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C-SKY: Use an autoconf template to produce `preconfigure'

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Avoid fiddling with autoconf internals and use AC_DEFINE_UNQUOTED to
define macros in the configuration headers rather than handcoding an
equivalent shell sequence with the use of the `as_echo' undocumented
variable.

Switch to using AC_MSG_ERROR rather than `echo' and `exit' directly for
error handling.  Owing to the lack of any kind of error annotation it
makes it difficult to spot the message in the flood in a parallel build
and neither it is logged in `config.log'.
This commit is contained in:
Maciej W. Rozycki 2022-05-13 17:07:23 +01:00
parent f39ff483f3
commit 7c20479d08
2 changed files with 72 additions and 10 deletions
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27
sysdeps/csky/preconfigure
View File

@ -1,3 +1,6 @@
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
# Local preconfigure fragment for sysdeps/csky
case "$machine" in
csky*)
abi=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
@ -11,16 +14,14 @@ csky*)
case "$abi" in
1)
echo "glibc does not support abiv1 yet" >&2
exit 1
;;
as_fn_error 1 "glibc does not support abiv1 yet" "$LINENO" 5
;;
2)
machine=abiv2
;;
machine=abiv2
;;
*)
echo "Unknown abi" >&2
exit 1
;;
as_fn_error 1 "Unknown abi" "$LINENO" 5
;;
esac
# __CSKY_HARD_FLOAT_ABI__ was added on gcc 11 to specify whether
@ -48,7 +49,13 @@ csky*)
base_machine=csky
machine=csky/$machine
$as_echo "#define CSKYABI $abi" >>confdefs.h
$as_echo "#define CSKY_HARD_FLOAT $with_fp_cond" >>confdefs.h
cat >>confdefs.h <<_ACEOF
#define CSKYABI $abi
_ACEOF
cat >>confdefs.h <<_ACEOF
#define CSKY_HARD_FLOAT $with_fp_cond
_ACEOF
;;
esac

55
sysdeps/csky/preconfigure.ac Normal file
View File

@ -0,0 +1,55 @@
GLIBC_PROVIDES[]dnl See aclocal.m4 in the top level source directory.
# Local preconfigure fragment for sysdeps/csky
case "$machine" in
csky*)
abi=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
sed -n 's/^#define __CSKYABI__ \(.*\)/\1/p'`
hard_float=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
sed -n 's/^#define __CSKY_HARD_FLOAT__ \(.*\)/\1/p'`
hard_float_sf=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
sed -n 's/^#define __CSKY_HARD_FLOAT_FPU_SF__ \(.*\)/\1/p'`
hard_float_abi=`$CC $CFLAGS $CPPFLAGS -E -dM -xc /dev/null |
sed -n 's/^#define __CSKY_HARD_FLOAT_ABI__ \(.*\)/\1/p'`
case "$abi" in
1)
AC_MSG_ERROR([glibc does not support abiv1 yet], [1])
;;
2)
machine=abiv2
;;
*)
AC_MSG_ERROR([Unknown abi], [1])
;;
esac
# __CSKY_HARD_FLOAT_ABI__ was added on gcc 11 to specify whether
# -mfloat-abi=hard is set. On older gcc, the float ABI is defined solely
# with __CSKY_HARD_FLOAT__. If __CSKY_HARD_FLOAT__ is set, it can be
# either a hard-float ABI (gcc older than 11, or gcc11 -mfloat-abi=hard
# (__CSKY_HARD_FLOAT_ABI__ is set) or -mfloat-abi=softfp
# (__CSKY_HARD_FLOAT_ABI__ is not set). To be compatible with older gcc,
# use __CSKY_HARD_FLOAT_FPU_SF__ identify if -mfloat-abi is supported,
# because it is added to gcc at the same time as -mfloat-abi.
if test -n "$hard_float"; then
if test -z "$hard_float_sf"; then
with_fp_cond=1
else
if test -n "$hard_float_abi"; then
with_fp_cond=1
else
with_fp_cond=0
fi
fi
else
with_fp_cond=0
fi
base_machine=csky
machine=csky/$machine
AC_DEFINE_UNQUOTED([CSKYABI], [$abi])
AC_DEFINE_UNQUOTED([CSKY_HARD_FLOAT], [$with_fp_cond])
;;
esac