Build error on OS X (unrecognized command line option '-rdynamic')

[eschnett]

I cannot build Clang on OS X El Capitan. I installed g++ via Macports; this is gcc 5.2.

julia> Pkg.build("Clang")
INFO: Building Clang
g++ wrapclang.cpp.o -rdynamic -shared -o libwrapclang.dylib -L/opt/local/libexec/llvm-3.7/lib  -L/opt/local/libexec/llvm-3.7/lib -lclang
g++: error: unrecognized command line option '-rdynamic'
make: *** [libwrapclang.dylib] Error 1
================================[ ERROR: Clang ]================================

LoadError: failed process: Process(`make`, ProcessExited(2)) [2]
while loading /Users/eschnett/.julia/v0.4/Clang/deps/build.jl, in expression starting on line 19

================================================================================

================================[ BUILD ERRORS ]================================

WARNING: Clang had build errors.

 - packages with build errors remain installed in /Users/eschnett/.julia/v0.4
 - build the package(s) and all dependencies with `Pkg.build("Clang")`
 - build a single package by running its `deps/build.jl` script

================================================================================

[Petr-Hlavenka]

Repost from Julia-users:

I've the same problem on Windows 7, julia 0.4.1 build from source on msys2, all build environment from julia

julia> Pkg.build("Clang")
INFO: Building Clang
g++ wrapclang.cpp.o -rdynamic -shared -o libwrapclang.so -L/home/phlavenk/julia/deps/llvm-3.3/build_Release/Release/lib  -L/home/phlavenk/julia/deps/llvm-3.3/build_Release/Release/lib -lclang
g++.exe: error: unrecognized command line option '-rdynamic'
Makefile:58: recipe for target 'libwrapclang.so' failed
make: *** [libwrapclang.so] Error 1
================================[ ERROR: Clang ]================================
...

If I run the compile step by myself without -rdynamic, i get following error

shell> g++ wrapclang.cpp.o -shared -o libwrapclang.so -L/home/phlavenk/julia/deps/llvm-3.3/build_Release/Release/lib  -L/home/phlavenk/julia/deps/llvm-3.3/build_Release/Release/lib -lclang
d:/msys64/home/phlavenk/julia/usr/x86_64-w64-mingw32/sys-root/mingw/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lclang
collect2.exe: error: ld returned 1 exit status

Only libclang.a is present in D:\msys64\home\phlavenk\julia\usr\lib, no libclang.so, lib or dll files are present.

Please could someone familiar with the unix build system track down why the build process is failing?
Cheers,
Petr

[bjarthur]

try using Homebrew and Xcode instead as described here: #149