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build: CGO_ENABLED when building for macOS 

Normally when we cross-compile we do so without CGo, because we don't have
suitable C headers available for systems other than the host.

However, building for macOS on macOS is special because there are
sufficient headers available on darwin_amd64 to build for both
darwin_amd64 _and_ darwin_arm64. Also, we _must_ use CGo on macOS because
the system resolver is only available via darwin's libc, and so building
without CGo produces executables that don't resolve hostnames correctly.

This is a conditional in bash to avoid having to duplicate the entire
step. Perhaps later we'll find a more general version of this which can
avoid the special case, but this is sufficient for the moment.
This commit is contained in:
Martin Atkins 2022-01-05 15:10:05 -08:00
parent 087c2f06ee
commit 4ec1feaa3d
1 changed files with 9 additions and 0 deletions
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9
.github/workflows/build.yml vendored
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@ -147,8 +147,17 @@ jobs:
env:
GOOS: ${{ matrix.goos }}
GOARCH: ${{ matrix.goarch }}
ACTIONSOS: ${{ matrix.runson }}
run: |
mkdir dist out
if [ "$ACTIONSOS" == "macos-latest" ] && [ "$GOOS" == "darwin" ]; then
# When building for macOS _on_ macOS we must force CGo to get
# correct hostname resolution behavior. (This must be conditional
# because other cross-compiles won't have suitable headers
# available to use CGo; darwin_amd64 has suitable headers to
# cross-build for darwin_arm64.)
export CGO_ENABLED=1
fi
go build -ldflags "-w -s" -o dist/ .
zip -r -j out/${{ env.PKG_NAME }}_${{ needs.get-product-version.outputs.product-version }}_${{ matrix.goos }}_${{ matrix.goarch }}.zip dist/