diff --git a/utils/bazel/llvm-project-overlay/clang/BUILD.bazel b/utils/bazel/llvm-project-overlay/clang/BUILD.bazel
index 037719a51..476efdde8 100644
--- a/utils/bazel/llvm-project-overlay/clang/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/clang/BUILD.bazel
@@ -533,7 +533,7 @@ cc_library(
         "lib/Basic/*.h",
         "lib/Basic/Targets/*.cpp",
         "lib/Basic/Targets/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/clang/Basic/*.h",
     ]),
@@ -944,7 +944,7 @@ cc_library(
         "lib/Analysis/FlowSensitive/*.cpp",
         "lib/Analysis/*.cpp",
         "lib/Analysis/*.h",
-    ]) + [
+    ], allow_empty = True) + [
         ":analysis_htmllogger_gen",
     ],
     hdrs = glob([
@@ -1080,7 +1080,7 @@ cc_library(
     ] + glob([
         "lib/Parse/*.cpp",
         "lib/Parse/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = [
         "include/clang/Parse/AttrParserStringSwitches.inc",
         "include/clang/Parse/AttrSubMatchRulesParserStringSwitches.inc",
@@ -1104,7 +1104,7 @@ cc_library(
     srcs = glob([
         "lib/ASTMatchers/*.cpp",
         "lib/ASTMatchers/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/clang/ASTMatchers/*.h"]),
     includes = ["include"],
     deps = [
@@ -1138,7 +1138,7 @@ cc_library(
     srcs = glob([
         "lib/Rewrite/*.cpp",
         "lib/Rewrite/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/clang/Rewrite/Core/*.h"]),
     includes = ["include"],
     deps = [
@@ -1172,7 +1172,7 @@ cc_library(
     srcs = glob([
         "lib/Tooling/Core/*.cpp",
         "lib/Tooling/Core/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/clang/Tooling/Core/*.h"]),
     includes = ["include"],
     deps = [
@@ -1237,11 +1237,11 @@ cc_library(
     srcs = glob([
         "lib/Tooling/Refactoring/**/*.cpp",
         "lib/Tooling/Refactoring/**/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/clang/Tooling/Refactoring/**/*.h",
         "include/clang/Tooling/Refactoring/**/*.def",
-    ]),
+    ], allow_empty = True),
     deps = [
         ":ast",
         ":ast_matchers",
@@ -1500,6 +1500,7 @@ cc_library(
         exclude = [
             "lib/Driver/ToolChains/MSVCSetupApi.h",
         ],
+        allow_empty = True,
     ),
     hdrs = glob([
         "include/clang/Driver/*.h",
@@ -1716,7 +1717,7 @@ cc_library(
     includes = ["include"],
     textual_hdrs = glob([
         "include/clang/Frontend/*.def",
-    ]),
+    ], allow_empty = True),
     deps = [
         ":ast",
         ":basic",
@@ -1752,7 +1753,7 @@ cc_library(
     srcs = glob([
         "lib/Frontend/Rewrite/*.cpp",
         "lib/Frontend/Rewrite/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/clang/Rewrite/Frontend/*.h"]),
     includes = ["include"],
     deps = [
@@ -1967,7 +1968,7 @@ cc_library(
     srcs = glob([
         "lib/FrontendTool/*.cpp",
         "lib/FrontendTool/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/clang/FrontendTool/*.h"]),
