On 10/23/07, Thomas Hartman wrote:

Actually I can't compile it, with or without -O2. loads fine into ghci, but when I try to create an executable I get

ghc quicksort.hs -o quicksort quicksort.o: In function `r1Nc_info': undefined reference to `QuickCheckzm1zi0zi1_TestziQuickCheck_vector_closure' quicksort.o: In function `r1Nc_info': undefined reference to `QuickCheckzm1zi0zi1_TestziQuickCheck_zdf16_closure' quicksort.o: In function `s1Ws_info': undefined reference to `QuickCheckzm1zi0zi1_TestziQuickCheck_generate_closure' quicksort.o: In function `r1Nc_srt': undefined reference to `QuickCheckzm1zi0zi1_TestziQuickCheck_vector_closure' quicksort.o: In function `r1Nc_srt': undefined reference to `QuickCheckzm1zi0zi1_TestziQuickCheck_zdf16_closure' quicksort.o: In function `rzC_srt': undefined reference to `QuickCheckzm1zi0zi1_TestziQuickCheck_generate_closure' collect2: ld returned 1 exit status

hmm, try adding --make to the ghc command line? Unfortunately, GHC doesn't automatically chase down dependencies for linking; you must specify them explicitly with -package, or tell it to auto-chase dependencies with --make. -Brent