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c506155709
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.
39 lines
1.1 KiB
Plaintext
39 lines
1.1 KiB
Plaintext
sinclude(./aclocal.m4)dnl Autoconf lossage
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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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# Local configure fragment for sysdeps/unix/sysv/linux/riscv.
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arch_minimum_kernel=4.15.0
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libc_cv_riscv_int_abi=no
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AC_EGREP_CPP(4 8 8, [__SIZEOF_INT__ __SIZEOF_LONG__ __SIZEOF_POINTER__
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], libc_cv_riscv_int_abi=lp64)
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if test $libc_cv_riscv_int_abi = no; then
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AC_MSG_ERROR([Unable to determine integer ABI])
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fi
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libc_cv_riscv_float_abi=no
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AC_EGREP_CPP(yes, [#ifdef __riscv_float_abi_double
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yes
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#endif
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],libc_cv_riscv_float_abi=d)
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AC_EGREP_CPP(yes, [#ifdef __riscv_float_abi_soft
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yes
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#endif
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],libc_cv_riscv_float_abi=)
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if test $libc_cv_riscv_float_abi = no; then
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AC_MSG_ERROR([Unable to determine floating-point ABI])
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fi
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LIBC_CONFIG_VAR([default-abi], [$libc_cv_riscv_int_abi$libc_cv_riscv_float_abi])
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case $libc_cv_riscv_int_abi$libc_cv_riscv_float_abi-$machine in
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lp64-riscv/rv64/*)
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LIBC_SLIBDIR_RTLDDIR([lib64/lp64], [lib])
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;;
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lp64d-riscv/rv64/*)
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LIBC_SLIBDIR_RTLDDIR([lib64/lp64d], [lib])
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;;
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esac
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ldd_rewrite_script=sysdeps/unix/sysv/linux/riscv/ldd-rewrite.sed
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