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[2/5] classes-recipe: add cython class

Message ID 20241105161227.2324296-2-ross.burton@arm.com
State Accepted, archived
Commit 9752da112b618362d2fe1b61c8939b8410e98553
Headers show
Series [1/5] python3-cython: add patch to prefix map source paths in generated files | expand

Commit Message

Ross Burton Nov. 5, 2024, 4:12 p.m. UTC 
Recipes that use Cython typically also do some bespoke fixup.  Add a
class to centralise the logic:

- Set CYTHON_PREFIX_MAP to stop build paths appearing in generated
  objects
- Strip "Cython Metadata" blocks from generated code that ends up in the
  -src package

Signed-off-by: Ross Burton <ross.burton@arm.com>
---
 meta/classes-recipe/cython.bbclass | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 meta/classes-recipe/cython.bbclass
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Patch

diff --git a/meta/classes-recipe/cython.bbclass b/meta/classes-recipe/cython.bbclass
new file mode 100644
index 00000000000..005bc838cc9
--- /dev/null
+++ b/meta/classes-recipe/cython.bbclass
@@ -0,0 +1,11 @@ 
+DEPENDS:append = " python3-cython-native"
+
+# Remap the build paths that appear in generated .c code
+export CYTHON_PREFIX_MAP = "${S}=${TARGET_DBGSRC_DIR} ${B}=${TARGET_DBGSRC_DIR}"
+
+do_compile[postfuncs] = "strip_cython_metadata"
+strip_cython_metadata() {
+    # Remove the Cython Metadata headers that we don't need after the build, and
+    # may contain build paths.
+    find ${B} -name "*.c" -print0 | xargs -0 sed -i -e "/BEGIN: Cython Metadata/,/END: Cython Metadata/d"
+}