Include usg_file_hash in ghc --show-iface output
[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://ghc.haskell.org/trac/ghc/wiki/Building/Architecture
9 # http://ghc.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 "$$(patsubst %o,%,$$($$(way)_osuf))")
26 $1_$2_MKDEPENDHS_FLAGS += -include-pkg-deps
27 $1_$2_MKDEPENDHS_FLAGS += $(addprefix -I,$($1_INCLUDE_DIRS))
28
29 ifneq "$$(NO_GENERATED_MAKEFILE_RULES)" "YES"
30
31 # Some of the Haskell files (e.g. utils/hsc2hs/Main.hs) (directly or
32 # indirectly) include the generated includes files.
33 $$($1_$2_depfile_haskell) : $$(includes_H_CONFIG) $$(includes_H_PLATFORM)
34
35 $$($1_$2_depfile_haskell) : $$($1_$2_HS_SRCS) $$($1_$2_HS_BOOT_SRCS) $$$$($1_$2_HC_MK_DEPEND_DEP) | $$$$(dir $$$$@)/.
36 $$(call removeFiles,$$@.tmp)
37 ifneq "$$($1_$2_HS_SRCS)" ""
38 "$$($1_$2_HC_MK_DEPEND)" -M \
39 $$($1_$2_$$(firstword $$($1_$2_WAYS))_MOST_DIR_HC_OPTS) \
40 $$($1_$2_MKDEPENDHS_FLAGS) \
41 $$($1_$2_HS_SRCS)
42 endif
43 echo "$1_$2_depfile_haskell_EXISTS = YES" >> $$@.tmp
44 ifneq "$$($1_$2_SLASH_MODS)" ""
45 for dir in $$(sort $$(foreach mod,$$($1_$2_SLASH_MODS),$1/$2/build/$$(dir $$(mod)))); do \
46 if test ! -d $$$$dir; then mkdir -p $$$$dir; fi \
47 done
48 endif
49 # Some packages are from the bootstrapping compiler, so are not
50 # within the build tree. On Windows this causes a problem as they look
51 # like bad rules, due to the two colons, so we filter them out.
52 grep -v ' : [a-zA-Z]:/' $$@.tmp > $$@.tmp2
53 # Insert the calls to hi-rule. Basically, we look for the
54 # Foo.dyn_o Foo.o : Foo.hs
55 # lines, and create corresponding hi-rule lines
56 # <dollar>(eval <dollar>(call hi-rule,Foo.dyn_hi Foo.hi : %hi: %o Foo.hs))
57 sed -e '/hs$$$$/ p' -e '/hs$$$$/ s/o /hi /g' \
58 -e '/hs$$$$/ s/:/ : %hi: %o /' \
59 -e '/hs$$$$/ s/^/$$$$(eval $$$$(call hi-rule,/' \
60 -e '/hs$$$$/ s/$$$$/))/' \
61 -e '/hs-boot$$$$/ p' -e '/hs-boot$$$$/ s/o-boot /hi-boot /g' \
62 -e '/hs-boot$$$$/ s/:/ : %hi-boot: %o-boot /' \
63 -e '/hs-boot$$$$/ s/^/$$$$(eval $$$$(call hi-rule,/' \
64 -e '/hs-boot$$$$/ s/$$$$/))/' \
65 $$@.tmp2 > $$@
66 # Some of the C files (directly or indirectly) include the generated
67 # includes files.
68 $$($1_$2_depfile_c_asm) : $$(includes_H_CONFIG) $$(includes_H_PLATFORM)
69
70 $$($1_$2_depfile_c_asm) : $$($1_$2_C_FILES_DEPS) $$($1_$2_S_FILES) $$($1_$2_CMM_FILES) | $$$$(dir $$$$@)/.
