Merge branch 'master' of http://darcs.haskell.org/ghc
[ghc.git] / rules / build-dependencies.mk
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 define build-dependencies
14 $(call trace, build-dependencies($1,$2,$3))
15 $(call profStart, build-dependencies($1,$2,$3))
16 # $1 = dir
17 # $2 = distdir
18 # $3 = GHC stage to use (0 == bootstrapping compiler)
19
20 $1_$2_depfile_haskell = $$($1_$2_depfile_base).haskell
21 $1_$2_depfile_c_asm = $$($1_$2_depfile_base).c_asm
22
23 $1_$2_C_FILES_DEPS = $$(filter-out $$($1_$2_C_FILES_NODEPS),$$($1_$2_C_FILES))
24
25 $1_$2_MKDEPENDHS_FLAGS = -dep-makefile $$($1_$2_depfile_haskell).tmp $$(foreach way,$$($1_$2_WAYS),-dep-suffix "$$(patsubst %o,%,$$($$(way)_osuf))")
26 $1_$2_MKDEPENDHS_FLAGS += -include-pkg-deps
27
28 ifneq "$$(NO_GENERATED_MAKEFILE_RULES)" "YES"
29
30 # Some of the Haskell files (e.g. utils/hsc2hs/Main.hs) (directly or
31 # indirectly) include the generated includes files.
32 $$($1_$2_depfile_haskell) : $$(includes_H_CONFIG) $$(includes_H_PLATFORM)
33
34 $$($1_$2_depfile_haskell) : $$($1_$2_HS_SRCS) $$($1_$2_HS_BOOT_SRCS) $$($1_$2_HC_MK_DEPEND_DEP) | $$$$(dir $$$$@)/.
35 $$(call removeFiles,$$@.tmp)
36 ifneq "$$($1_$2_HS_SRCS)" ""
37 "$$($1_$2_HC_MK_DEPEND)" -M \
38 $$(filter-out -split-objs, $$($1_$2_$$(firstword $$($1_$2_WAYS))_ALL_HC_OPTS)) \
39 $$($1_$2_MKDEPENDHS_FLAGS) \
40 $$($1_$2_HS_SRCS)
41 endif
42 echo "$1_$2_depfile_haskell_EXISTS = YES" >> $$@.tmp
43 ifneq "$$($1_$2_SLASH_MODS)" ""
44 for dir in $$(sort $$(foreach mod,$$($1_$2_SLASH_MODS),$1/$2/build/$$(dir $$(mod)))); do \
45 if test ! -d $$$$dir; then mkdir -p $$$$dir; fi \
46 done
47 endif
48 # Some packages are from the bootstrapping compiler, so are not
49 # within the build tree. On Windows this causes a problem as they look
50 # like bad rules, due to the two colons, so we filter them out.
51 grep -v ' : [a-zA-Z]:/' $$@.tmp > $$@.tmp2
52 sed '/hs$$$$/ p ; \
53 /hs$$$$/ s/o /hi /g ; \
54 /hs$$$$/ s/:/ : %hi: %o / ; \
55 /hs$$$$/ s/^/$$$$(eval $$$$(call hi-rule,/ ; \
56 /hs$$$$/ s/$$$$/))/ ; \
57 /hs-boot$$$$/ p ; \
58 /hs-boot$$$$/ s/o-boot /hi-boot /g ; \
59 /hs-boot$$$$/ s/:/ : %hi-boot: %o-boot / ; \
60 /hs-boot$$$$/ s/^/$$$$(eval $$$$(call hi-rule,/ ; \
61 /hs-boot$$$$/ s/$$$$/))/' \
62 $$@.tmp2 > $$@
63
64 # Some of the C files (directly or indirectly) include the generated
65 # includes files.
66 $$($1_$2_depfile_c_asm) : $$(includes_H_CONFIG) $$(includes_H_PLATFORM)
67
68 $$($1_$2_depfile_c_asm) : $$($1_$2_C_FILES_DEPS) $$($1_$2_S_FILES) | $$$$(dir $$$$@)/.
