[libc-commits] [libc] 9894236 - [libc] Skip fuzzer as well if its dependent entrypoints are skipped.

[Siva Chandra Reddy via libc-commits]

Author: Siva Chandra Reddy
Date: 2020-06-09T21:49:50-07:00
New Revision: 9894236e705ef784bdac984ef63bb9f865efb27e

URL: https://github.com/llvm/llvm-project/commit/9894236e705ef784bdac984ef63bb9f865efb27e
DIFF: https://github.com/llvm/llvm-project/commit/9894236e705ef784bdac984ef63bb9f865efb27e.diff

LOG: [libc] Skip fuzzer as well if its dependent entrypoints are skipped.

Reviewers: asteinhauser

Subscribers: mgorny, tschuett, ecnelises, libc-commits

Tags: #libc-project

Differential Revision: https://reviews.llvm.org/D81519

Added: 
    

Modified: 
    libc/cmake/modules/LLVMLibCTestRules.cmake

Removed: 
    


################################################################################
diff  --git a/libc/cmake/modules/LLVMLibCTestRules.cmake b/libc/cmake/modules/LLVMLibCTestRules.cmake
index e33f5289c405..a30259c05382 100644
--- a/libc/cmake/modules/LLVMLibCTestRules.cmake
+++ b/libc/cmake/modules/LLVMLibCTestRules.cmake
@@ -198,6 +198,24 @@ function(add_libc_fuzzer target_name)
   endif()
 
   get_fq_target_name(${target_name} fq_target_name)
+  get_fq_deps_list(fq_deps_list ${LIBC_FUZZER_DEPENDS})
+  get_object_files_for_test(
+      link_object_files skipped_entrypoints_list ${fq_deps_list})
+  if(skipped_entrypoints_list)
+    set(msg "Skipping fuzzer target ${fq_target_name} as it has missing deps: "
+            "${skipped_entrypoints_list}.")
+    message(STATUS ${msg})
+    add_custom_target(${fq_target_name})
+
+    # A post build custom command is used to avoid running the command always.
+    add_custom_command(
+      TARGET ${fq_target_name}
+      POST_BUILD
+      COMMAND ${CMAKE_COMMAND} -E echo ${msg}
+    )
+    return()
+  endif()
+
   add_executable(
     ${fq_target_name}
     EXCLUDE_FROM_ALL
@@ -212,8 +230,6 @@ function(add_libc_fuzzer target_name)
       ${LIBC_BUILD_DIR}/include
   )
 
-  get_fq_deps_list(fq_deps_list ${LIBC_FUZZER_DEPENDS})
-  get_object_files_for_test(link_object_files ${fq_deps_list})
   target_link_libraries(${fq_target_name} PRIVATE ${link_object_files})
 
   set_target_properties(${fq_target_name}