# -----------------------------------------------------------------------------
#
# (c) 2009 The University of Glasgow
#
# This file is part of the GHC build system.
#
# To understand how the build system works and how to modify it, see
#      http://ghc.haskell.org/trac/ghc/wiki/Building/Architecture
#      http://ghc.haskell.org/trac/ghc/wiki/Building/Modifying
#
# -----------------------------------------------------------------------------


define build-package-way # $1 = dir, $2 = distdir, $3 = way, $4 = stage
$(call trace, build-package-way($1,$2,$3))
$(call profStart, build-package-way($1,$2,$3))

$(call distdir-way-opts,$1,$2,$3,$4)
$(call hs-suffix-way-rules,$1,$2,$3)

$(call hs-objs,$1,$2,$3)

# The .a/.so library file, indexed by two different sets of vars:
# the first is indexed by the dir, distdir and way
# the second is indexed by the package id, distdir and way
$1_$2_$3_LIB_FILE = libHS$$($1_$2_COMPONENT_ID)$$($3_libsuf)
$1_$2_$3_LIB = $1/$2/build/$$($1_$2_$3_LIB_FILE)
$$($1_$2_COMPONENT_ID)_$2_$3_LIB = $$($1_$2_$3_LIB)

ifeq "$$(HostOS_CPP)" "mingw32"
ifneq "$$($1_$2_dll0_HS_OBJS)" ""
$1_$2_$3_LIB0_ROOT = HS$$($1_$2_COMPONENT_ID)-0$$($3_libsuf)
$1_$2_$3_LIB0_NAME = lib$$($1_$2_$3_LIB0_ROOT)
$1_$2_$3_LIB0 = $1/$2/build/$$($1_$2_$3_LIB0_NAME)
endif
endif

# Note [inconsistent distdirs]
#
# hack: the DEPS_LIBS mechanism assumes that the distdirs for packages
# that depend on each other are the same, but that is not the case for
# ghc where we use stage1/stage2 rather than dist/dist-install.
# Really we should use a consistent scheme for distdirs, but in the
# meantime we work around it by defining ghc-<ver>_dist-install_way_LIB:
#
# A similar hack is applied to the PROGRAM_DEP_LIB mechanism in
# rules/build-package.mk.
ifeq "$$($1_PACKAGE) $2" "ghc stage2"
$$($1_$2_COMPONENT_ID)_dist-install_$3_LIB = $$($1_$2_$3_LIB)
endif

# All the .a/.so library file dependencies for this library.
#
# The $(subst stage2,dist-install,..) is needed due to Note
# [inconsistent distdirs].
#
# NB: Use DEP_COMPONENT_IDS for the /directory/ parameter.
$1_$2_$3_DEPS_LIBS=$$(foreach dep,$$($1_$2_DEP_COMPONENT_IDS),$$($$(dep)_$(subst stage2,dist-install,$2)_$3_LIB))

$1_$2_$3_NON_HS_OBJS = $$($1_$2_$3_CMM_OBJS) $$($1_$2_$3_C_OBJS)  $$($1_$2_$3_S_OBJS) $$($1_$2_EXTRA_OBJS)
$1_$2_$3_ALL_OBJS = $$($1_$2_$3_HS_OBJS) $$($1_$2_$3_NON_HS_OBJS)

ifeq "$3" "dyn"

ifneq "$$($1_$2_dll0_MODULES)" ""
$$($1_$2_$3_LIB)  : $1/$2/dll-split.stamp
ifneq "$$($1_$2_$3_LIB0)" ""
$$($1_$2_$3_LIB0) : $1/$2/dll-split.stamp
endif
endif

$1/$2/dll-split.stamp: $$($1_$2_depfile_haskell) $$$$(dll-split_INPLACE)
	$$(dll-split_INPLACE) $$< "$$($1_$2_dll0_START_MODULE)" "$$($1_$2_dll0_MODULES)"
	touch $$@

