hecking how to run the C preprocessor... gcc -E
checking for g++... no
checking for c++... no
checking for gpp... no
checking for aCC... no
checking for CC... no
checking for cxx... no
checking for cc++... no
checking for cl.exe... no
checking for FCC... no
checking for KCC... no
checking for RCC... no
checking for xlC_r... no
checking for xlC... no
checking whether we are using the GNU C++ compiler... no
checking whether g++ accepts -g... no
checking dependency style of g++... none
checking for gfortran... no
checking for g95... no
checking for xlf95... no
checking for f95... no
checking for fort... no
checking for ifort... no
checking for ifc... no
checking for efc... no
checking for pgfortran... no
checking for pgf95... no
checking for lf95... no
checking for ftn... no
checking for xlf90... no
checking for f90... no
checking for pgf90... no
checking for pghpf... no
checking for epcf90... no
checking for g77... no
checking for xlf... no
checking for f77... no
checking for frt... no
checking for pgf77... no
checking for cf77... no
checking for fort77... no
checking for fl32... no
checking for af77... no
checking whether we are using the GNU Fortran compiler... no
checking whether  accepts -g... no
checking for m4... no
configure: Sorry, the 'm4' command must be in the path to build Sage
configure: On some systems it can be found in /usr/ccs/bin
configure: See also http://www.gnu.org/software/m4/
configure: error: Exiting, as the macro processor 'm4' can not be found.
You do not have all of the prerequisites needed to build Sage
from source.  See the errors above.
make[1]: *** [installed/prereq-1.0] Error 1
make[1]: Leaving directory `/home/andrew/Downloads/sage-5.1/spkg'