[Openmp-commits] [PATCH] D109071: [libomptarget] Set runpath on libomptarget, use that to drop LD_LIBRARY_PATH from test runner

Jon Chesterfield via Phabricator via Openmp-commits openmp-commits at lists.llvm.org
Wed Sep 1 09:36:45 PDT 2021

JonChesterfield created this revision.
JonChesterfield added reviewers: jdoerfert, grokos, gregrodgers, tianshilei1992, jhuber6, ye-luo, protze.joachim.
Herald added a subscriber: mgorny.
JonChesterfield requested review of this revision.
Herald added subscribers: openmp-commits, sstefan1.
Herald added a project: OpenMP.

Using rpath instead of LD_LIBRARY_PATH to find libomp.so and
libomptarget.so lets one rerun the already built test executables without
setting environment variables and removes the risk of the test runner picking
up different libraries to the developer debugging the failure.

rpath usually means runpath, which is not transitive, so set runpath on
libomptarget itself so that it can find the plugins located next to it,
spelled $ORIGIN. This provides sufficient functionality to drop D102043 <https://reviews.llvm.org/D102043>

  rG LLVM Github Monorepo



Index: openmp/libomptarget/test/lit.cfg
--- openmp/libomptarget/test/lit.cfg
+++ openmp/libomptarget/test/lit.cfg
@@ -85,11 +85,10 @@
     config.test_flags += " -Wl,-rpath," + config.library_dir
     config.test_flags += " -Wl,-rpath," + config.omp_host_rtl_directory
 else: # Unices
-    append_dynamic_library_path('LD_LIBRARY_PATH', config.library_dir, ":")
-    append_dynamic_library_path('LD_LIBRARY_PATH', \
-        config.omp_host_rtl_directory, ":")
+    config.test_flags += " -Wl,-rpath," + config.library_dir
+    config.test_flags += " -Wl,-rpath," + config.omp_host_rtl_directory
     if config.cuda_libdir:
-        append_dynamic_library_path('LD_LIBRARY_PATH', config.cuda_libdir, ":")
+        config.test_flags += " -Wl,-rpath," + config.cuda_libdir
     append_dynamic_library_path('LIBRARY_PATH', config.library_dir, ":")
     append_dynamic_library_path('LIBRARY_PATH', \
         config.omp_host_rtl_directory, ":")
Index: openmp/libomptarget/src/CMakeLists.txt
--- openmp/libomptarget/src/CMakeLists.txt
+++ openmp/libomptarget/src/CMakeLists.txt
@@ -30,6 +30,7 @@
 # Build libomptarget library with libdl dependency.
 add_library(omptarget SHARED ${LIBOMPTARGET_SRC_FILES})
+set_target_properties(omptarget PROPERTIES INSTALL_RPATH "$ORIGIN" BUILD_RPATH "$ORIGIN")
   # Add LLVMSupport dependency if profiling is enabled.
   # Linking with LLVM component libraries also requires

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