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fix: prepend Pybind11Extension flags rather than appending them. (#2808)

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This allows users to set e.g. `extra_compile_args=["-g"]` (temporarily,
for debugging purposes) and not have that get overridden by
Pybind11Extension's default `-g0`.

In order to minimize "order inversion" (not that it really matters,
though) I chose to collect all flags and add them at once (hence the
dropping of `*args`).  I also dropped flag deduplication, which seems
unneeded.
This commit is contained in:
Antony Lee 2021-01-20 00:20:30 +01:00 committed by GitHub
parent 48534089f7
commit e8c4f54316
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1 changed files with 25 additions and 18 deletions
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43
pybind11/setup_helpers.py
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@ -99,15 +99,14 @@ class Pybind11Extension(_Extension):
this is an ugly old-style class due to Distutils.
"""
def _add_cflags(self, *flags):
for flag in flags:
if flag not in self.extra_compile_args:
self.extra_compile_args.append(flag)
# flags are prepended, so that they can be further overridden, e.g. by
# ``extra_compile_args=["-g"]``.
def _add_lflags(self, *flags):
for flag in flags:
if flag not in self.extra_link_args:
self.extra_link_args.append(flag)
def _add_cflags(self, flags):
self.extra_compile_args[:0] = flags
def _add_ldflags(self, flags):
self.extra_link_args[:0] = flags
def __init__(self, *args, **kwargs):
@ -139,13 +138,17 @@ class Pybind11Extension(_Extension):
# Have to use the accessor manually to support Python 2 distutils
Pybind11Extension.cxx_std.__set__(self, cxx_std)
cflags = []
ldflags = []
if WIN:
self._add_cflags("/EHsc", "/bigobj")
cflags += ["/EHsc", "/bigobj"]
else:
self._add_cflags("-fvisibility=hidden", "-g0")
cflags += ["-fvisibility=hidden", "-g0"]
if MACOS:
self._add_cflags("-stdlib=libc++")
self._add_lflags("-stdlib=libc++")
cflags += ["-stdlib=libc++"]
ldflags += ["-stdlib=libc++"]
self._add_cflags(cflags)
self._add_ldflags(ldflags)
@property
def cxx_std(self):
@ -174,7 +177,8 @@ class Pybind11Extension(_Extension):
if not level:
return
self.extra_compile_args.append(STD_TMPL.format(level))
cflags = [STD_TMPL.format(level)]
ldflags = []
if MACOS and "MACOSX_DEPLOYMENT_TARGET" not in os.environ:
# C++17 requires a higher min version of macOS. An earlier version
@ -186,18 +190,21 @@ class Pybind11Extension(_Extension):
desired_macos = (10, 9) if level < 17 else (10, 14)
macos_string = ".".join(str(x) for x in min(current_macos, desired_macos))
macosx_min = "-mmacosx-version-min=" + macos_string
self.extra_compile_args.append(macosx_min)
self.extra_link_args.append(macosx_min)
cflags += [macosx_min]
ldflags += [macosx_min]
if PY2:
if WIN:
# Will be ignored on MSVC 2015, where C++17 is not supported so
# this flag is not valid.
self.extra_compile_args.append("/wd5033")
cflags += ["/wd5033"]
elif level >= 17:
self.extra_compile_args.append("-Wno-register")
cflags += ["-Wno-register"]
elif level >= 14:
self.extra_compile_args.append("-Wno-deprecated-register")
cflags += ["-Wno-deprecated-register"]
self._add_cflags(cflags)
self._add_ldflags(ldflags)
# Just in case someone clever tries to multithread