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