     includes = ["include"],
     deps = [
@@ -2155,7 +2156,7 @@ cc_binary(
     srcs = glob([
         "tools/clang-import-test/*.cpp",
         "tools/clang-import-test/*.h",
-    ]),
+    ], allow_empty = True),
     stamp = 0,
     deps = [
         ":ast",
@@ -2185,7 +2186,7 @@ cc_library(
     srcs = glob([
         "tools/driver/*.cpp",
         "tools/driver/*.h",
-    ]) + ["clang-driver.cpp"],
+    ], allow_empty = True) + ["clang-driver.cpp"],
     copts = [
         # Disable stack frame size checks in the driver because
         # clang::ensureStackAddressSpace allocates a large array on the stack.
@@ -2500,7 +2501,7 @@ cc_library(
     srcs = glob([
         "lib/ExtractAPI/**/*.cpp",
         "lib/ExtractAPI/**/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/clang/ExtractAPI/**/*.h"]),
     includes = ["include"],
     deps = [
diff --git a/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel b/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel
index a7e9398ea..703103cc9 100644
--- a/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel
@@ -96,7 +96,7 @@ enum_targets_gen(
 llvm_target_mcas = [
     t
     for t in llvm_targets
-    if glob(["lib/Target/{}/MCA/CMakeLists.txt".format(t)])
+    if glob(["lib/Target/{}/MCA/CMakeLists.txt".format(t)], allow_empty = True)
 ]
 
 enum_targets_gen(
@@ -169,7 +169,7 @@ cc_library(
     srcs = glob([
         "lib/Demangle/*.cpp",
         "lib/Demangle/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/Demangle/*.h",
         "include/llvm/Demangle/*.def",
@@ -205,7 +205,7 @@ cc_library(
         "@platforms//os:windows": glob([
             "lib/Support/Windows/*.h",
             "lib/Support/Windows/*.inc",
-        ]),
+        ], allow_empty = True),
         "//conditions:default": glob([
             "lib/Support/Unix/*.h",
             "lib/Support/Unix/*.inc",
@@ -314,7 +314,7 @@ cc_library(
     srcs = glob([
         "lib/LineEditor/*.cpp",
         "lib/LineEditor/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/LineEditor/*.h"]),
     copts = llvm_copts,
     deps = [
@@ -328,7 +328,7 @@ cc_library(
     srcs = glob([
         "lib/Option/*.cpp",
         "lib/Option/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/Option/*.h"]),
     copts = llvm_copts,
     deps = [
@@ -376,7 +376,7 @@ cc_library(
         "lib/BinaryFormat/*.cpp",
         "lib/BinaryFormat/*.def",
         "lib/BinaryFormat/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/BinaryFormat/*.h",
     ]),
@@ -408,7 +408,7 @@ cc_library(
     srcs = glob([
         "lib/DebugInfo/MSF/*.cpp",
         "lib/DebugInfo/MSF/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/DebugInfo/MSF/*.h"]),
     copts = llvm_copts,
     deps = [":Support"],
@@ -419,7 +419,7 @@ cc_library(
     srcs = glob([
         "lib/DebugInfo/BTF/*.cpp",
         "lib/DebugInfo/BTF/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/DebugInfo/BTF/*.h"]) + [
         "include/llvm/DebugInfo/BTF/BTF.def",
     ],
@@ -436,7 +436,7 @@ cc_library(
     srcs = glob([
         "lib/DebugInfo/CodeView/*.cpp",
         "lib/DebugInfo/CodeView/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/DebugInfo/CodeView/*.h",
     ]),
@@ -481,7 +481,7 @@ cc_library(
         "lib/DebugInfo/PDB/*.h",
         "lib/DebugInfo/PDB/Native/*.cpp",
         "lib/DebugInfo/PDB/Native/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/DebugInfo/PDB/*.h",
         "include/llvm/DebugInfo/PDB/Native/*.h",
@@ -522,12 +522,12 @@ cc_library(
     srcs = glob([
         "lib/MC/*.cpp",
         "lib/MC/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/MC/*.h",
         "include/llvm/MC/*.def",
         "include/llvm/MC/*.inc",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     deps = [
         ":BinaryFormat",
@@ -544,7 +544,7 @@ cc_library(
     srcs = glob([
         "lib/DebugInfo/DWARF/*.cpp",
         "lib/DebugInfo/DWARF/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/DebugInfo/DWARF/*.h"]),
     copts = llvm_copts,
     deps = [
@@ -562,7 +562,7 @@ cc_library(
     srcs = glob([
         "lib/DebugInfo/GSYM/*.cpp",
         "lib/DebugInfo/GSYM/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/DebugInfo/GSYM/*.h"]),
     copts = llvm_copts,
     deps = [
@@ -579,7 +579,7 @@ cc_library(
     srcs = glob([
         "lib/DebugInfo/Symbolize/*.cpp",
         "lib/DebugInfo/Symbolize/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/DebugInfo/Symbolize/*.h",
