buildsystem: eliminate other unecessary sub process usage

config/optimize

@@ -31,7 +31,7 @@ HOST_CPPFLAGS=""
 HOST_CFLAGS="-O2 -Wall -pipe -I$TOOLCHAIN/include"
 HOST_CXXFLAGS="$HOST_CFLAGS"
 HOST_LDFLAGS="-Wl,-rpath,$TOOLCHAIN/lib -L$TOOLCHAIN/lib"
-HOST_LIBDIR="$TOOLCHAIN/lib"
+HOST_INCDIR="$TOOLCHAIN/include /usr/include"
 
 # work around Ubuntu default C*FLAGS 
 # see https://wiki.ubuntu.com/ToolChain/CompilerFlags#A-Wformat_-Wformat-security
@@ -39,35 +39,40 @@ HOST_CFLAGS="$HOST_CFLAGS -Wno-format-security"
 HOST_CXXFLAGS="$HOST_CXXFLAGS -Wno-format-security" 
 
 # add distro specific library dirs
+if [ -z "$HOST_LIBDIR" ]; then
+  HOST_LIBDIR="$TOOLCHAIN/lib"
+
   # ubuntu/debian specific "multiarch support"
-    FAMILY_TRIPLET=$(echo $HOST_NAME | sed -e "s,$(uname -m),$(uname -i),")
-    if [ -d /lib/$FAMILY_TRIPLET ]; then
-      HOST_LIBDIR="$HOST_LIBDIR /lib/$FAMILY_TRIPLET"
-    fi
-    if [ -d /usr/lib/$FAMILY_TRIPLET ]; then
-      HOST_LIBDIR="$HOST_LIBDIR /usr/lib/$FAMILY_TRIPLET"
-    fi
+  MACHINE_HARDWARE_NAME="$(uname -m)"
+  MACHINE_HARDWARE_PLATFORM="$(uname -i)"
+  FAMILY_TRIPLET=${HOST_NAME/${MACHINE_HARDWARE_NAME}/${MACHINE_HARDWARE_PLATFORM}}
+  if [ -d /lib/$FAMILY_TRIPLET ]; then
+    HOST_LIBDIR="$HOST_LIBDIR /lib/$FAMILY_TRIPLET"
+  fi
+  if [ -d /usr/lib/$FAMILY_TRIPLET ]; then
+    HOST_LIBDIR="$HOST_LIBDIR /usr/lib/$FAMILY_TRIPLET"
+  fi
 
   # default multiarch support
-    case "`uname -m`" in
-      i*86)
-        if [ -d /lib32 ]; then
-          HOST_LIBDIR="$HOST_LIBDIR /lib32"
-        fi
-        if [ -d /usr/lib32 ]; then
-          HOST_LIBDIR="$HOST_LIBDIR /usr/lib32"
-        fi
-      ;;
-      x86_64)
-        if [ -d /lib64 ]; then
-          HOST_LIBDIR="$HOST_LIBDIR /lib64"
-        fi
-        if [ -d /usr/lib64 ]; then
-          HOST_LIBDIR="$HOST_LIBDIR /usr/lib64"
-        fi
-      ;;
-    esac
+  case "${MACHINE_HARDWARE_NAME}" in
+    i*86)
+      if [ -d /lib32 ]; then
+        HOST_LIBDIR="$HOST_LIBDIR /lib32"
+      fi
+      if [ -d /usr/lib32 ]; then
+        HOST_LIBDIR="$HOST_LIBDIR /usr/lib32"
+      fi
+    ;;
+    x86_64)
+      if [ -d /lib64 ]; then
+        HOST_LIBDIR="$HOST_LIBDIR /lib64"
+      fi
+      if [ -d /usr/lib64 ]; then
+        HOST_LIBDIR="$HOST_LIBDIR /usr/lib64"
+      fi
+    ;;
+  esac
 
   # default dirs
-    HOST_LIBDIR="$HOST_LIBDIR /lib /usr/lib"
-    HOST_INCDIR="$TOOLCHAIN/include /usr/include"
+  export HOST_LIBDIR="$HOST_LIBDIR /lib /usr/lib"
+fi

config/options

@@ -25,7 +25,7 @@ else
   TARGET_ARCH="$ARCH"
 fi
 
-ROOT=`pwd`
+ROOT="${PWD}"
 DISTRO_DIR="$ROOT/distributions"
 PROJECT_DIR="$ROOT/projects"
 LINUX_DEPENDS="$PROJECT_DIR/$PROJECT/linux/linux.$TARGET_ARCH.conf $PROJECT_DIR/$PROJECT/devices/$DEVICE/linux/linux.$TARGET_ARCH.conf $ROOT/packages/linux/package.mk"
@@ -56,7 +56,7 @@ LINUX_DEPENDS="$PROJECT_DIR/$PROJECT/linux/linux.$TARGET_ARCH.conf $PROJECT_DIR/
 
 # Need to point to your actual cc
 # If you have ccache installed, take care that LOCAL_CC don't point to it
-  LOCAL_CC=`which gcc`
+  [ -z "${LOCAL_CC}" ] && export LOCAL_CC="$(which gcc)"
 
 if [ -z "$LOCAL_CC" ] ; then
   echo "***** Please install gcc *****"
@@ -65,7 +65,7 @@ fi
 
 # Need to point to your actual g++
 # If you have ccache installed, take care that LOCAL_CXX don't point to it
-  LOCAL_CXX=`which g++`
+  [ -z "${LOCAL_CXX}" ] && export LOCAL_CXX="$(which g++)"
 
 # verbose compilation mode (yes/no)
   VERBOSE="yes"

config/path

@@ -16,7 +16,7 @@ set -e
     . config/arch.$TARGET_ARCH
   fi
 
-HOST_NAME=`$LOCAL_CC -dumpmachine`
+[ -z "${HOST_NAME}" ] && export HOST_NAME="$($LOCAL_CC -dumpmachine)"
 TARGET_NAME=$TARGET_GCC_ARCH-libreelec-linux-gnu${TARGET_ABI}
 
 BUILD=$ROOT/$BUILD_BASE.$DISTRONAME-${DEVICE:-$PROJECT}.$TARGET_ARCH-$LIBREELEC_VERSION
@@ -134,7 +134,7 @@ unset LD_LIBRARY_PATH
       echo "$PKG_URL"
       exit 1
     fi
-    PKG_SOURCE_NAME="$(basename "$PKG_URL")"
+    PKG_SOURCE_NAME="${PKG_URL##*/}"
     case $PKG_SOURCE_NAME in
       ${PKG_NAME}-${PKG_VERSION}.*)
         PKG_SOURCE_NAME=$PKG_SOURCE_NAME