#!/usr/bin/env bash
# Build libhdf5 1.8.23 (the last 1.8 release) with its command-line tools, as
# the oracle for files written with `LibVer::V18` (the `libver_v18` test in
# clawhdf5-tools finds h5dump through CLAWHDF5_H5DUMP18 or this default prefix).
#
#   bash scripts/build-hdf5-1.8.sh [PREFIX]
#
# PREFIX defaults to ~/.cache/hdf5-1.8.23; sources go to PREFIX-src and the
# build tree to PREFIX-build. Reuses an existing install. Needs git, cmake, a C
# compiler and zlib headers.
set -euo pipefail
PREFIX="${1:-$HOME/.cache/hdf5-1.8.23}"
SRC="$PREFIX-src"
BUILD="$PREFIX-build"
if [ -x "$PREFIX/bin/h5dump" ]; then
    echo "reusing $PREFIX/bin/h5dump"
    "$PREFIX/bin/h5dump" --version
    exit 0
fi
if [ ! -d "$SRC" ]; then
    git clone --depth 1 --branch hdf5-1_8_23 https://github.com/HDFGroup/hdf5.git "$SRC"
fi
# 1.8 predates current compilers (GCC 14 turns its pointer-type mismatches in
# the tools into errors): pin gnu99 and demote those errors to warnings.
CFLAGS18="-w -std=gnu99 -Wno-error=incompatible-pointer-types"
CFLAGS18="$CFLAGS18 -Wno-error=implicit-function-declaration -Wno-error=int-conversion"
cmake -S "$SRC" -B "$BUILD" \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_INSTALL_PREFIX="$PREFIX" \
    -DCMAKE_C_FLAGS="$CFLAGS18" \
    -DBUILD_SHARED_LIBS=ON \
    -DBUILD_TESTING=OFF \
    -DHDF5_BUILD_TOOLS=ON \
    -DHDF5_BUILD_EXAMPLES=OFF \
    -DHDF5_BUILD_CPP_LIB=OFF \
    -DHDF5_BUILD_FORTRAN=OFF \
    -DHDF5_BUILD_HL_LIB=OFF \
    -DHDF5_BUILD_JAVA=OFF \
    -DHDF5_ENABLE_Z_LIB_SUPPORT=ON \
    -DHDF5_ENABLE_SZIP_SUPPORT=OFF
cmake --build "$BUILD" -j "${JOBS:-6}"
cmake --install "$BUILD"
"$PREFIX/bin/h5dump" --version