rlwrap安装Invalid configuration `x86_64-unknown-linux-':问题解决
rlwrap安装Invalid configuration `x86_64-unknown-linux-':问题解决
今天在安装rlwrap的过程中出现如下报错，具体信息如下：
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checking build system
type
... Invalid configuration `x86_64-unknown-linux-
': machine `x86_64-unknown-linux'
not recognized
configure: error:
/bin/sh
tools
/config
.sub x86_64-unknown-linux- failed
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先交代下系统环境，系统为RedHat 5.3 64bit：
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[root@vm-1 rlwrap-0.37]
# uname -a
Linux vm-1 2.6.18-128.el5xen
#1 SMP Wed Dec 17 12:01:40 EST 2008 x86_64 x86_64 x86_64 GNU/Linux
[root@vm-1 rlwrap-0.37]
# getconf LONG_BIT
64
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首先查看configure命令运行过程中是那条命令引起错误:
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[root@szmlvm29-54 ~]
# nohup sh -x ./configure && vim nohup
......
+
printf
%s
'checking build system type... '
checking build system
type
... +
test
''
=
set
+ ac_build_alias=
+
test
x = x
++
/bin/sh
tools
/config
.guess
+ ac_build_alias=x86_64-unknown-linux-
+
test
xx86_64-unknown-linux- = x
++
/bin/sh
tools
/config
.sub x86_64-unknown-linux-
Invalid configuration `x86_64-unknown-linux-
': machine `x86_64-unknown-linux'
not recognized
......
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可以看到引起condifure出现错误的原因是由于变量ac_build_alias值引起的，再查看configure脚本的内容发现ac_build_alias=`$SHELL "$ac_aux_dir/config.guess"
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2205 { $as_echo
"$as_me:${as_lineno-$LINENO}: checking build system type"
>&5
[root@vm-1 rlwrap-0.37]
# vim configure
......
2206 $as_echo_n
"checking build system type... "
>&6; }
2207
if
test
"${ac_cv_build+set}"
=
set
;
then
:
2208 $as_echo_n
"(cached) "
>&6
2209
else
2210 ac_build_alias=$build_alias
2211
test
"x$ac_build_alias"
= x &&
2212 ac_build_alias=`$SHELL
"$ac_aux_dir/config.guess"
`
2213
test
"x$ac_build_alias"
= x &&
2214 as_fn_error
"cannot guess build type; you must specify one"
"$LINENO"
5
2215 ac_cv_build=`$SHELL
"$ac_aux_dir/config.sub"
$ac_build_alias` ||
2216 as_fn_error
"$SHELL $ac_aux_dir/config.sub $ac_build_alias failed"
"$LINENO"
5
2217
2218
fi
......
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再综合两者得知，实际就是/bin/sh tools/config.guess这个脚本执行出现问题，通过脚本sh -xtools/config.guess来查看脚本执行情况,然后比对正常运行和出现错误脚本的情况：
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[root@vm-1 tools]
# sh -x ./config.guess
......出现错误
++
test
x = x
++ CC_FOR_BUILD=no_compiler_found
++ set_cc_for_build=
+
cat
++ no_compiler_found -E
/tmp/cgb13341/dummy
.c
++
grep
LIBC=
++
sed
-e
's: ::g'
+
eval
+
case
"${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}"
in
+
echo
x86_64-unknown-linux-
x86_64-unknown-linux-
+
exit
......
正常情况
......
++
test
xcc = x
++ set_cc_for_build=
+
cat
++ cc -E
/tmp/cgm24262/dummy
.c
++
grep
LIBC=
++
sed
-e
's: ::g'
+
eval
LIBC=gnu
++ LIBC=gnu
+
case
"${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}"
in
+
echo
x86_64-unknown-linux-gnu
x86_64-unknown-linux-gnu
+
exit
......
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如上通过以上分析可以发现，出现这个故障其实就是因为系统命令cc不存在引起的，解决方法就是安装gcc就行。
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[root@vm-1 ~]
# yum install -y gcc
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