hadrian: eliminate most of the remaining big rule enumerations
[ghc.git] / rts / ghc.mk
index 30f6c08..ff3f18f 100644 (file)
@@ -5,8 +5,8 @@
 # This file is part of the GHC build system.
 #
 # To understand how the build system works and how to modify it, see
-#      http://hackage.haskell.org/trac/ghc/wiki/Building/Architecture
-#      http://hackage.haskell.org/trac/ghc/wiki/Building/Modifying
+#      http://ghc.haskell.org/trac/ghc/wiki/Building/Architecture
+#      http://ghc.haskell.org/trac/ghc/wiki/Building/Modifying
 #
 # -----------------------------------------------------------------------------
 
@@ -19,6 +19,14 @@ rts_dist_HC = $(GHC_STAGE1)
 rts_INSTALL_INFO = rts
 rts_VERSION = 1.0
 
+# Minimum supported Windows version.
+# These numbers can be found at:
+#  https://msdn.microsoft.com/en-us/library/windows/desktop/aa383745(v=vs.85).aspx
+# If we're compiling on windows, enforce that we only support Vista SP1+
+# Adding this here means it doesn't have to be done in individual .c files
+# and also centralizes the versioning.
+rts_WINVER = 0x06000100
+
 # merge GhcLibWays and GhcRTSWays but strip out duplicates
 rts_WAYS = $(GhcLibWays) $(filter-out $(GhcLibWays),$(GhcRTSWays))
 rts_dist_WAYS = $(rts_WAYS)
@@ -29,15 +37,16 @@ $(eval $(call all-target,rts,$(ALL_RTS_LIBS)))
 # -----------------------------------------------------------------------------
 # Defining the sources
 
-ALL_DIRS = hooks sm eventlog
+ALL_DIRS = hooks sm eventlog linker
 
-ifeq "$(HostOS_CPP)" "mingw32"
+ifeq "$(TargetOS_CPP)" "mingw32"
 ALL_DIRS += win32
 else
 ALL_DIRS += posix
 endif
 
 rts_C_SRCS := $(wildcard rts/*.c $(foreach dir,$(ALL_DIRS),rts/$(dir)/*.c))
+rts_C_HOOK_SRCS := $(wildcard rts/hooks/*.c)
 rts_CMM_SRCS := $(wildcard rts/*.cmm)
 
 # Don't compile .S files when bootstrapping a new arch
@@ -45,6 +54,13 @@ ifneq "$(PORTING_HOST)" "YES"
 ifneq "$(findstring $(TargetArch_CPP), i386 powerpc powerpc64)" ""
 rts_S_SRCS += rts/AdjustorAsm.S
 endif
+# this matches substrings of powerpc64le, including "powerpc" and "powerpc64"
+ifneq "$(findstring $(TargetArch_CPP), powerpc64le)" ""
+# unregisterised builds use the mini interpreter
+ifneq "$(GhcUnregisterised)" "YES"
+rts_S_SRCS += rts/StgCRunAsm.S
+endif
+endif
 endif
 
 ifeq "$(GhcUnregisterised)" "YES"
@@ -56,10 +72,6 @@ rts_AUTO_APPLY_CMM = rts/dist/build/AutoApply.cmm
 $(rts_AUTO_APPLY_CMM): $$(genapply_INPLACE)
        "$(genapply_INPLACE)" >$@
 
-rts/dist/build/sm/Evac_thr.c : rts/sm/Evac.c | $$(dir $$@)/.
-       cp $< $@
-rts/dist/build/sm/Scav_thr.c : rts/sm/Scav.c | $$(dir $$@)/.
-       cp $< $@
 
 rts_H_FILES := $(wildcard rts/*.h rts/*/*.h)
 
@@ -71,7 +83,7 @@ endif
 # collect the -l and -L flags that we need to link the rts dyn lib.
 # Note that, as sed on OS X doesn't handle \+, we use [^ ][^ ]* rather
 # than [^ ]\+
-rts/libs.depend : $$(ghc-pkg_INPLACE)
+rts/dist/libs.depend : $$(ghc-pkg_INPLACE) | $$(dir $$@)/.
        "$(ghc-pkg_INPLACE)" --simple-output field rts extra-libraries \
          | sed -e 's/\([^ ][^ ]*\)/-l\1/g' > $@
        "$(ghc-pkg_INPLACE)" --simple-output field rts library-dirs \
@@ -84,7 +96,7 @@ rts/libs.depend : $$(ghc-pkg_INPLACE)
 #      These are made from rts/win32/libHS*.def which contain lists of
 #      all the symbols in those libraries used by the RTS.
 #
-ifeq "$(HostOS_CPP)" "mingw32" 
+ifeq "$(TargetOS_CPP)" "mingw32"
 
