Add libtool case

src/analyze-error.js

@@ -11,6 +11,11 @@ function isBrokenBuildEnvironment(code) {
 	return (code.indexOf("library not found for -lgcc_s.10.5") !== -1);
 }
 
+function isMissingLibtool(code) {
+	// testcases/3.txt
+	return (code.includes("Can't exec \"libtoolize\": No such file or directory"));
+}
+
 function isMissingPython(code) {
 	// testcases/1.txt
 	return (
@@ -127,6 +132,8 @@ function getErrorType(code) {
 		return "missingEnvironment";
 	} else if (isBrokenBuildEnvironment(code)) {
 		return "brokenEnvironment";
+	} else if (isMissingLibtool(code)) {
+		return "missingLibtool";
 	} else if (isMissingPython(code)) {
 		return "missingPython";
 	} else if (isWrongPython(code)) {

src/components/solution-viewer.tag

@@ -20,6 +20,11 @@ solution-viewer
 				li If on OS X, make sure to upgrade your installation of XCode to the latest version.
 				li If it still doesn't work, try reinstalling Node.js.
 
+		solution(topic="missingLibtool")
+			h3 <code>libtool</code> is not installed.
+			p One of the dependencies you tried to install (<code>{parent.offendingModule}</code>) requires <code>libtool</code> for its compilation process, but it's missing from your system.
+			p To solve this problem, install the <strong><code>libtool</code></strong> package through your system's package manager, and retry the <code>npm install</code>.
+
 		solution(topic="missingPython")
 			h3 Python is not installed.
 			p You will need to have Python installed, to be able to install compiled (C++) modules with NPM. It's possible that you're also missing other build tools.