# Link a dynamic library
# On windows we have to supply the extra libs this one links to when building it.
ifeq "$$(HostOS_CPP)" "mingw32"
$$($1_$2_$3_LIB) : $$($1_$2_$3_ALL_OBJS) $$(ALL_RTS_LIBS) $$($1_$2_$3_DEPS_LIBS)
ifneq "$$($1_$2_$3_LIB0)" ""
	$$(call build-dll,$1,$2,$3,-L$1/$2/build -l$$($1_$2_$3_LIB0_ROOT),$$(filter-out $$($1_$2_dll0_HS_OBJS),$$($1_$2_$3_HS_OBJS)) $$($1_$2_$3_NON_HS_OBJS),$$@)
else
	$$(call build-dll,$1,$2,$3,,$$($1_$2_$3_HS_OBJS) $$($1_$2_$3_NON_HS_OBJS),$$@)
endif

ifneq "$$($1_$2_$3_LIB0)" ""
$$($1_$2_$3_LIB) : $$($1_$2_$3_LIB0)
$$($1_$2_$3_LIB0) : $$($1_$2_$3_ALL_OBJS) $$(ALL_RTS_LIBS) $$($1_$2_$3_DEPS_LIBS)
	$$(call build-dll,$1,$2,$3,,$$($1_$2_dll0_HS_OBJS) $$($1_$2_$3_NON_HS_OBJS),$$($1_$2_$3_LIB0))
endif

else # ifneq "$$(HostOS_CPP)" "mingw32"
$$($1_$2_$3_LIB) : $$($1_$2_$3_ALL_OBJS) $$(ALL_RTS_LIBS) $$($1_$2_$3_DEPS_LIBS)
	$$(call cmd,$1_$2_HC) $$($1_$2_$3_ALL_HC_OPTS) $$($1_$2_$3_GHC_LD_OPTS) $$($1_$2_$3_ALL_OBJS) \
         -shared -dynamic -dynload deploy \
	 $$(addprefix -l,$$($1_$2_EXTRA_LIBRARIES)) $$(addprefix -L,$$($1_$2_EXTRA_LIBDIRS)) \
         -no-auto-link-packages \
         -o $$@
endif # "$$(HostOS_CPP)" "mingw32"

else # ifneq "$3" "dyn"

# Build the ordinary .a library
$$($1_$2_$3_LIB) : $$($1_$2_$3_ALL_OBJS)
	$$(call removeFiles,$$@ $$@.contents)
ifeq "$$($1_$2_SplitObjs)" "YES"
	$$(FIND) $$(patsubst %.$$($3_osuf),%_$$($3_osuf)_split,$$($1_$2_$3_HS_OBJS)) -name '*.$$($3_osuf)' -print >> $$@.contents
	echo $$($1_$2_$3_NON_HS_OBJS) >> $$@.contents
else
	echo $$($1_$2_$3_ALL_OBJS) >> $$@.contents
endif
ifeq "$$($1_$2_ArSupportsAtFile)" "YES"
	$$(call cmd,$1_$2_AR) $$($1_$2_AR_OPTS) $$($1_$2_EXTRA_AR_ARGS) $$@ @$$@.contents
else
	"$$(XARGS)" $$(XARGS_OPTS) "$$($1_$2_AR)" $$($1_$2_AR_OPTS) $$($1_$2_EXTRA_AR_ARGS) $$@ < $$@.contents
endif
	$$(call removeFiles,$$@.contents)

ifeq "$$(HostOS_CPP)" "mingw32"
ifneq "$$($1_$2_$3_LIB0)" ""
$$($1_$2_$3_LIB) : $$($1_$2_$3_LIB0)
$$($1_$2_$3_LIB0) :
	$$(call cmd,$1_$2_AR) $$($1_$2_AR_OPTS) $$($1_$2_EXTRA_AR_ARGS) $$@
endif
endif

endif # "$3" "dyn"

$(call all-target,$1_$2,all_$1_$2_$3)
$(call all-target,$1_$2_$3,$$($1_$2_$3_LIB))

