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Diffstat (limited to 'gcc/doc/install.texi')
| -rw-r--r-- | gcc/doc/install.texi | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi index 80ee2cd..09ea87a 100644 --- a/gcc/doc/install.texi +++ b/gcc/doc/install.texi @@ -2667,6 +2667,17 @@ target binutils supports @code{Intel CET} instructions and disabled otherwise. In this case, the target libraries are configured to get additional @option{-fcf-protection} option. +@item --enable-x86-64-mfentry +@itemx --disable-x86-64-mfentry +Enable @option {-mfentry} by default on x86-64 to put the profiling +counter call, @code{__fentry__}, before the prologue so that @option{-pg} +can be used with @option{-fshrink-wrap} which is enabled at @option{-O1}. +This configure option is 64-bit only because @code{__fentry__} doesn't +support PIC in 32-bit mode. + +@option{--enable-x86-64-mfentry=auto} is default. @option{-mfentry} is +enabled on Linux/x86-64 by default. + @item --with-riscv-attribute=@samp{yes}, @samp{no} or @samp{default} Generate RISC-V attribute by default, in order to record extra build information in object. |