         "include/llvm/Debuginfod/*.h",
@@ -664,7 +664,7 @@ cc_binary(
         # regular dependency.
         "include/llvm/MC/*.h",
         "include/llvm/TargetParser/SubtargetFeature.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -812,7 +812,7 @@ cc_library(
     srcs = glob([
         "lib/Bitstream/Reader/*.cpp",
         "lib/Bitstream/Reader/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = [
         "include/llvm/Bitstream/BitCodeEnums.h",
         "include/llvm/Bitstream/BitCodes.h",
@@ -828,7 +828,7 @@ cc_library(
     name = "BitstreamWriter",
     srcs = glob([
         "lib/Bitstream/Writer/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = [
         "include/llvm/Bitstream/BitCodeEnums.h",
         "include/llvm/Bitstream/BitCodes.h",
@@ -848,6 +848,7 @@ cc_library(
             "lib/Remarks/*.h",
         ],
         exclude = ["lib/Remarks/RemarkLinker.cpp"],
+        allow_empty = True,
     ),
     hdrs = glob(
         [
@@ -947,7 +948,7 @@ cc_library(
     srcs = glob([
         "lib/MC/MCParser/*.cpp",
         "lib/MC/MCParser/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/MC/MCParser/*.h"]),
     copts = llvm_copts,
     deps = [
@@ -1032,7 +1033,7 @@ cc_library(
     srcs = glob([
         "lib/ObjectYAML/*.cpp",
         "lib/ObjectYAML/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/ObjectYAML/*.h"]),
     copts = llvm_copts,
     deps = [
@@ -1050,7 +1051,7 @@ cc_library(
     srcs = glob([
         "lib/ProfileData/*.cpp",
         "lib/ProfileData/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/ProfileData/*.h",
         "include/llvm/ProfileData/*.inc",
@@ -1074,7 +1075,7 @@ cc_library(
     srcs = glob([
         "lib/ProfileData/Coverage/*.cpp",
         "lib/ProfileData/Coverage/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/ProfileData/Coverage/*.h"]),
     copts = llvm_copts,
     deps = [
@@ -1093,6 +1094,7 @@ cc_library(
             "lib/Analysis/*.h",
             "lib/Analysis/*.def",
         ],
+        allow_empty = True,
     ),
     hdrs = glob(
         [
@@ -1149,7 +1151,7 @@ cc_library(
     srcs = glob([
         "lib/Target/*.cpp",
         "lib/Target/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/Target/*.h",
     ]) + [
@@ -1185,15 +1187,15 @@ cc_library(
     srcs = glob([
         "lib/TargetParser/*.cpp",
         "lib/TargetParser/*.h",
-    ]) + select({
+    ], allow_empty = True) + select({
         "@platforms//os:windows": glob([
             "lib/TargetParser/Windows/*.h",
             "lib/TargetParser/Windows/*.inc",
-        ]),
+        ], allow_empty = True),
         "//conditions:default": glob([
             "lib/TargetParser/Unix/*.h",
