fix(mac/gcc/g++): use classic linker with gnu compilers on c/c++ files

autotest/test_build.py

@@ -1,10 +1,11 @@
 import os
 import sys
 import time
+from platform import system
 
 import pytest
 from flaky import flaky
-from modflow_devtools.misc import get_ostag, set_dir
+from modflow_devtools.misc import get_ostag, set_dir, set_env
 
 import pymake
 
@@ -65,9 +66,15 @@ def build_with_makefile(target, path, fc):
 @pytest.mark.parametrize("target", targets)
 def test_build(function_tmpdir, target: str) -> None:
     with set_dir(function_tmpdir):
+        pm = pymake.Pymake(verbose=True)
+        pm.target = target
+        pm.inplace = True
+        if system() == "Darwin":
+            pm.syslibs = "-Wl,-ld_classic"
         assert (
             pymake.build_apps(
                 target,
+                pm,
                 verbose=True,
                 clean=False,
             )
@@ -79,7 +86,10 @@ def test_build(function_tmpdir, target: str) -> None:
 @flaky(max_runs=RERUNS)
 @pytest.mark.parametrize("target", targets_meson)
 def test_meson_build(function_tmpdir, target: str) -> None:
-    with set_dir(function_tmpdir):
+    kwargs = {}
+    if system() == "Darwin":
+        kwargs["LDFLAGS"] = "-Wl,-ld_classic"
+    with set_dir(function_tmpdir), set_env(**kwargs):
         assert (
             pymake.build_apps(
                 target,
@@ -103,6 +113,8 @@ def test_makefile_build(function_tmpdir, target: str) -> None:
     pm.inplace = True
     pm.dryrun = True
     pm.makeclean = False
+    if system() == "Darwin":
+        pm.syslibs = "-Wl,-ld_classic"
 
     with set_dir(function_tmpdir):
         pm.download_target(target)

autotest/test_gridgen.py

@@ -1,6 +1,6 @@
-import os
 import pathlib as pl
 import subprocess
+from os import environ
 from platform import system
 
 import pytest
@@ -30,8 +30,10 @@ def pm(module_tmpdir, target) -> pymake.Pymake:
     pm = pymake.Pymake(verbose=True)
     pm.target = str(target)
     pm.appdir = str(module_tmpdir)
-    pm.cc = os.environ.get("CXX", "g++")
-    pm.fc = os.environ.get("FC", "gfortran")
+    pm.cc = environ.get("CXX", "g++")
+    pm.fc = environ.get("FC", "gfortran")
+    if system() == "Darwin":
+        pm.syslibs = "-Wl,-ld_classic"
     pm.inplace = True
     pm.makeclean = True
     yield pm