OS X building issues

[IngwiePhoenix]

Hello! I already have prepared a little patch for OS X, as there are several build issues I have faced regarding OpenSSL some path setups. But what I am stuck at right now, is libevent:

[email protected] ~/W/g/k/out $ ninja
[1/2] Building C object src/package-devel/Lib.Libevent/CMakeFiles/Libevent_glue.dir/Libevent_glue.c.o
FAILED: src/package-devel/Lib.Libevent/CMakeFiles/Libevent_glue.dir/Libevent_glue.c.o 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -DHAVE_CONFIG_H -DLibevent_glue_EXPORTS -I../ -I../include -I. -I/usr/local/include -I../src/package-devel/Lib.Libevent -I../src/package-devel/Lib.Libevent/include -Isrc/package-devel/Lib.Libevent -Wsign-compare -Wformat -Wall -Wcomment -Wunused-macros -I/usr/local/include -I/usr/local/opt/openssl/include -L/usr/local/opt/openssl/lib -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk -fPIC -MD -MT src/package-devel/Lib.Libevent/CMakeFiles/Libevent_glue.dir/Libevent_glue.c.o -MF src/package-devel/Lib.Libevent/CMakeFiles/Libevent_glue.dir/Libevent_glue.c.o.d -o src/package-devel/Lib.Libevent/CMakeFiles/Libevent_glue.dir/Libevent_glue.c.o   -c ../src/package-devel/Lib.Libevent/Libevent_glue.c
clang: warning: argument unused during compilation: '-L/usr/local/opt/openssl/lib' [-Wunused-command-line-argument]
../src/package-devel/Lib.Libevent/Libevent_glue.c:1481:13: error: no member named '_internal' in 'struct evbuffer_ptr'; did you mean 'internal_'?
        evptr->ptr._internal.chain = NULL;
                   ^~~~~~~~~
                   internal_
/usr/local/include/event2/buffer.h:124:4: note: 'internal_' declared here
        } internal_;
          ^
../src/package-devel/Lib.Libevent/Libevent_glue.c:1482:13: error: no member named '_internal' in 'struct evbuffer_ptr'; did you mean 'internal_'?
        evptr->ptr._internal.pos_in_chain = 0;
                   ^~~~~~~~~
                   internal_
/usr/local/include/event2/buffer.h:124:4: note: 'internal_' declared here
        } internal_;
          ^
2 errors generated.
ninja: build stopped: subcommand failed.

Here is the current addition I made for the CMakeLists.txt file:

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3d075e3a..d0fd257e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,6 +31,18 @@ else(MSVC)
        SET(CMAKE_CXX_FLAGS_COMPRESSED "${CMAKE_CXX_FLAGS} -Os -g0")
 endif(MSVC)
 
+## OS X: Starting with OS X 10.10 and upwards, OpenSSL is no longer shipped with the system
+## itself. Therefore, one needs to install OpenSSL manually, by using a package manager like Homebrew:
+##   $ brew install openssl
+## Once done, the include path has to be extended, as well as the library search path:
+##   - add to CFLAGS: -I/usr/local/opt/openssl/include/
+##   - add to CFLAGS: -L/usr/local/opt/openssl/lib/
+##   - add to Linker flags: -L/usr/local/opt/openssl/lib/
+if(APPLE)
+  set(CMAKE_C_FLAGS   "${CFLAGS} -I/usr/local/include -I/usr/local/opt/openssl/include -L/usr/local/opt/openssl/lib")
+  set(CMAKE_EXE_LINKER_FLAGS "-L/usr/local/opt/openssl/lib")
+endif(APPLE)
+
 ## Source Code settings
 set(KONOHA_SOURCE src/konoha/konoha.c src/parser/parser.c)

Any help on fixing the libevent troubble?

Kind regards,
Ingwie

[imasahiro]

Thanks for filing an issue. I guess, compilation error on libevent is caused by interface change at libevent side - see libevent/libevent@cb9da0b#diff-2385bda88d0d693a147be8a9f79367e3R127

The original purpose of that code is initializing data, so it should be fine to replace with memset(&evptr->ptr, 0, sizeof(struct evbuffer_ptr));