Simplify timestamp restoration
[ghc.git] / Makefile
1 # -----------------------------------------------------------------------------
2 #
3 # (c) 2009 The University of Glasgow
4 #
5 # This file is part of the GHC build system.
6 #
7 # To understand how the build system works and how to modify it, see
8 # http://hackage.haskell.org/trac/ghc/wiki/Building/Architecture
9 # http://hackage.haskell.org/trac/ghc/wiki/Building/Modifying
10 #
11 # -----------------------------------------------------------------------------
12
13 ifeq "$(wildcard distrib/)" ""
14
15 # We're in a bindist
16
17 .PHONY: default
18 default:
19 @echo 'Run "make install" to install'
20 @false
21
22 .PHONY: install
23 install:
24 $(MAKE) -r --no-print-directory -f ghc.mk install BINDIST=YES NO_INCLUDE_DEPS=YES
25
26 .PHONY: show
27 show:
28 $(MAKE) -r --no-print-directory -f ghc.mk $@
29
30 else
31
32 default : all
33 @:
34
35 # For help, type 'make help'
36 .PHONY: help
37 help :
38 @cat MAKEHELP
39
40 ifneq "$(findstring clean,$(MAKECMDGOALS))" ""
41 -include mk/config.mk
42 else
43 include mk/config.mk
44 ifeq "$(ProjectVersion)" ""
45 $(error Please run ./configure first)
46 endif
47 endif
48
49 include mk/custom-settings.mk
50
51 # No need to update makefiles for these targets:
52 REALGOALS=$(filter-out bootstrapping-files framework-pkg clean clean_% distclean maintainer-clean show help,$(MAKECMDGOALS))
53
54 # On Solaris, the builtin test doesn't support -nt, you have to use
55 # /usr/bin/test. On MSYS, however, /usr/bin/test does not exist. How
56 # nice.
57 TEST=$(if $(wildcard /usr/bin/test),/usr/bin/test,test)
58
59 # configure touches certain files even if they haven't changed. This
60 # can mean a lot of unnecessary recompilation after a re-configure, so
61 # here we cache the old versions of these files so we can restore the
62 # timestamps.
63 %.old: %
64 @set -x && [ -f $@ ] && cmp -s $< $@ || cp -p $< $@
65 touch -r $@ $<
66
67
68 # NB. not the same as saying '%: ...', which doesn't do the right thing:
69 # it does nothing if we specify a target that already exists.
70 .PHONY: $(REALGOALS)
71 $(REALGOALS) all: mk/config.mk.old mk/project.mk.old compiler/ghc.cabal.old
72 @echo "===--- updating makefiles phase 0"
73 $(MAKE) -r --no-print-directory -f ghc.mk phase=0 just-makefiles
74 ifneq "$(OMIT_PHASE_1)" "YES"
75 @echo "===--- updating makefiles phase 1"
76 $(MAKE) -r --no-print-directory -f ghc.mk phase=1 just-makefiles
77 endif
78 ifneq "$(OMIT_PHASE_2)" "YES"
79 @echo "===--- updating makefiles phase 2"
80 $(MAKE) -r --no-print-directory -f ghc.mk phase=2 just-makefiles
81 endif
82 ifneq "$(OMIT_PHASE_3)" "YES"
83 @echo "===--- updating makefiles phase 3"
84 $(MAKE) -r --no-print-directory -f ghc.mk phase=3 just-makefiles
85 endif
86 @echo "===--- finished updating makefiles"
87 $(MAKE) -r --no-print-directory -f ghc.mk $@
88
89 binary-dist:
90 ifeq "$(mingw32_TARGET_OS)" "1"
91 $(MAKE) -r --no-print-directory -f ghc.mk windows-binary-dist
92 $(MAKE) -r --no-print-directory -f ghc.mk windows-installer
93 else
94 rm -f bindist-list
95 $(MAKE) -r --no-print-directory -f ghc.mk bindist BINDIST=YES
96 $(MAKE) -r --no-print-directory -f ghc.mk binary-dist
97 endif
98
99 clean distclean maintainer-clean:
100 $(MAKE) -r --no-print-directory -f ghc.mk $@ CLEANING=YES
101 test ! -d testsuite || $(MAKE) -C testsuite $@
102
103 $(filter clean_%, $(MAKECMDGOALS)) : clean_% :
104 $(MAKE) -r --no-print-directory -f ghc.mk $@ CLEANING=YES
105
106 bootstrapping-files show:
107 $(MAKE) -r --no-print-directory -f ghc.mk $@
108
109 ifeq "$(darwin_TARGET_OS)" "1"
110 framework-pkg:
111 $(MAKE) -C distrib/MacOS $@
112 endif
113
114 # If the user says 'make A B', then we don't want to invoke two
115 # instances of the rule above in parallel:
116 .NOTPARALLEL:
117
118 endif