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GLIBC_PROVIDES[]dnl See aclocal.m4 in the top level source directory.
# Local preconfigure fragment for sysdeps/riscv
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
64 | 32)
;;
*)
AC_MSG_ERROR([Unable to determine XLEN], [1])
;;
esac
case "$flen" in
64)
float_machine=rvd
with_fp_cond=1
;;
32)
AC_MSG_ERROR([glibc does not yet support systems with the F but not D extensions], 1)
;;
"")
with_fp_cond=0
;;
*)
AC_MSG_ERROR([Unable to determine FLEN], [1])
;;
esac
case "$float_abi" in
soft)
abi_flen=0
;;
single)
AC_MSG_ERROR([glibc does not yet support the single floating-point ABI], [1])
;;
double)
abi_flen=64
;;
*)
AC_MSG_ERROR([Unable to determine floating-point ABI], [1])
;;
esac
case "$atomic" in
__riscv_atomic)
;;
*)
AC_MSG_ERROR([glibc requires the A extension], [1])
;;
esac
base_machine=riscv
machine=riscv/rv$xlen/$float_machine
AC_DEFINE_UNQUOTED([RISCV_ABI_XLEN], [$xlen])
AC_DEFINE_UNQUOTED([RISCV_ABI_FLEN], [$abi_flen])
;;
esac
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