             "lib/TargetParser/Unix/*.inc",
-        ]),
+        ], allow_empty = True),
     }),
     hdrs = glob([
         "include/llvm/TargetParser/*.h",
@@ -1216,7 +1218,7 @@ cc_library(
     srcs = glob([
         "lib/DWP/*.cpp",
         "lib/DWP/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/DWP/*.h"]),
     copts = llvm_copts,
     deps = [
@@ -1233,7 +1235,7 @@ cc_library(
     srcs = glob([
         "lib/Transforms/Utils/*.cpp",
         "lib/Transforms/Utils/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/Transforms/Utils/*.h"]) + [
         "include/llvm/Transforms/Utils.h",
     ],
@@ -1354,7 +1356,7 @@ cc_library(
     srcs = glob([
         "lib/Transforms/Scalar/*.cpp",
         "lib/Transforms/Scalar/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/Transforms/Scalar/*.h"]) + [
         "include/llvm/Transforms/Scalar.h",
     ],
@@ -1399,7 +1401,7 @@ cc_library(
     name = "FrontendDebug",
     srcs = glob([
         "lib/Frontend/Debug/*.cpp",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/Frontend/Debug/*.h",
     ]),
@@ -1463,7 +1465,7 @@ cc_library(
         "include/llvm/Frontend/OpenMP/*.h",
         "include/llvm/Frontend/OpenMP/OMP/*.h",
         "include/llvm/Frontend/*.h",
-    ]) + [
+    ], allow_empty = True) + [
         "include/llvm/Frontend/OpenMP/OMP.h.inc",
         "include/llvm/Frontend/OpenMP/OMP.inc",
     ],
@@ -1523,7 +1525,7 @@ cc_library(
     ],
     hdrs = glob([
         "include/llvm/Frontend/OpenACC/*.h",
-    ]) + ["include/llvm/Frontend/OpenACC/ACC.h.inc"],
+    ], allow_empty = True) + ["include/llvm/Frontend/OpenACC/ACC.h.inc"],
     copts = llvm_copts,
     deps = [
         ":Analysis",
@@ -1538,7 +1540,7 @@ cc_library(
     srcs = glob([
         "lib/AsmParser/*.cpp",
         "lib/AsmParser/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/AsmParser/*.h"]),
     copts = llvm_copts,
     deps = [
@@ -1554,7 +1556,7 @@ cc_library(
     srcs = glob([
         "lib/IRPrinter/*.cpp",
         "lib/IRPrinter/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/IRPrinter/*.h",
     ]),
@@ -1571,7 +1573,7 @@ cc_library(
     srcs = glob([
         "lib/IRReader/*.cpp",
         "lib/IRReader/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/IRReader/*.h",
     ]) + [
@@ -1614,7 +1616,7 @@ cc_library(
     srcs = glob([
         "lib/Transforms/IPO/*.cpp",
         "lib/Transforms/IPO/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/Transforms/IPO/*.h",
     ]) + [
@@ -1652,7 +1654,7 @@ cc_library(
     srcs = glob([
         "lib/Transforms/CFGuard/*.cpp",
         "lib/Transforms/CFGuard/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = ["include/llvm/Transforms/CFGuard.h"],
