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build(macos): Build OpenSSL from source for x86_64 cross-compile #3444

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Merged
szokeasaurusrex merged 2 commits into from
Oct 21, 2026
Merged

build(macos): Build OpenSSL from source for x86_64 cross-compile #3444

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7adcc89
build(macos): Build OpenSSL from source for x86_64 cross-compile
sentry-junior[bot] Oct 21, 2026
123bf2b
build(macos): Use curl's static-ssl instead of a direct openssl-sys dep
sentry-junior[bot] Oct 21, 2026
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28 changes: 0 additions & 28 deletions .github/workflows/build.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -84,34 +84,6 @@ jobs:
- name: Add Rustup Target
run: rustup target add ${{ matrix.target }}

# On x86_64, this environment variable specifies to the openssl-sys crate
# where to find the OpenSSL library.
- name: Set OpenSSL env (x86_64)
if: matrix.arch == 'x86_64'
run: echo "X86_64_APPLE_DARWIN_OPENSSL_DIR=${{ github.workspace }}/openssl-x86_64" >> $GITHUB_ENV

- name: Get OpenSSL cache month (x86_64)
if: matrix.arch == 'x86_64'
id: cache-date
run: echo "month=$(date +%Y-%m)" >> $GITHUB_OUTPUT

- name: Cache x86_64 OpenSSL
if: matrix.arch == 'x86_64'
id: cache-openssl-x86
uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # 6.1.0
with:
path: ${{ env.X86_64_APPLE_DARWIN_OPENSSL_DIR }}
key: openssl-x86_64-${{ runner.os }}-${{ steps.cache-date.outputs.month }}

# To cross-compile for x86_64 from an ARM-based macOS runner, we need to have the
# x86_64 OpenSSL libraries installed locally.
- name: Download x86_64 OpenSSL
if: matrix.arch == 'x86_64' && steps.cache-openssl-x86.outputs.cache-hit != 'true'
run: |
arch -x86_64 brew fetch --bottle-tag=tahoe openssl@3.5
mkdir -p $X86_64_APPLE_DARWIN_OPENSSL_DIR
tar xzf $(arch -x86_64 brew --cache --bottle-tag=tahoe openssl@3.5) -C $X86_64_APPLE_DARWIN_OPENSSL_DIR --strip-components=2

- name: Cache Dependencies
uses: swatinem/rust-cache@c19371144df3bb44fab255c43d04cbc2ab54d1c4 # 2.9.1

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7 changes: 7 additions & 0 deletions Cargo.toml
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Expand Up @@ -140,6 +140,13 @@ windows-sys = { version = "0.59.0", features = ["Win32_Storage_FileSystem"] }
[target."cfg(not(target_os = \"macos\"))".dependencies]
curl = { version = "0.4.46", features = ["static-curl", "static-ssl"] }

# On macOS, curl links the system libcurl, but `openssl-sys` still needs OpenSSL
# headers at build time. We cross-compile for Intel Macs on ARM runners, where no
# x86_64 OpenSSL is available, so `static-ssl` builds it from source. Without
# `static-curl`, libcurl stays dynamic, and the linker drops OpenSSL from the binary.
[target."cfg(all(target_os = \"macos\", target_arch = \"x86_64\"))".dependencies]
curl = { version = "0.4.46", features = ["static-ssl"] }

# We optimize the release build for size.
[profile.release]
opt-level = 2 # I obtained the smallest binary size with opt-level 2 on my system.
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