今天换了一台装的红旗dc5.0sp2的机器，想编译nagios的rpm包，但是怎么编译都报错
[root@http2 nagios-2.10]# !rpmb
rpmbuild -bb nagios.spec
(%prep): /bin/sh -e /var/tmp/rpm-tmp.79882
umask 022
cd /usr/src/asianux/build
lang=c
export lang
unset display
cd /usr/src/asianux/build
rm -rf nagios-2.10
/bin/gzip -dc /usr/src/asianux/sources/nagios-2.10.tar.gz
tar -xf -
status=0
'[' 0 -ne 0 ']'
cd nagios-2.10
/usr/bin/id -u
'[' 0 = 0 ']'
/bin/chown -rhf root .
/usr/bin/id -u
'[' 0 = 0 ']'
/bin/chgrp -rhf root .
/bin/chmod -rf a rx,u w,g-w,o-w .
exit 0
(%build): /bin/sh -e /var/tmp/rpm-tmp.79882
umask 022
cd /usr/src/asianux/build
cd nagios-2.10
lang=c
export lang
unset display
export path=/usr/lib/jdk/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:
path=/usr/lib/jdk/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:
cflags='-o2 -g -pipe -m32 -march=i386 -mtune=pentium4'
cxxflags='-o2 -g -pipe -m32 -march=i386 -mtune=pentium4'
./configure --with-init-dir=/etc/init.d --sysconfdir=/etc/nagios
checking for a bsd-compatible install... /usr/bin/install -c
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking for gcc... gcc
checking for c compiler default output file name... configure: error: c compiler cannot create executables
see `config.log' for more details.
/var/tmp/rpm-tmp.79882 (%build)״
rpm /var/tmp/rpm-tmp.79882 (%build)
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查看config.log文件，发现是有一个参数不识别
gcc version 3.2.3 20030502 (asianux 1.0 3.2.3-47.3)
configure:1807: $? = 0
configure:1809: gcc -v &5
gcc32: argument to `-v' is missing
configure:1812: $? = 1
configure:1835: checking for c compiler default output file name
configure:1838: gcc -o2 -g -pipe -m32 -march=i386 -mtune=pentium4 conftest.c >&5
cc1: invalid option `tune=pentium4'
configure:1841: $? = 1
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昨天我另一台红旗dc5.0sp2上面编译是没有问题的啊，查看昨天机器上的config.log文件中内容，发现有一些区别
gcc version 3.4.6 20060404 (asianux 2.0 3.4.6-3.1)
configure:1807: $? = 0
configure:1809: gcc -v </dev/null >&5
gcc: `-v' option must have argument
configure:1812: $? = 1
configure:1835: checking for c compiler default output file name
configure:1838: gcc -o2 -g -pipe -m32 -march=i386 -mtune=pentium4 conftest.c >&5
configure:1841: $? = 0
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看来原因就是我现在用的系统的gcc不接受tune参数，而两个系统的gcc版本不同。我立马想到，gcc版本不同可能是因为使用oracle安装领航员安装过oracle9i，安装之前做过chgcc，安装之后没有将gcc版本改回来。
原因找到了，改回gcc版本即可：
[root@http2 nagios-2.10]# chgcc.sh -v 346
the current gcc version is 2.96.
the current g version is 2.96.
the gcc and g were changed to each 3.4.6(original version).
when you want to change 2.96, run "/usr/sbin/chgcc.sh -v 296" command.
rm /usr/bin/gcc
rm /usr/bin/g
mv /usr/bin/gcc346 /usr/bin/gcc
mv /usr/bin/g346 /usr/bin/g
[root@http2 nagios-2.10]#
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这个问题只会出现在红旗的系统上面，因为只有红旗linux，为oracle的安装，特意开发了oracle安装领航员，另oracle在红旗linux上的安装变得异常简单。
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