unix: use environment variables in build-xproto.sh

Author: indygreg

cpython-unix/build-xproto.sh

@@ -5,18 +5,18 @@
 
 set -ex
 
-cd /build
+ROOT=`pwd`
 
 pkg-config --version
 
-export PATH=/tools/${TOOLCHAIN}/bin:/tools/host/bin:$PATH
-export PKG_CONFIG_PATH=/tools/deps/share/pkgconfig
+export PATH=${TOOLS_PATH}/${TOOLCHAIN}/bin:${TOOLS_PATH}/host/bin:$PATH
+export PKG_CONFIG_PATH=${TOOLS_PATH}/deps/share/pkgconfig
 
 tar -xf xproto-${XPROTO_VERSION}.tar.gz
 pushd xproto-${XPROTO_VERSION}
 
 CFLAGS="-fPIC" ./configure \
     --prefix=/tools/deps
 
-make -j `nproc`
-make -j `nproc` install DESTDIR=/build/out
+make -j ${NUM_CPUS}
+make -j ${NUM_CPUS} install DESTDIR=${ROOT}/out