Update build instructions for Linux

README.md

@@ -190,6 +190,10 @@ Make sure you've installed the following dependencies:
 - `libc++abi-dev`
 - `ninja-build`
 
+In addition your distribution might require:
+
+- `libxi-dev`
+
 Then invoke `cmake`:
 
 ```
@@ -217,6 +221,13 @@ $ ninja
 
 This will build Filament, its tests and samples, and various host tools.
 
+If you experience link errors you must ensure that you are using `libc++abi` by passing this
+extra parameter to `cmake`:
+
+```
+-DFILAMENT_REQUIRES_CXXABI=true
+```
+
 #### macOS
 
 To compile Filament you must have the most recent version of Xcode installed and you need to

build.sh

@@ -315,12 +315,12 @@ function validate_build_command {
             exit 1
         fi
     fi
-	# Make sure we have Java
+    # Make sure we have Java
     javac_binary=`which javac`
-	if [ "$JAVA_HOME" == "" ] || [ ! "$javac_binary" ]; then
-		echo "Warning: JAVA_HOME is not set, skipping Java projects"
-		ENABLE_JAVA=OFF
-	fi
+    if [ "$JAVA_HOME" == "" ] || [ ! "$javac_binary" ]; then
+        echo "Warning: JAVA_HOME is not set, skipping Java projects"
+        ENABLE_JAVA=OFF
+    fi
     set -e
 }