Dirty hack: turn on Coveralls support in .travis.yml

Also including debugging info to figure out which directory
the .cov files get written to.

.travis.yml

@@ -2,7 +2,6 @@ language: cpp
 os:
  - linux
 compiler: 
- - clang
  - gcc
 notifications:
  email: false
@@ -26,6 +25,8 @@ before_install:
 script:
  - make $BUILDOPTS prefix=/tmp/julia install
  - cd .. && mv julia julia2
- - cd /tmp/julia/share/julia/test && /tmp/julia/bin/julia-debug runtests.jl all
+ - cd /tmp/julia/share/julia/test && JULIA_CPU_CORES=1 /tmp/julia/bin/julia-debug --code-coverage=all runtests.jl all
  - cd - && mv julia2 julia
+ - cd /tmp/julia/share/julia
+ - /tmp/julia/bin/julia-debug -e 'Pkg.add("JSON"); Pkg.clone("git://github.com/timholy/Coverage.jl.git"); using Coverage; Coveralls.submit(Coveralls.process_folder("base"))'
  - echo "Ready for packaging..."

src/debuginfo.cpp

@@ -579,6 +579,7 @@ extern "C" void jl_write_coverage_data(void)
  std::ifstream inf(filename.c_str());
  if (inf.is_open()) {
  std::string outfile = filename + ".cov";
+ JL_PRINTF(JL_STDOUT, "Writing %s\n", outfile.c_str());
  std::ofstream outf(outfile.c_str(), std::ofstream::trunc | std::ofstream::out);
  char line[1024];
  int l = 1;