 ALL_RTS_DEF_LIBNAMES   = base ghc-prim
 ALL_RTS_DEF_LIBS       = \
@@ -108,7 +120,7 @@ endif
 
 ifneq "$(BINDIST)" "YES"
 ifneq "$(UseSystemLibFFI)" "YES"
-ifeq "$(HostOS_CPP)" "mingw32" 
+ifeq "$(TargetOS_CPP)" "mingw32"
 rts/dist/build/$(LIBFFI_DLL): libffi/build/inst/bin/$(LIBFFI_DLL)
        cp $< $@
 else
@@ -116,10 +128,20 @@ else
 # depend on libffi.so, but copy libffi.so*
 rts/dist/build/lib$(LIBFFI_NAME)$(soext): libffi/build/inst/lib/lib$(LIBFFI_NAME)$(soext)
        cp libffi/build/inst/lib/lib$(LIBFFI_NAME)$(soext)* rts/dist/build
+ifeq "$(TargetOS_CPP)" "darwin"
+       install_name_tool -id @rpath/lib$(LIBFFI_NAME)$(soext) rts/dist/build/lib$(LIBFFI_NAME)$(soext)
+endif
 endif
 endif
 endif
 
+
+ifeq "$(USE_DTRACE)" "YES"
+ifneq "$(findstring $(TargetOS_CPP), linux solaris2 freebsd)" ""
+NEED_DTRACE_PROBES_OBJ = YES
+endif
+endif
+
 #-----------------------------------------------------------------------------
 # Building one way
 define build-rts-way # args: $1 = way
@@ -132,40 +154,42 @@ rts_dist_$1_CC_OPTS := $$(GhcRtsCcOpts)
 # The per-way CC_OPTS
 ifneq "$$(findstring debug, $1)" ""
 rts_dist_$1_HC_OPTS += -O0
-rts_dist_$1_CC_OPTS += -fno-omit-frame-pointer -g -O0
+rts_dist_$1_CC_OPTS += -fno-omit-frame-pointer -O0 -g3
+# Useful to ensure that inline functions can be called within GDB but not
+# supported by clang
+#rts_dist_$1_CC_OPTS += -fkeep-inline-functions
 endif
 
 ifneq "$$(findstring dyn, $1)" ""
-ifeq "$$(HostOS_CPP)" "mingw32" 
+ifeq "$$(TargetOS_CPP)" "mingw32"
 rts_dist_$1_CC_OPTS += -DCOMPILING_WINDOWS_DLL
 endif
+rts_dist_$1_CC_OPTS += -DDYNAMIC
 endif
 
-ifneq "$$(findstring thr, $1)" ""
-rts_$1_EXTRA_C_SRCS  =  rts/dist/build/sm/Evac_thr.c rts/dist/build/sm/Scav_thr.c
-endif
 
-$(call distdir-way-opts,rts,dist,$1)
+$(call distdir-way-opts,rts,dist,$1,1) # 1 because the rts is built with stage1
 $(call c-suffix-rules,rts,dist,$1,YES)
 $(call cmm-suffix-rules,rts,dist,$1)
 
-rts_$1_LIB_NAME = libHSrts$$($1_libsuf)
-rts_$1_LIB = rts/dist/build/$$(rts_$1_LIB_NAME)
+rts_$1_LIB_FILE = libHSrts$$($1_libsuf)
+rts_$1_LIB = rts/dist/build/$$(rts_$1_LIB_FILE)
 
