freebsd-nq/share/mk/bsd.stand.mk

# $FreeBSD$
#
# Common definitons for programs building in the stand-alone environment
# and/or using libstand.
#

CFLAGS+= -ffreestanding -Wformat
CFLAGS+= ${CFLAGS_NO_SIMD} -D_STANDALONE
.if ${MACHINE_CPUARCH} == "riscv"
CFLAGS+=	-march=rv64imac -mabi=lp64
.elif ${MACHINE_CPUARCH} != "aarch64"
CFLAGS+=	-msoft-float
.endif

.if ${MACHINE_CPUARCH} == "i386"
CFLAGS.gcc+=	-mpreferred-stack-boundary=2
.endif
.if ${MACHINE_CPUARCH} == "amd64"
CFLAGS+=	-fPIC -mno-red-zone
.endif
.if ${MACHINE_CPUARCH} == "aarch64"
CFLAGS+=	-fPIC -mgeneral-regs-only
.endif
.if ${MACHINE_CPUARCH} == "arm"
CFLAGS+=	-fPIC
.endif
.if ${MACHINE_CPUARCH} == "mips"
CFLAGS+=	-G0 -fno-pic -mno-abicalls
.endif
Use CFLAGS_NO_SIMD in preference to varying lists of -mno-xxxx flags. Go ahead and defined -D_STANDALONE for all targets (only strictly needed for some architecture, but harmless on those it isn't required for). Also add -msoft-float to all architectures uniformly rather that higgley piggley like it is today. Differential Revision: https://reviews.freebsd.org/D3496 2015-08-27 23:46:42 +00:00			`# $FreeBSD$`
			`#`
			`# Common definitons for programs building in the stand-alone environment`
			`# and/or using libstand.`
			`#`

			`CFLAGS+= -ffreestanding -Wformat`
o Add support for long double. o Add support for latest RISC-V GNU toolchain. Sponsored by: DARPA, AFRL Sponsored by: HEIF5 2016-11-03 13:06:17 +00:00			`CFLAGS+= ${CFLAGS_NO_SIMD} -D_STANDALONE`
			`.if ${MACHINE_CPUARCH} == "riscv"`
Support for v1.10 (latest) of RISC-V privilege specification. New version is not compatible on supervisor mode with v1.9.1 (previous version). Highlights: o BBL (Berkeley Boot Loader) provides no initial page tables anymore allowing us to choose VM, to build page tables manually and enable MMU in S-mode. o SBI interface changed. o GENERIC kernel. FDT is now chosen standard for RISC-V hardware description. DTB is now provided by Spike (golden model simulator). This allows us to introduce GENERIC kernel. However, description for console and timer devices is not provided in DTB, so move these devices temporary to nexus bus. o Supervisor can't access userspace by default. Solution is to set SUM (permit Supervisor User Memory access) bit in sstatus register. o Compressed extension is now turned on by default. o External GCC 7.1 compiler used. o _gp renamed to __global_pointer$ o Compiler -march= string is now in use allowing us to choose required extensions (compressed, FPU, atomic, etc). Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D11800 2017-08-10 14:18:09 +00:00			`CFLAGS+= -march=rv64imac -mabi=lp64`
Do not use -msoft-float with intention of disabling FP on aarch64 GNU GCC does does recognise it as a valid option and we already use -mgeneral-regs-only that has the desired effect. Reviewed by: emaste Differential Revision: https://reviews.freebsd.org/D10306 2017-04-07 22:58:25 +00:00			`.elif ${MACHINE_CPUARCH} != "aarch64"`
o Add support for long double. o Add support for latest RISC-V GNU toolchain. Sponsored by: DARPA, AFRL Sponsored by: HEIF5 2016-11-03 13:06:17 +00:00			`CFLAGS+= -msoft-float`
			`.endif`
Use CFLAGS_NO_SIMD in preference to varying lists of -mno-xxxx flags. Go ahead and defined -D_STANDALONE for all targets (only strictly needed for some architecture, but harmless on those it isn't required for). Also add -msoft-float to all architectures uniformly rather that higgley piggley like it is today. Differential Revision: https://reviews.freebsd.org/D3496 2015-08-27 23:46:42 +00:00
			`.if ${MACHINE_CPUARCH} == "i386"`
			`CFLAGS.gcc+= -mpreferred-stack-boundary=2`
			`.endif`
			`.if ${MACHINE_CPUARCH} == "amd64"`
			`CFLAGS+= -fPIC -mno-red-zone`
			`.endif`
			`.if ${MACHINE_CPUARCH} == "aarch64"`
Add -fPIC to the standalone build flags on arm64. This is needed as loader.efi is position independend, however we were not building it as such causing a build failure when building with lld. Sponsored by: DARPA, AFRL 2017-04-07 14:30:51 +00:00			`CFLAGS+= -fPIC -mgeneral-regs-only`
Use CFLAGS_NO_SIMD in preference to varying lists of -mno-xxxx flags. Go ahead and defined -D_STANDALONE for all targets (only strictly needed for some architecture, but harmless on those it isn't required for). Also add -msoft-float to all architectures uniformly rather that higgley piggley like it is today. Differential Revision: https://reviews.freebsd.org/D3496 2015-08-27 23:46:42 +00:00			`.endif`
Build the 32-bit ARM libstand and loader parts with -fPIC. Many of them are already built with this flag so libstand should also be build as such. This will be needed when moving to lld as it refuses to link due to incompatible relocations. Sponsored by: DARPA, AFRL 2017-07-25 10:41:34 +00:00			`.if ${MACHINE_CPUARCH} == "arm"`
			`CFLAGS+= -fPIC`
			`.endif`
Use CFLAGS_NO_SIMD in preference to varying lists of -mno-xxxx flags. Go ahead and defined -D_STANDALONE for all targets (only strictly needed for some architecture, but harmless on those it isn't required for). Also add -msoft-float to all architectures uniformly rather that higgley piggley like it is today. Differential Revision: https://reviews.freebsd.org/D3496 2015-08-27 23:46:42 +00:00			`.if ${MACHINE_CPUARCH} == "mips"`
			`CFLAGS+= -G0 -fno-pic -mno-abicalls`
			`.endif`