Force openssl in CMake targets

[afjoseph]

Fixes #343

Hey guys. I'm having the same issue as #343. Here's the repro steps. My machine is MacOS M1 Monterey 12.6.6 and I'm on the latest commit as of writing:

git clone https://github.com/rizinorg/rz-ghidra
cd rz-ghidra
git submodule update --init
# OpenSSL installed with homebrew
pkg-config --cflags --libs openssl
-I/opt/homebrew/Cellar/openssl@3/3.2.1/include -L/opt/homebrew/Cellar/openssl@3/3.2.1/lib -lssl -lcrypto
cmake -DCMAKE_PREFIX_PATH=/Users/afjoseph/dev/misc/rizin/build -B build && cmake --build build --verbose

The build fails with the following error:

        [ 36%] Building CXX object CMakeFiles/core_ghidra.dir/src/core_ghidra.cpp.o
        /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -DRZ_GHIDRA_SLEIGHHOME_DEFAULT=\"/usr/local/lib/rizin/plugins/rz_ghidra_sleigh\" -Dcore_ghidra_EXPORTS -I/Users/afjoseph/dev/misc/rz-ghidra/ghidra/ghidra/Ghidra/Features/Decompiler/src/decompile/cpp -I/Users/afjoseph/dev/misc/rz-ghidra/third-party/pugixml/src -isystem /opt/homebrew/include/librz -isystem /opt/homebrew/include/librz/sdb -std=gnu++11 -arch arm64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.1.sdk -mmacosx-version-min=12.6 -fPIC -MD -MT CMakeFiles/core_ghidra.dir/src/core_ghidra.cpp.o -MF CMakeFiles/core_ghidra.dir/src/core_ghidra.cpp.o.d -o CMakeFiles/core_ghidra.dir/src/core_ghidra.cpp.o -c /Users/afjoseph/dev/misc/rz-ghidra/src/core_ghidra.cpp
        In file included from /Users/afjoseph/dev/misc/rz-ghidra/src/core_ghidra.cpp:9:
        In file included from /Users/afjoseph/dev/misc/rz-ghidra/src/ArchMap.h:10:
        In file included from /opt/homebrew/include/librz/rz_core.h:7:
        In file included from /opt/homebrew/include/librz/rz_main.h:9:
        In file included from /opt/homebrew/include/librz/rz_getopt.h:4:
        /opt/homebrew/include/librz/rz_util.h:21:10: fatal error: 'openssl/bn.h' file not found
        #include <openssl/bn.h>
                 ^~~~~~~~~~~~~~
        1 error generated.
        make[2]: *** [CMakeFiles/core_ghidra.dir/src/core_ghidra.cpp.o] Error 1
        make[1]: *** [CMakeFiles/core_ghidra.dir/all] Error 2
        make: *** [all] Error 2

This PR fixes tells CMake to require OpenSSL in the CMake targets, which would add the necessary compile flags (e.g., pkg-config --cflags openssl).

[ret2libc]

I think this error should be solved in Rizin itself.

It can be reproduced with this small test:
CMakeLists.txt:

cmake_minimum_required(VERSION 3.10)
project(MyRizinProject)

# Find the Rizin package (make sure it is installed and CMake can find it)
find_package(Rizin COMPONENTS Core REQUIRED)

# Add the executable that we want to compile
add_executable(test_rizin test_rizin.c)

# Link the Rizin libraries to our executable
target_link_libraries(test_rizin PUBLIC Rizin::Core)

test_rizin.c

#include <stdio.h>
#include <rz_util.h>

int main(int argc, char **argv) {
	char *s = rz_str_newf("core %p\n", argv);
	printf("s = %s\n", s);
	free(s);
	return 0;
}

cmake --build build
-- Configuring done (0.0s)
-- Generating done (0.0s)
-- Build files have been written to: /tmp/rizin_pkg/build
[ 50%] Building C object CMakeFiles/test_rizin.dir/test_rizin.c.o
In file included from /tmp/rizin_pkg/test_rizin.c:2:
/opt/homebrew/include/librz/rz_util.h:21:10: fatal error: 'openssl/bn.h' file not found
#include <openssl/bn.h>
         ^~~~~~~~~~~~~~
1 error generated.
make[2]: *** [CMakeFiles/test_rizin.dir/test_rizin.c.o] Error 1
make[1]: *** [CMakeFiles/test_rizin.dir/all] Error 2
make: *** [all] Error 2

I'm not a Cmake guru unfortunately so I was never able to fix it myself, but it should likely be fixed somewhere in https://github.com/rizinorg/rizin/blob/dev/librz/RzModulesConfig.cmake.in .

[afjoseph]

@ret2libc Thanks for looking into it. I agree this should be fixed in core Rizin. I'll look into it and modify the PR (or just close this one). Expect it sometime in the next 1-2 days.

Many thanks for taking a look at it ❤️

[ret2libc]

Sure thing. I actually have some pending changes to fix this thing in Rizin itself. I was able to get some help to fix it once and for all. Still need to adjust a few things and push the PR though.