[libc] Fix some missing features from the hermetic test support

This patch addresses some of the flags and features that are currently
missing from the hermetic test support. This mostly just fixes the
`add_libc_test` option failing to find a few dependencies or missing
arguments from the previous unit test support.

Reviewed By: lntue

Differential Revision: https://reviews.llvm.org/D149629

libc/cmake/modules/LLVMLibCTestRules.cmake

@@ -568,6 +568,7 @@ endif()
 #     ARGS <list of command line arguments to be passed to the test>
 #     ENV <list of environment variables to set before running the test>
 #     COMPILE_OPTIONS <list of special compile options for the test>
+#     LINK_LIBRARIES <list of linking libraries for this target>
 #     LOADER_ARGS <list of special args to loaders (like the GPU loader)>
 #   )
 function(add_libc_hermetic_test test_name)
@@ -579,7 +580,7 @@ function(add_libc_hermetic_test test_name)
     "HERMETIC_TEST"
     "" # No optional arguments
     "SUITE" # Single value arguments
-    "SRCS;HDRS;DEPENDS;ARGS;ENV;COMPILE_OPTIONS;LOADER_ARGS" # Multi-value arguments
+    "SRCS;HDRS;DEPENDS;ARGS;ENV;COMPILE_OPTIONS;LINK_LIBRARIES;LOADER_ARGS" # Multi-value arguments
     ${ARGN}
   )
 
@@ -660,13 +661,15 @@ function(add_libc_hermetic_test test_name)
   target_link_options(${fq_build_target_name} PRIVATE -nostdlib -static)
   target_link_libraries(
     ${fq_build_target_name}
-    libc.startup.${LIBC_TARGET_OS}.crt1
-    LibcHermeticTestMain LibcHermeticTest
-    # The NVIDIA 'nvlink' linker does not currently support static libraries.
-    $<$<NOT:$<BOOL:${LIBC_GPU_TARGET_ARCHITECTURE_IS_NVPTX}>>:${fq_target_name}.__libc__>)
+    PRIVATE
+      ${HERMETIC_TEST_LINK_LIBRARIES}
+      libc.startup.${LIBC_TARGET_OS}.crt1
+      LibcHermeticTestMain LibcHermeticTest
+      # The NVIDIA 'nvlink' linker does not currently support static libraries.
+      $<$<NOT:$<BOOL:${LIBC_GPU_TARGET_ARCHITECTURE_IS_NVPTX}>>:${fq_target_name}.__libc__>)
   add_dependencies(${fq_build_target_name}
                    LibcHermeticTest
-                   ${HERMETIC_TEST_DEPENDS})
+                   ${fq_deps_list})
 
   # Tests on the GPU require an external loader utility to launch the kernel.
   if(TARGET libc.utils.gpu.loader)

libc/test/UnitTest/CMakeLists.txt

@@ -77,8 +77,6 @@ add_library(
   RoundingModeUtils.cpp
   RoundingModeUtils.h
 )
-target_include_directories(LibcFPTestHelpers PUBLIC ${LIBC_SOURCE_DIR})
-target_link_libraries(LibcFPTestHelpers LibcUnitTest)
 add_dependencies(
   LibcFPTestHelpers
   LibcUnitTest
@@ -93,8 +91,6 @@ add_library(
   MemoryMatcher.h
   MemoryMatcher.cpp
 )
-target_include_directories(LibcMemoryHelpers PUBLIC ${LIBC_SOURCE_DIR})
-target_link_libraries(LibcMemoryHelpers LibcUnitTest)
 add_dependencies(
   LibcMemoryHelpers
   LibcUnitTest
@@ -106,8 +102,6 @@ add_library(
   PrintfMatcher.h
   PrintfMatcher.cpp
 )
-target_include_directories(LibcPrintfHelpers PUBLIC ${LIBC_SOURCE_DIR})
-target_link_libraries(LibcPrintfHelpers LibcUnitTest)
 add_dependencies(
   LibcPrintfHelpers
   LibcUnitTest
@@ -121,12 +115,16 @@ add_library(
   ScanfMatcher.h
   ScanfMatcher.cpp
 )
-target_include_directories(LibcScanfHelpers PUBLIC ${LIBC_SOURCE_DIR})
-target_link_libraries(LibcScanfHelpers LibcUnitTest)
 add_dependencies(
   LibcScanfHelpers
   LibcUnitTest
   libc.src.__support.FPUtil.fp_bits
   libc.src.stdio.scanf_core.core_structs
   libc.test.UnitTest.string_utils
 )
+
+foreach(lib LibcFPTestHelpers LibcMemoryHelpers LibcPrintfHelpers LibcScanfHelpers)
+  target_include_directories(${lib} PUBLIC ${LIBC_SOURCE_DIR})
+  target_compile_options(${lib} PRIVATE -fno-exceptions -fno-rtti)
+target_link_libraries(${lib} LibcUnitTest)
+endforeach()