[Python-checkins] bpo-36231: Support building on macOS without /usr/include (GH-13773) (GH-14256)
Ned Deily
webhook-mailer at python.org
Thu Jun 20 02:00:00 EDT 2019
https://github.com/python/cpython/commit/c421c66a58a6caae30f0679d7e61411418e67cec
commit: c421c66a58a6caae30f0679d7e61411418e67cec
branch: 2.7
author: Ned Deily <nad at python.org>
committer: GitHub <noreply at github.com>
date: 2019-06-20T01:59:54-04:00
summary:
bpo-36231: Support building on macOS without /usr/include (GH-13773) (GH-14256)
files:
A Misc/NEWS.d/next/macOS/2019-06-03-05-49-49.bpo-36231.RfmW_p.rst
M setup.py
diff --git a/Misc/NEWS.d/next/macOS/2019-06-03-05-49-49.bpo-36231.RfmW_p.rst b/Misc/NEWS.d/next/macOS/2019-06-03-05-49-49.bpo-36231.RfmW_p.rst
new file mode 100644
index 000000000000..c82e54c12c89
--- /dev/null
+++ b/Misc/NEWS.d/next/macOS/2019-06-03-05-49-49.bpo-36231.RfmW_p.rst
@@ -0,0 +1,3 @@
+Support building Python on macOS without /usr/include installed. As of macOS
+10.14, system header files are only available within an SDK provided by
+either the Command Line Tools or the Xcode app.
diff --git a/setup.py b/setup.py
index 33cecc687573..cb47a2339cb2 100644
--- a/setup.py
+++ b/setup.py
@@ -42,18 +42,57 @@ def add_dir_to_list(dirlist, dir):
if dir is not None and os.path.isdir(dir) and dir not in dirlist:
dirlist.insert(0, dir)
+MACOS_SDK_ROOT = None
+
def macosx_sdk_root():
+ """Return the directory of the current macOS SDK.
+
+ If no SDK was explicitly configured, call the compiler to find which
+ include files paths are being searched by default. Use '/' if the
+ compiler is searching /usr/include (meaning system header files are
+ installed) or use the root of an SDK if that is being searched.
+ (The SDK may be supplied via Xcode or via the Command Line Tools).
+ The SDK paths used by Apple-supplied tool chains depend on the
+ setting of various variables; see the xcrun man page for more info.
"""
- Return the directory of the current OSX SDK,
- or '/' if no SDK was specified.
- """
+ global MACOS_SDK_ROOT
+
+ # If already called, return cached result.
+ if MACOS_SDK_ROOT:
+ return MACOS_SDK_ROOT
+
cflags = sysconfig.get_config_var('CFLAGS')
m = re.search(r'-isysroot\s+(\S+)', cflags)
- if m is None:
- sysroot = '/'
+ if m is not None:
+ MACOS_SDK_ROOT = m.group(1)
else:
- sysroot = m.group(1)
- return sysroot
+ MACOS_SDK_ROOT = '/'
+ cc = sysconfig.get_config_var('CC')
+ tmpfile = '/tmp/setup_sdk_root.%d' % os.getpid()
+ try:
+ os.unlink(tmpfile)
+ except:
+ pass
+ ret = os.system('%s -E -v - </dev/null 2>%s 1>/dev/null' % (cc, tmpfile))
+ in_incdirs = False
+ try:
+ if ret >> 8 == 0:
+ with open(tmpfile) as fp:
+ for line in fp.readlines():
+ if line.startswith("#include <...>"):
+ in_incdirs = True
+ elif line.startswith("End of search list"):
+ in_incdirs = False
+ elif in_incdirs:
+ line = line.strip()
+ if line == '/usr/include':
+ MACOS_SDK_ROOT = '/'
+ elif line.endswith(".sdk/usr/include"):
+ MACOS_SDK_ROOT = line[:-12]
+ finally:
+ os.unlink(tmpfile)
+
+ return MACOS_SDK_ROOT
def is_macosx_sdk_path(path):
"""
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