Josh Reese <jreeseue@xxxxxxxxx> writes: > 13:03@legolas:.+gcc4.7.0/objdir$ make install > g++ -c -DGCC_INCLUDE_DIR=\"/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/local/lib/gcc/x86_64-apple-darwin11.4.0/4.7.0/include\" -DFIXED_INCLUDE_DIR=\"/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/local/lib/gcc/x86_64-apple-darwin11.4.0/4.7.0/include-fixed\" -DGPLUSPLUS_INCLUDE_DIR=\"/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/local/lib/gcc/x86_64-apple-darwin11.4.0/4.7.0/../../../../include/c++/4.7.0\" -DGPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT=0 -DGPLUSPLUS_TOOL_INCLUDE_DIR=\"/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/local/lib/gcc/x86_64-apple-darwin11.4.0/4.7.0/../../../../include/c++/4.7.0/x86_64-apple-darwin11.4.0\" -DGPLUSPLUS_BACKWARD_INCLUDE_DIR=\"/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/local/lib/gcc/x86_64-apple-darwin11.4.0/4.7.0/../../../../include/c++/4.7.0/backward\" -DLOCAL_INCLUDE_DIR=\"/usr/local/include\" -DCROSS_INCLUDE_DIR=\"/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/local/lib/gcc/x86_64-apple-darwin11.4.0/4.7.0/../../../../x86_64-apple-darwin11.4.0/sys-include\" -DTOOL_INCLUDE_DIR=\"/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/local/lib/gcc/x86_64-apple-darwin11.4.0/4.7.0/../../../../x86_64-apple-darwin11.4.0/include\" -DNATIVE_SYSTEM_HEADER_DIR=\"/usr/include\" -DPREFIX=\"/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/local/\" -DSTANDARD_EXEC_PREFIX=\"/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/local/lib/gcc/\" -DBASEVER="\"4.7.0\"" -g -O2 -DIN_GCC -fno-exceptions -fno-rtti -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H -I. -I. -I../../srcdir/gcc -I../../srcdir/gcc/. -I../../srcdir/gcc/../include -I../../srcdir/gcc/../libcpp/include -I/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/objdir/./gmp -I/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/srcdir/gmp -I/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/objdir/./mpfr -I/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/srcdir/mpfr -I/Users/jreese/Documents/school/edinburgh/project/builds/gsc-gcc4.7.0/srcdir/mpc/src -I../../srcdir/gcc/../libdecnumber -I../../srcdir/gcc/../libdecnumber/dpd -I../libdecnumber ../../srcdir/gcc/cppbuiltin.c -o cppbuiltin.o > cc1plus: error: unrecognized command line option "-Wno-narrowing" make install should not normally run the compiler (I assume you ran make before running make install). My first guess would be some sort of timestamp confusion. Ian