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rpsdk-mix-c-rs-zig
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make rust code able to depend on core rlibs

This commit is contained in:
Triss 2025-01-20 16:45:07 +01:00
parent 40dcb115da
commit 72e1ded062
1 changed files with 14 additions and 4 deletions
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18
cmake/rust-obj.cmake
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@ -136,10 +136,16 @@ function(add_rust_object TOP_PROJECT RUST_TOP_SOURCE_FILE)
endif()
### rust compilation
set(_SHELL_SCRIPT "${CMAKE_AR} vd \"${CMAKE_CURRENT_BINARY_DIR}/lib${TARGET_NAME}.a.tmp\" \"$(${CMAKE_AR} t ${CMAKE_CURRENT_BINARY_DIR}/lib${TARGET_NAME}.a.tmp | grep \"lib${TARGET_NAME}\.${TARGET_NAME}\..*\.o\")\"")
# the compile command
add_custom_command(
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME}.obj
COMMAND ${RUSTC_BIN} ${RUST_CFLAGS} --emit=obj,dep-info=${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME}.obj.d --crate-type=staticlib -o ${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME}.obj ${RUST_TOP_SOURCE_FILE}
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME}.obj ${CMAKE_CURRENT_BINARY_DIR}/lib${TARGET_NAME}.a
COMMAND ${RUSTC_BIN} ${RUST_CFLAGS} --emit=link,dep-info=${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME}.obj.d,obj=${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME}.obj --crate-type=staticlib -o ${CMAKE_CURRENT_BINARY_DIR}/lib${TARGET_NAME}.a.tmp ${RUST_TOP_SOURCE_FILE}
# remove object file itself from the static library, so two-way references are possible.
# now the static library only contains dependency code from core etc
COMMAND bash -c ${_SHELL_SCRIPT}
COMMAND mv ${CMAKE_CURRENT_BINARY_DIR}/lib${TARGET_NAME}.a.tmp ${CMAKE_CURRENT_BINARY_DIR}/lib${TARGET_NAME}.a
BYPRODUCTS ${CMAKE_CURRENT_BINARY_DIR}/lib${TARGET_NAME}.a.tmp
DEPFILE ${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME}.obj.d
# ensures the bindgen happens before the rustc compilation
#DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/generated/rust_${TARGET_NAME}/lib${TARGET_NAME}_bindgen.rlib
@ -149,8 +155,11 @@ function(add_rust_object TOP_PROJECT RUST_TOP_SOURCE_FILE)
)
# add a virtual library that can be reused and referred to (not possible with a bare add_custom_command())
add_library(${TARGET_NAME} OBJECT ${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME}.obj)
add_library(rdep_${TARGET_NAME} OBJECT ${CMAKE_CURRENT_BINARY_DIR}/lib${TARGET_NAME}.a)
# add generated object file from the library to the code to compile
target_sources(${TOP_PROJECT} PUBLIC $<TARGET_PROPERTY:${TARGET_NAME},SOURCES>)
# also make top project depend on rdep, so stuff from eg the core crate will also get linked in
target_link_libraries(${TOP_PROJECT} ${CMAKE_CURRENT_BINARY_DIR}/lib${TARGET_NAME}.a)
### rust-to-C bindings (generate C headers from .rs, cbindgen)
# cbindgen call
@ -158,11 +167,12 @@ function(add_rust_object TOP_PROJECT RUST_TOP_SOURCE_FILE)
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/generated/rust_${TARGET_NAME}/${TARGET_NAME}.h
COMMAND ${CBINDGEN_BIN} ${CBINDGEN_CFLAGS} -d --depfile ${CMAKE_CURRENT_BINARY_DIR}/generated/rust_${TARGET_NAME}/${TARGET_NAME}.h.d -o ${CMAKE_CURRENT_BINARY_DIR}/generated/rust_${TARGET_NAME}/${TARGET_NAME}.h ${RUST_TOP_SOURCE_FILE}
DEPFILE ${CMAKE_CURRENT_BINARY_DIR}/generated/rust_${TARGET_NAME}/${TARGET_NAME}.h.d
MAIN_DEPENDENCY ${RUST_TOP_SOURCE_FILE}
MAIN_DEPENDENCY ${CMAKE_CURRENT_BINARY_DIR}/lib${TARGET_NAME}.a
#MAIN_DEPENDENCY ${RUST_TOP_SOURCE_FILE}
VERBATIM
)
# make a virtual library for the header files
add_library(rs2c_${TARGET_NAME} INTERFACE ${CMAKE_CURRENT_BINARY_DIR}/generated/rust_${TARGET_NAME}/${TARGET_NAME}.h ${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME}.obj)
add_library(rs2c_${TARGET_NAME} INTERFACE ${CMAKE_CURRENT_BINARY_DIR}/generated/rust_${TARGET_NAME}/${TARGET_NAME}.h) # ${CMAKE_CURRENT_BINARY_DIR}/${TARGET_NAME}.obj)
# add dependency to ensure build order and stuff
target_link_libraries(${TOP_PROJECT} rs2c_${TARGET_NAME})