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| author | Jonathan Wakely <jwakely@redhat.com> | 2022-05-13 14:16:34 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2022-05-16 16:48:51 +0100 |
| commit | 21244c70c24db4b3bd7a2169a7a48f637cad5930 (patch) | |
| tree | b7d015c3fb910960a62e6be834853e8da75a13b1 | |
| parent | 61a87530108ec9181e1b18a9b727ec3cc3ba7532 (diff) | |
| download | glibc-21244c70c24db4b3bd7a2169a7a48f637cad5930.zip glibc-21244c70c24db4b3bd7a2169a7a48f637cad5930.tar.gz glibc-21244c70c24db4b3bd7a2169a7a48f637cad5930.tar.bz2 | |
sys/cdefs.h: Do not require C++ compilers to define __STDC__
The check for an ISO C compiler assumes that anything GCC-like will
define __STDC__, even if it's actually a C++ compiler. That's currently
true for G++ and compilers like clang++ that also define __GNUC__, but
it might not always be true.
The C++ standard leaves it implementation-defined whether or not
__STDC__ is defined by C++ compilers. And really the check should be
"ISO C or ISO C++ conforming compiler" anyway. So only give an error if
__GNUC__ is defined and neither __STDC__ nor __cplusplus is defined.
Reviewed-by: Fangrui Song <maskray@google.com>
| -rw-r--r-- | misc/sys/cdefs.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h index 1c2b044..f525f67 100644 --- a/misc/sys/cdefs.h +++ b/misc/sys/cdefs.h @@ -27,8 +27,8 @@ /* The GNU libc does not support any K&R compilers or the traditional mode of ISO C compilers anymore. Check for some of the combinations not supported anymore. */ -#if defined __GNUC__ && !defined __STDC__ -# error "You need a ISO C conforming compiler to use the glibc headers" +#if defined __GNUC__ && !defined __STDC__ && !defined __cplusplus +# error "You need a ISO C or C++ conforming compiler to use the glibc headers" #endif /* Some user header file might have defined this before. */ |