Allow setting the project name via the PROJECT environment variable

configs/preCfg.sh

@@ -1,12 +1,15 @@
 #!/bin/sh
 
 if [[ "$1" == "" ]] ; then
+    if [[ "$PROJECT" == "" ]] ; then
         echo "Please specify the project name!"
-	exit 0
+        exit 1
+    fi
+    P=$PROJECT
+else
+    P=$1
 fi
 
-P=$1
-
 echo "P=$P"
 
 if [ ! -e $TOPDIR/configs/$P/platform.defconfig ] || [ ! -e $TOPDIR/configs/$P/project.defconfig ] ; then
@@ -16,6 +19,7 @@ else
     echo "merge $TOPDIR/configs/$P/platform.defconfig and $TOPDIR/configs/$P/project.defconfig to .config!"
     cat $TOPDIR/configs/$P/platform.defconfig $TOPDIR/configs/$P/project.defconfig > $TOPDIR/.config
 fi
+
 if [ -e $TOPDIR/configs/$P/external_toolchain.defconfig ] ; then
     echo "merge $TOPDIR/configs/$P/external_toolchain.defconfig to .config!"
     cat $TOPDIR/configs/$P/external_toolchain.defconfig >> $TOPDIR/.config
@@ -27,7 +31,6 @@ if [ -e $TOPDIR/configs/$P/external_toolchain.defconfig ] ; then
     fi
 fi
 
-
 if [[ "$P" == "ipq807x" ]] ; then
     echo "QCA PLATFORM, use right version."
     rm -rf $TOPDIR/include $TOPDIR/scripts