nrpe编译出错: nrpe.c:244: undefined reference to `get_dh512′

今天在合作方的服务器上编译nrpe时，报如下错误

cd ./src/; make ; cd ..
make[1]: Entering directory `/usr/local/src/nrpe-2.12/src'
gcc -g -O2 -I/usr/local/ssl/include/openssl -I/usr/local/ssl/include -DHAVE_CONFIG_H -o nrpe nrpe.c utils.c -L/usr/lib64 -lssl -lcrypto -lnsl -lwrap
nrpe.c: In function ‘main’:
nrpe.c:244: warning: assignment makes pointer from integer without a cast
/tmp/cccgDIQ0.o: In function `main':
/usr/local/src/nrpe-2.12/src/nrpe.c:244: undefined reference to `get_dh512'
collect2: ld returned 1 exit status
make[1]: *** [nrpe] Error 1
make[1]: Leaving directory `/usr/local/src/nrpe-2.12/src'

*** Compile finished ***

If the NRPE daemon and client compiled without any errors, you
can continue with the installation or upgrade process.

Read the PDF documentation (NRPE.pdf) for information on the next
steps you should take to complete the installation or upgrade.

其中的错误为

/usr/local/src/nrpe-2.12/src/nrpe.c:244: undefined reference to `get_dh512'

这个错误是由openssl引起的，我发现系统上除了默认的openssl外在/usr/local/ssl目录下有个编译的openssl，这个也可以从以上错误输出看出来：gcc -g -O2 -I/usr/local/ssl/include/openssl -I/usr/local/ssl/include -DHAVE_CONFIG_H -o nrpe nrpe.c utils.c -L/usr/lib64 -lssl -lcrypto -lnsl -lwrap

-I/usr/local/ssl

看来是没有去找系统默认的openssl和openssl-devel解决方法：

我是直接去configure文件里把/usr/local/ssl这个路径给删了

vi /usr/local/src/nrpe-2.12/configure
for dir in $ssl_inc_dir $ssl_dir /usr/local/openssl /usr/local/ssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr /usr/freeware/lib/openssl
# 把这行中的/usr/local/ssl去掉
for dir in $ssl_inc_dir $ssl_dir /usr/local/openssl /usr/lib/ssl /usr/ssl /usr/pkg /usr/local /usr /usr/freeware/lib/openssl

生成makefile

./configure
make all

通过，OK。