declared in this scope graph.cc: In member function 'void graph_tool::GraphInterface::InitSignalHandling()': graph.cc:593: error: 'SIGPWR' was not declared in this scope make[3]: *** [graph.lo] Error 1 make[2]: *** [all-recursive] Error 1 make[1]: *** [all-recursive] Error 1 make: *** [all] Error 2 My system is: python v2.5.1 gcc v4.2.2 boost v1.34.1 I'm using the following configure command: sudo ./configure --prefix=/opt/local --with-boost=/opt/local -- disable-visibility CC=/opt/local/bin/i386-apple-darwin8.11.1- gcc-4.2.2 CXX=/opt/local/bin/i386-apple-darwin8.11.1-gcc-4.2.2 PYTHON_VERSION=2.5 LDFLAGS=-L/opt/local/lib/ Any ideas? Thanks, Spiros