fix for mac

Author: Tieqiong

setup.py

@@ -17,36 +17,15 @@
 
 
 def get_boost_libraries():
-    """
-    Link against both Boost.Python and Boost.Serialization
-    from the active conda env’s lib/ directory.
-    """
-    conda_prefix = os.environ.get("CONDA_PREFIX")
-    if not conda_prefix:
-        raise EnvironmentError("CONDA_PREFIX is not set; please activate your conda environment.")
-
-    libdir = Path(conda_prefix) / "lib"
-    major, minor = sys.version_info[:2]
-
-    # look for the _python_ library
-    py_cands = [f"boost_python{major}{minor}", f"boost_python{major}", "boost_python"]
-    for lib in py_cands:
-        if (libdir / f"lib{lib}.so").exists():
-            boost_py = lib
-            break
-    else:
-        raise RuntimeError(f"Could not find any of {py_cands!r} in {libdir}")
-
-    # look for the _serialization_ library
-    ser_cands = ["boost_serialization"]
-    for lib in ser_cands:
-        if (libdir / f"lib{lib}.so").exists():
-            boost_ser = lib
-            break
-    else:
-        raise RuntimeError(f"Could not find any of {ser_cands!r} in {libdir}")
-
-    return [boost_ser, boost_py]
+    base_lib = "boost_python"
+    major, minor = str(sys.version_info[0]), str(sys.version_info[1])
+    tags = [f"{major}{minor}", major, ""]
+    mttags = ["", "-mt"]
+    candidates = [base_lib + tag for tag in tags for mt in mttags] + [base_lib]
+    for lib in candidates:
+        if find_library(lib):
+            return [lib]
+    raise RuntimeError("Cannot find a suitable Boost.Python library.")
 
 
 def get_boost_config():
@@ -83,7 +62,7 @@ def get_objcryst_libraries():
     libs = []
     for fn in os.listdir(libdir):
         low = fn.lower()
-        if low.endswith(".lib") and "objcryst" in low:
+        if "objcryst" in low:
             libs.append(os.path.splitext(fn)[0])
     if not libs:
         raise RuntimeError(f"No ObjCryst libraries found in {libdir}")