I have an x86-64 system running Windows 7 Home Premium with Mingw. Just tried to build the latest system I downloaded with git: git clone https://github.com/feeley/gambit.git cd gambit There were no errors with: ./configure make make bootstrap make bootclean This is what happened when I ran make: sh-3.1$ make rm -f gsc-boot cp gsc-boot.unix gsc-boot chmod +x gsc-boot if test ".bat" != ""; then \ rm -f gsc-boot.bat; \ cp gsc-boot.bat.windows gsc-boot.bat; \ fi making all in include make[1]: Entering directory `/c/Users/Steve/Desktop/gambit/include' major=`echo v4.6.6 | sed -e "s/v//g" -e "s/\.[^.]*\.[^.]*//g"`; \ minor=`echo v4.6.6 | sed -e "s/v[^.]*\.//g" -e "s/\.[^.]*//g"`; \ revision=`echo v4.6.6 | sed -e "s/v[^.]*\.[^.]*\.//g" -e "s///g"`; \ version_num=`eval expr "\( 100000 \\* $major \) + \( 1000 \\* $minor \) + $revision"`; \ echo "#error \"The version indicated in ___VERSION is not supported by gambit.h\"" > gambit-not$version_num.h; \ echo "#error \"You are probably compiling C code generated by a Gambit compiler earlier or later than v4.6.6\"" >> gambit-not$version_num.h; \ echo "#error \"___VERSION will be set to $version_num to reduce other errors\"" >> gambit-not$version_num.h; \ echo "#undef ___VERSION" >> gambit-not$version_num.h; \ echo "#define ___VERSION $version_num" >> gambit-not$version_num.h; \ echo "#include \"gambit.h\"" >> gambit-not$version_num.h make[1]: Leaving directory `/c/Users/Steve/Desktop/gambit/include' making all in lib make[1]: Entering directory `/c/Users/Steve/Desktop/gambit/lib' ../gsc-boot -:~~bin=../bin,~~lib=../lib,~~include=../include -f -c -check _io.scm gcc -D_WINDOWS -Wno-unused -Wno-write-strings -O2 -fno-math-errno -fschedule-insns2 -fno-trapping-math -fno-strict-aliasing -fwrapv -fno-keep-inline-dllexport -fmodulo-sched -freschedule-modulo-sched uled-loops -fno-common -mieee-fp -I"../include" -c -o "_io.o" -I. -DHAVE_CONFIG_H -D___GAMBCDIR="\"/usr/local/Gambit-C\"" -D___SYS_TYPE_CPU="\"i686\"" -D___SYS_TYPE_VENDOR="\"pc\"" -D___SYS_TYPE_OS= "\"mingw32\"" -D___CONFIGURE_COMMAND="\"./configure '--enable-single-host' '--enable-c-opt' '--enable-gcc-opts'"\" -D___OBJ_EXTENSION="\".o\"" -D___EXE_EXTENSION="\".exe\"" -D___BAT_EXTENSION="\".bat\ "" -D___PRIMAL _io.c -D___LIBRARY gcc.exe: error: _io.c: No such file or directory gcc.exe: fatal error: no input files compilation terminated. make[1]: *** [_io.o] Error 1 make[1]: Leaving directory `/c/Users/Steve/Desktop/gambit/lib' make: *** [all-recursive] Error 1 sh-3.1$ Any ideas what went wrong? Steve