Add `LTTNG_UST_MPI_CLANG_LIBRARY_FILE` environment variable

This allows a user to set the explicit path to `libclang.so` in cases
where the file name doesn't match the default for the dynamic loader.

E.g.

```
LTTNG_UST_MPI_CLANG_LIBRARY_FILE=/path/to/libclang.so.16 make
```

Signed-off-by: Kienan Stewart <kstewart@efficios.com>

diff --git a/lttng-auto-mpi-wrappers b/lttng-auto-mpi-wrappers
index e6af7860f3f7a8aba40eea049c8da7e42b7e0039..89f41b0b49723618993da3ad9fa65f8bcf195a19 100755 (executable)
--- a/lttng-auto-mpi-wrappers
+++ b/lttng-auto-mpi-wrappers
@@ -11,6 +11,7 @@
 # Require: python-clang (libclang)
 
 import argparse
+import os
 import re
 
 from string import Template
@@ -67,6 +68,9 @@ extra_works = {
 
 def main():
 
+    if os.getenv("LTTNG_UST_MPI_CLANG_LIBRARY_FILE", None) is not None:
+        clang.cindex.Config.set_library_file(os.getenv("LTTNG_UST_MPI_CLANG_LIBRARY_FILE"))
+
     parser = argparse.ArgumentParser(prog="lttng-ust-auto-mpi")
 
     parser.add_argument("api",

diff --git a/lttng-auto-ust-api b/lttng-auto-ust-api
index b0597b9f499438fc8147e45a0e42f48aa29319fa..9b76039307c3eff3f23f07f38d25f66319f7f373 100755 (executable)
--- a/lttng-auto-ust-api
+++ b/lttng-auto-ust-api
@@ -730,6 +730,9 @@ def main():
     global IGNORE
     global PROVIDER
 
+    if os.getenv("LTTNG_UST_MPI_CLANG_LIBRARY_FILE", None) is not None:
+        clang.cindex.Config.set_library_file(os.getenv("LTTNG_UST_MPI_CLANG_LIBRARY_FILE"))
+
     parser = argparse.ArgumentParser(prog="lttng-ust-autogen-api",
                                      description="Generate LTTng classes and tracepoint definitions")