[GRASS-user] grass compilation error on windows

[kameswari devi]

hello,
i want to compile grass 6.4.4 on win32 system, i tried to do it using
mingw but i got this error log:


Sun Oct 26 20:31:42 IST 2014: STARTING remove old logs
Sun Oct 26 20:31:42 IST 2014: FINISHED remove old logs AFTER 0s
Sun Oct 26 20:31:42 IST 2014: STARTING configure
checking host system type... i686-pc-mingw32
checking for gcc... gcc
checking whether the C compiler (gcc  ) works... yes
checking whether the C compiler (gcc  ) is a cross-compiler... no
checking whether we are using GNU C... yes
checking whether gcc accepts -g... yes
checking for Cygwin environment... no
checking for mingw32 environment... yes
checking for executable suffix... .exe
checking for full floating-point support... yes
checking for pwd... /bin/pwd
checking for source directory... /c/OSGeo4W/usr/src/grass_6.4
checking for build directory... /c/OSGeo4W/usr/src/grass_6.4
checking for svnversion... no
checking for MacOSX App... no
checking for MacOSX architectures... no
checking for MacOSX SDK... no
checking how to build libraries... shared
checking for ranlib... ranlib
checking how to run the C preprocessor... gcc -E
checking if 64bit support is requested... no
checking if 64bit Sparc VIS support is requested... no
checking system version (for dynamic loading)... MINGW32_NT-6.1-1.0.11(0.46/3/2)
checking for dlopen in -ldl... no
checking for ar... ar
checking for additional include dirs... /c/OSGeo4W/include
/c/OSGeo4W/apps/msys/include
checking for additional library dirs... /c/OSGeo4W/lib
/c/OSGeo4W/apps/msys/lib
/c/OSGeo4W/usr/src/grass_6.4/mswindows/osgeo4w/lib
checking for a BSD compatible install... /bin/install -c
checking for flex... lex
checking for yywrap in -ll... no
checking for lex... no
configure: error: *** Unable to locate lex.


please suggest me what to do. thank you

-- 
Regards
kams