-rts_$1_C_OBJS   = $$(patsubst rts/%.c,rts/dist/build/%.$$($1_osuf),$$(rts_C_SRCS)) $$(patsubst %.c,%.$$($1_osuf),$$(rts_$1_EXTRA_C_SRCS))
-rts_$1_S_OBJS   = $$(patsubst rts/%.S,rts/dist/build/%.$$($1_osuf),$$(rts_S_SRCS))
-rts_$1_CMM_OBJS = $$(patsubst rts/%.cmm,rts/dist/build/%.$$($1_osuf),$$(rts_CMM_SRCS)) $$(patsubst %.cmm,%.$$($1_osuf),$$(rts_AUTO_APPLY_CMM))
+rts_$1_C_OBJS      = $$(patsubst rts/%.c,rts/dist/build/%.$$($1_osuf),$$(rts_C_SRCS)) $$(patsubst %.c,%.$$($1_osuf),$$(rts_$1_EXTRA_C_SRCS))
+rts_$1_C_HOOK_OBJS = $$(patsubst rts/hooks/%.c,rts/dist/build/hooks/%.$$($1_osuf),$$(rts_C_HOOK_SRCS))
+rts_$1_S_OBJS      = $$(patsubst rts/%.S,rts/dist/build/%.$$($1_osuf),$$(rts_S_SRCS))
+rts_$1_CMM_OBJS    = $$(patsubst rts/%.cmm,rts/dist/build/%.$$($1_osuf),$$(rts_CMM_SRCS)) $$(patsubst %.cmm,%.$$($1_osuf),$$(rts_AUTO_APPLY_CMM))
 
 rts_$1_OBJS = $$(rts_$1_C_OBJS) $$(rts_$1_S_OBJS) $$(rts_$1_CMM_OBJS)
 
 ifeq "$(USE_DTRACE)" "YES"
-ifeq "$(TargetOS_CPP)" "solaris2"
+ifeq "$(NEED_DTRACE_PROBES_OBJ)" "YES"
 # On Darwin we don't need to generate binary containing probes defined
 # in DTrace script, but DTrace on Solaris expects generation of binary
 # from the DTrace probes definitions
 rts_$1_DTRACE_OBJS = rts/dist/build/RtsProbes.$$($1_osuf)
 
-rts/dist/build/RtsProbes.$$($1_osuf) : $$(rts_$1_OBJS)
+$$(rts_$1_DTRACE_OBJS) : $$(rts_$1_OBJS)
        $(DTRACE) -G -C $$(addprefix -I,$$(GHC_INCLUDE_DIRS)) -DDTRACE -s rts/RtsProbes.d -o \
                $$@ $$(rts_$1_OBJS)
 endif
@@ -173,6 +197,13 @@ endif
 
 rts_dist_$1_CC_OPTS += -DRtsWay=\"rts_$1\"
 
+# If we're compiling on windows, enforce that we only support XP+
+# Adding this here means it doesn't have to be done in individual .c files
+# and also centralizes the versioning.
+ifeq "$$(TargetOS_CPP)" "mingw32"
+rts_dist_$1_CC_OPTS += -DWINVER=$(rts_WINVER)
+endif
+
 ifneq "$$(UseSystemLibFFI)" "YES"
 rts_dist_FFI_SO = rts/dist/build/lib$$(LIBFFI_NAME)$$(soext)
 else
@@ -181,33 +212,94 @@ endif
 
