Hi! We're fairly happy users of ghc in my department. We use it widely for instruction and to some degree for research. I'm the fellow tasked with maintaining the local installation, and I have a couple of simple and seemingly related problems that I'm sure have easy solutions, though I haven't been able to find them. 1) I'd like to embed an additional library search directory in ghc so that it does the equivalent of -L/path/to/extra/dir every time it's used to link something. Unfortunately, our libgmp resides in a nonstandard directory and so *every time* someone wants to compile they must ghc -L/lusr/gnu/lib ... to find -lgmp. I promise, we have thought about moving libgmp into the default search path, and setting $LD_LIBRARY_PATH, but those break a lot of other stuff in our setup, and are really not practical in our environment. We build all of our utilities from source (including ghc) so I would be happy & able to tweak some setting during configure or make or even hack the source--but I can't figure out where to change it. I figured it'd be in configure.mk(.in) but adding "-R /lusr/gnu/lib" to the LD command line did not do the trick in generating a ghc binary that calls ld/collect2 in the same way. 2) When building something, I often need to add an include directory. As an example, GSLHaskell: % runhaskell -I/lusr/gnu/include Setup.hs build [...] [16 of 17] Compiling GSL.Plot ( GSL/Plot.hs, dist/build/GSL/Plot.p_o ) [17 of 17] Compiling GSL ( GSL.hs, dist/build/GSL.p_o ) GSL/gslaux.c:2:26: gsl/gsl_blas.h: No such file or directory GSL/gslaux.c:3:28: gsl/gsl_linalg.h: No such file or directory gsl/gsl_blas.h and friends are indeed in /lusr/gnu/include and I'd like to do the equivalent of adding a $CFLAGS of -I/lusr/gnu/include to the build (or to every build--it'd be grand if that was included by default, though not as necessary as item #1 above) but can't figure out how. I'm working with ghc-6.6 on ubuntu linux, in case that matters. I'm not sure what else is relevant, but am happy to provide details as needed. Help? Thanks in advance!