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extension: windows: Fixed linking extension example to uhd.lib

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Symtom to observed
Example of how to use a (new) feature/behavior
This commit is contained in:
mkoop 2023-02-17 16:14:21 +01:00 committed by Aki Tomita
parent 0d15d7670e
commit 8be6b24ae3
2 changed files with 39 additions and 17 deletions
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11
host/docs/extension.dox
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@ -14,17 +14,6 @@ example in the examples directory. It can be built by
Depending on your UHD installation prefix root privileges may be required for `make install`.
<b>Known issue</b>:
When using the Python API with an extension installed, `import uhd` may throw an error:
`Error: EnvironmentError: OSError: dlopen failed to load "/path/to/libextension.so"`
If this occurs, please provide the LD_PRELOAD variable with the path to the uhdlib:
export LD_PRELOAD=[UHD_PREFIX]/lib/libuhd.so
Afterwards start Python again in the same commandline.
\section extension_capabilities Capabilities of the Extension Framework
The Extension Framework attaches to multi_usrp and will work for all RFNoC-capable devices.

45
host/examples/extension_example/CMakeLists.txt
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@ -42,7 +42,7 @@ include(UHDBoost)
# need these include and link directories for the build
include_directories(
${CMAKE_SOURCE_DIR}/include
${CMAKE_CURRENT_SOURCE_DIR}/include
${Boost_INCLUDE_DIRS}
${UHD_INCLUDE_DIRS}
)
@ -55,16 +55,49 @@ list(APPEND extexample_sources
)
add_subdirectory(include)
message(STATUS "UHD Module Path (to which the extension will be linked):")
message(STATUS ${UHD_MODULE_PATH})
message(STATUS ${PROJECT_NAME} " linking against library found at:")
message(STATUS " " ${UHD_LIB_PATH})
### Make the executable #######################################################
add_library(extexample SHARED ${extexample_sources})
##set(CMAKE_BUILD_TYPE "Release")
message(STATUS "******************************************************************************")
message(STATUS "* NOTE: When building your own app, you probably need all kinds of different ")
message(STATUS "* compiler flags. This is just an example, so it's unlikely these settings ")
message(STATUS "* exactly match what you require. Make sure to double-check compiler and ")
message(STATUS "* linker flags to make sure your specific requirements are included. ")
message(STATUS "******************************************************************************")
# Shared library case: All we need to do is link against the library, and
# anything else we need (in this case, some Boost libraries):
if(NOT UHD_USE_STATIC_LIBS)
message(STATUS "Linking against shared UHD library.")
target_link_libraries(extexample ${UHD_LIBRARIES} ${Boost_LIBRARIES})
# Shared library case: All we need to do is link against the library, and
# anything else we need (in this case, some Boost libraries):
else(NOT UHD_USE_STATIC_LIBS)
message(STATUS "Linking against static UHD library.")
target_link_libraries(extexample
# We could use ${UHD_LIBRARIES}, but linking requires some extra flags,
# so we use this convenience variable provided to us
${UHD_STATIC_LIB_LINK_FLAG}
# Also, when linking statically, we need to pull in all the deps for
# UHD as well, because the dependencies don't get resolved automatically
${UHD_STATIC_LIB_DEPS}
)
endif(NOT UHD_USE_STATIC_LIBS)
### Once it's built... ########################################################
# Here, you have commands to install your program.
set(extension_target ${CMAKE_INSTALL_PREFIX}/lib/libextexample.so)
if(UNIX)
# On Linux OS install into folder and symlink to UHD_MODULE_PATH
set(extension_target ${CMAKE_INSTALL_PREFIX}/lib/libextexample.so)
install(TARGETS extexample DESTINATION lib)
install(CODE "execute_process(COMMAND bash -c \"mkdir -p ${UHD_MODULE_PATH} && ln -s -f ${extension_target} -t ${UHD_MODULE_PATH}\")")
else(UNIX)
# on other OS (Windows) install into UHD_MODULE_PATH
install(TARGETS extexample DESTINATION ${UHD_MODULE_PATH})
endif(UNIX)
install(TARGETS extexample DESTINATION lib)
install(CODE "execute_process(COMMAND bash -c \"mkdir -p ${UHD_MODULE_PATH} && ln -s -f ${extension_target} -t ${UHD_MODULE_PATH}\")")