Support printing `integer-simple` Integers in GHCi

This means that `:p` no longer leaks the implementation details of
`Integer` with `integer-simple`. The `print037` test case should
exercise all possible code paths for GHCi's code around printing
`Integer`s (both in `integer-simple` and `integer-gmp`).

`ghc` the package now also has a Cabal `integer-simple` flag (like the
`integer-gmp` one).

1 files changed, 1 insertions, 0 deletions

diff --git a/ghc.mk b/ghc.mk
index d90800b4f2..351012c3b0 100644
--- a/ghc.mk
+++ b/ghc.mk
@@ -616,6 +616,7 @@ libraries/base_dist-install_CONFIGURE_OPTS += --flags=integer-gmp
 compiler_stage2_CONFIGURE_OPTS += --flags=integer-gmp
 else ifeq "$(INTEGER_LIBRARY)" "integer-simple"
 libraries/base_dist-install_CONFIGURE_OPTS += --flags=integer-simple
+compiler_stage2_CONFIGURE_OPTS += --flags=integer-simple
 else
 $(error Unknown integer library: $(INTEGER_LIBRARY))
 endif