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When linking to capnproto from another project, cmake fails to
find this package with the following error:
| CMake Error at ${RECIPE_SYSROOT}/usr/lib/cmake/CapnProto/CapnProtoTargets.cmake:176 (message):
| The imported target "CapnProto::capnp_tool" references the file
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| "${RECIPE_SYSROOT}/usr/bin/capnp"
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| but this file does not exist. Possible reasons include:
To solve this, this change includes the following:
1. Add a patch that removes the files installed (and exported) in
${bindir} from the target build. The CMake file originally verified
that these files exist when another recipe tried to use it, however
the ${RECIPE_SYSROOT} does not contain the binaries in ${bindir},
so it failed quick in the do_configure step. (This alone is enough
to link against the cross-compiled libraries of capnproto successfully,
but code-generation from capnproto definition fails)
2. Add a new bbclass for capnproto. To cross-compile an application
that uses capnproto, the application needs to be linked against the
cross-compiled version of the libraries, however the native version
of the binaries need to be used to generate C++ code from the
capnproto definitions. This class sets the correct CMake arguments, to
use the capnproto binaries from the native package, instead of looking
for the non-existent cross-compiled binaries. (These variables can
be found in ${libdir}/cmake/CapnProto/CapnProtoConfig.cmake file)
Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
9 lines
385 B
Plaintext
9 lines
385 B
Plaintext
# Inherit this class in your recipe to compile against
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# Cap'N Proto (capnproto) with CMake
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DEPENDS:append = " capnproto-native "
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DEPENDS:append:class-target = " capnproto "
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EXTRA_OECMAKE:append:class-target = " -DCAPNP_EXECUTABLE=${RECIPE_SYSROOT_NATIVE}${bindir}/capnp \
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-DCAPNPC_CXX_EXECUTABLE=${RECIPE_SYSROOT_NATIVE}${bindir}/capnpc-c++ "
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