Enable RyuJIT/arm32 crossgen compilation of S.P.C.dll

Currently, an ARM build and CI test run uses the legacy backend
arm32 JIT. This change enables a build of RyuJIT/arm32 as a
cross-targeting protojit.dll (altjit) in the cross tools (placed
next to the x86 hosted crossgen.exe in the build), and uses that
RyuJIT/arm32 cross-compiler to build System.Private.CoreLib.dll.
The CI system when testing RyuJIT/arm32 will use this to test
the crossgen'ed System.Private.CoreLib.dll built by RyuJIT/arm32
for all "arm" architecture jobs.

1 files changed, 8 insertions, 1 deletions

diff --git a/netci.groovy b/netci.groovy
index 31d0b840a8..44badd7b79 100755
--- a/netci.groovy
+++ b/netci.groovy
@@ -1793,8 +1793,15 @@ def static calculateBuildCommands(def newJob, def scenario, def branch, def isPR
 
                     def buildArchitecture = 'arm'
 
+                    // For 'arm' (the RyuJIT/arm32 architecture), tell build.cmd to use RyuJIT/arm32 for crossgen compilation.
+                    // RyuJIT/arm32 is currently not the default JIT; it is an aljit. So, this is a special case.
+                    def armCrossgenOpt = ''
+                    if (architecture == 'arm') {
+                        armCrossgenOpt = '-altjitcrossgen'
+                    }
+
                     // This is now a build only job. Do not run tests. Use the flow job.
-                    buildCommands += "set __TestIntermediateDir=int&&build.cmd ${lowerConfiguration} ${buildArchitecture} -priority=${priority}"
+                    buildCommands += "set __TestIntermediateDir=int&&build.cmd ${lowerConfiguration} ${buildArchitecture} -priority=${priority} ${armCrossgenOpt}"
                     
                     // Zip up the tests directory so that we don't use so much space/time copying
                     // 10s of thousands of files around.