diff --git a/README.md b/README.md
index 1092f11f3..a8c22f7c2 100644
--- a/README.md
+++ b/README.md
@@ -4,19 +4,26 @@
 
 ## Build prerequisite
 
-Linphone for iPhone depends on liblinphone SDK. This SDK is generated from makefiles and shell scripts. Before building Linphone on iPhone, please read and execute [liblinphone README](submodule/linphone/README.macos.md).
+Linphone for iPhone depends on liblinphone SDK. This SDK is generated from makefiles and shell scripts.
 
-You will NOT be able to build the SDK if you did not read liblinphone README first!
+* Xcode (download from apple or using appstore application)
+* [Java SE](http://www.oracle.com/technetwork/java/javase/downloads/index.html) or openJDK
+ This is required to generate a C sourcefile from SIP grammar using [antlr3](http://www.antlr3.org/) generator.
+* [HomeBrew](http://brew.sh) or [Macports](http://www.macports.org/).
 
-### Additional dependencies
+
+### Install dependencies
 
 * Using HomeBrew:
 
-        brew install imagemagick yasm nasm
+        brew install autoconf automake pkg-config doxygen java nasm gettext wget yasm optipng imagemagick coreutils intltool
+        # antlr3.2 is faster than default homebrew version 3.4 - you can install official antlr3 though
+        brew tap Gui13/linphone
+        brew install antlr3.2
 
 * Using MacPorts:
 
-        sudo port install ImageMagick optipng yasm nasm
+        sudo port install autoconf automake pkg-config doxygen antlr3 java nasm gettext wget yasm optipng ImageMagick coreutils intltool
 
 ### System linking
 
@@ -30,13 +37,13 @@ You will NOT be able to build the SDK if you did not read liblinphone README fir
 
         export PATH=$LOCAL_BIN_DIR:$PATH
 
-* Install [gas-preprosessor.pl](http://github.com/yuvi/gas-preprocessor/) (version above July 2013) into your `LOCAL_BIN_DIR` directory
+* Install [gas-preprosessor.pl](http://github.com/yuvi/gas-preprocessor/) (version above July 2013) into your PATH. Suppose you use `LOCAL_BIN_DIR` directory:
 
         wget --no-check-certificate https://raw.github.com/yuvi/gas-preprocessor/master/gas-preprocessor.pl
         chmod +x gas-preprocessor.pl
         sudo mv gas-preprocessor.pl $LOCAL_BIN_DIR
 
-* Link `libtoolize` to `glibtoolize`
+* (HomeBrew only) Link `libtoolize` to `glibtoolize`
 
         sudo ln -s $LOCAL_BIN_DIR/glibtoolize $LOCAL_BIN_DIR/libtoolize
 
diff --git a/Tools/check_tools.sh b/Tools/check_tools.sh
new file mode 100755
index 000000000..32fd89a4a
--- /dev/null
+++ b/Tools/check_tools.sh
@@ -0,0 +1,58 @@
+#!/bin/sh
+
+error_on_quit=0
+
+echo_err() {
+	 echo "$@" >&2
+	 error_on_quit=1
+}
+
+check_installed() {
+	if [ -z "$(which $1)" ]; then
+		echo_err "Could not find $1. Please install $2."
+		return 1
+	fi
+	return 0
+}
+
+cd $(dirname $0)/..
+
+#autoconf pkg-config java ant yasm nasm wget
+for prog in autoconf automake pkg-config doxygen antlr3 java nasm gettext wget yasm optipng; do
+	check_installed "$prog" "it"
+done
+
+check_installed "ginstall" "coreutils"
+check_installed "intltoolize" "intltool"
+check_installed "convert" "imagemagick"
+
+if ! check_installed "libtoolize" "libtool"; then
+	if [ ! -z "$(which glibtoolize)" ]; then
+		echo_err "Note: it seems that you are using HomeBrew. Please do a symbolic link from " \
+				 "glibtoolize to libtoolize: 'ln -s $(which glibtoolize) /usr/local/bin/libtoolize'"
+	fi
+fi
+
+# needed by x264
+check_installed "gas-preprocessor.pl" "it following the README.md"
+
+if nasm -f elf32 2>&1 | grep -q "fatal: unrecognised output format"; then
+	echo_err "Invalid version of nasm: your version does not support elf32 output format. If you have installed nasm, please check that your PATH env variable is set correctly."
+fi
+
+if ! (find submodules/linphone/mediastreamer2 -mindepth 1 2>/dev/null | grep -q . \
+	|| find submodules/linphone/oRTP -mindepth 1 2>/dev/null | grep -q .); then
+	echo_err "Missing some git submodules. Did you run 'git submodule update --init --recursive'?"
+fi
+
+if ! xcrun --sdk iphoneos --show-sdk-path &>/dev/null; then
+	echo_err "iOS SDK not found, please install Xcode from AppStore or equivalent"
+elif [ ! -f $(xcrun --sdk iphonesimulator --show-sdk-platform-path)/Developer/usr/bin/strings ]; then
+	echo_err "strings binary missing, please run 'sudo ln -s $(which strings) $(xcrun --sdk iphonesimulator --show-sdk-platform-path)/Developer/usr/bin/strings'"
+fi
+
+if [ $error_on_quit != 0 ]; then
+	echo "Failed to detect required tools, aborting. Please run 'make very-clean' before rerunning 'make'"
+fi
+
+exit $error_on_quit
diff --git a/submodules/build/Makefile b/submodules/build/Makefile
index 9c1e1499c..62e0509df 100644
--- a/submodules/build/Makefile
+++ b/submodules/build/Makefile
@@ -25,8 +25,16 @@ enable_ffmpeg=yes
 enable_opus=yes
 enable_debug=no
 
-TUNNEL_AVAILABLE=$(shell git submodule status ../tunnel 2>/dev/null 1>/dev/null && echo yes)
 
+# Checks
+CHECK_MSG=$(shell ../../Tools/check_tools.sh)
+
+ifneq ($(CHECK_MSG),)
+	$(error Some tools are missing.)
+endif
+
+
+TUNNEL_AVAILABLE=$(shell git submodule status ../tunnel 2>/dev/null 1>/dev/null && echo yes)
 ifneq ($(TUNNEL_AVAILABLE),)
 	enable_tunnel=yes
 	enable_gpl_third_parties=no