Replying to [comment:16 carter]: OK, I see what the issue is:
here an error from ./configure --with-gcc=clang --with-cpp=gcc
(where i try to add the cpp flags to mk/config.in with a patch i've not pushed yet)
[...] with the associated log being
{{{ This file contains any messages produced by compilers while running configure, to aid debugging if configure makes a mistake.
It was created by Haskell terminfo package configure 0.2, which was generated by GNU Autoconf 2.69. Invocation command line was
$ ./configure --with-compiler=ghc CFLAGS= -m64 -fno-stack-protector LDFLAGS= -m64 CPPFLAGS= -m64 -E -undef -traditional --with-cc=gcc --with-gcc=/Users/carter/bin/gcc
[...] configure:2413: checking whether the C compiler works configure:2435: gcc -m64 -fno-stack-protector -m64 -E -undef -traditional -m64 conftest.c >&5 [...] }}} Wait a minute! Why are those flags passed to the C compiler at all. I
#8683: add "cpp program" and "cpp program options" to settings file -------------------------------------+------------------------------------ Reporter: carter | Owner: Type: feature request | Status: patch Priority: normal | Milestone: 7.8.1 Component: Compiler | Version: 7.7 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: #8439 -------------------------------------+------------------------------------ Comment (by trommler): Replying to [comment:20 trommler]: thought they were meant to be used by ghc to preprocess Haskell files?! -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8683#comment:21 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler