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feat: pass sysroot when cross compiling #469

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feat: pass sysroot when cross compiling #469

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7 changes: 7 additions & 0 deletions cmake/Corrosion.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -690,6 +690,13 @@ function(_add_cargo_build out_cargo_build_out_dir)
list(APPEND corrosion_cc_rs_flags "AR_${_CORROSION_RUST_CARGO_TARGET_UNDERSCORE}=${CMAKE_AR}")
endif()

# when cross compiling, the sysroot is a necessary element to pass to the compiler
if (CMAKE_CROSSCOMPILING AND NOT ANDROID)
list (
APPEND corrosion_cc_rs_flags
CFLAGS_${Rust_CARGO_TARGET}="${CMAKE_C_FLAGS} --sysroot ${CMAKE_SYSROOT}")
endif ()

# Since we instruct cc-rs to use the compiler found by CMake, it is likely one that requires also
# specifying the target sysroot to use. CMake's generator makes sure to pass --sysroot with
# CMAKE_OSX_SYSROOT. Fortunately the compilers Apple ships also respect the SDKROOT environment
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