NO_TOOLCHAIN really working?

Dear all,

I'm currently building -current for an embedded system and have the following 
line in my make.conf:
NO_TOOLCHAIN=yes

Why do I see those lines while make buildworld?

cc -Os -pipe -DIN_GCC -DHAVE_CONFIG_H 
-DPREFIX=\"/usr/soekris/usr/src/i386/usr\" 
-I/usr/soekris/usr/src/i386/usr/src/gnu/usr.bin/cc/cc_int/../cc_tools 
-I/usr/src/gnu/usr.bin/cc/cc_int/../cc_tools 
-I/usr/src/gnu/usr.bin/cc/cc_int/../../../../contrib/gcc 
-I/usr/src/gnu/usr.bin/cc/cc_int/../../../../contrib/gcc/config 
-DHAVE_CONFIG_H -DTARGET_NAME=\"i386-undermydesk-freebsd\" -DIN_GCC  
-I/usr/soekris/usr/src/i386/legacy/usr/include 
-c /usr/src/contrib/gcc/combine.c
or
cc -Os -pipe -DIN_GCC -DHAVE_CONFIG_H 
-DPREFIX=\"/usr/soekris/usr/src/i386/usr\" 
-I/usr/soekris/usr/src/i386/usr/src/gnu/usr.bin/cc/cc_int/../cc_tools 
-I/usr/src/gnu/usr.bin/cc/cc_int/../cc_tools 
-I/usr/src/gnu/usr.bin/cc/cc_int/../../../../contrib/gcc 
-I/usr/src/gnu/usr.bin/cc/cc_int/../../../../contrib/gcc/config 
-DHAVE_CONFIG_H -DTARGET_NAME=\"i386-undermydesk-freebsd\" -DIN_GCC  
-I/usr/soekris/usr/src/i386/legacy/usr/include 
-c /usr/src/contrib/gcc/simplify-rtx.c

And what is the include tree good for if I don't want to have gcc at all?

Thanks,

-Harry