     copts = llvm_copts,
     deps = [
@@ -1744,7 +1746,7 @@ cc_library(
     textual_hdrs = glob([
         "include/llvm/CodeGen/**/*.def",
         "include/llvm/CodeGen/**/*.inc",
-    ]),
+    ], allow_empty = True),
     deps = [
         ":AggressiveInstCombine",
         ":Analysis",
@@ -2200,7 +2202,7 @@ gentbl(
         ] + glob([
             "lib/Target/" + target["name"] + "/*.td",
             "lib/Target/" + target["name"] + "/GISel/*.td",
-        ]),
+        ], allow_empty = True),
         deps = target.get("tbl_deps", []),
     )],
     [cc_library(
@@ -2235,7 +2237,7 @@ gentbl(
             # library. This mixture is likely incompatible with header modules.
             "lib/Target/" + target["name"] + "/MCTargetDesc/*.h",
             "lib/Target/" + target["name"] + "/Utils/*.h",
-        ]),
+        ], allow_empty = True),
         hdrs = glob([
             "lib/Target/" + target["name"] + "/MCTargetDesc/*.h",
             "lib/Target/" + target["name"] + "/Utils/*.h",
@@ -2260,7 +2262,7 @@ gentbl(
             "lib/Target/" + target["name"] + "/*.def",
             "lib/Target/" + target["name"] + "/*.inc",
             "lib/Target/" + target["name"] + "/MCTargetDesc/*.def",
-        ]),
+        ], allow_empty = True),
         copts = llvm_copts,
         features = [
             "-parse_headers",
@@ -2292,7 +2294,7 @@ gentbl(
             "lib/Target/" + target["name"] + "/GISel/*.h",
             "lib/Target/" + target["name"] + "/*.cpp",
             "lib/Target/" + target["name"] + "/*.h",
-        ]),
+        ], allow_empty = True),
         hdrs = ["lib/Target/" + target["name"] + "/" + target["short_name"] + ".h"],
         copts = llvm_copts,
         features = ["-layering_check"],
@@ -2300,7 +2302,7 @@ gentbl(
         textual_hdrs = glob([
             "lib/Target/" + target["name"] + "/*.def",
             "lib/Target/" + target["name"] + "/*.inc",
-        ]),
+        ], allow_empty = True),
         deps = [
             ":Analysis",
             ":BinaryFormat",
@@ -2328,7 +2330,7 @@ gentbl(
         srcs = glob([
             "lib/Target/" + target["name"] + "/AsmParser/*.cpp",
             "lib/Target/" + target["name"] + "/AsmParser/*.h",
-        ]),
+        ], allow_empty = True),
         copts = llvm_copts,
         deps = [
             ":BinaryFormat",
@@ -2374,7 +2376,7 @@ gentbl(
             "lib/Target/" + target["name"] + "/Disassembler/*.cpp",
             "lib/Target/" + target["name"] + "/Disassembler/*.c",
             "lib/Target/" + target["name"] + "/Disassembler/*.h",
-        ]),
+        ], allow_empty = True),
         copts = llvm_copts,
         features = ["-layering_check"],
         deps = [
@@ -2396,7 +2398,7 @@ gentbl(
             "lib/Target/" + target["name"] + "/MCA/*.cpp",
             "lib/Target/" + target["name"] + "/MCA/*.c",
             "lib/Target/" + target["name"] + "/MCA/*.h",
-        ]),
+        ], allow_empty = True),
         copts = llvm_copts,
         features = ["-layering_check"],
         deps = [
@@ -2459,10 +2461,10 @@ cc_library(
     srcs = glob([
         "lib/Analysis/ML/*.cpp",
         "lib/Analysis/ML/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/Analysis/ML/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     deps = [
         ":Analysis",
@@ -2476,7 +2478,7 @@ cc_library(
     srcs = glob([
         "lib/Passes/*.cpp",
         "lib/Passes/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/Passes/*.h"]) + ["include/llvm-c/Transforms/PassBuilder.h"],
     copts = llvm_copts,
     deps = [
@@ -2507,7 +2509,7 @@ cc_library(
     srcs = glob([
         "lib/LTO/*.cpp",
         "lib/LTO/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/LTO/*.h",
         "include/llvm/LTO/legacy/*.h",
@@ -2551,7 +2553,7 @@ cc_library(
         "lib/ExecutionEngine/RuntimeDyld/*.h",
         "lib/ExecutionEngine/RuntimeDyld/Targets/*.cpp",
         "lib/ExecutionEngine/RuntimeDyld/Targets/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(
         [
             "include/llvm/ExecutionEngine/*.h",
@@ -2660,11 +2662,11 @@ cc_library(
     srcs = glob([
         "lib/ExecutionEngine/Orc/*.cpp",
         "lib/ExecutionEngine/Orc/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/ExecutionEngine/Orc/*.h",
         "include/llvm/ExecutionEngine/Orc/RPC/*.h",
-    ]) + [
+    ], allow_empty = True) + [
         "include/llvm-c/LLJIT.h",
         "include/llvm-c/Orc.h",
