[PATCH] package.py: skip dwarfsrcfiles for Clang LTO static libraries

[mark.yang@lge.com]

From: "mark.yang" <mark.yang@lge.com>

When using Clang toolchain with LTO enabled, static libraries (.a) contain
LLVM bitcode objects instead of ELF objects. dwarfsrcfiles cannot process
these files and fails with "not a valid ELF file" error.

Rather than catching the error message, guard the dwarfsrcfiles call by
checking for the specific conditions: static library (using is_static_lib()
magic check) + clang toolchain + lto in DISTRO_FEATURES. When all conditions
are met, skip the call silently.

Signed-off-by: mark.yang <mark.yang@lge.com>
---
 meta/lib/oe/package.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/meta/lib/oe/package.py b/meta/lib/oe/package.py
index baaa0cba02..279cd567b3 100644
--- a/meta/lib/oe/package.py
+++ b/meta/lib/oe/package.py
@@ -770,6 +770,14 @@ def parse_debugsources_from_dwarfsrcfiles_output(dwarfsrcfiles_output):
     return debugfiles.keys()
 
 def source_info(file, d, fatal=True):
+    # Skip static libraries when using Clang toolchain with LTO enabled.
+    # In this case, .a files contain LLVM bitcode instead of ELF objects,
+    # and dwarfsrcfiles cannot process them.
+    if is_static_lib(file):
+        if d.getVar('TOOLCHAIN') == "clang" and bb.utils.contains('DISTRO_FEATURES', 'lto', True, False, d):
+            bb.debug(1, "Skipping dwarfsrcfiles for Clang LTO archive: %s" % file)
+            return []
+
     cmd = ["dwarfsrcfiles", file]
     try:
         output = subprocess.check_output(cmd, universal_newlines=True, stderr=subprocess.STDOUT)