69 $$(call removeFiles,$$@.tmp)
70 ifneq "$$(strip $$($1_$2_C_FILES_DEPS)$$($1_$2_S_FILES))" ""
71 # We ought to actually do this for each way in $$($1_$2_WAYS), but then
72 # it takes a long time to make the C deps for the RTS (30 seconds rather
73 # than 3), so instead we just pass the list of ways in and let addCFileDeps
74 # copy the deps for each way on the assumption that they are the same
75 $$(foreach f,$$($1_$2_C_FILES_DEPS) $$($1_$2_S_FILES), \
76 $$(call addCFileDeps,$1,$2,$$($1_$2_depfile_c_asm),$$f,$$($1_$2_WAYS)))
77 $$(call removeFiles,$$@.bit)
78 endif
79 echo "$1_$2_depfile_c_asm_EXISTS = YES" >> $$@.tmp
80 mv $$@.tmp $$@
81
82 endif # NO_GENERATED_MAKEFILE_RULES
83
84 # Note sed magic above: mkdependC can't do -odir stuff, so we have to
85 # munge the dependencies it generates to refer to the correct targets.
86
87 $(call profEnd, build-dependencies($1,$2,$3))
88 endef
89
90 # This comment is outside the "define addCFileDeps" as that definition
91 # is a list of command lines, and if it is inside it then we pass this
92 # comment to the shell every time we call the definition.
93 # $1 = dir
94 # $2 = distdir
95 # $3 = depfile
96 # $4 = file
97 # $5 = ways
98 #
99 # The formatting of this definition (e.g. the blank line above) is
100 # important, in order to get make to generate the right makefile code.
101 #
102 # 's|\\|/|g'
103 # We first normalise all slashes to be forward slashes. Note that
104 # $(TOP) also uses forward slashes.
105 # 's| /$$| \\|'
106 # But now we need to fix the line continuation characters that we
107 # just broke.
108 # "1s|\.o|\.$($w_osuf)|"
109 # We will have dependencies for .o files, so we need to fix them up
110 # for the right object suffix for the way we're doing
111 # "1s|^|$(dir $4)|"
112 # We always get deps for just foo.o when the file we're making is
113 # a/b/c/foo.o, so we need to prepend the directory of the source file
114 # "1s|$1/|$1/$2/build/|"
115 # Well, almost. We actually need to insert e.g. "dist/build" in the
116 # middle of that directory
117 # "1s|$2/build/$2/build|$2/build|g"
118 # But some source files, e.g. sm/Evac_thr.c, are also inside the
119 # "dist/build" directory, so now we've just made
120 # "dist/build/dist/build", so we need to remove the duplication
121 # again
122 # "s|$(TOP)/||g$(CASE_INSENSITIVE_SED)"
123 # Finally, when making deps for packages like ghc stage2, we have
124 # some include paths for packages registered in the in-tree package
125 # database. These include paths are full (i.e. not relative) paths,
126 # which means that the "cpp -MM" output uses full paths in some cases.
127 # This causes 2 problems:
128 # * they don't match up with the rules to rebuild the files, where
129 # appropriate.
130 # * on Windows, make interprets the colon in c:/foo/bar.h as make
131 # syntax.
132 # So we sed off $(TOP). Unfortunately, on Windows, the case for the
133 # drive letter is sometimes different in what $(TOP) starts with, and
134 # what the path in the package database starts with. We therefore
135 # need to do the substitution case-insensitively on Windows. But
136 # the s///i modifier isn't portable, so we set CASE_INSENSITIVE_SED
137 # to "i" on Windows and "" on any other platform.
138 define addCFileDeps
139
140 $(CPP) $($1_$2_MKDEPENDC_OPTS) $($1_$2_$(firstword $($1_$2_WAYS))_ALL_CC_OPTS) $($(basename $4)_CC_OPTS) -MM $4 -MF $3.bit
141 $(foreach w,$5,sed -e 's|\\|/|g' -e 's| /$$| \\|' -e "1s|\.o|\.$($w_osuf)|" -e "1s|^|$(dir $4)|" -e "1s|$1/|$1/$2/build/|" -e "1s|$2/build/$2/build|$2/build|g" -e "s|$(TOP)/||g$(CASE_INSENSITIVE_SED)" $3.bit >> $3.tmp &&) true
142 endef
143
144 ifeq "$(Windows_Host)" "YES"
145 CASE_INSENSITIVE_SED = i
146 else
147 CASE_INSENSITIVE_SED =
148 endif
149