         "include/llvm-c/OrcEE.h",
@@ -2767,7 +2769,7 @@ cc_library(
     srcs = glob([
         "lib/DWARFLinker/*.cpp",
         "lib/DWARFLinker/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/DWARFLinker/*.h"]),
     copts = llvm_copts,
     deps = [
@@ -2860,7 +2862,7 @@ cc_library(
     srcs = glob([
         "lib/InterfaceStub/*.cpp",
         "lib/InterfaceStub/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/InterfaceStub/*.h",
     ]),
@@ -2911,7 +2913,7 @@ cc_library(
     srcs = glob([
         "lib/MCA/**/*.cpp",
         "lib/MCA/**/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob([
         "include/llvm/MCA/**/*.h",
     ]),
@@ -2929,7 +2931,7 @@ cc_library(
     hdrs = glob([
         "tools/llvm-mca/*.h",
         "tools/llvm-mca/Views/*.h",
-    ]),
+    ], allow_empty = True),
     strip_include_prefix = "tools/llvm-mca",
 )
 
@@ -2938,7 +2940,7 @@ cc_library(
     srcs = glob([
         "lib/XRay/*.cpp",
         "lib/XRay/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/XRay/*.h"]),
     copts = llvm_copts,
     deps = [
@@ -3008,7 +3010,7 @@ cc_library(
     ] + [
         "tools/llvm-exegesis/lib/{}/*.h".format(t)
         for t in llvm_target_exegesis
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["tools/llvm-exegesis/lib/*.h"]),
     copts = llvm_copts,
     features = [
@@ -3095,7 +3097,7 @@ cc_binary(
     srcs = glob([
         "tools/llc/*.cpp",
         "tools/llc/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3180,7 +3182,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-ar/*.cpp",
         "tools/llvm-ar/*.h",
-    ]) + ["llvm-ar-driver.cpp"],
+    ], allow_empty = True) + ["llvm-ar-driver.cpp"],
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3218,7 +3220,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-as/*.cpp",
         "tools/llvm-as/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3235,7 +3237,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-bcanalyzer/*.cpp",
         "tools/llvm-bcanalyzer/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3322,7 +3324,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-cvtres/*.cpp",
         "tools/llvm-cvtres/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3356,7 +3358,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-cxxmap/*.cpp",
         "tools/llvm-cxxmap/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3391,7 +3393,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-cxxfilt/*.cpp",
         "tools/llvm-cxxfilt/*.h",
-    ]) + ["llvm-cxxfilt-driver.cpp"],
+    ], allow_empty = True) + ["llvm-cxxfilt-driver.cpp"],
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3424,7 +3426,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-debuginfod-find/*.cpp",
         "tools/llvm-debuginfod-find/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3441,7 +3443,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-dis/*.cpp",
         "tools/llvm-dis/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3527,7 +3529,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-dwp/*.cpp",
         "tools/llvm-dwp/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3567,7 +3569,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-extract/*.cpp",
         "tools/llvm-extract/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3609,7 +3611,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-gsymutil/*.cpp",
         "tools/llvm-gsymutil/*.h",
-    ]) + ["llvm-gsymutil-driver.cpp"],
+    ], allow_empty = True) + ["llvm-gsymutil-driver.cpp"],
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3751,7 +3753,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-link/*.cpp",
         "tools/llvm-link/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3816,7 +3818,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-lto/*.cpp",
         "tools/llvm-lto/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3839,7 +3841,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-lto2/*.cpp",
         "tools/llvm-lto2/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -3976,7 +3978,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-mt/*.cpp",
         "tools/llvm-mt/*.h",
-    ]) + ["llvm-mt-driver.cpp"],
+    ], allow_empty = True) + ["llvm-mt-driver.cpp"],
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4013,7 +4015,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-nm/*.cpp",
         "tools/llvm-nm/*.h",
-    ]) + ["llvm-nm-driver.cpp"],
