https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107543
Bug ID: 107543
Summary: c-family/c-cppbuiltin.cc: Undefine
__GNUC_STDC_INLINE__ in C++ mode?
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: i at maskray dot me
Target Milestone: ---
-fgnu89-inline / C99 / C++ inline modes are all different. For C++, perhaps
neither
__GNUC_STDC_INLINE__ nor __GNUC_GNUC_INLINE__ should be defined.
% g++ -dM -E -xc++ /dev/null | grep __GNUC_STDC_INLINE__
#define __GNUC_STDC_INLINE__ 1
gcc/doc/cpp.texi does not talk about C++
@item __GNUC_STDC_INLINE__
GCC defines this macro if functions declared @code{inline} will be
handled according to the ISO C99 or later standards. Object files will contain
externally visible definitions of all functions declared @code{extern
inline}. They will not contain definitions of any functions declared
@code{inline} without @code{extern}.
If this macro is defined, GCC supports the @code{gnu_inline} function
attribute as a way to always get the gnu90 behavior.
Side note: there is "warning: command-line option ‘-fgnu89-inline’ is valid for
C/ObjC but not for C++" but __attribute__((gnu_inline)) is usable in C++ mode
and has strange codegen behaviors.
