bare-metal: Link with library dependencies on IAR for ARM

This patch adds the possibility to link the application with
an external or dependent libraries. IAR supports linking
only with the static libraries for the bare-metal devices.

Now it is possible to use the cpp.staticLibraries and
cpp.libraryPaths properties, also to use the product's
library dependencies via Depends { name: "mylib" }.

Change-Id: I5129473dc0353970d060a8c714b2f4b51d1ab4cc
Reviewed-by: Richard Weickelt <richard@weickelt.de>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

2 files changed, 70 insertions, 0 deletions

diff --git a/share/qbs/modules/cpp/iar.js b/share/qbs/modules/cpp/iar.js
index ae852c1b6..c2c9e569e 100644
--- a/share/qbs/modules/cpp/iar.js
+++ b/share/qbs/modules/cpp/iar.js
@@ -71,6 +71,61 @@ function dumpMacros(compilerFilePath, qbs, nullDevice) {
     return map;
 }
 
+function collectLibraryDependencies(product) {
+    var seen = {};
+    var result = [];
+
+    function addFilePath(filePath) {
+        result.push({ filePath: filePath });
+    }
+
+    function addArtifactFilePaths(dep, artifacts) {
+        if (!artifacts)
+            return;
+        var artifactFilePaths = artifacts.map(function(a) { return a.filePath; });
+        artifactFilePaths.forEach(addFilePath);
+    }
+
+    function addExternalStaticLibs(obj) {
+        if (!obj.cpp)
+            return;
+        function ensureArray(a) {
+            return Array.isArray(a) ? a : [];
+        }
+        function sanitizedModuleListProperty(obj, moduleName, propertyName) {
+            return ensureArray(ModUtils.sanitizedModuleProperty(obj, moduleName, propertyName));
+        }
+        var externalLibs = [].concat(
+                    sanitizedModuleListProperty(obj, "cpp", "staticLibraries"));
+        var staticLibrarySuffix = obj.moduleProperty("cpp", "staticLibrarySuffix");
+        externalLibs.forEach(function(staticLibraryName) {
+            if (!staticLibraryName.endsWith(staticLibrarySuffix))
+                staticLibraryName += staticLibrarySuffix;
+            addFilePath(staticLibraryName);
+        });
+    }
+
+    function traverse(dep) {
+        if (seen.hasOwnProperty(dep.name))
+            return;
+        seen[dep.name] = true;
+
+        if (dep.parameters.cpp && dep.parameters.cpp.link === false)
+            return;
+
+        var staticLibraryArtifacts = dep.artifacts["staticlibrary"];
+        if (staticLibraryArtifacts) {
+            dep.dependencies.forEach(traverse);
+            addArtifactFilePaths(dep, staticLibraryArtifacts);
+            addExternalStaticLibs(dep);
+        }
+    }
+
+    product.dependencies.forEach(traverse);
+    addExternalStaticLibs(product);
+    return result;
+}
+
 function compilerFlags(project, product, input, output, explicitlyDependsOn) {
     // Determine which C-language we"re compiling.
     var tag = ModUtils.fileTagForTargetLanguage(input.fileTags.concat(output.fileTags));
@@ -197,6 +252,19 @@ function linkerFlags(project, product, input, outputs) {
     if (product.cpp.generateMapFile)
         args.push("--map", outputs.map_file[0].filePath);
 
+    var allLibraryPaths = [];
+    var libraryPaths = product.cpp.libraryPaths;
+    if (libraryPaths)
+        allLibraryPaths = allLibraryPaths.uniqueConcat(libraryPaths);
+    var distributionLibraryPaths = product.cpp.distributionLibraryPaths;
+    if (distributionLibraryPaths)
+        allLibraryPaths = allLibraryPaths.uniqueConcat(distributionLibraryPaths);
+    args = args.concat(allLibraryPaths.map(function(path) { return '-L' + path }));
+
+    var libraryDependencies = collectLibraryDependencies(product);
+    if (libraryDependencies)
+        args = args.concat(libraryDependencies.map(function(dep) { return dep.filePath }));
+
     var linkerScripts = inputs.linkerscript
             ? inputs.linkerscript.map(function(a) { return a.filePath; }) : [];
     for (i in linkerScripts)
diff --git a/share/qbs/modules/cpp/iar.qbs b/share/qbs/modules/cpp/iar.qbs
index 69a0a0377..b91bd6022 100644
--- a/share/qbs/modules/cpp/iar.qbs
+++ b/share/qbs/modules/cpp/iar.qbs
@@ -149,6 +149,7 @@ CppModule {
         id: applicationLinker
         multiplex: true
         inputs: ["obj", "linkerscript"]
+        inputsFromDependencies: ["staticlibrary"]
 
         outputFileTags: {
             var tags = ["application"];
@@ -182,6 +183,7 @@ CppModule {
         id: staticLibraryLinker
         multiplex: true
         inputs: ["obj"]
+        inputsFromDependencies: ["staticlibrary"]
 
         Artifact {
             fileTags: ["staticlibrary"]