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classes/cmake: Use relative RPATHs

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In most cases, the RPATH is stripped out when the ELF file is packages,
but by then the damage is done from a reproducible perspective because
this absolute path is hashed as part of the build-id generated at link
time ([1] has a good explanation). Fortunately, newer cmake has an
option to generated relative RPATHs that use $ORIGIN to set the path, so
set it in the toolchain file.

[1]: https://gitlab.kitware.com/cmake/cmake/issues/18413

(From OE-Core rev: 44e77d3f97af4cd4ad8bc0984f093a116a830986)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Joshua Watt
2019-11-21 10:59:11 -06:00
committed by Richard Purdie
parent 73aaa52392
commit 9582fec24a
1 changed files with 3 additions and 0 deletions
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meta/classes/cmake.bbclass
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@@ -120,6 +120,9 @@ set( ENV{QT_CONF_PATH} ${WORKDIR}/qt.conf )
# directory as rpath by default
set( CMAKE_INSTALL_RPATH ${OECMAKE_RPATH} )
# Use RPATHs relative to build directory for reproducibility
set( CMAKE_BUILD_RPATH_USE_ORIGIN ON )
# Use our cmake modules
list(APPEND CMAKE_MODULE_PATH "${STAGING_DATADIR}/cmake/Modules/")