[commit: ghc] master: Add deriveConstants to the dep files we build in phase 0 (6579425)

[Ian Lynagh]

Repository : http://darcs.haskell.org/ghc.git/

On branch  : master

https://github.com/ghc/ghc/commit/657942546768b777764cf8a96adc9b089e7f8584

>---------------------------------------------------------------

commit 657942546768b777764cf8a96adc9b089e7f8584
Author: Ian Lynagh <ian at well-typed.com>
Date:   Sat Apr 20 15:29:32 2013 +0100

    Add deriveConstants to the dep files we build in phase 0
    
    Dependency problem was discovered by int-e.
    
    I've also added some comments about what's going on.

>---------------------------------------------------------------

 ghc.mk | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/ghc.mk b/ghc.mk
index d873070..ae5c3ed 100644
--- a/ghc.mk
+++ b/ghc.mk
@@ -1276,13 +1276,28 @@ endif
 # -----------------------------------------------------------------------------
 # Numbered phase targets
 
+# In phase 1, we'll be building dependency files for most things
+# built by the bootstrapping compiler while make is 'include'ing
+# makefiles. But in order to build dependency files, we'll need to
+# build any automatically generated .hs files, which means that
+# we'll need to be able to build any tools that generate .hs files
+# etc. But in order to do that, we need to already know the
+# dependencies for those tools, so we build their dependency files
+# here.
 .PHONY: phase_0_builds
 phase_0_builds: $(utils/ghc-pkg_dist_depfile_haskell)
 phase_0_builds: $(utils/ghc-pkg_dist_depfile_c_asm)
+# hsc2hs is needed, e.g. to make the .hs files for hpc.
 phase_0_builds: $(utils/hsc2hs_dist_depfile_haskell)
 phase_0_builds: $(utils/hsc2hs_dist_depfile_c_asm)
+# genprimopcode is needed ot make the .hs-incl files that are in the
+# ghc package.
 phase_0_builds: $(utils/genprimopcode_dist_depfile_haskell)
 phase_0_builds: $(utils/genprimopcode_dist_depfile_c_asm)
+# deriveConstants is used to create header files included in the
+# ghc package.
+phase_0_builds: $(utils/deriveConstants_dist_depfile_haskell)
+phase_0_builds: $(utils/deriveConstants_dist_depfile_c_asm)
 
 .PHONY: phase_1_builds
 phase_1_builds: $(PACKAGE_DATA_MKS)