lit tests: Drop support for gdb < 8 and dependency on distutils pip package (#4681)

Fixes #4671.

Author: kinke

.circleci/config.yml

@@ -42,7 +42,6 @@ commonSteps: &commonSteps
           fi
           # Install lit
           python3 --version
-          python3 -m pip install --user setuptools wheel
           python3 -m pip install --user lit
           python3 -c "import lit.main; lit.main.main();" --version . | head -n 1
           # Download & extract host LDC if HOST_LDC_VERSION is set

.cirrus.yml

@@ -4,8 +4,7 @@
 common_steps_template: &COMMON_STEPS_TEMPLATE
   install_lit_script: |
     # Install lit
-    rm -f /usr/lib/python3.11/EXTERNALLY-MANAGED # required for Ubuntu 23.04
-    python3 -m pip install --user setuptools wheel
+    rm -f /usr/lib/python3.12/EXTERNALLY-MANAGED # required for Ubuntu 24.04
     python3 -m pip install --user lit
     python3 -c "import lit.main; lit.main.main();" --version . | head -n 1
   clone_submodules_script: |

.github/actions/1-setup/action.yml

@@ -122,9 +122,8 @@ runs:
         set -euxo pipefail
         python3 --version
         if [[ '${{ runner.os }}-${{ inputs.arch }}' == 'macOS-arm64' ]]; then
-          brew install lit python-setuptools
+          brew install lit
         else
-          python3 -m pip install --user setuptools wheel
           python3 -m pip install --user lit
         fi
         python3 -c "import lit.main; lit.main.main();" --version . | head -n 1

.github/workflows/supported_llvm_versions.yml

@@ -58,9 +58,8 @@ jobs:
         run: |
           set -euxo pipefail
           if [[ '${{ matrix.os }}' == 'macos-14' ]]; then
-            brew install lit python-setuptools
+            brew install lit
           else
-            python3 -m pip install --user setuptools wheel
             python3 -m pip install --user lit
           fi
           python3 -c "import lit.main; lit.main.main();" --version . | head -n 1

tests/debuginfo/classtypes_gdb.d

@@ -3,7 +3,7 @@
 // This test fails due to newer version of GDB, see https://github.com/ldc-developers/ldc/issues/4389
 // XFAIL: FreeBSD
 
-// RUN: %ldc %_gdb_dflags -g -of=%t %s
+// RUN: %ldc -g -of=%t %s
 // RUN: sed -e "/^\\/\\/ GDB:/!d" -e "s,// GDB:,," %s >%t.gdb
 // RUN: gdb %t --batch -x %t.gdb >%t.out 2>&1
 // RUN: FileCheck %s -check-prefix=CHECK < %t.out

tests/debuginfo/nested_gdb.d

@@ -1,5 +1,5 @@
 // REQUIRES: gdb
-// RUN: %ldc %_gdb_dflags -g -of=%t %s
+// RUN: %ldc -g -of=%t %s
 // RUN: sed -e "/^\\/\\/ GDB:/!d" -e "s,// GDB:,," %s >%t.gdb
 // RUN: gdb %t --batch -x %t.gdb >%t.out 2>&1
 // RUN: FileCheck %s -check-prefix=CHECK < %t.out

tests/debuginfo/print_gdb.d

@@ -1,9 +1,8 @@
-// REQUIRES: atleast_gdb80
-
+// REQUIRES: gdb
 // This test fails due to newer version of GDB, see https://github.com/ldc-developers/ldc/issues/4389
 // XFAIL: FreeBSD
 
-// RUN: %ldc %_gdb_dflags -I%S -g -of=%t %s %S/inputs/import_a.d %S/inputs/import_b.d
+// RUN: %ldc -I%S -g -of=%t %s %S/inputs/import_a.d %S/inputs/import_b.d
 // RUN: sed -e "/^\\/\\/ GDB:/!d" -e "s,// GDB:,," %s >%t.gdb
 // RUN: env LANG=C gdb %t --batch -x %t.gdb >%t.out 2>&1
 // RUN: FileCheck %s -check-prefix=CHECK < %t.out

tests/lit.site.cfg.in

@@ -7,7 +7,6 @@ import string
 import re
 import subprocess
 import glob
-from distutils.version import LooseVersion
 
 # Cmake Boolean options
 ON = True
@@ -203,20 +202,6 @@ if (platform.system() == 'Windows') and os.path.isfile( cdb ):
 # Check whether GDB is present
 if (platform.system() != 'Windows') and lit.util.which('gdb', config.environment['PATH']):
     config.available_features.add('gdb')
-    gdb_dflags = ''
-    command = ['gdb', '--version']
-    p = subprocess.Popen(command, stdout=subprocess.PIPE,
-            stderr=subprocess.PIPE, universal_newlines=True)
-    text = p.stdout.readline()
-    m = re.compile('[^0-9]*([0-9]+[0-9.]*).*').match(text)
-    if m is not None:
-        gdb_version = m.group(1)
-        if LooseVersion(gdb_version) < LooseVersion('7.8'):
-            gdb_dflags = '-dwarf-version=2'
-        elif LooseVersion(gdb_version) >= LooseVersion('8.0'):
-            config.available_features.add('atleast_gdb80')
-
-    config.substitutions.append( ('%_gdb_dflags', gdb_dflags) )
 
 if 'LD_LIBRARY_PATH' in os.environ:
     libs = []