It looks like other subdirectories are all added to the `BUILD_DIRS` variable in the toplevel ghc.mk. Did you do that?

Please update the wiki if that was indeed the missing step.

Otherwise, try the debugging hints on this page: https://ghc.haskell.org/trac/ghc/wiki/Building/Modifying

On Tue, Mar 24, 2015 at 7:49 AM, Tamar Christina <lonetiger@gmail.com> wrote:
Hi All,

I'm trying to figure out the build system, but can't figure out why this isn't working:

In the driver folder I created a new folder "ghc-split". The content of that is:
-rw-r--r-- 1 Tamar Users  784 Mar 22 13:18 ghc.mk
-rw-r--r-- 1 Tamar Users  513 Mar 15 11:40 ghc-split.cabal
-rw-r--r-- 1 Tamar Users 1611 Mar 15 07:30 LICENSE
-rw-r--r-- 1 Tamar Users 2162 Mar 15 07:51 Main.lhs
-rw-r--r-- 1 Tamar Users  518 Mar 22 11:45 Makefile

My Makefile contains:

dir = driver/ghc-split
TOP = ../..
include $(TOP)/mk/sub-makefile.mk

and my ghc.mk:

driver/ghc-split_USES_CABAL = YES
driver/ghc-split_PACKAGE = ghc-split
driver/ghc-split_dist-install_INSTALL = YES
driver/ghc-split_dist-install_PROGNAME = ghc-split
driver/ghc-split_dist-install_INSTALL_INPLACE = YES
driver/ghc-split_dist-install_WANT_BINDIST_WRAPPER = YES

$(eval $(call build-prog,driver/ghc-split,dist-install,0))

From https://ghc.haskell.org/trac/ghc/wiki/Building/Architecture/Idiom/StandardTargets I gather that this should
work under the standard target make all_driver/ghc-split_dist-install, however when I do a make I get:

make[2]: *** No rule to make target 'all_driver/ghc-split'.  Stop.
Makefile:72: recipe for target 'all_driver/ghc-split' failed
make[1]: *** [all_driver/ghc-split] Error 2
make[1]: Leaving directory '/home/Tamar/ghc2'
../../mk/sub-makefile.mk:45: recipe for target 'all' failed
make: *** [all] Error 2

and I haven't been able to figure out why..
Any thoughts?

Regards,
Tamar

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