quoting variables in string comparison in configure

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@2502 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8

src/configure

@@ -106,7 +106,7 @@ do
   --omp-libdir=*)
   OMPLIBDIR=`read_dirname $1`; shift ;;
   --mathlib=*)
-  MATHLIB=`read_dirname $1`; shift ;;
+  MATHLIB=`expr "X$1" : '[^=]*=\(.*\)'`; shift ;;
   --cudatk-dir=*)
   CUDATKDIR=`read_dirname $1`; shift ;; #CUDA is used in src/cudamatrix and src/nnet{,bin} only
   *)  echo "Unknown argument: $1, exiting"; usage; exit 1 ;;
@@ -497,16 +497,16 @@ if [ "`uname`" == "Darwin"  ]; then
   # posix_memalign and gcc -rdynamic options not present on OS X 10.5.*
   osx_ver=`sw_vers | grep ProductVersion | awk '{print $2}' | sed -e 's?\.[^.]*$??'`
   echo "Configuring for OS X version $osx_ver ..."
-  if [ $osx_ver == "10.5" ]; then
+  if [ "$osx_ver" == "10.5" ]; then
     check_exists makefiles/darwin_10_5.mk
     cat makefiles/darwin_10_5.mk >> kaldi.mk 
-  elif [ $osx_ver == "10.6" ]; then
+  elif [ "$osx_ver" == "10.6" ]; then
     check_exists makefiles/darwin_10_6.mk
     cat makefiles/darwin_10_6.mk >> kaldi.mk 
-  elif [ $osx_ver == "10.7" ]; then
+  elif [ "$osx_ver" == "10.7" ]; then
     check_exists makefiles/darwin_10_7.mk
     cat makefiles/darwin_10_7.mk >> kaldi.mk 
-  elif [ $osx_ver == "10.8" ]; then
+  elif [ "$osx_ver" == "10.8" ]; then
     check_exists makefiles/darwin_10_8.mk
     cat makefiles/darwin_10_8.mk >> kaldi.mk 
   else 
@@ -537,7 +537,7 @@ if [ "`uname`" == "Linux" ]; then
   echo FSTROOT = $FSTROOT >> kaldi.mk
 
   echo "On Linux: Checking for linear algebra header files ..."
-  if [ $MATHLIB == "ATLAS" ]; then
+  if [ "$MATHLIB" == "ATLAS" ]; then
     if [ ! -f $ATLASROOT/include/cblas.h ] || [ ! -f $ATLASROOT/include/clapack.h ] ; then
       failure "Could not find required header files cblas.h or clapack.h in ATLAS dir '$ATLASROOT/include'"
     fi
@@ -560,13 +560,13 @@ if [ "`uname`" == "Linux" ]; then
       linux_configure_debian_ubuntu || \
       linux_atlas_failure "Failed to configure ATLAS lbiraries";
 
-  elif [ $MATHLIB == "MKL" ]; then
+  elif [ "$MATHLIB" == "MKL" ]; then
     if [ "`uname -m`" != "x86_64" ]; then
       failure "MKL on Linux only supported for Intel(R) 64 architecture (x86_64). 
       See makefiles/linux_64_mkl.mk to manually configure for other platforms."
     fi
     
-    if  is_set $MKLROOT -a ! is_set $MKLLIBDIR; then
+    if  is_set "$MKLROOT" -a ! is_set "$MKLLIBDIR"; then
       echo -n "Configuring MKL library directory: "
       MKLLIBDIR=`linux_configure_mkllibdir $MKLROOT`
       if [ $? -ne 0 ]; then
@@ -620,14 +620,14 @@ if [ "`uname`" == "Linux" ]; then
     echo "Successfully configured for Linux with MKL libs from $MKLROOT"
     exit 0;
 
-  elif [ $MATHLIB == "CLAPACK" ]; then
-    if [ -z $CLAPACKROOT ]; then
+  elif [ "$MATHLIB" == "CLAPACK" ]; then
+    if [ -z "$CLAPACKROOT" ]; then
       failure "Must specify the location of CLAPACK with --clapack-root option (and it must exist)"
     fi
     if [ ! -f ../tools/CLAPACK/clapack.h ]; then
       failure could not find file ../tools/CLAPACK/clapack.h
     fi
-    if [ ! -d $CLAPACKROOT ]; then
+    if [ ! -d "$CLAPACKROOT" ]; then
       failure "The directory $CLAPACKROOT does not exist"
     fi
     # Also check for cblas.h and f2c.h
@@ -640,9 +640,9 @@ if [ "`uname`" == "Linux" ]; then
     $use_cuda && linux_configure_cuda
     echo "Successfully configured for Linux with CLAPACK libs from $CLAPACKROOT"
     exit 0
-  elif [ $MATHLIB == "OPENBLAS" ]; then
-    OPENBLASROOT=`rel2abs $OPENBLASROOT`
-    if [ -z $OPENBLASROOT ]; then
+  elif [ "$MATHLIB" == "OPENBLAS" ]; then
+    OPENBLASROOT=`rel2abs "$OPENBLASROOT"`
+    if [ -z "$OPENBLASROOT" ]; then
       failure "Must specify the location of OPENBLAS with --openblas-root option (and it must exist)"
     fi
     if [ ! -f $OPENBLASROOT/lib/libopenblas.so ]; then