diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index b875145f564..f630d568db6 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -492,7 +492,9 @@ in the following sections. -msingle-float -mdouble-float -mint64 -mlong64 -mlong32 @gol -G@var{num} -membedded-data -mno-embedded-data @gol -muninit-const-in-rodata -mno-uninit-const-in-rodata @gol --msplit-addresses -mno-split-addresses -mrnames -mno-rnames @gol +-msplit-addresses -mno-split-addresses @gol +-mexplicit-relocs -mno-explicit-relocs @gol +-mrnames -mno-rnames @gol -mcheck-zero-division -mno-check-zero-division @gol -mmemcpy -mno-memcpy -mlong-calls -mno-long-calls @gol -mmad -mno-mad -mfused-madd -mno-fused-madd -nocpp @gol @@ -8275,7 +8277,35 @@ This option is only meaningful in conjunction with @option{-membedded-data}. @opindex msplit-addresses @opindex mno-split-addresses Enable (disable) use of the @code{%hi()} and @code{%lo()} assembler -relocation operators. +relocation operators. This option has been superceded by +@option{-mexplicit-relocs} but is retained for backwards compatibility. + +@item -mexplicit-relocs +@itemx -mno-explicit-relocs +@opindex mexplicit-relocs +@opindex mno-explicit-relocs +Use (do not use) assembler relocation operators when dealing with symbolic +addresses. The alternative, selected by @option{-mno-explicit-relocs}, +is to use assembler macros instead. + +@option{-mexplicit-relocs} is usually the default if GCC was +configured to use an assembler that supports relocation operators. +However, there are two exceptions: + +@itemize @bullet +@item +GCC is not yet able to generate explicit relocations for the combination +of @option{-mabi=64} and @option{-mno-abicalls}. This will be addressed +in a future release. + +@item +The combination of @option{-mabicalls} and @option{-fno-unit-at-a-time} +implies @option{-mno-explicit-relocs} unless explicitly overridden. +This is because, when generating abicalls, the choice of relocation +depends on whether a symbol is local or global. In some rare cases, +GCC will not be able to decide this until the whole compilation unit +has been read. +@end itemize @item -mrnames @itemx -mno-rnames |
