MAINT: Be more robust wrt f2py flags

Author: HaoZeke

numpy/f2py/_backends/_meson.py

@@ -223,11 +223,11 @@ def _prepare_sources(mname, sources, bdir):
 def _get_flags(fc_flags):
     flag_values = []
     flag_pattern = re.compile(r"--f(77|90)flags=(.*)")
-
     for flag in fc_flags:
         match_result = flag_pattern.match(flag)
         if match_result:
             values = match_result.group(2).strip().split()
+            values = [val.strip("'\"") for val in values]
             flag_values.extend(values)
     # Hacky way to preserve order of flags
     unique_flags = list(dict.fromkeys(flag_values))

numpy/f2py/f2py2e.py

@@ -635,6 +635,7 @@ def run_compile():
         r'--((f(90)?compiler(-exec|)|compiler)=|help-compiler)')
     flib_flags = [_m for _m in sys.argv[1:] if _reg3.match(_m)]
     sys.argv = [_m for _m in sys.argv if _m not in flib_flags]
+    # TODO: Once distutils is dropped completely, i.e. min_ver >= 3.12, unify into --fflags
     reg_f77_f90_flags = re.compile(r'--f(77|90)flags=')
     reg_distutils_flags = re.compile(r'--((f(77|90)exec|opt|arch)=|(debug|noopt|noarch|help-fcompiler))')
     fc_flags = [_m for _m in sys.argv[1:] if reg_f77_f90_flags.match(_m)]

numpy/f2py/tests/test_regression.py

@@ -130,8 +130,8 @@ def test_gh25784():
             [util.getpath("tests", "src", "regression", "f77fixedform.f95")],
             options=[
                 # Meson will collect and dedup these to pass to fortran_args:
-                "--f77flags='-ffixed-form'",
-                "--f90flags='-ffixed-form'",
+                "--f77flags='-ffixed-form -O2'",
+                "--f90flags=\"-ffixed-form -Og\"",
             ],
             module_name="Blah",
         )