openssl/ssl.h not found but installed with homebrew

c++ macos openssl homebrew clang++
Ricain picture Ricain · Dec 9, 2015 · Viewed 17.4k times · Source

I am working on a C++ project on my Mac running El Capitan and I get this error even after installing openssl with Homebrew:

g++ -Wall -g -std=c++11 -I../libSocket/src -I../libData/src  -c src/fsslhandler.cpp -o obj/fsslhandler.o
In file included from src/fsslhandler.cpp:1:
In file included from src/fsslhandler.h:8:
../libSocket/src/sslsocket.h:6:10: fatal error: 'openssl/ssl.h' file not found
#include <openssl/ssl.h>
         ^
1 error generated.
make: *** [obj/fsslhandler.o] Error 1

After searching for a solution I found one which does not work:

brew link openssl --force

In order to make it work, I have to add the following flags at compilation:

LDFLAGS: -L/usr/local/opt/openssl/lib

CPPFLAGS: -I/usr/local/opt/openssl/include

How to make it work without this flags?

Openssl use to work on El Capitan installed with brew, but I reinstalled OS X and update openssl with homebrew and here I am.

Thank

Answer

Ricain picture Ricain · Dec 9, 2015

I found the solution: clang was not looking in the right place.

xcode-select --install

This post resolved this issue: On mac, g++ (clang) fails to search /usr/local/include and /usr/local/lib by default

Related questions

Include OpenSSL in a CMakeList.txt file

I have a question for people who work with CMakeList.txt in C++. I want to use Podofo project (a project to parse & create pdf). So my main function is simple as: #include <iostream> #include <podofo/…

Read More
How to compile and run C/C++ in a Unix console/Mac terminal?

How can I compile/run C or C++ in Unix console or a Mac terminal? (I know it, forget it, and relearn it again. Time to write it down.)

Read More
C++ IDE for Macs

I teach a C++ course using Visual Studio. One of my students has a Mac and was looking for an IDE to use on his machine. What would be good to recommend?

Read More