libc: make all builds LLVM_ENABLE_RUNTIMES (#325)

No longer will any CI builds use LLVM_ENABLE_PROJECTS, which is
deprecated as of llvm/llvm-project#117265.

Buildbots will probably need their CMakeCache.txt reset after this.

Link: llvm/llvm-project#78479

zorg/buildbot/builders/annotated/libc-linux.py

@@ -12,9 +12,6 @@
 def is_fullbuild_builder(builder_name):
     return ('fullbuild' in builder_name.split('-'))
 
-def is_runtimes_builder(builder_name):
-    return ('runtimes' in builder_name.split('-'))
-
 def is_bootstrap_builder(builder_name):
     return 'bootstrap' in builder_name
 
@@ -44,7 +41,6 @@ def main(argv):
     source_dir = os.path.join('..', 'llvm-project')
     builder_name = os.environ.get('BUILDBOT_BUILDERNAME')
     fullbuild = is_fullbuild_builder(builder_name)
-    runtimes_build = is_runtimes_builder(builder_name)
     bootstrap_build = is_bootstrap_builder(builder_name)
     gcc_build = is_gcc_builder(builder_name)
     lint_build = is_lint_builder(builder_name)
@@ -71,16 +67,14 @@ def main(argv):
         # explicit here, which reduces one step of setting environment
         # variables when setting up workers.
         cmake_args = ['-GNinja',
+                      '-DLLVM_ENABLE_RUNTIMES=libc',
                       '-DCMAKE_C_COMPILER=%s' % cc,
                       '-DCMAKE_CXX_COMPILER=%s' % cxx]
         if lint_build:
             cmake_args.append('-DLLVM_LIBC_CLANG_TIDY=%s' % clang_tidy)
 
-        if runtimes_build or bootstrap_build:
+        if bootstrap_build:
           projects = ['clang']
-          cmake_args.append('-DLLVM_ENABLE_RUNTIMES=libc')
-        else:
-          projects = ['libc']
 
         if args.debug:
             cmake_args.append('-DCMAKE_BUILD_TYPE=Debug')
@@ -131,7 +125,7 @@ def main(argv):
        with step('build libc-startup'):
           run_command(['ninja', 'libc-startup'])
 
-    if runtimes_build or bootstrap_build:
+    if bootstrap_build:
         with step('check-libc'):
             run_command(['ninja', 'check-libc'])
     else:
@@ -150,7 +144,7 @@ def main(argv):
         with step('Benchmark Utils Tests'):
             run_command(['ninja', 'libc-benchmark-util-tests'])
 
-    if not (fullbuild or runtimes_build or bootstrap_build) and x86_64_build:
+    if not (fullbuild or bootstrap_build) and x86_64_build:
         with step('libc-fuzzer'):
             run_command(['ninja', 'libc-fuzzer'])