Downgrade arm cross compile toolchain to glibc 2.34 (#7153)

Author: smoy

azure-pipelines.yml

@@ -52,10 +52,11 @@ jobs:
     vmImage: "ubuntu-latest"
   container: "quay.io/pypa/manylinux2014_x86_64:latest"
   steps:
-  - script: curl -L -o /tmp/arm-toolchain.tar.xz 'https://developer.arm.com/-/media/Files/downloads/gnu/13.2.rel1/binrel/arm-gnu-toolchain-13.2.rel1-x86_64-aarch64-none-linux-gnu.tar.xz?rev=22c39fc25e5541818967b4ff5a09ef3e&hash=E7676169CE35FC2AAECF4C121E426083871CA6E5'
+  - script: curl -L -o /tmp/arm-toolchain.tar.xz 'https://developer.arm.com/-/media/Files/downloads/gnu/11.2-2022.02/binrel/gcc-arm-11.2-2022.02-x86_64-aarch64-none-linux-gnu.tar.xz?rev=33c6e30e5ac64e6dba8f0431f2c35f1b&hash=9918A05BF47621B632C7A5C8D2BB438FB80A4480'
   - script: mkdir -p /tmp/arm-toolchain/
   - script: tar xf /tmp/arm-toolchain.tar.xz -C /tmp/arm-toolchain/ --strip-components=1
   - script: echo '##vso[task.prependpath]/tmp/arm-toolchain/bin'
+  - script: echo '##vso[task.prependpath]/tmp/arm-toolchain/aarch64-none-linux-gnu/libc/usr/bin'
   - script: echo $PATH
   - script: stat /tmp/arm-toolchain/bin/aarch64-none-linux-gnu-gcc
   - task: PythonScript@0
@@ -65,15 +66,6 @@ jobs:
       scriptPath: scripts/mk_unix_dist.py
       arguments: --nodotnet --nojava --arch=arm64
       pythonInterpreter: $(python)
-  - script: git clone https://github.com/z3prover/z3test z3test
-    displayName: 'Clone z3test'
-  - task: PythonScript@0
-    displayName: Test
-    inputs:
-      scriptSource: 'filepath'
-      scriptPath: z3test/scripts/test_benchmarks.py
-      arguments: build-dist/z3 z3test/regressions/smt2
-      pythonInterpreter: $(python)
   - task: CopyFiles@2
     inputs:
       sourceFolder: dist

scripts/mk_unix_dist.py

@@ -171,12 +171,22 @@ def mk_z3():
             return 1
 
 def get_os_name():
+    global LINUX_X64
     if OS_NAME is not None:
         return OS_NAME
     import platform
     basic = os.uname()[0].lower()
     if basic == 'linux':
-        dist = platform.libc_ver()
+        if mk_util.IS_ARCH_ARM64 and LINUX_X64:
+            # handle cross compiling
+            # example: 'ldd (GNU) 2.34'
+            lines = subprocess.check_output(["ldd", "--version"]).decode('ascii')
+            first_line = lines.split("\n")[0]
+            ldd_version = first_line.split()[-1]
+            # coerce the format to platform.libc_ver() return type
+            dist = ('glibc', ldd_version)
+        else:
+            dist = platform.libc_ver()
         if len(dist) == 2 and len(dist[0]) > 0 and len(dist[1]) > 0:
             return '%s-%s' % (dist[0].lower(), dist[1].lower())
         else:
@@ -199,8 +209,14 @@ def get_os_name():
         return basic
 
 def get_z3_name():
+    import platform as platform_module
+    # Note that the platform name this function return
+    # has to work together with setup.py
+    # It's not the typical output from platform.machine()
     major, minor, build, revision = get_version()
-    if mk_util.IS_ARCH_ARM64:
+    if mk_util.IS_ARCH_ARM64 or platform_module.machine() == "aarch64":
+        # the second case handle native build on aarch64
+        # TODO: we don't handle cross compile on host aarch64 to target x64
         platform = "arm64"    
     elif sys.maxsize >= 2**32:
         platform = "x64"

scripts/nightly.yaml

@@ -203,10 +203,11 @@ stages:
       vmImage: "ubuntu-latest"
     container: "quay.io/pypa/manylinux2014_x86_64:latest"
     steps:
-    - script: curl -L -o /tmp/arm-toolchain.tar.xz 'https://developer.arm.com/-/media/Files/downloads/gnu/13.2.rel1/binrel/arm-gnu-toolchain-13.2.rel1-x86_64-aarch64-none-linux-gnu.tar.xz?rev=22c39fc25e5541818967b4ff5a09ef3e&hash=E7676169CE35FC2AAECF4C121E426083871CA6E5'
+    - script: curl -L -o /tmp/arm-toolchain.tar.xz 'https://developer.arm.com/-/media/Files/downloads/gnu/11.2-2022.02/binrel/gcc-arm-11.2-2022.02-x86_64-aarch64-none-linux-gnu.tar.xz?rev=33c6e30e5ac64e6dba8f0431f2c35f1b&hash=9918A05BF47621B632C7A5C8D2BB438FB80A4480'
     - script: mkdir -p /tmp/arm-toolchain/
     - script: tar xf /tmp/arm-toolchain.tar.xz -C /tmp/arm-toolchain/ --strip-components=1
     - script: echo '##vso[task.prependpath]/tmp/arm-toolchain/bin'
+    - script: echo '##vso[task.prependpath]/tmp/arm-toolchain/aarch64-none-linux-gnu/libc/usr/bin'
     - script: echo $PATH
     - script: stat /tmp/arm-toolchain/bin/aarch64-none-linux-gnu-gcc
     - task: PythonScript@0