bf379a6268
Header-only Eigen 3.4.0 C++ linear algebra library, downloaded from GitLab release. Exposes INCLUDE_DIR for scons integration. Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
35 lines
839 B
Bash
Executable File
35 lines
839 B
Bash
Executable File
#!/usr/bin/env bash
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set -e
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DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null && pwd)"
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cd "$DIR"
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VERSION="3.4.0"
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INSTALL_DIR="$DIR/eigen/install"
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# Idempotent: skip if already present
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if [ -d "$INSTALL_DIR/eigen3/Eigen" ]; then
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echo "eigen already present, skipping download."
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exit 0
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fi
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TARBALL="eigen-${VERSION}.tar.gz"
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URL="https://gitlab.com/libeigen/eigen/-/archive/${VERSION}/${TARBALL}"
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echo "Downloading Eigen ${VERSION} ..."
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curl -fSL -o "$TARBALL" "$URL"
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echo "Extracting headers ..."
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rm -rf "$INSTALL_DIR"
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mkdir -p "$INSTALL_DIR/eigen3"
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# Extract only the Eigen/ and unsupported/Eigen/ header directories
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tar --strip-components=1 -xzf "$TARBALL" -C "$INSTALL_DIR/eigen3" \
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"eigen-${VERSION}/Eigen" \
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"eigen-${VERSION}/unsupported"
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rm -f "$TARBALL"
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echo "Installed eigen to $INSTALL_DIR"
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du -sh "$INSTALL_DIR"
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