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Diffstat (limited to 'src/arch/i386/include/bits/compiler.h')
| -rw-r--r-- | src/arch/i386/include/bits/compiler.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/arch/i386/include/bits/compiler.h b/src/arch/i386/include/bits/compiler.h index 000db0c14..d48b4b385 100644 --- a/src/arch/i386/include/bits/compiler.h +++ b/src/arch/i386/include/bits/compiler.h @@ -19,8 +19,19 @@ FILE_LICENCE ( GPL2_OR_LATER ); * The implicit calls to memcpy() and memset() which gcc can generate * do not seem to have this inconsistency; -mregparm and -mrtd affect * them in the same way as any other function. + * + * Update (25/4/14): it appears that more recent gcc versions do allow + * -mrtd to affect calls to the implicit arithmetic functions. There + * is nothing obvious in the gcc changelogs to indicate precisely when + * this happened. From experimentation with available gcc versions, + * the change occurred sometime between v4.6.3 and v4.7.2. We assume + * that only versions up to v4.6.x require the special treatment. */ +#if ( __GNUC__ < 4 ) || ( ( __GNUC__ == 4 ) && ( __GNUC_MINOR__ <= 6 ) ) #define __libgcc __attribute__ (( cdecl )) +#else +#define __libgcc +#endif #endif /* ASSEMBLY */ |