blob: d17a8f10335cb61671b2d4194f5e636f7719d25c [file] [log] [blame]
# Additional interop for things like macros and inlined functions.
add_library(rust_wrapper STATIC rust_wrapper.c)
target_link_libraries(rust_wrapper crypto)
# Generate architecture-specific wrappers. bindgen must be called from
# ${CMAKE_BINARY_DIR}, with the output path as a relative path. bindgen writes
# the depfile using the same syntax as the command-line argument, and ninja
# requires a path relative to the top-level build directory.
set(wrapper wrapper_${RUST_BINDINGS}.rs)
binary_dir_relative_path(${wrapper} wrapper_relative)
binary_dir_relative_path(${wrapper}.d depfile_relative)
add_custom_command(
OUTPUT ${wrapper}
COMMAND ${BINDGEN_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/wrapper.h
-o ${wrapper_relative}
--depfile=${depfile_relative}
--no-derive-default
--enable-function-attribute-detection
--use-core
--default-macro-constant-type=signed
--rustified-enum=point_conversion_form_t
# These regexes need to accept both / and \ to handle Windows file
# path differences, due a bindgen issue. See
# https://crbug.com/boringssl/595. Ideally, we would write [/\\], but
# there are many layers of escaping here. First, CMake interprets
# backslashes. Then CMake generates a Ninja or Make file. That, in
# turn, uses the shell on POSIX, and does something else on Windows.
#
# It is unlikely that every layer here has sufficiently well-defined
# escaping and correctly handled the next layer's escaping. On top of
# that, we'd likely need to detect Windows vs POSIX hosts and change
# the input. Instead, just use [[:punct:]] which is more permissive
# than necessary, but we only need to exclude unwanted libc headers.
#
# If bindgen ever supports some file-based config (see
# https://github.com/rust-lang/rust-bindgen/issues/2508), we can
# switch to that.
--allowlist-file=".*[[:punct:]]include[[:punct:]]openssl[[:punct:]].*\\.h"
--allowlist-file=".*[[:punct:]]rust_wrapper\\.h"
-- # these are LLVM arg passthroughs
-I${PROJECT_SOURCE_DIR}/include
# https://doc.rust-lang.org/nightly/rustc/platform-support.html
--target=${RUST_BINDINGS}
DEPENDS wrapper.h
DEPFILE ${CMAKE_CURRENT_BINARY_DIR}/${wrapper}.d
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
)
add_custom_target(bssl_sys ALL DEPENDS ${wrapper})