glibc/sysdeps/riscv/Makefile

ifeq ($(subdir),misc)
sysdep_headers += sys/asm.h
endif

# RISC-V's assembler also needs to know about PIC as it changes the definition
# of some assembler macros.
ASFLAGS-.os += $(pic-ccflag)

ifeq (no,$(riscv-r-align))
ASFLAGS-.os += -Wa,-mno-relax
ASFLAGS-.o += -Wa,-mno-relax
sysdep-CFLAGS += -mno-relax
endif
RISC-V: Build Infastructure This patch lays out the top-level orginazition of the RISC-V port. It contains all the Implies files as well as various other fragments of build infastructure for the RISC-V port. This contains the only change to a shared file: config.h.in. RISC-V is a family of base ISAs with optional extensions. The base ISAs are RV32I and RV64I, which are 32-bit and 64-bit integer-only ISAs, but this port currently only supports RV64I based systems. Support for RISC-V lives in in sysdeps/riscv. In addition to these ISAs, our glibc port supports most of the currently-defined extensions: the A extension for atomics, the M extension for multiplication, the C extension for compressed instructions, and the F/D extensions for single/double precision IEEE floating-point. Most of these extensions are handled by GCC, but glibc defines various floating-point wrappers and emulation routines as well as some atomic wrappers. We support running glibc-based programs on Linux, the support for which lives in sysdeps/unix/sysv/linux/riscv. 2018-01-29 Palmer Dabbelt <palmer@sifive.com> * sysdeps/riscv/Implies: New file. * sysdeps/riscv/Makefile: Likewise. * sysdeps/riscv/configure: Likewise. * sysdeps/riscv/configure.ac: Likewise. * sysdeps/riscv/nptl/Makefile: Likewise. * sysdeps/riscv/preconfigure: Likewise. * sysdeps/riscv/rv64/Implies-after: Likewise. * sysdeps/riscv/rv64/rvd/Implies: Likewise. * sysdeps/riscv/rv64/rvf/Implies: Likewise. * sysdeps/unix/sysv/linux/riscv/Implies: Likewise. * sysdeps/unix/sysv/linux/riscv/Makefile: Likewise. * sysdeps/unix/sysv/linux/riscv/Versions: Likewise. * sysdeps/unix/sysv/linux/riscv/configure: Likewise. * sysdeps/unix/sysv/linux/riscv/configure.ac: Likewise. * sysdeps/unix/sysv/linux/riscv/ldd-rewrite.sed: Likewise. * sysdeps/unix/sysv/linux/riscv/rv64/Implies: Likewise. * sysdeps/unix/sysv/linux/riscv/rv64/Makefile: Likewise. * sysdeps/unix/sysv/linux/riscv/shlib-versions: Likewise. 2018-01-29 18:30:24 +00:00			`ifeq ($(subdir),misc)`
			`sysdep_headers += sys/asm.h`
			`endif`

			`# RISC-V's assembler also needs to know about PIC as it changes the definition`
			`# of some assembler macros.`
			`ASFLAGS-.os += $(pic-ccflag)`
riscv: Build with -mno-relax if linker does not support R_RISCV_ALIGN It allows build both glibc and tests with lld (Since lld does not support R_RISCV_ALIGN linker relaxation). Checked with a build for riscv32-linux-gnu-rv32imafdc-ilp32d and riscv64-linux-gnu-rv64imafdc-lp64d. Reviewed-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Fangrui Song <maskray@google.com> 2021-11-02 19:51:39 +00:00
			`ifeq (no,$(riscv-r-align))`
			`ASFLAGS-.os += -Wa,-mno-relax`
			`ASFLAGS-.o += -Wa,-mno-relax`
			`sysdep-CFLAGS += -mno-relax`
			`endif`