[Buildroot] [PATCH v7 09/18] core: add HOST_SANITIZE_RPATH_HOOK to TARGET_FINALIZE_HOOKS
Samuel Martin
s.martin49 at gmail.com
Wed Mar 9 22:58:50 UTC 2016
This patch adds host-patchelf as a target-finalize dependency, and
introduces the HOST_SANITIZE_RPATH_HOOK hook to fix the ELF files'
RPATH from the HOST_DIR location (excluding the sysroot).
After running this hook, the RPATH from any host ELF files is relative to
the binary location itself.
Notes:
- we avoid to fix RPATH in the sysroot.
- we do not try to fix RPATH in the external toolchain installation
location as they may have been built in a way, this is already correct;
furthermore, fixing RPATH in those programs may result in breaking them.
- the whole host directory is processed because a number of
host-package install programs that could be useful in places
different from $(HOST_DIR)/{bin,sbin,usr/bin,usr/sbin}.
- the shared libraries are also processed in case they have a 'main'
function.
As a step toward a fully relocatable SDK, this change allows to get the
toolchain relocatable, but not yet the whole SDK.
Signed-off-by: Samuel Martin <s.martin49 at gmail.com>
---
changes v6->v7:
- remove the DEBUG env. var. specific handling in Makefile, now just
place the variable in the Buildroot environment, to enable debug logs.
This is documented in a follow-up patch of this series.
changes v5->v6:
- update for the new script version
- add debug mode support
changes v4->v5:
- add verbose support
changes v3->v4:
- add host-patchelf to PACKAGES instead of target-finalize (Baruch)
- add comment
changes v2->v3:
- move hook in Makefile (Baruch)
---
Makefile | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/Makefile b/Makefile
index f1de4ed..268e14e 100644
--- a/Makefile
+++ b/Makefile
@@ -616,6 +616,21 @@ endef
TARGET_FINALIZE_HOOKS += PURGE_LOCALES
endif
+# RPATH fixing
+# - The host hook sets RPATH in host ELF binaries, using relative paths to the
+# library locations.
+# - The target hook sanitizes RPATH in target ELF binaries, removing paths
+# pointing to package's build directories or the sysroot's libdirs.
+PACKAGES += host-patchelf
+
+define HOST_SANITIZE_RPATH_HOOK
+ PATCHELF=$(HOST_DIR)/usr/bin/patchelf \
+ READELF=readelf \
+ $(TOPDIR)/support/scripts/fix-rpath host $(HOST_DIR)
+endef
+
+TARGET_FINALIZE_HOOKS += HOST_SANITIZE_RPATH_HOOK
+
$(TARGETS_ROOTFS): target-finalize
target-finalize: $(PACKAGES)
--
2.7.2
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