[ $1 == $2 ] is a bash-only syntax. Must use [ $1 ==$2 ] instead.

Packages/Installation/changes.txt

@@ -6,6 +6,7 @@
 //---------------------------------------------------------------------
 //	actual revision
 //---------------------------------------------------------------------
+GLOB: fix a bashism in install_cgal
 GLOB: QT_MOC is now always added in the master makefile, as it should be.
 GLOB: Removed linkage against Core
 GLOB: added licensing information about Qt widget stuff

Packages/Installation/install_cgal

@@ -4353,7 +4353,7 @@ compiler_choose_menu()
 		while [ $i -lt ${_COMPILER_NUMBER} ]; do
 		    _tmp=`eval "echo '$'_COMPILER_$i"`
 		    _tmp=`eval "echo ${_tmp}"`
-		    if [ "${COMPILER_NAME}" == `compiler_bin ${_tmp}` ]; then
+		    if [ "${COMPILER_NAME}" = `compiler_bin ${_tmp}` ]; then
 			return
 		    fi
 	    	    eval "${_EXPR} ${i} + 1"