| case "$machine" in |
| riscv*) |
| xlen=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null | sed -n 's/^#define __riscv_xlen \(.*\)/\1/p'` |
| flen=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null | sed -n 's/^#define __riscv_flen \(.*\)/\1/p'` |
| float_abi=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null | sed -n 's/^#define __riscv_float_abi_\([^ ]*\) .*/\1/p'` |
| atomic=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null | grep '#define __riscv_atomic' | cut -d' ' -f2` |
| |
| case "$xlen" in |
| 32) |
| echo "glibc does not yet support 32-bit systems" >&2 |
| exit 1 |
| ;; |
| 64) |
| ;; |
| *) |
| echo "Unable to determine XLEN" >&2 |
| exit 1 |
| ;; |
| esac |
| |
| case "$flen" in |
| 64) |
| float_machine=rvd |
| with_fp_cond=1 |
| ;; |
| 32) |
| echo "glibc does not yet support systems with the F but not D extensions" >&2 |
| exit 1 |
| ;; |
| "") |
| with_fp_cond=0 |
| ;; |
| *) |
| echo "Unable to determine FLEN" >&2 |
| exit 1 |
| ;; |
| esac |
| |
| case "$float_abi" in |
| soft) |
| abi_flen=0 |
| ;; |
| single) |
| echo "glibc does not yet support the single floating-point ABI" >&2 |
| exit 1 |
| ;; |
| double) |
| abi_flen=64 |
| ;; |
| *) |
| echo "Unable to determine floating-point ABI" >&2 |
| exit 1 |
| ;; |
| esac |
| |
| case "$atomic" in |
| __riscv_atomic) |
| ;; |
| *) |
| echo "glibc requires the A extension" >&2 |
| exit 1 |
| ;; |
| esac |
| |
| base_machine=riscv |
| machine=riscv/rv$xlen/$float_machine |
| |
| $as_echo "#define RISCV_ABI_XLEN $xlen" >>confdefs.h |
| $as_echo "#define RISCV_ABI_FLEN $abi_flen" >>confdefs.h |
| ;; |
| esac |