configure

#!/bin/sh
# mFES configure script
# Checks that build dependencies are available.

set -e

echo "mFES configure"
echo "=============="
echo ""

# ─── Compilers ──────────────────────────────────────────────────────────
CC=${CC:-gcc}
CXX=${CXX:-g++}

missing=""

check_compiler() {
    var=$1
    name=$2
    path=$(eval echo \$$var)
    if command -v "$path" >/dev/null 2>&1; then
        echo "  $name : $path ($(command -v "$path"))"
    else
        echo "  $name : $path [NOT FOUND]"
        missing="$missing $var"
    fi
}

check_cmd() {
    cmd=$1
    label=$2
    if command -v "$cmd" >/dev/null 2>&1; then
        echo "  $label: $cmd ($(command -v "$cmd"))"
    else
        echo "  $label: $cmd [NOT FOUND]"
        missing="$missing $cmd"
    fi
}

echo "--- Build tools ---"
check_compiler CC  "C compiler"
check_compiler CXX "C++ compiler"
check_cmd make "make"
echo ""

# ─── Triangle (bundled) ────────────────────────────────────────────────
echo "--- Mesh generator ---"
echo "  Triangle : bundled (FEpre/iormesh-src/triangle.c)"
echo ""

# ─── MATLAB / Octave ────────────────────────────────────────────────────
echo "--- Runtime ---"
if command -v matlab >/dev/null 2>&1; then
    matlab_bin=$(command -v matlab)
    echo "  MATLAB   : $matlab_bin"
elif command -v octave >/dev/null 2>&1; then
    echo "  Octave   : $(command -v octave)"
    echo "  [note] Octave is slower than MATLAB for large meshes."
else
    echo "  MATLAB   : [NOT FOUND]"
    echo "  Octave   : [NOT FOUND]"
    echo "  [warn] No MATLAB or Octave found. The m-Files need one to run."
    echo "         Set MATLAB=<path> or OCTAVE=<path> and re-run configure."
fi
echo ""

# ─── Result ─────────────────────────────────────────────────────────────
echo "--- Result ---"
if [ -z "$missing" ]; then
    echo "  All build dependencies found."
    echo ""
    echo "  Run 'make' to build IOrMesh and Triangle."
    exit 0
else
    echo "  Missing:$missing"
    echo ""
    echo "  Install the missing tools and re-run configure,"
    echo "  or set CC=/path/to/gcc CXX=/path/to/g++ and re-run."
    exit 1
fi