diff options
Diffstat (limited to 'sysdeps/riscv/preconfigure.ac')
| -rw-r--r-- | sysdeps/riscv/preconfigure.ac | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/sysdeps/riscv/preconfigure.ac b/sysdeps/riscv/preconfigure.ac new file mode 100644 index 0000000..a5c30e0 --- /dev/null +++ b/sysdeps/riscv/preconfigure.ac @@ -0,0 +1,64 @@ +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 |