Add support for job pools

Commands can now be assigned to an arbitrary job pool and a limit for
the number of concurrently running jobs in such pools can be provided in
a number of ways:
- via the build command line: qbs --job-limits linker:1
- via the settings: qbs config preferences.jobLimit.linker 1
- in a project file: JobLimit {
                         jobPool: "linker";
                         jobCount: 1
                     }
We provide two job pools ourselves with the cpp module: "compiler" and
"linker".

[ChangeLog] Added the concept of job pools for limiting concurrent
execution of commands by type

Task-number: QBS-743
Change-Id: Ib3f361dbc73093e342bf0eba0daf2079a2b3a8ce
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

1 files changed, 2 insertions, 0 deletions

diff --git a/share/qbs/modules/cpp/msvc.js b/share/qbs/modules/cpp/msvc.js
index d6df99dc2..196e5ae43 100644
--- a/share/qbs/modules/cpp/msvc.js
+++ b/share/qbs/modules/cpp/msvc.js
@@ -246,6 +246,7 @@ function prepareCompiler(project, product, inputs, outputs, input, output, expli
     if (pchOutput)
         cmd.description += ' (' + tag + ')';
     cmd.highlight = "compiler";
+    cmd.jobPool = "compiler";
     cmd.workingDirectory = product.buildDirectory;
     cmd.responseFileUsagePrefix = '@';
     // cl.exe outputs the cpp file name. We filter that out.
@@ -469,6 +470,7 @@ function prepareLinker(project, product, inputs, outputs, input, output) {
     var cmd = new Command(linkerPath, args)
     cmd.description = 'linking ' + primaryOutput.fileName;
     cmd.highlight = 'linker';
+    cmd.jobPool = "linker";
     cmd.relevantEnvironmentVariables = ["LINK", "_LINK_", "LIB", "TMP"];
     cmd.workingDirectory = FileInfo.path(primaryOutput.filePath)
     cmd.responseFileUsagePrefix = '@';