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| author | Rich Felker <dalias@aerifal.cx> | 2019-03-12 15:24:00 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2019-03-12 15:24:00 -0400 |
| commit | f368d9fd26ae002fe2fce20add4cb2b806f48972 (patch) | |
| tree | fc3f6dff04f55277566a5a69c1f2acfb587855b3 /src/include | |
| parent | 50cd02386b152bb39a1a9d1edba3fdcda7771a4c (diff) | |
| download | musl-f368d9fd26ae002fe2fce20add4cb2b806f48972.tar.gz | |
make FILE a complete type for pre-C11 standard profiles
C11 removed the requirement that FILE be a complete type, which was
deemed erroneous, as part of the changes introduced by N1439 regarding
completeness of types (see footnote 6 for specific mention of FILE).
however the current version of POSIX is still based on C99 and
incorporates the old requirement that FILE be a complete type.
expose an arbitrary, useless complete type definition because the
actual object used to represent FILE streams cannot be public/ABI.
thanks to commit 13d1afa46f8098df290008c681816c9eb89ffbdb, we now have
a framework for suppressing the public complete-type definition of FILE
when stdio.h is included internally, so that a different internal
definition can be provided. this is perfectly well-defined, since the
same struct tag can refer to different types in different translation
units. it would be a problem if the implementation were accessing the
application's FILE objects or vice versa, but either would be
undefined behavior.
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/stdio.h | 2 | ||||
| -rw-r--r-- | src/include/wchar.h | 9 |
2 files changed, 11 insertions, 0 deletions
diff --git a/src/include/stdio.h b/src/include/stdio.h index 534c6907..fae3755b 100644 --- a/src/include/stdio.h +++ b/src/include/stdio.h @@ -1,6 +1,8 @@ #ifndef STDIO_H #define STDIO_H +#define __DEFINED_struct__IO_FILE + #include "../../include/stdio.h" #undef stdin diff --git a/src/include/wchar.h b/src/include/wchar.h new file mode 100644 index 00000000..79f5d0e7 --- /dev/null +++ b/src/include/wchar.h @@ -0,0 +1,9 @@ +#ifndef WCHAR_H +#define WCHAR_H + +#define __DEFINED_struct__IO_FILE + +#include "../../include/wchar.h" + +#endif + |