Build Failure

[JaredCrean2]

Trying to build with julia 0.5 I got the following error:

jared@k475:~/.julia/v0.5/Clang/deps$ julia5 ./build.jl 
g++ wrapclang.cpp -fPIC -c -o wrapclang.cpp.o -I/home/jared/build/clang_3.7/include -g -I/home/jared/build/clang_3.7/include  -fPIC -fvisibility-inlines-hidden -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wcovered-switch-default -Wnon-virtual-dtor -Werror=date-time -std=c++11 -ffunction-sections -fdata-sections -O3 -DNDEBUG -fno-exceptions -fno-rtti  -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Wall -Wno-strict-aliasing -fno-omit-frame-pointer -fPIC 
g++: error: unrecognized command line option ‘-Wcovered-switch-default’
make: *** [wrapclang.cpp.o] Error 1
ERROR: LoadError: clang headers could not be found and BUILD_LLVM_CLANG=1 not specified in Make.user
Try setting BUILD_LLVM_CLANG=1 in Make.user in /mnt/external/build/julia_0.5/usr/bin and try again.
 in error(::String) at ./error.jl:21
 in include_from_node1(::String) at ./loading.jl:488
 in process_options(::Base.JLOptions) at ./client.jl:262
 in _start() at ./client.jl:318
while loading /home/jared/.julia/v0.5/Clang/deps/build.jl, in expression starting on line 59

I am using g++ 4.8.4

[ecx2093]

I am no expert but I am going through the same process of building Clang.jl. Did you build Julia from source with BUILD_LLVM_CLANG=1 in Make.user? Which llvm are you using?

[JaredCrean2]

I did not add BUILD_LLVM_CLANG=1 in Make.user, but I did download clang+llvm-3.7.0-x86_64_linux-gnu-ubuntu-14.04.tar.xz and prepend its /bin to my PATH, its /lib to my LD_LIBRARY_PATH, and its /include to my CPATH.

Out of curiosity, when executing this line:

g++ wrapclang.cpp -fPIC -c -o wrapclang.cpp.o -I/home/jared/build/clang_3.7/include -g -I/home/jared/build/clang_3.7/include  -fPIC -fvisibility-inlines-hidden -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wcovered-switch-default -Wnon-virtual-dtor -Werror=date-time -std=c++11 -ffunction-sections -fdata-sections -O3 -DNDEBUG -fno-exceptions -fno-rtti  -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Wall -Wno-strict-aliasing -fno-omit-frame-pointer -fPIC 

did you use g++ or clang as the compiler? I googled a bit and I don't think any versions of g++ support the option -Wcovered-switch-default.

[ecx2093]

I'm now getting a successful build with the latest commit, but when I go to load the package I get the following error. Here are the results:

julia> Pkg.build("Clang")
INFO: Building Clang
g++ wrapclang.cpp.o -rdynamic -shared -o libwrapclang.so -L/usr/lib/llvm-3.9/lib  -L/usr/lib/llvm-3.9/lib -lclang

julia> using Clang.cindex
: CommandLine Error: Option 'help-list' registered more than once!
LLVM ERROR: inconsistency in registered CommandLine options

I am using ubuntu 16.10 with llvm/clang 3.9. This problem seems to be related to JuliaLang/julia#12644 which shows that other packages are having the same problem.