david@ubuntu:~/ex_doc$ mix compile git submodule update --init Submodule 'sundown' () registered for path 'sundown' From git://github.com/vmg/sundown * [new branch] gh-pages -> origin/gh-pages * [new branch] master -> origin/master Submodule path 'sundown': checked out '975df6267cbc798ecfcb6948364cd978dc2bf36f' cd sundown && make make[1]: Entering directory `/home/david/ex_doc/sundown' gcc -c -g -O3 -fPIC -Wall -Werror -Wsign-compare -Isrc -Ihtml -c -o src/markdown.o src/markdown.c gcc -c -g -O3 -fPIC -Wall -Werror -Wsign-compare -Isrc -Ihtml -c -o src/stack.o src/stack.c gcc -c -g -O3 -fPIC -Wall -Werror -Wsign-compare -Isrc -Ihtml -c -o src/buffer.o src/buffer.c gcc -c -g -O3 -fPIC -Wall -Werror -Wsign-compare -Isrc -Ihtml -c -o src/autolink.o src/autolink.c gcc -c -g -O3 -fPIC -Wall -Werror -Wsign-compare -Isrc -Ihtml -c -o html/html.o html/html.c gcc -c -g -O3 -fPIC -Wall -Werror -Wsign-compare -Isrc -Ihtml -c -o html/html_smartypants.o html/html_smartypants.c gcc -c -g -O3 -fPIC -Wall -Werror -Wsign-compare -Isrc -Ihtml -c -o html/houdini_html_e.o html/houdini_html_e.c gcc -c -g -O3 -fPIC -Wall -Werror -Wsign-compare -Isrc -Ihtml -c -o html/houdini_href_e.o html/houdini_href_e.c gcc -g -O3 -Wall -Werror -shared -Wl src/markdown.o src/stack.o src/buffer.o src/autolink.o html/html.o html/html_smartypants.o html/houdini_html_e.o html/houdini_href_e.o -o libsundown.so.1 gcc: error: unrecognized command line option ‘-Wl’ make[1]: *** [libsundown.so.1] Error 1 make[1]: Leaving directory `/home/david/ex_doc/sundown' make: *** [sundown/libsundown.so] Error 2 

gcc (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2