最近在git上看到一个项目
https://github.com/blechschmidt/massdns
于是下了下来遇到点坑。。。 记下来
clone 之后make的时候
[root@localhost massdns]# make
mkdir -p bin
cc -O3 -std=c11 -DHAVE_EPOLL -DHAVE_SYSINFO -Wall -fstack-protector-strong main.c -o bin/massdns
cc1: error: unrecognized command line option “-std=c11”
cc1: error: unrecognized command line option “-fstack-protector-strong”
make: *** [all] Error 1
报错 查了下是gcc版本低的原因
想yum update下结果yum最高也就到4.4
wget http://people.centos.org/tru/devtools-2/devtools-2.repo
mv devtools-2.repo /etc/yum.repos.d
yum install devtoolset-2-gcc devtoolset-2-binutils devtoolset-2-gcc-c++
三个安装包(gcc/g++/c++)会被安装到，/opt/rh/devtoolset-2/root/目录中。然后我们创建一个软连接就可以使用了。
ln -s /opt/rh/devtoolset-2/root/usr/bin/gcc /usr/bin/gcc
ln -s /opt/rh/devtoolset-2/root/usr/bin/c++ /usr/bin/c++
ln -s /opt/rh/devtoolset-2/root/usr/bin/g++ /usr/bin/g++
gcc –version
之后编译
[root@localhost massdns]# make
mkdir -p bin
cc -O3 -std=c11 -DHAVE_EPOLL -DHAVE_SYSINFO -Wall -fstack-protector-strong main.c -o bin/massdns
/tmp/cc0H3LNe.o: In function `timed_ring_init’:
main.c:(.text+0x4aeb): undefined reference to `clock_gettime’
/tmp/cc0H3LNe.o: In function `timed_ring_add’:
main.c:(.text+0x4d0a): undefined reference to `clock_gettime’
/tmp/cc0H3LNe.o: In function `timed_ring_handle’:
main.c:(.text+0x4e6f): undefined reference to `clock_gettime’
/tmp/cc0H3LNe.o: In function `check_progress’:
main.c:(.text+0x738c): undefined reference to `clock_gettime’
/tmp/cc0H3LNe.o: In function `timed_ring_handle.constprop.22′:
main.c:(.text+0x93c9): undefined reference to `clock_gettime’
/tmp/cc0H3LNe.o:main.c:(.text+0x96a5): more undefined references to `clock_gettime’ follow
collect2: error: ld returned 1 exit status
make: *** [all] Error 1
出现clock_gettime 链接错误的问题
在Makefile -lrt即可
然后make install下成功~~~
