fix(runtime-c-api) Set the install name of the dylib to @rpath.
#474
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```sh $ objdump -macho -dylib-id libwasmer_runtime_c_api.dylib libwasmer_runtime_c_api.dylib: /Users/distiller/project/target/release/deps/libwasmer_runtime_c_api.dylib ``` we observe that the dylib ID (aka install name) is set to `/Users/distiller/project/target/release/deps/libwasmer_runtime_c_api.dylib`, which is valid only in the context of CircleCI. This patch changes the dylib ID to `@rpath/libwasmer_runtime_c_api.dylib`, which can be then changed by the linker option `-rpath` (use `-Wl,-rpath,$value` with the compiler to send the `-rpath` value to the linker). This is super useful when dynamically linking libraries against another language.
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This patch depends on wasmerio/wasmer#474, which fixes the dylib ID for macOS to use `@rpath`. This patch renames the `just go` recipe to `just build`. The `just build` recipe compiles the Rust dynamic library only when required, i.e. when the `libwasmer_runtime_c_api.*` file is absent from the source tree. This patch also updates `bridge.go` to specify the `rpath` to the linker with `-Wl,-rpath`. On macOS, the solution would be to set `rpath` to `@executable_path` but since https://nvd.nist.gov/vuln/detail/CVE-2018-6574, some flags are disabled (see https://github.com/golang/go/wiki/InvalidFlag for more information). Hopefully for us, cgo has this special `${SRCDIR}` variable (see https://golang.org/cmd/cgo/#hdr-Using_cgo_with_the_go_command), which is a possible alternative.
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474: fix(runtime-c-api) Set the install name of the dylib to `@rpath`. r=Hywan a=Hywan ```sh $ objdump -macho -dylib-id libwasmer_runtime_c_api.dylib libwasmer_runtime_c_api.dylib: /Users/distiller/project/target/release/deps/libwasmer_runtime_c_api.dylib ``` we observe that the dylib ID (aka install name) is set to `/Users/distiller/project/target/release/deps/libwasmer_runtime_c_api.dylib`, which is valid only in the context of CircleCI. This patch changes the dylib ID to `@rpath/libwasmer_runtime_c_api.dylib`, which can be then changed by the linker option `-rpath` (use `-Wl,-rpath,$value` with the compiler to send the `-rpath` value to the linker). This is super useful when dynamically linking libraries against another language. Having the dylib ID already set to `@rpath` avoid any build system to call `install_name_tool` manually, which isn't always possible (e.g. in Go with cgo where we can only pass options to the compiler with `LDFLAGS`, it's impossible to run any arbitrary command). Co-authored-by: Ivan Enderlin <ivan.enderlin@hoa-project.net>
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12: feat(runtime) Use dynamic libraries instead of compiling the runtime r=Hywan a=Hywan Dependency: wasmerio/wasmer#474. This sequence of patches aims at using dynamic libraries for the runtime. It avoids the need to compile the runtime (with `rustc`/`cargo`) when installing the Go library. Co-authored-by: Ivan Enderlin <ivan.enderlin@hoa-project.net>
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we observe that the dylib ID (aka install name) is set to
/Users/distiller/project/target/release/deps/libwasmer_runtime_c_api.dylib,which is valid only in the context of CircleCI.
This patch changes the dylib ID to
@rpath/libwasmer_runtime_c_api.dylib, which can be then changed bythe linker option
-rpath(use-Wl,-rpath,$valuewith the compilerto send the
-rpathvalue to the linker).This is super useful when dynamically linking libraries against
another language. Having the dylib ID already set to
@rpathavoid anybuild system to call
install_name_toolmanually, which isn't alwayspossible (e.g. in Go with cgo where we can only pass options to the
compiler with
LDFLAGS, it's impossible to run any arbitrary command).