diff options
Diffstat (limited to 'lib/xref.h')
| -rw-r--r-- | lib/xref.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/xref.h b/lib/xref.h index e464da4131..426ffad705 100644 --- a/lib/xref.h +++ b/lib/xref.h @@ -119,6 +119,7 @@ struct xref_block { extern struct xref_block *xref_blocks; extern void xref_block_add(struct xref_block *block); +extern void xref_gcc_workaround(const struct xref *xref); #ifndef HAVE_SECTION_SYMS /* we have a build system patch to use GNU ld on Solaris; if that doesn't @@ -218,12 +219,35 @@ extern const struct xref * const __stop_xref_array[1] DSO_LOCAL; #endif /* HAVE_SECTION_SYMS */ /* emit the array entry / pointer to xref */ +#if defined(__clang__) || !defined(__cplusplus) #define XREF_LINK(dst) \ static const struct xref * const NAMECTR(xref_p_) \ __attribute__((used, section("xref_array"))) \ = &(dst) \ /* end */ +#else /* GCC && C++ */ +/* workaround for GCC bug 41091 (dated 2009), added in 2021... + * + * this breaks extraction of xrefs with xrelfo.py (because the xref_array + * entry will be missing), but provides full runtime functionality. To get + * the proper list of xrefs from C++ code, build with clang... + */ +struct _xref_p { + const struct xref * const ptr; + + _xref_p(const struct xref *_ptr) : ptr(_ptr) + { + xref_gcc_workaround(_ptr); + } +}; + +#define XREF_LINK(dst) \ + static const struct _xref_p __attribute__((used)) \ + NAMECTR(xref_p_)(&(dst)) \ + /* end */ +#endif + /* initializer for a "struct xref" */ #define XREF_INIT(type_, xrefdata_, func_) \ { \ |