Could not find openssl on build (fix included)

[Sergey Matveychuk]

$ git rev-parse --short HEAD
721440b
$ rustc --version
rustc 1.73.0 (cc66ad468 2023-10-03)
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.3 LTS
Release: 22.04
Codename: jammy
$ rustc --print cfg
debug_assertions
panic="unwind"
target_arch="x86_64"
target_endian="little"
target_env="gnu"
target_family="unix"
target_feature="fxsr"
target_feature="sse"
target_feature="sse2"
target_has_atomic="16"
target_has_atomic="32"
target_has_atomic="64"
target_has_atomic="8"
target_has_atomic="ptr"
target_os="linux"
target_pointer_width="64"
target_vendor="unknown"
unix
$ dpkg -l libssl-dev
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-================-=================-============-================================================
ii libssl-dev:amd64 3.0.2-0ubuntu1.10 amd64 Secure Sockets Layer toolkit - development files
$ cargo build --release
...
running: "cc" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-m64" "-march=x86-64" "-mtune=generic" "-O2" "-pipe" "-fno-plt" "-fexceptions" "-Wp,-D_FORTIFY_SOURCE=2" "-Wformat" "-Werror=format-security" "-fstack-clash-protection" "-fcf-protection" "-I" "/usr/include" "-E" "build/expando.c"
cargo:warning=build/expando.c:4:24: error: pasting "RUST_VERSION_OPENSSL_" and "(" does not give a valid preprocessing token
cargo:warning= 4 | #define VERSION2(n, v) RUST_VERSION_##n##_##v
cargo:warning= | ^~~~~~~~~~~~~
cargo:warning=build/expando.c:5:23: note: in expansion of macro ‘VERSION2’
cargo:warning= 5 | #define VERSION(n, v) VERSION2(n, v)
cargo:warning= | ^~~~~~~~
cargo:warning=build/expando.c:10:1: note: in expansion of macro ‘VERSION’
cargo:warning= 10 | VERSION(OPENSSL, OPENSSL_VERSION_NUMBER)
cargo:warning= | ^~~~~~~
exit status: 1

--- stderr
thread 'main' panicked at '
Header expansion error:
Error { kind: ToolExecError, message: "Command "cc" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-m64" "-march=x86-64" "-mtune=generic" "-O2" "-pipe" "-fno-plt" "-fexceptions" "-Wp,-D_FORTIFY_SOURCE=2" "-Wformat" "-Werror=format-security" "-fstack-clash-protection" "-fcf-protection" "-I" "/usr/include" "-E" "build/expando.c" with args "cc" did not execute successfully (status code exit status: 1)." }

Failed to find OpenSSL development headers.

You can try fixing this setting the OPENSSL_DIR environment variable
pointing to your OpenSSL installation or installing OpenSSL headers package
specific to your distribution:

  # On Ubuntu
  sudo apt-get install libssl-dev
  # On Arch Linux
  sudo pacman -S openssl
  # On Fedora
  sudo dnf install openssl-devel

---

I could easily fix it with adding 'openssl = { version = "0.10", features = ["vendored"] }' in Cargo.toml in [dependencies] target.