Simplify build.sh command line arguments for Linux/arm cross build (Part 1) (#20836)

* Don't use crosscomponent|-crosscomponent command line args in build.sh
* Don't use CROSSCOMPONENT environment variable in build.sh src/pal/tools/gen-buildsys-clang.sh
* Remove mentioning -crosscomponent from usage() in build-test.sh
* Don't use -crosscomponent in buildpipeline
* Don't use -crosscomponent in Groovy files
* Remove mentioning crosscomponent in Documentation/building/linux-instructions.md
* Stop building Hostx86/armel crossgen in build.sh
* Disable CrossGen-ing of System.Private.CoreLib on Linux/armel

1 files changed, 10 insertions, 13 deletions

diff --git a/build.sh b/build.sh
index 459e52719d..e9b5d062b0 100755
--- a/build.sh
+++ b/build.sh
@@ -34,8 +34,6 @@ usage()
     echo "-clangx.y - optional argument to build using clang version x.y."
     echo "-cross - optional argument to signify cross compilation,"
     echo "       - will use ROOTFS_DIR environment variable if set."
-    echo "-crosscomponent - optional argument to build cross-architecture component,"
-    echo "                - will use CAC_ROOTFS_DIR environment variable if set."
     echo "-nopgooptimize - do not use profile guided optimizations."
     echo "-pgoinstrument - generate instrumented code for profile guided optimization enabled binaries."
     echo "-ibcinstrument - generate IBC-tuning-enabled native images when invoking crossgen."
@@ -383,14 +381,13 @@ build_cross_architecture_components()
         fi
     fi
 
-    __ExtraCmakeArgs="-DCLR_CMAKE_TARGET_ARCH=$__BuildArch -DCLR_CMAKE_TARGET_OS=$__BuildOS -DCLR_CMAKE_PACKAGES_DIR=$__PackagesDir -DCLR_CMAKE_PGO_INSTRUMENT=$__PgoInstrument -DCLR_CMAKE_OPTDATA_VERSION=$__PgoOptDataVersion -DCLR_CMAKE_PGO_OPTIMIZE=$__PgoOptimize"
+    __ExtraCmakeArgs="-DCLR_CMAKE_TARGET_ARCH=$__BuildArch -DCLR_CMAKE_TARGET_OS=$__BuildOS -DCLR_CMAKE_PACKAGES_DIR=$__PackagesDir -DCLR_CMAKE_PGO_INSTRUMENT=$__PgoInstrument -DCLR_CMAKE_OPTDATA_VERSION=$__PgoOptDataVersion -DCLR_CMAKE_PGO_OPTIMIZE=$__PgoOptimize -DCLR_CROSS_COMPONENTS_BUILD=1"
     build_native $__SkipCrossArchBuild "$crossArch" "$intermediatesForBuild" "$__ExtraCmakeArgs" "cross-architecture components"
 
-    # restore ROOTFS_DIR, CROSSCOMPONENT, and CROSSCOMPILE
+    # restore ROOTFS_DIR and CROSSCOMPILE
     if [ -n "$TARGET_ROOTFS" ]; then
         export ROOTFS_DIR="$TARGET_ROOTFS"
     fi
-    export CROSSCOMPONENT=
     export CROSSCOMPILE=1
 }
 
@@ -511,10 +508,10 @@ build_CoreLib()
        else
            exit 1
        fi
-    elif [ $__DoCrossArchBuild == 1 ]; then
-       if [[ ( "$__CrossArch" == "x86" ) && ( "$__BuildArch" == "arm" || "$__BuildArch" == "armel" ) ]]; then
+    else
+       if [[ ( "$__CrossArch" == "x86" ) && ( "$__BuildArch" == "arm" ) ]]; then
            build_CoreLib_ni "$__CrossComponentBinDir/crossgen"
-       elif [[ ( "$__CrossArch" == "x64" ) && ( "$__BuildArch" == "arm" || "$__BuildArch" == "armel" ) ]]; then
+       elif [[ ( "$__CrossArch" == "x64" ) && ( "$__BuildArch" == "arm" ) ]]; then
            build_CoreLib_ni "$__CrossComponentBinDir/crossgen"
        elif [[ ( "$__HostArch" == "x64" ) && ( "$__BuildArch" == "arm64" ) ]]; then
            build_CoreLib_ni "$__CrossComponentBinDir/crossgen"
@@ -540,7 +537,7 @@ generate_NugetPackages()
     echo "DistroRid is "$__DistroRid
     echo "ROOTFS_DIR is "$ROOTFS_DIR
     # Build the packages
-    $__ProjectRoot/run.sh build -Project=$__SourceDir/.nuget/packages.builds -MsBuildEventLogging="/l:BinClashLogger,Tools/Microsoft.DotNet.Build.Tasks.dll;LogFile=binclash.log" -MsBuildLog="/flp:Verbosity=normal;LogFile=$__LogsDir/Nuget_$__BuildOS__$__BuildArch__$__BuildType.log" -BuildTarget -__IntermediatesDir=$__IntermediatesDir -__RootBinDir=$__RootBinDir -BuildNugetPackage=false -UseSharedCompilation=false -__DoCrossArchBuild=$__DoCrossArchBuild $__RunArgs $__UnprocessedBuildArgs
+    $__ProjectRoot/run.sh build -Project=$__SourceDir/.nuget/packages.builds -MsBuildEventLogging="/l:BinClashLogger,Tools/Microsoft.DotNet.Build.Tasks.dll;LogFile=binclash.log" -MsBuildLog="/flp:Verbosity=normal;LogFile=$__LogsDir/Nuget_$__BuildOS__$__BuildArch__$__BuildType.log" -BuildTarget -__IntermediatesDir=$__IntermediatesDir -__RootBinDir=$__RootBinDir -BuildNugetPackage=false -UseSharedCompilation=false -__DoCrossArchBuild=$__CrossBuild $__RunArgs $__UnprocessedBuildArgs
 
     if [ $? -ne 0 ]; then
         echo "Failed to generate Nuget packages."
@@ -678,7 +675,6 @@ __HostDistroRid=""
 __DistroRid=""
 __cmakeargs=""
 __SkipGenerateVersion=0
-__DoCrossArchBuild=0
 __PortableBuild=1
 __msbuildonunsupportedplatform=0
 __PgoOptDataVersion=""
@@ -845,7 +841,8 @@ while :; do
             ;;
 
         crosscomponent|-crosscomponent)
-            __DoCrossArchBuild=1
+            # Accept "crosscomponent" for backward-compatibility but ignore it.
+            echo "WARNING: 'crosscomponent' is obsolete and should not be used"
             ;;
 
         skipmanaged|-skipmanaged)
@@ -1051,11 +1048,11 @@ fi
 build_native $__SkipCoreCLR "$__BuildArch" "$__IntermediatesDir" "$__ExtraCmakeArgs" "CoreCLR component"
 
 # Build cross-architecture components
-if [[ $__CrossBuild == 1 && $__DoCrossArchBuild == 1 ]]; then
+if [[ $__CrossBuild == 1 ]]; then
     build_cross_architecture_components "$__CrossArch"
 
     # For now, continue building Hostx86/arm crossgen
-    if [[ "$__HostArch" == "x64" && ("$__BuildArch" == "arm" || "$__BuildArch" == "armel") ]]; then
+    if [[ "$__HostArch" == "x64" && "$__BuildArch" == "arm" ]]; then
         build_cross_architecture_components "x86"
     fi
 fi