+    ], allow_empty = True) + ["llvm-nm-driver.cpp"],
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4096,7 +4098,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-stress/*.cpp",
         "tools/llvm-stress/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4264,7 +4266,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-profdata/*.cpp",
         "tools/llvm-profdata/*.h",
-    ]) + ["llvm-profdata-driver.cpp"],
+    ], allow_empty = True) + ["llvm-profdata-driver.cpp"],
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4448,7 +4450,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-remark-size-diff/**/*.cpp",
         "tools/llvm-remark-size-diff/**/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     includes = ["tools/llvm-reark-size-diff"],
     stamp = 0,
@@ -4466,7 +4468,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-rtdyld/*.cpp",
         "tools/llvm-rtdyld/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4508,7 +4510,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-size/*.cpp",
         "tools/llvm-size/*.h",
-    ]) + ["llvm-size-driver.cpp"],
+    ], allow_empty = True) + ["llvm-size-driver.cpp"],
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4524,7 +4526,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-split/*.cpp",
         "tools/llvm-split/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4554,7 +4556,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-strings/*.cpp",
         "tools/llvm-strings/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4582,7 +4584,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-symbolizer/*.cpp",
         "tools/llvm-symbolizer/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4608,7 +4610,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-undname/*.cpp",
         "tools/llvm-undname/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4623,7 +4625,7 @@ cc_binary(
         "tools/llvm-xray/*.cpp",
         "tools/llvm-xray/*.cc",
         "tools/llvm-xray/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4679,7 +4681,7 @@ cc_binary(
     srcs = glob([
         "tools/sancov/*.cpp",
         "tools/sancov/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4700,7 +4702,7 @@ cc_binary(
     srcs = glob([
         "tools/sanstats/*.cpp",
         "tools/sanstats/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4715,7 +4717,7 @@ cc_binary(
     srcs = glob([
         "utils/split-file/*.cpp",
         "utils/split-file/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4781,7 +4783,7 @@ cc_library(
     srcs = glob([
         "lib/Testing/Support/*.cpp",
         "lib/Testing/Support/*.h",
-    ]),
+    ], allow_empty = True),
     hdrs = glob(["include/llvm/Testing/Support/*.h"]),
     copts = llvm_copts,
     deps = [
@@ -4810,7 +4812,7 @@ cc_binary(
     srcs = glob([
         "utils/FileCheck/*.cpp",
         "utils/FileCheck/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4856,7 +4858,7 @@ cc_binary(
     srcs = glob([
         "utils/count/*.c",
         "utils/count/*.h",
-    ]),
+    ], allow_empty = True),
     stamp = 0,
 )
 
@@ -4866,7 +4868,7 @@ cc_binary(
     srcs = glob([
         "tools/lli/ChildTarget/*.cpp",
         "tools/lli/ChildTarget/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     # The tests load code into this binary that expect to see symbols
     # from libstdc++ such as __cxa_begin_catch and _ZTIi. The latter
@@ -4933,7 +4935,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-diff/*.cpp",
         "tools/llvm-diff/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4951,7 +4953,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-isel-fuzzer/*.cpp",
         "tools/llvm-isel-fuzzer/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -4997,7 +4999,7 @@ cc_binary(
     srcs = glob([
         "utils/not/*.cpp",
         "utils/not/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [":Support"],
@@ -5061,7 +5063,7 @@ cc_binary(
     srcs = glob([
         "tools/llvm-tli-checker/*.cpp",
         "tools/llvm-tli-checker/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -5108,7 +5110,7 @@ cc_binary(
     srcs = glob([
         "tools/verify-uselistorder/*.cpp",
         "tools/verify-uselistorder/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [
@@ -5128,7 +5130,7 @@ cc_binary(
     srcs = glob([
         "tools/yaml2obj/*.cpp",
         "tools/yaml2obj/*.h",
-    ]),
+    ], allow_empty = True),
     copts = llvm_copts,
     stamp = 0,
     deps = [