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-rw-r--r--ChangeLog10
-rw-r--r--doc/posix-headers/stddef.texi4
-rw-r--r--lib/stddef.in.h9
3 files changed, 23 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 7ba4369..7480874 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1 +1,11 @@
+2021-03-02 Bruno Haible <bruno@clisp.org>
+
+ stddef: Work around an interoperability problem of tcc with glibc.
+ Reported by Luca Saiu <positron@gnu.org> in
+ <https://lists.gnu.org/archive/html/bug-gnulib/2021-03/msg00011.html>.
+ * lib/stddef.in.h [__TINYC__]: In case of the special invocation
+ convention, undefine the macros that TinyCC's <stddef.h> should undefine
+ but doesn't.
+ * doc/posix-headers/stddef.texi: Mention the TinyCC bug.
+
2021-03-02 Paul Eggert <eggert@cs.ucla.edu>
diff --git a/doc/posix-headers/stddef.texi b/doc/posix-headers/stddef.texi
index dbc0103..ba27fa8 100644
--- a/doc/posix-headers/stddef.texi
+++ b/doc/posix-headers/stddef.texi
@@ -29,2 +29,6 @@ of a pointer:
AIX 7.2 with xlc in 64-bit mode.
+
+@item
+When this header file is provided by TinyCC 0.9.27 on glibc systems, it does
+not fulfil the expectations of other glibc header files.
@end itemize
diff --git a/lib/stddef.in.h b/lib/stddef.in.h
index ba6f903..590e12c 100644
--- a/lib/stddef.in.h
+++ b/lib/stddef.in.h
@@ -44,2 +44,11 @@
# @INCLUDE_NEXT@ @NEXT_STDDEF_H@
+ /* On TinyCC, make sure that the macros that indicate the special invocation
+ convention get undefined. */
+# ifdef __TINYC__
+# undef __need_wchar_t
+# undef __need_size_t
+# undef __need_ptrdiff_t
+# undef __need_NULL
+# undef __need_wint_t
+# endif
# endif

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