feature/android ad90fe7db73 2/3: Check in missing files

[Po Lu]

branch: feature/android
commit ad90fe7db73f342f5df207f19f5b345ccb42bad8
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Check in missing files
    
    * .gitignore:
    * cross/lib/_Noreturn.h (_Noreturn): Add missing gnulib files.
---
 .gitignore            |  2 ++
 cross/lib/_Noreturn.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+)

diff --git a/.gitignore b/.gitignore
index 6ca011312e9..a0fd1339ebb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -87,6 +87,7 @@ lib/std*.h
 lib/math.h
 !lib/std*.in.h
 !lib/stdio-impl.h
+!lib/_Noreturn.h
 lib/string.h
 lib/sys/
 lib/time.h
@@ -116,6 +117,7 @@ cross/lib/signal.h
 cross/lib/std*.h
 !cross/lib/std*.in.h
 !cross/lib/stdio-impl.h
+!cross/lib/_Noreturn.h
 cross/lib/math.h
 cross/lib/string.h
 cross/lib/sys/
diff --git a/cross/lib/_Noreturn.h b/cross/lib/_Noreturn.h
new file mode 100644
index 00000000000..6ecea98b54a
--- /dev/null
+++ b/cross/lib/_Noreturn.h
@@ -0,0 +1,50 @@
+/* A C macro for declaring that a function does not return.
+   Copyright (C) 2011-2023 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Lesser General Public License as published
+   by the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+#ifndef _Noreturn
+# if (defined __cplusplus \
+      && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
+          || (defined _MSC_VER && 1900 <= _MSC_VER)) \
+      && 0)
+    /* [[noreturn]] is not practically usable, because with it the syntax
+         extern _Noreturn void func (...);
+       would not be valid; such a declaration would only be valid with 'extern'
+       and '_Noreturn' swapped, or without the 'extern' keyword.  However, some
+       AIX system header files and several gnulib header files use precisely
+       this syntax with 'extern'.  */
+#  define _Noreturn [[noreturn]]
+# elif (defined __clang__ && __clang_major__ < 16 \
+        && defined _GL_WORK_AROUND_LLVM_BUG_59792)
+   /* Compile with -D_GL_WORK_AROUND_LLVM_BUG_59792 to work around
+      that rare LLVM bug, though you may get many false-alarm warnings.  */
+#  define _Noreturn
+# elif ((!defined __cplusplus || defined __clang__) \
+        && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
+            || (!defined __STRICT_ANSI__ \
+                && (4 < __GNUC__ + (7 <= __GNUC_MINOR__) \
+                    || (defined __apple_build_version__ \
+                        ? 6000000 <= __apple_build_version__ \
+                        : 3 < __clang_major__ + (5 <= __clang_minor__))))))
+   /* _Noreturn works as-is.  */
+# elif (2 < __GNUC__ + (8 <= __GNUC_MINOR__) || defined __clang__ \
+        || 0x5110 <= __SUNPRO_C)
+#  define _Noreturn __attribute__ ((__noreturn__))
+# elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
+#  define _Noreturn __declspec (noreturn)
+# else
+#  define _Noreturn
+# endif
+#endif