Merge in Brian's massive build system cleanup effort.

Conflicts:
	.gitignore
	aos/build/build.sh
diff --git a/aos/build/build.sh b/aos/build/build.sh
index e0ff434..c7a4bc4 100755
--- a/aos/build/build.sh
+++ b/aos/build/build.sh
@@ -21,37 +21,37 @@
 [ "${DEBUG}" == "yes" -o "${DEBUG}" == "no" ] || ( echo Debug "(${DEBUG})" must be '"yes" or "no"'. ; exit 1 )
 
 AOS=`dirname $0`/..
-NINJA_RELEASE=v1.4.0
-NINJA_DIR=${AOS}/externals/ninja-${NINJA_RELEASE}
-NINJA=${NINJA_DIR}/ninja
-# From chromium@154360:trunk/src/DEPS.
-GYP_REVISION=1738
-GYP_DIR=${AOS}/externals/gyp-${GYP_REVISION}
-GYP=${GYP_DIR}/gyp
 
-OUTDIR=${AOS}/../out_${OUT_NAME}
-BUILD_NINJA=${OUTDIR}/Default/build.ninja
+OUTDIR=${AOS}/../output/${OUT_NAME}
+BUILD_NINJA=${OUTDIR}/build.ninja
 
-[ -d ${NINJA_DIR} ] || git clone --branch ${NINJA_RELEASE} https://github.com/martine/ninja.git ${NINJA_DIR}
-[ -x ${NINJA} ] || ${NINJA_DIR}/bootstrap.py
-[ -d ${GYP_DIR} ] || ( svn co http://gyp.googlecode.com/svn/trunk -r ${GYP_REVISION} ${GYP_DIR} && patch -p1 -d ${GYP_DIR} < ${AOS}/externals/gyp.patch )
 ${AOS}/build/download_externals.sh
+. $(dirname $0)/tools_config
 
 # The exciting quoting is so that it ends up with -DWHATEVER='"'`a command`'"'.
 # The '"' at either end is so that it creates a string constant when expanded
 #   in the C/C++ code.
 COMMONFLAGS='-DLOG_SOURCENAME='"'\"'"'`basename $in`'"'\"' "
-if [ ${PLATFORM} == crio ]; then
-  COMMONFLAGS+='-DAOS_INITNAME=aos_init_function_`readlink -f $out | sed \"s/[\/.]/_/g\"` '
-fi
 
 if [[ "${ACTION}" != "clean" && ( ! -d ${OUTDIR} || -n \
   			"`find ${AOS}/.. -newer ${BUILD_NINJA} \( -name '*.gyp' -or -name '*.gypi' \)`" ) ]]; then
-  ${GYP} \
-    --check --depth=${AOS}/.. --no-circular-check -f ninja \
-    -I${AOS}/build/aos.gypi -Goutput_dir=out_${OUT_NAME} \
-    -DOS=${PLATFORM} -DWIND_BASE=${WIND_BASE} -DDEBUG=${DEBUG} \
-    ${GYP_MAIN}
+  # This is a gyp "file" that we pipe into gyp so that it will put the output
+  # in a directory named what we want where we want it.
+  GYP_INCLUDE=$(cat <<END
+{
+  'target_defaults': {
+    'configurations': {
+	  '${PLATFORM}': {}
+    }
+  }
+}
+END
+)
+  echo "${GYP_INCLUDE}" | ${GYP} \
+      --check --depth=${AOS}/.. --no-circular-check -f ninja \
+      -I${AOS}/build/aos.gypi -I/dev/stdin -Goutput_dir=output \
+      -DOS=${PLATFORM} -DWIND_BASE=${WIND_BASE} -DDEBUG=${DEBUG} \
+      ${GYP_MAIN}
   # Have to substitute "command = $compiler" so that it doesn't try to
   #   substitute them in the linker commands, where it doesn't work.
   sed -i "s:command = \$cc:\\0 ${COMMONFLAGS}:g ; \
@@ -70,28 +70,28 @@
   else
     NINJA_ACTION=
   fi
-  ${NINJA} -C ${OUTDIR}/Default ${NINJA_ACTION} "$@"
+  ${NINJA} -C ${OUTDIR} ${NINJA_ACTION} "$@"
   if [[ ${ACTION} == deploy || ${ACTION} == redeploy ]]; then
     [[ ${PLATFORM} =~ .*atom ]] && \
       rsync --progress -c -r \
-        ${OUTDIR}/Default/outputs/* \
+        ${OUTDIR}/outputs/* \
         driver@`${AOS}/build/get_ip fitpc`:/home/driver/robot_code/bin
 	  ssh driver@`${AOS}/build/get_ip fitpc` "sync; sync; sync"
     [ ${PLATFORM} == crio ] && \
       ncftpput `${AOS}/build/get_ip robot` / \
-      ${OUTDIR}/Default/lib/FRC_UserProgram.out
+      ${OUTDIR}/lib/FRC_UserProgram.out
   fi
   if [[ ${ACTION} == redeploy ]]; then
     if [[ ${PLATFORM} != crio ]]; then
       echo "Platform ${PLATFORM} does not support redeploy." 1>&2
       exit 1
     fi
-    ${OUTDIR}/../out_atom/Default/outputs/netconsole <<"END"
+    ${OUTDIR}/../out_atom/outputs/netconsole <<"END"
 unld "FRC_UserProgram.out"
 ld < FRC_UserProgram.out
 END
   fi
   if [[ ${ACTION} == tests ]]; then
-    find ${OUTDIR}/Default/tests -executable -exec {} \;
+    find ${OUTDIR}/tests -executable -exec {} \;
   fi
 fi