[3.11] gh-101778: Fix build error when there's a dangling symlink in the directory containing "ffi.h" (#113466)

ronaldoussoren · web-flow · commit 0eea5c04b875 · 2023-12-26T10:05:48.000+01:00
gh-101778: Fix build error when there's a dangling symlink in the directory containing "ffi.h"
diff --git a/Misc/NEWS.d/next/Build/2023-12-25-10-06-59.gh-issue-101778.JfhRkx.rst b/Misc/NEWS.d/next/Build/2023-12-25-10-06-59.gh-issue-101778.JfhRkx.rst
@@ -0,0 +1,2 @@
+Fix build error when there's a dangling symlink in the directory containing
+``ffi.h``.
diff --git a/setup.py b/setup.py
@@ -224,6 +224,7 @@ def is_macosx_sdk_path(path):
 
 def grep_headers_for(function, headers):
     for header in headers:
+        if not os.path.exists(header): continue
         with open(header, 'r', errors='surrogateescape') as f:
             if function in f.read():
                 return True

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+Fix build error when there's a dangling symlink in the directory containing`
	`2`	+``ffi.h``.