# -------- A Fast build configured for cross-compilation ----------------------

ifeq "$(BuildFlavour)" "quick-cross"

SRC_HC_OPTS = -H64m -O0 -auto-all -caf-all -prof

GhcStage1HcOpts = -O -fllvm -auto-all -caf-all -prof

GhcStage2HcOpts = -O0 -fllvm

GhcLibHcOpts = -O -fllvm -auto-all -caf-all -prof

SplitObjs = NO

HADDOCK_DOCS = NO

BUILD_DOCBOOK_HTML = NO

BUILD_DOCBOOK_PS = NO

BUILD_DOCBOOK_PDF = NO

INTEGER_LIBRARY = integer-simple

Stage1Only = YES

DYNAMIC_BY_DEFAULT = NO

DYNAMIC_GHC_PROGRAMS = NO

endif

echo "compiler_stage1_depfile_haskell_EXISTS = YES" >> compiler/stage1/build/.depend-v.haskell.tmp

for dir in compiler/stage1/build/./ compiler/stage1/build/CodeGen/ compiler/stage1/build/CodeGen/Platform/ compiler/stage1/build/Hoopl/ compiler/stage1/build/Llvm/ compiler/stage1/build/LlvmCodeGen/ compiler/stage1/build/PPC/ compiler/stage1/build/RegAlloc/ compiler/stage1/build/RegAlloc/Graph/ compiler/stage1/build/RegAlloc/Linear/ compiler/stage1/build/RegAlloc/Linear/PPC/ compiler/stage1/build/RegAlloc/Linear/SPARC/ compiler/stage1/build/RegAlloc/Linear/X86/ compiler/stage1/build/RegAlloc/Linear/X86_64/ compiler/stage1/build/SPARC/ compiler/stage1/build/SPARC/CodeGen/ compiler/stage1/build/Vectorise/ compiler/stage1/build/Vectorise/Builtins/ compiler/stage1/build/Vectorise/Generic/ compiler/stage1/build/Vectorise/Monad/ compiler/stage1/build/Vectorise/Type/ compiler/stage1/build/Vectorise/Utils/ compiler/stage1/build/X86/; do if test ! -d $dir; then mkdir -p $dir; fi done

grep -v ' : [a-zA-Z]:/' compiler/stage1/build/.depend-v.haskell.tmp > compiler/stage1/build/.depend-v.haskell.tmp2

sed -e '/hs$/ p' -e '/hs$/ s/o /hi /g' -e '/hs$/ s/:/ : %hi: %o /' -e '/hs$/ s/^/$(eval $(call hi-rule,/' -e '/hs$/ s/$/))/' -e '/hs-boot$/ p' -e '/hs-boot$/ s/o-boot /hi-boot /g' -e '/hs-boot$/ s/:/ : %hi-boot: %o-boot /' -e '/hs-boot$/ s/^/$(eval $(call hi-rule,/' -e '/hs-boot$/ s/$/))/' compiler/stage1/build/.depend-v.haskell.tmp2 > compiler/stage1/build/.depend-v.haskell

utils/ghc-pkg/ghc.mk:46: warning: overriding commands for target `install_utils/ghc-pkg_dist_wrapper'

utils/ghc-pkg/ghc.mk:37: warning: ignoring old commands for target `install_utils/ghc-pkg_dist_wrapper'

make[1]: *** No rule to make target `libraries/terminfo/dist-boot/build/System/Console/Terminfo.p_hi', needed by `utils/ghc-pkg/dist/build/Main.o'. Stop.

On Jul 9, 2014, at 2:27 PM, Ben Gamari <bgamari.foss@gmail.com> wrote:

Michael Jones <mike@proclivis.com> writes:

I am having problems building a GHC cross compiler for Linux (Yocto on
a Wandboard) running on a Cortex A9, and need some advice on how to
debug it.

Sorry for the delay, almost overlooked this one!

The cross compiler produces an executable that runs on the Target, but
fails to print. So I need help coming up with a strategy to narrow
down the root cause.

Some details:

The application:

main = do
putStrLn "Haskell start"

The command line options work. The program runs, and I can step
through assembly. Debug data is printed to the console. But putStrLn
fails, and program enters an infinite loop.

Hmmm, very peculiar. I would probably begin by compiling with `-auto-all
-caf-all -prof` and run the resulting executable with `+RTS -xc`. SIGINT
the process after a second or so and see what the backtrace looks like.

While worth trying, this probably won't help too much as your problem is
likely RTS-related. You might try stracing the executable and see if it
is ever even trying a syscall.

Unfortunately, I doubt it is as the program appears to be hitting heap
and stack overflows. This is quite perplexing. I'm going to try to
reproduce the issue on my end.

Cheers,

- Ben