71 $$(call removeFiles,$$@.tmp)
72 ifneq "$$(strip $$($1_$2_C_FILES_DEPS) $$($1_$2_S_FILES)) $$($1_$2_CMM_FILES))" ""
73 # We ought to actually do this for each way in $$($1_$2_WAYS), but then
74 # it takes a long time to make the C deps for the RTS (30 seconds rather
75 # than 3), so instead we just pass the list of ways in and let addCFileDeps
76 # copy the deps for each way on the assumption that they are the same
77 $$(foreach f,$$($1_$2_C_FILES_DEPS) $$($1_$2_S_FILES) $$($1_$2_CMM_FILES), \
78 $$(call addCFileDeps,$1,$2,$$($1_$2_depfile_c_asm),$$f,$$($1_$2_WAYS)))
79 $$(call removeFiles,$$@.bit)
80 endif
81 echo "$1_$2_depfile_c_asm_EXISTS = YES" >> $$@.tmp
82 mv $$@.tmp $$@
83
84 endif # NO_GENERATED_MAKEFILE_RULES
85
86 # Note sed magic above: mkdependC can't do -odir stuff, so we have to
87 # munge the dependencies it generates to refer to the correct targets.
88
89 $(call profEnd, build-dependencies($1,$2,$3))
90 endef
91
92 # This comment is outside the "define addCFileDeps" as that definition
93 # is a list of command lines, and if it is inside it then we pass this
94 # comment to the shell every time we call the definition.
95 # $1 = dir
96 # $2 = distdir
97 # $3 = depfile
98 # $4 = file
99 # $5 = ways
100 #
101 # The formatting of this definition (e.g. the blank line above) is
102 # important, in order to get make to generate the right makefile code.
103 #
104 # 's|\\|/|g'
105 # We first normalise all slashes to be forward slashes. Note that
106 # $(TOP) also uses forward slashes.
107 # 's| /$$| \\|'
108 # But now we need to fix the line continuation characters that we
109 # just broke.
110 # "1s|\.o|\.$($w_osuf)|"
111 # We will have dependencies for .o files, so we need to fix them up
112 # for the right object suffix for the way we're doing
113 # "1s|^|$(dir $4)|"
114 # We always get deps for just foo.o when the file we're making is
115 # a/b/c/foo.o, so we need to prepend the directory of the source file
116 # "1s|$1/|$1/$2/build/|"
117 # Well, almost. We actually need to insert e.g. "dist/build" in the
118 # middle of that directory
119 # "1s|$2/build/$2/build|$2/build|g"
120 # But some source files, e.g. sm/Evac_thr.c, are also inside the
121 # "dist/build" directory, so now we've just made
122 # "dist/build/dist/build", so we need to remove the duplication
123 # again
124 # "s|$(TOP)/||g$(CASE_INSENSITIVE_SED)"
125 # Finally, when making deps for packages like ghc stage2, we have
126 # some include paths for packages registered in the in-tree package
127 # database. These include paths are full (i.e. not relative) paths,
128 # which means that the "cpp -MM" output uses full paths in some cases.
129 # This causes 2 problems:
130 # * they don't match up with the rules to rebuild the files, where
131 # appropriate.
132 # * on Windows, make interprets the colon in c:/foo/bar.h as make
133 # syntax.
134 # So we sed off $(TOP). Unfortunately, on Windows, the case for the
135 # drive letter is sometimes different in what $(TOP) starts with, and
136 # what the path in the package database starts with. We therefore
137 # need to do the substitution case-insensitively on Windows. But
138 # the s///i modifier isn't portable, so we set CASE_INSENSITIVE_SED
139 # to "i" on Windows and "" on any other platform.
140
141 # We use this not only for .c files, but also for .S and .cmm files.
142 # As gcc doesn't know what a .cmm file is, it treats it as a linker
143 # input and ignores it. We therefore tell gcc that all files are C
144 # files with "-x c" so that it actually processes them all.
145
146 define addCFileDeps
147
148 $(CPP) $($1_$2_MKDEPENDC_OPTS) $($1_$2_$(firstword $($1_$2_WAYS))_ALL_CC_OPTS) $($(basename $4)_CC_OPTS) -MM -x c $4 -MF $3.bit
149 $(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 >> $3.tmp &&) true
150 endef
151
152 ifeq "$(Windows_Host)" "YES"
153 CASE_INSENSITIVE_SED = i
154 else
155 CASE_INSENSITIVE_SED =
156 endif
157