Nagios Support Forum

Trying to compile nrpe-4.0.3 on Amazon Linux 2023.

Looks like there are a number of errors with openssl 3.0 that ships with Amazon Linux 2023.
Am I doing something wrong ?

Thanks,

-- Donnie

[donnie@dev nrpe-4.0.3]# make all
cd ./src/; make
make[1]: Entering directory '/usr/local/src/nrpe-4.0.3/src'
gcc -g -O2 -DHAVE_CONFIG_H -I ../include -I ./../include -o nrpe ./nrpe.c ./uti ls.c ./acl.c -lssl -lcrypto
./nrpe.c: In function ‘init_ssl’:
./nrpe.c:287:9: warning: ‘ENGINE_load_builtin_engines’ is deprecated: Since Open SSL 3.0 [-Wdeprecated-declarations]
287 | ENGINE_load_builtin_engines();
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../include/common.h:36,
from ./nrpe.c:38:
/usr/include/openssl/engine.h:358:28: note: declared here
358 | OSSL_DEPRECATEDIN_3_0 void ENGINE_load_builtin_engines(void);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
./nrpe.c:288:9: warning: ‘RAND_set_rand_engine’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
288 | RAND_set_rand_engine(NULL);
| ^~~~~~~~~~~~~~~~~~~~
In file included from ../include/common.h:35,
from ./nrpe.c:38:
/usr/include/openssl/rand.h:52:27: note: declared here
52 | OSSL_DEPRECATEDIN_3_0 int RAND_set_rand_engine(ENGINE *engine);
| ^~~~~~~~~~~~~~~~~~~~
./nrpe.c:289:9: warning: ‘ENGINE_register_all_complete’ is deprecated: Since Ope nSSL 3.0 [-Wdeprecated-declarations]
289 | ENGINE_register_all_complete();
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from ../include/common.h:36,
from ./nrpe.c:38:
/usr/include/openssl/engine.h:415:27: note: declared here
415 | OSSL_DEPRECATEDIN_3_0 int ENGINE_register_all_complete(void);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
./nrpe.c:450:25: warning: ‘ERR_get_error_line_data’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
450 | while ((x = ERR_get_error_line_data(NULL, NULL, NULL, NULL)) != 0) {
| ^~~~~
In file included from ../include/common.h:34,
from ./nrpe.c:38:
/usr/include/openssl/err.h:425:15: note: declared here
425 | unsigned long ERR_get_error_line_data(const char **file, int *line,
| ^~~~~~~~~~~~~~~~~~~~~~~
./nrpe.c:474:22: warning: implicit declaration of function ‘get_dh2048’ [-Wimpli cit-function-declaration]
474 | dh = get_dh2048();
| ^~~~~~~~~~
./nrpe.c:474:20: warning: assignment to ‘DH *’ {aka ‘struct dh_st *’} from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
474 | dh = get_dh2048();
| ^
./nrpe.c:476:17: warning: ‘DH_free’ is deprecated: Since OpenSSL 3.0 [-Wdeprecat ed-declarations]
476 | DH_free(dh);
| ^~~~~~~
In file included from /usr/include/openssl/dsa.h:31,
from /usr/include/openssl/x509.h:37,
from /usr/include/openssl/ssl.h:32,
from ../include/common.h:32,
from ./nrpe.c:38:
/usr/include/openssl/dh.h:207:28: note: declared here
207 | OSSL_DEPRECATEDIN_3_0 void DH_free(DH *dh);
| ^~~~~~~
./nrpe.c: In function ‘handle_conn_ssl’:
./nrpe.c25: warning: ‘ERR_get_error_line_data’ is deprecated: Since OpenSS L 3.0 [-Wdeprecated-declarations]
2031 | while ((x = ERR_get_error_line_data(NULL, NULL, NULL, NULL)) != 0) {
| ^~~~~
In file included from ../include/common.h:34,
from ./nrpe.c:38:
/usr/include/openssl/err.h:425:15: note: declared here
425 | unsigned long ERR_get_error_line_data(const char **file, int *line,
| ^~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cc61YVa3.o: in function `init_ssl':
/local/src/nrpe-4.0.3/src/./nrpe.c:474:(.text+0x4e1): undefined reference to `ge t_dh2048'
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:48: nrpe] Error 1
make[1]: Leaving directory '/usr/local/src/nrpe-4.0.3/src'
make: *** [Makefile:65: all] Error 2

Hi @dlambert,

Can you double check you have the following dependencies installed?

[root@dev]# dnf install -y gcc glibc glibc-common openssl openssl-devel perl wget
Last metadata expiration check: 0:24:48 ago on Wed Jan 7 17:11:45 2026.
Package gcc-11.5.0-5.amzn2023.0.5.x86_64 is already installed.
Package glibc-2.34-231.amzn2023.0.1.x86_64 is already installed.
Package glibc-common-2.34-231.amzn2023.0.1.x86_64 is already installed.
Package openssl-1:3.2.2-1.amzn2023.0.2.x86_64 is already installed.
Package openssl-devel-1:3.2.2-1.amzn2023.0.2.x86_64 is already installed.
Package perl-4:5.32.1-477.amzn2023.0.7.x86_64 is already installed.
Package wget-1.21.3-1.amzn2023.0.4.x86_64 is already installed.
Dependencies resolved.
Nothing to do.
Complete!

Yup, I did have those installed.

Greetings

I am facing the exact same issue when trying to compile on Ubuntu 22.04LTS.
The openssl-devel package and others are installed.
Found an older report: https://github.com/NagiosEnterprises/nrpe/issues/258
Is there hope of compiling 4.0.3 on Ubuntu 22.04LTS and Amazon Linux 2023, or is it likely that we have no choice but to hop onto 4.1.x?

Sincerely

If you have all the dependencies installed and are still facing build issues, it is likely you will have to try to build a newer 4.1.x version.

Greetings

I can confirm that 4.1.3 successfully compiles on Ubuntu 22.04LTS.

On a side note, I doubt this is the correct post to mention this and I am sorry, but the check_ssl_validity plugin for Nagios cannot be run on Ubuntu 22.04LTS without specifically installing the following Perl libraries, which I hope someone adds to the Nagios plugins installation docs because I do not wish anyone else the same pain of realizing some packages are missing after they have already set up Nagios servers in airtight networks:

• libcrypt-x509-perl for Crypt::X509

• libtimedate-perl for Date::Parse

• libwww-perl for LWP::Simple

• libtext-glob-perl for Text::Glob

Sincerely

Thanks all the source compile of 4.1.3 did it for me.

I appreciate all the help.

-- Donnie