71 lines
2.4 KiB
Diff
71 lines
2.4 KiB
Diff
commit bfa864e1645e140da2e1aae3cf0d0ba0674f6eb5
|
|
Author: Emilio Cobos Álvarez <emilio@crisal.io>
|
|
Date: Tue Nov 12 19:18:32 2019 +0100
|
|
|
|
Don't use a custom wrapper macro around __has_include (bug 25189).
|
|
|
|
This causes issues when using clang with -frewrite-includes to e.g.,
|
|
submit the translation unit to a distributed compiler.
|
|
|
|
In my case, I was building Firefox using sccache.
|
|
|
|
See [1] for a reduced test-case since I initially thought this was a
|
|
clang bug, and [2] for more context.
|
|
|
|
Apparently doing this is invalid C++ per [cpp.cond], which mentions [3]:
|
|
|
|
> The #ifdef and #ifndef directives, and the defined conditional
|
|
> inclusion operator, shall treat __has_include and __has_cpp_attribute
|
|
> as if they were the names of defined macros. The identifiers
|
|
> __has_include and __has_cpp_attribute shall not appear in any context
|
|
> not mentioned in this subclause.
|
|
|
|
[1]: https://bugs.llvm.org/show_bug.cgi?id=43982
|
|
[2]: https://bugs.llvm.org/show_bug.cgi?id=37990
|
|
[3]: http://eel.is/c++draft/cpp.cond#7.sentence-2
|
|
|
|
Change-Id: Id4b8ee19176a9e4624b533087ba870c418f27e60
|
|
|
|
diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
|
|
index 9e840e602f815d86..3f6fe3cc8563b493 100644
|
|
--- a/misc/sys/cdefs.h
|
|
+++ b/misc/sys/cdefs.h
|
|
@@ -412,14 +412,6 @@
|
|
# define __glibc_has_attribute(attr) 0
|
|
#endif
|
|
|
|
-#ifdef __has_include
|
|
-/* Do not use a function-like macro, so that __has_include can inhibit
|
|
- macro expansion. */
|
|
-# define __glibc_has_include __has_include
|
|
-#else
|
|
-# define __glibc_has_include(header) 0
|
|
-#endif
|
|
-
|
|
#if (!defined _Noreturn \
|
|
&& (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) < 201112 \
|
|
&& !__GNUC_PREREQ (4,7))
|
|
diff --git a/sysdeps/unix/sysv/linux/bits/statx.h b/sysdeps/unix/sysv/linux/bits/statx.h
|
|
index 206878723fd37881..aaccfdc2dc03a1dc 100644
|
|
--- a/sysdeps/unix/sysv/linux/bits/statx.h
|
|
+++ b/sysdeps/unix/sysv/linux/bits/statx.h
|
|
@@ -26,11 +26,13 @@
|
|
|
|
/* Use "" to work around incorrect macro expansion of the
|
|
__has_include argument (GCC PR 80005). */
|
|
-#if __glibc_has_include ("linux/stat.h")
|
|
-# include "linux/stat.h"
|
|
-# ifdef STATX_TYPE
|
|
-# define __statx_timestamp_defined 1
|
|
-# define __statx_defined 1
|
|
+#ifdef __has_include
|
|
+# if __has_include ("linux/stat.h")
|
|
+# include "linux/stat.h"
|
|
+# ifdef STATX_TYPE
|
|
+# define __statx_timestamp_defined 1
|
|
+# define __statx_defined 1
|
|
+# endif
|
|
# endif
|
|
#endif
|
|
|