We have recently updated the default for the `-misa-spec=' option, yet we still have not documented it nor its `--with-isa-spec=' counterpart in the GCC manuals. Fix that.
gcc/ * doc/install.texi (Configuration): Document `--with-isa-spec=' RISC-V option. * doc/invoke.texi (Option Summary): List `-misa-spec' RISC-V option. (RISC-V Options): Document it. --- Hi, Verified with `make info' and `make pdf'. OK to apply? Maciej --- gcc/doc/install.texi | 14 ++++++++++++++ gcc/doc/invoke.texi | 16 ++++++++++++++++ 2 files changed, 30 insertions(+) gcc-riscv-misa-doc.diff Index: gcc/gcc/doc/install.texi =================================================================== --- gcc.orig/gcc/doc/install.texi +++ gcc/gcc/doc/install.texi @@ -1599,6 +1599,20 @@ On certain targets this option sets the size as a power of two in bytes. On AArch64 @var{size} is required to be either 12 (4KB) or 16 (64KB). +@item --with-isa-spec=@var{ISA-spec-string} +On RISC-V targets specify the default version of the RISC-V ISA specification +to produce code conforming to. The possibilities for @var{ISA-spec-string} +are: +@table @code +@item 2.2 +Produce code conforming to version 2.2. +@item 20190608 +Produce code conforming to version 20190608. +@item 20191213 +Produce code conforming to version 20191213. +@end table +In the absence of this configuration option the default version is 20191213. + @item --enable-__cxa_atexit Define if you want to use __cxa_atexit, rather than atexit, to register C++ destructors for local statics and global objects. Index: gcc/gcc/doc/invoke.texi =================================================================== --- gcc.orig/gcc/doc/invoke.texi +++ gcc/gcc/doc/invoke.texi @@ -1184,6 +1184,7 @@ See RS/6000 and PowerPC Options. -mabi=@var{ABI-string} @gol -mfdiv -mno-fdiv @gol -mdiv -mno-div @gol +-misa-spec=@var{ISA-spec-string} @gol -march=@var{ISA-string} @gol -mtune=@var{processor-string} @gol -mpreferred-stack-boundary=@var{num} @gol @@ -27632,6 +27633,21 @@ Do or don't use hardware instructions fo M extension. The default is to use them if the specified architecture has these instructions. +@item -misa-spec=@var{ISA-spec-string} +@opindex misa-spec +Specify the version of the RISC-V ISA specification to produce code conforming +to. The possibilities for @var{ISA-spec-string} are: +@table @code +@item 2.2 +Produce code conforming to version 2.2. +@item 20190608 +Produce code conforming to version 20190608. +@item 20191213 +Produce code conforming to version 20191213. +@end table +The default is @option{-misa-spec=20191213} unless GCC has been configured +with @option{--with-isa-spec=} specifying a different default version. + @item -march=@var{ISA-string} @opindex march Generate code for given RISC-V ISA (e.g.@: @samp{rv64im}). ISA strings must be