baremetal: Handle cpp.prefixHeaders property in IAR assembler

We need to pass the `--preinclude` option and to the assembler
too in case the `cpp.prefixHeaders` is not empty.

One caveat is that this option is not supported on all architectures
and we need to handle it properly.

Change-Id: I31eda38a8f400a0534a43d141ee64aef405fa683
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

1 files changed, 10 insertions, 1 deletions

diff --git a/share/qbs/modules/cpp/iar.js b/share/qbs/modules/cpp/iar.js
index 0cead91c3..9e40223df 100644
--- a/share/qbs/modules/cpp/iar.js
+++ b/share/qbs/modules/cpp/iar.js
@@ -794,6 +794,16 @@ function assemblerFlags(project, product, input, outputs, explicitlyDependsOn) {
     // Output.
     args.push("-o", outputs.obj[0].filePath);
 
+    var architecture = input.qbs.architecture;
+
+    // The `--preinclude` flag is only supported for a certain
+    // set of assemblers, not for all.
+    if (supportIAssembler(architecture)) {
+        var prefixHeaders = input.cpp.prefixHeaders;
+        for (var i in prefixHeaders)
+            args.push("--preinclude", prefixHeaders[i]);
+    }
+
     // Includes.
     var allIncludePaths = [];
     var systemIncludePaths = input.cpp.systemIncludePaths;
@@ -809,7 +819,6 @@ function assemblerFlags(project, product, input, outputs, explicitlyDependsOn) {
         args.push("-r");
 
     // Architecture specific flags.
-    var architecture = input.qbs.architecture;
     if (supportIAssembler(architecture)) {
         // Silent output generation flag.
         args.push("--silent");