[PATCH V3] perf: make a copy of kernel source to perf workdir

[PATCH V3] perf: make a copy of kernel source to perf workdir

[Hongxu Jia]

Since perf contaminates linux shared workdir, it probably caused
kernel-devsrc compile failure at world build.
...
|0 blocks
|cpio: ./tools/perf/arch/arm/util/sedr7ORqk: Cannot stat:
No such file or directory
|0 blocks
...
cpio tried to find a file at ${S}/tools/perf and failed
if the input list is not valid.

Make a copy of kernel shared source directory into a perf workdir
could fix the issue.

Drop `Fix for rebuilding' which is obsolete

[YOCTO #10880]

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
---
 meta/recipes-kernel/perf/perf.bb | 31 ++++++++++++++++++++++++++-----
 1 file changed, 26 insertions(+), 5 deletions(-)

diff --git a/meta/recipes-kernel/perf/perf.bb b/meta/recipes-kernel/perf/perf.bb
index 872b5f0..fb4e3ac 100644
--- a/meta/recipes-kernel/perf/perf.bb
+++ b/meta/recipes-kernel/perf/perf.bb
@@ -61,7 +61,7 @@ export PERL_ARCHLIB = "${STAGING_LIBDIR}${PERL_OWN_DIR}/perl/${@get_perl_version
 
 inherit kernelsrc
 
-B = "${WORKDIR}/${BPN}-${PV}"
+S = "${WORKDIR}/${BP}"
 SPDX_S = "${S}/tools/perf"
 
 # The LDFLAGS is required or some old kernels fails due missing
@@ -97,6 +97,16 @@ EXTRA_OEMAKE += "\
     'infodir=${@os.path.relpath(infodir, prefix)}' \
 "
 
+PERF_SRC ?= "Makefile \
+             tools/arch \
+             tools/build \
+             tools/include \
+             tools/lib \
+             tools/Makefile \
+             tools/perf \
+             tools/scripts \
+"
+
 PERF_EXTRA_LDFLAGS = ""
 
 # MIPS N32
@@ -119,11 +129,22 @@ do_install() {
 	fi
 }
 
-do_configure_prepend () {
-    # Fix for rebuilding
-    rm -rf ${B}/
-    mkdir -p ${B}/
+do_configure[prefuncs] += "copy_perf_source_from_kernel"
+python copy_perf_source_from_kernel() {
+    sources = (d.getVar("PERF_SRC") or "").split()
+    src_dir = d.getVar("STAGING_KERNEL_DIR")
+    dest_dir = d.getVar("S")
+    bb.utils.mkdirhier(dest_dir)
+    for s in sources:
+        src = oe.path.join(src_dir, s)
+        dest = oe.path.join(dest_dir, s)
+        if os.path.isdir(src):
+            oe.path.copyhardlinktree(src, dest)
+        else:
+            bb.utils.copyfile(src, dest)
+}
 
+do_configure_prepend () {
     # If building a multlib based perf, the incorrect library path will be
     # detected by perf, since it triggers via: ifeq ($(ARCH),x86_64). In a 32 bit
     # build, with a 64 bit multilib, the arch won't match and the detection of a 
-- 
2.7.4