[PATCH] cargo-c: fix debug symbols containing TMPDIR references

[Yash.Shinde@windriver.com]

From: Yash Shinde <Yash.Shinde@windriver.com>

When building cargo-c with DEBUG mode, QA checks fail due to
absolute paths from the build environment (TMPDIR) being embedded into
the debug symbols/binaries. This causes issues such as:

  ERROR: do_package_qa: File /usr/bin/.debug/cargo-capi contains reference to TMPDIR [buildpaths]
  ERROR: do_package_qa: File /usr/bin/.debug/cargo-cinstall contains reference to TMPDIR [buildpaths]
  ERROR: do_package_qa: File /usr/bin/.debug/cargo-cbuild contains reference to TMPDIR [buildpaths]
  ERROR: do_package_qa: File /usr/bin/.debug/cargo-ctest contains reference to TMPDIR [buildpaths]

To fix this, pass an additional -ffile-prefix-map option to DEBUG_PREFIX_MAP to
ensure that paths under `${CARGO_HOME}` are remapped to `${TARGET_DBGSRC_DIR}`.
This ensures debug info is reproducible and does not leak host-specific paths.

Signed-off-by: Yash Shinde <Yash.Shinde@windriver.com>
---
 meta/recipes-devtools/rust/cargo-c_0.10.16+cargo-0.91.0.bb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/meta/recipes-devtools/rust/cargo-c_0.10.16+cargo-0.91.0.bb b/meta/recipes-devtools/rust/cargo-c_0.10.16+cargo-0.91.0.bb
index fd15f02da9..5ef68e13c2 100644
--- a/meta/recipes-devtools/rust/cargo-c_0.10.16+cargo-0.91.0.bb
+++ b/meta/recipes-devtools/rust/cargo-c_0.10.16+cargo-0.91.0.bb
@@ -12,6 +12,8 @@ SRC_URI = "crate://crates.io/cargo-c/${PV};name=cargo-c \
 SRC_URI[cargo-c.sha256sum] = "17d431789b050b0fcf678455dfd5ceb7e5b45cd806140f8fe03b16b995d6cbff"
 S = "${CARGO_VENDORING_DIRECTORY}/cargo-c-${PV}"
 
+DEBUG_PREFIX_MAP += "-ffile-prefix-map=${CARGO_HOME}=${TARGET_DBGSRC_DIR}"
+
 inherit cargo cargo-update-recipe-crates pkgconfig
 
 DEPENDS = "openssl curl"
-- 
2.49.0