Use LLVM_ENABLE_RUNTIMES to build compiler-rt by default

Addresses rdar://113972453

Author: edymtt

utils/build_swift/build_swift/driver_arguments.py

@@ -1404,7 +1404,7 @@ def create_argument_parser():
                 'separated options "-DCMAKE_VAR1=YES,-DCMAKE_VAR2=/tmp". Can '
                 'be called multiple times to add multiple such options.')
 
-    option('--llvm-build-compiler-rt-with-use-runtimes', toggle_true,
+    option('--llvm-build-compiler-rt-with-use-runtimes', toggle_true, default=True,
            help='Switch to LLVM_ENABLE_RUNTIMES as the mechanism to build compiler-rt'
                 'It will become the default with LLVM 21, this flag is '
                 'meant to stage its introduction and account for edge cases')

utils/build_swift/tests/expected_options.py

@@ -231,7 +231,7 @@
     'lldb_build_variant': 'Debug',
     'lldb_build_with_xcode': '0',
     'llvm_assertions': True,
-    'llvm_build_compiler_rt_with_use_runtimes': False,
+    'llvm_build_compiler_rt_with_use_runtimes': True,
     'llvm_build_variant': 'Debug',
     'llvm_cmake_options': [],
     'llvm_enable_modules': False,

validation-test/BuildSystem/llvm-build-compiler-rt-with-enable-external-compiler-rt.test

@@ -1,7 +1,5 @@
 # REQUIRES: standalone_build
 
-# RUN: %empty-directory(%t)
-# RUN: SKIP_XCODE_VERSION_CHECK=1 SWIFT_BUILD_ROOT=%t %swift_src_root/utils/build-script --dry-run --skip-build --cmake %cmake  2>&1 | %FileCheck --check-prefix=EXTERNAL-COMPILER-RT-CHECK %s
 # RUN: %empty-directory(%t)
 # RUN: SKIP_XCODE_VERSION_CHECK=1 SWIFT_BUILD_ROOT=%t %swift_src_root/utils/build-script --dry-run --skip-build --llvm-build-compiler-rt-with-use-runtimes=0 --cmake %cmake  2>&1 | %FileCheck --check-prefix=EXTERNAL-COMPILER-RT-CHECK %s
 
@@ -12,8 +10,6 @@
 # EXTERNAL-COMPILER-RT-CHECK-SAME: -DLLVM_ENABLE_PROJECTS{{[^ ]*}}={{[^ ]*}}compiler-rt
 # EXTERNAL-COMPILER-RT-CHECK-SAME: llvm
 
-# RUN: %empty-directory(%t)
-# RUN: SKIP_XCODE_VERSION_CHECK=1 SWIFT_BUILD_ROOT=%t %swift_src_root/utils/build-script --dry-run --skip-build --skip-build-compiler-rt --cmake %cmake  2>&1 | %FileCheck --check-prefix=DONT-BUILD-COMPILER-RT %s
 # RUN: %empty-directory(%t)
 # RUN: SKIP_XCODE_VERSION_CHECK=1 SWIFT_BUILD_ROOT=%t %swift_src_root/utils/build-script --dry-run --skip-build --llvm-build-compiler-rt-with-use-runtimes=0 --skip-build-compiler-rt --cmake %cmake  2>&1 | %FileCheck --check-prefix=DONT-BUILD-COMPILER-RT %s
 

validation-test/BuildSystem/llvm-build-compiler-rt-with-use-runtimes.test

@@ -1,7 +1,7 @@
 # REQUIRES: standalone_build
 
 # RUN: %empty-directory(%t)
-# RUN: SKIP_XCODE_VERSION_CHECK=1 SWIFT_BUILD_ROOT=%t %swift_src_root/utils/build-script --dry-run --skip-build --llvm-build-compiler-rt-with-use-runtimes --cmake %cmake  2>&1 | %FileCheck --check-prefix=LLVM-USE-RUNTIMES %s
+# RUN: SKIP_XCODE_VERSION_CHECK=1 SWIFT_BUILD_ROOT=%t %swift_src_root/utils/build-script --dry-run --skip-build --cmake %cmake  2>&1 | %FileCheck --check-prefix=LLVM-USE-RUNTIMES %s
 # RUN: %empty-directory(%t)
 # RUN: SKIP_XCODE_VERSION_CHECK=1 SWIFT_BUILD_ROOT=%t %swift_src_root/utils/build-script --dry-run --skip-build --llvm-build-compiler-rt-with-use-runtimes=1 --cmake %cmake  2>&1 | %FileCheck --check-prefix=LLVM-USE-RUNTIMES %s
 
@@ -14,7 +14,7 @@
 # LLVM-USE-RUNTIMES-SAME: llvm
 
 # RUN: %empty-directory(%t)
-# RUN: SKIP_XCODE_VERSION_CHECK=1 SWIFT_BUILD_ROOT=%t %swift_src_root/utils/build-script --dry-run --skip-build --llvm-build-compiler-rt-with-use-runtimes --skip-build-compiler-rt --cmake %cmake  2>&1 | %FileCheck --check-prefix=DONT-BUILD-COMPILER-RT %s
+# RUN: SKIP_XCODE_VERSION_CHECK=1 SWIFT_BUILD_ROOT=%t %swift_src_root/utils/build-script --dry-run --skip-build --skip-build-compiler-rt --cmake %cmake  2>&1 | %FileCheck --check-prefix=DONT-BUILD-COMPILER-RT %s
 # RUN: %empty-directory(%t)
 # RUN: SKIP_XCODE_VERSION_CHECK=1 SWIFT_BUILD_ROOT=%t %swift_src_root/utils/build-script --dry-run --skip-build --llvm-build-compiler-rt-with-use-runtimes=1 --skip-build-compiler-rt --cmake %cmake  2>&1 | %FileCheck --check-prefix=DONT-BUILD-COMPILER-RT %s