error installing on Linux Mint 13

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It looks like when I try to install from source on Linux Mint 13 that it doesn't recognise gcc.

I am running this in virtualbox on Windows Vista. The virtual machine has 2gb of ram, a 15 gb hard disk and a new install of linux mint 13 cinnamon.

The first part of the logfile says: Installing GCC because a Fortran compiler is missing. * ALL ENVIRONMENT VARIABLES BEFORE BUILD: *

the last part of the logfile is:

/home/ian/Documents/sage-5.0.1/spkg/build/gcc-4.6.3/gcc-build/./gcc/nm -pg  _muldi3_s.o _negdi2_s.o _lshrdi3_s.o _ashldi3_s.o _ashrdi3_s.o _cmpdi2_s.o _ucmpdi2_s.o _clear_cache_s.o _enable_execute_stack_s.o _trampoline_s.o __main_s.o _absvsi2_s.o _absvdi2_s.o _addvsi3_s.o _addvdi3_s.o _subvsi3_s.o _subvdi3_s.o _mulvsi3_s.o _mulvdi3_s.o _negvsi2_s.o _negvdi2_s.o _ctors_s.o _ffssi2_s.o _ffsdi2_s.o _clz_s.o _clzsi2_s.o _clzdi2_s.o _ctzsi2_s.o _ctzdi2_s.o _popcount_tab_s.o _popcountsi2_s.o _popcountdi2_s.o _paritysi2_s.o _paritydi2_s.o _powisf2_s.o _powidf2_s.o _powixf2_s.o _mulsc3_s.o _muldc3_s.o _mulxc3_s.o _divsc3_s.o _divdc3_s.o _divxc3_s.o _bswapsi2_s.o _bswapdi2_s.o _fixunssfsi_s.o _fixunsdfsi_s.o _fixunsxfsi_s.o _fixsfdi_s.o _fixdfdi_s.o _fixxfdi_s.o _fixunssfdi_s.o _fixunsdfdi_s.o _fixunsxfdi_s.o _floatdisf_s.o _floatdidf_s.o _floatdixf_s.o _floatundisf_s.o _floatundidf_s.o _floatundixf_s.o _divdi3_s.o _moddi3_s.o _udivdi3_s.o _umoddi3_s.o _udiv_w_sdiv_s.o _udivmoddi4_s.o addtf3_s.o divtf3_s.o multf3_s.o negtf2_s.o subtf3_s.o unordtf2_s.o fixtfsi_s.o fixunstfsi_s.o floatsitf_s.o floatunsitf_s.o fixtfdi_s.o fixunstfdi_s.o floatditf_s.o floatunditf_s.o fixtfti_s.o fixunstfti_s.o floattitf_s.o floatuntitf_s.o extendsftf2_s.o extenddftf2_s.o extendxftf2_s.o trunctfsf2_s.o trunctfdf2_s.o trunctfxf2_s.o getf2_s.o letf2_s.o eqtf2_s.o _divtc3_s.o _multc3_s.o _powitf2_s.o unwind-dw2_s.o unwind-dw2-fde-glibc_s.o unwind-sjlj_s.o gthr-gnat_s.o unwind-c_s.o emutls_s.o; echo %%; \
      cat ../../../src/libgcc/../gcc/libgcc-std.ver ../../../src/libgcc/../gcc/config/i386/libgcc-glibc.ver  \
        | sed -e '/^[   ]*#/d' \
          -e 's/^%\(if\|else\|elif\|endif\|define\)/#\1/' \
        | /home/ian/Documents/sage-5.0.1/spkg/build/gcc-4.6.3/gcc-build/./gcc/xgcc -B/home/ian/Documents/sage-5.0.1/spkg/build/gcc-4.6.3/gcc-build/./gcc/ -B/home/ian/Documents/sage-5.0.1/local/x86_64-unknown-linux-gnu/bin/ -B/home/ian/Documents/sage-5.0.1/local/x86_64-unknown-linux-gnu/lib/ -isystem /home/ian/Documents/sage-5.0.1/local/x86_64-unknown-linux-gnu/include -isystem /home/ian/Documents/sage-5.0.1/local/x86_64-unknown-linux-gnu/sys-include    -g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem ./include  -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -fno-stack-protector   -I. -I. -I../.././gcc -I../../../src/libgcc -I../../../src/libgcc/. -I../../../src/libgcc/../gcc -I../../../src/libgcc/../include -I../../../src/libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS  -DUSE_TLS -E -xassembler-with-cpp -; \
    } | gawk -f ../../../src/libgcc/../gcc/mkmap-symver.awk   > tmp-libgcc.map
mv tmp-libgcc.map libgcc.map
# @multilib_flags@ is still needed because this may use
# /home/ian/Documents/sage-5.0.1/spkg/build/gcc-4.6.3/gcc-build/./gcc/xgcc -B/home/ian/Documents/sage-5.0.1/spkg/build/gcc-4.6.3/gcc-build/./gcc/ -B/home/ian/Documents/sage-5.0.1/local/x86_64-unknown-linux-gnu/bin/ -B/home ...