# Don't put bootstrapping packages in the bindist
ifneq "$4" "0"
BINDIST_HI += $$($1_$2_$3_HI)
BINDIST_LIBS += $$($1_$2_$3_LIB)
BINDIST_LIBS += $$($1_$2_$3_LIB0)
endif

ifeq "$$($1_$2_SplitSections)" "YES"
ifeq "$(LdIsGNULd)" "YES"
$1_$2_LD_SCRIPT = driver/utils/merge_sections.ld
endif
endif

# Build the GHCi library
ifeq "$$(DYNAMIC_GHC_PROGRAMS)" "YES"
$1_$2_GHCI_LIB = $$($1_$2_dyn_LIB)
else
ifeq "$3" "v"
$1_$2_GHCI_LIB = $1/$2/build/HS$$($1_$2_COMPONENT_ID).$$($3_osuf)
ifeq "$$($1_$2_BUILD_GHCI_LIB)" "YES"
# Don't put bootstrapping packages in the bindist
ifneq "$4" "0"
BINDIST_LIBS += $$($1_$2_GHCI_LIB)
endif
endif
$$($1_$2_GHCI_LIB) : $$($1_$2_$3_HS_OBJS) $$($1_$2_$3_CMM_OBJS) $$($1_$2_$3_C_OBJS) $$($1_$2_$3_S_OBJS) $$($1_$2_EXTRA_OBJS) $$($1_$2_LD_SCRIPT)
	$$(call cmd,LD) $$(CONF_LD_LINKER_OPTS_STAGE$4) -r $$(if $$($1_$2_LD_SCRIPT),-T $$($1_$2_LD_SCRIPT)) -o $$@ $$(EXTRA_LD_LINKER_OPTS) $$($1_$2_$3_HS_OBJS) $$($1_$2_$3_CMM_OBJS) $$($1_$2_$3_C_OBJS) $$($1_$2_$3_S_OBJS) $$($1_$2_EXTRA_OBJS)

ifeq "$$($1_$2_BUILD_GHCI_LIB)" "YES"
# Don't bother making ghci libs for bootstrapping packages
ifneq "$4" "0"
$(call all-target,$1_$2,$$($1_$2_GHCI_LIB))
endif
endif # "$$($1_$2_BUILD_GHCI_LIB)" "YES"
endif # "$3" "v"
endif # "$$(DYNAMIC_GHC_PROGRAMS)" "YES"

$(call profEnd, build-package-way($1,$2,$3))
endef # build-package-way

# $1 = dir
# $2 = distdir
# $3 = way
# $4 = extra flags
# $5 = object files to link
# $6 = output filename
define build-dll
	$(call cmd,$1_$2_HC) $($1_$2_$3_ALL_HC_OPTS) $($1_$2_$3_GHC_LD_OPTS) $4 $5 \
	    -shared -dynamic -dynload deploy \
	    $(addprefix -l,$($1_$2_EXTRA_LIBRARIES)) \
	    -no-auto-link-packages \
	    -o $6
# Now check that the DLL doesn't have too many symbols. See trac #5987.
	SYMBOLS=`$(OBJDUMP) -p $6 | sed -n "1,/^.Ordinal\/Name Pointer/ D; p; /^$$/ q" | tail -n +2 | wc -l`; echo "Number of symbols in $6: $$SYMBOLS"
	case `$(OBJDUMP) -p $6 | sed -n "1,/^.Ordinal\/Name Pointer/ D; p; /^$$/ q" | grep "\[ *0\]" | wc -l` in 1) echo DLL $6 OK;; 0) echo No symbols in DLL $6; exit 1;; [0-9]*) echo Too many symbols in DLL $6; $(OBJDUMP) -p $6 | sed -n "1,/^.Ordinal\/Name Pointer/ D; p; /^$$/ q" | tail; exit 1;; *) echo bad DLL $6; exit 1;; esac
endef