--- make.conf.example +++ make.conf.example @@ -22,6 +22,13 @@ # Example: #USE="X gtk gnome -alsa" +# Host Setting +# =========== +# +# All LoongArch64 systems built with the LP64D ABI, which is the default, +# should use this host setting: +CHOST="loongarch64-unknown-linux-gnu" + # Host and optimization settings # ============================== # @@ -39,9 +46,29 @@ # -frecord-gcc-switches, since otherwise the check could result in false # positive results. # -# Please refer to the GCC manual for a list of possible values. +# -march= tells the compiler to take full advantage of the ABI and +# instructions available on a certain LoongArch CPU model (none defined at the +# present), micro-architecture (e.g. LA464), or generic ISA level (e.g. +# loongarch64 = as defined in the LoongArch ISA manual v1.00). This will +# produce code which may not run on other LoongArch CPUs supporting different +# ISA levels or modules. +# +# -mtune= results in code optimised for a specific CPU +# model, micro-architecture (e.g. LA464) or generic ISA level, without +# breaking compatibility with other LoongArch CPUs supporting the same ISA. +# +# -mabi= specifies the ABI, i.e. the integer and floating-point +# calling convention to use. Care should be taken while setting both -march +# and -mabi, as some calling conventions are impossible to implement on some +# ISAs. +# +# Please refer to the section "LoongArch Options" of the GCC manual and/or the +# 《龙芯架构工具链约定》/ "LoongArch Toolchain Conventions" document for a +# list of possible values for these options. # +# Decent examples: #CFLAGS="-O2 -pipe" +#CFLAGS="-march=la464 -mtune=la464 -O2 -pipe" # # If you set a CFLAGS above, then this line will set your default C++ flags to # the same settings. @@ -76,7 +103,7 @@ # DO NOT PUT ANYTHING BUT YOUR SPECIFIC ~ARCHITECTURE IN THE LIST. # IF YOU ARE UNSURE OF YOUR ARCH, OR THE IMPLICATIONS, DO NOT MODIFY THIS. # -#ACCEPT_KEYWORDS="~arch" +#ACCEPT_KEYWORDS="~loong" # ACCEPT_LICENSE is used to mask packages based on licensing restrictions. # It may contain both license and group names, where group names are