 # Making a shared library for the RTS.
 ifneq "$$(findstring dyn, $1)" ""
-ifeq "$$(HostOS_CPP)" "mingw32" 
-$$(rts_$1_LIB) : $$(rts_$1_OBJS) $$(ALL_RTS_DEF_LIBS) rts/libs.depend rts/dist/build/$$(LIBFFI_DLL)
+ifeq "$$(TargetOS_CPP)" "mingw32"
+$$(rts_$1_LIB) : $$(rts_$1_OBJS) $$(ALL_RTS_DEF_LIBS) rts/dist/libs.depend rts/dist/build/$$(LIBFFI_DLL)
        "$$(RM)" $$(RM_OPTS) $$@
-       "$$(rts_dist_HC)" -package-name rts -shared -dynamic -dynload deploy \
-         -no-auto-link-packages -Lrts/dist/build -l$$(LIBFFI_NAME) \
-         `cat rts/libs.depend` $$(rts_$1_OBJS) $$(ALL_RTS_DEF_LIBS) -o $$@
+       # Call out to the shell script to decide how to build the dll.
+       # Making a shared library for the RTS.
+       # $$1  = dir
+       # $$2  = distdir
+       # $$3  = way
+       # $$4  = extra flags
+       # $$5  = extra libraries to link
+       # $$6  = object files to link
+       # $$7  = output filename
+       # $$8  = link command
+       # $$9  = create delay load import lib
+       # $$10 = SxS Name
+       # $$11 = SxS Version
+       $$(gen-dll_INPLACE) link "rts/dist/build" "rts/dist/build" "" "" "$$(ALL_RTS_DEF_LIBS)" "$$(rts_$1_OBJS)" "$$@" "$$(rts_dist_HC) -this-unit-id rts -no-hs-main -shared -dynamic -dynload deploy \
+         -no-auto-link-packages -Lrts/dist/build -l$$(LIBFFI_NAME) \
+         `cat rts/dist/libs.depend | tr '\n' ' '` \
+         $$(rts_dist_$1_GHC_LD_OPTS)" "NO" \
+         "$(rts_INSTALL_INFO)-$(subst dyn,,$(subst _dyn,,$(subst v,,$1)))" "$(ProjectVersion)"
+
 else
 ifneq "$$(UseSystemLibFFI)" "YES"
 LIBFFI_LIBS = -Lrts/dist/build -l$$(LIBFFI_NAME)
 ifeq "$$(TargetElf)" "YES"
-LIBFFI_LIBS += -optl-Wl,-rpath -optl-Wl,'$$$$ORIGIN' -optl-Wl,-z -optl-Wl,origin
+LIBFFI_LIBS += -optl-Wl,-rpath -optl-Wl,'$$$$ORIGIN' -optl-Wl,-zorigin
+endif
+ifeq "$(TargetOS_CPP)" "darwin"
+LIBFFI_LIBS += -optl-Wl,-rpath -optl-Wl,@loader_path
 endif
 
 else
-# flags will be taken care of in rts/libs.depend
+# flags will be taken care of in rts/dist/libs.depend
 LIBFFI_LIBS =
 endif
-$$(rts_$1_LIB) : $$(rts_$1_OBJS) $$(rts_$1_DTRACE_OBJS) rts/libs.depend $$(rts_dist_FFI_SO)
+$$(rts_$1_LIB) : $$(rts_$1_OBJS) $$(rts_$1_DTRACE_OBJS) rts/dist/libs.depend $$(rts_dist_FFI_SO)
        "$$(RM)" $$(RM_OPTS) $$@
-       "$$(rts_dist_HC)" -package-name rts -shared -dynamic -dynload deploy \
-         -no-auto-link-packages $$(LIBFFI_LIBS) `cat rts/libs.depend` $$(rts_$1_OBJS) \
+       "$$(rts_dist_HC)" -this-unit-id rts -shared -dynamic -dynload deploy \
+         -no-auto-link-packages $$(LIBFFI_LIBS) `cat rts/dist/libs.depend` $$(rts_$1_OBJS) \
+          $$(rts_dist_$1_GHC_LD_OPTS) \
          $$(rts_$1_DTRACE_OBJS) -o $$@
 endif
 else
-$$(rts_$1_LIB) : $$(rts_$1_OBJS) $$(rts_$1_DTRACE_OBJS)
+
+ifeq "$(USE_DTRACE)" "YES"
+ifeq "$(NEED_DTRACE_PROBES_OBJ)" "YES"
+# A list of objects that do not get included in the RTS object that is created
+# during the linking step. To prevent future linking errors, especially when
+# using the compiler as a bootstrap compiler, we need to exclude the hook
+# objects from being re-linked into the single LINKED_OBJS object file. When the
+# hooks are being linked into the RTS object this will result in duplicated
+# symbols causing the linker to fail (e.g. `StackOverflowHook` in RTS.o and
+# hschooks.o). The excluded objects do not get relinked into the RTS object but
+# get included separately so prevent linker errors.
+# (see issue #15040)
+rts_$1_EXCLUDED_OBJS = $$(rts_$1_C_HOOK_OBJS)
+# The RTS object that gets generated to package up all of the runtime system
+# with the dtrace probe code.
+rts_$1_LINKED_OBJS = rts/dist/build/RTS.$$($1_osuf)
+
+$$(rts_$1_LINKED_OBJS) : $$(rts_$1_OBJS) $$(rts_$1_DTRACE_OBJS) $$(rts_$1_C_HOOK_OBJS)
+       "$$(RM)" $$(RM_OPTS) $$@
+
+       # When linking an archive the linker will only include the object files that
+       # are actually needed during linking. It therefore does not include the dtrace
+       # specific code for initializing the probes. By creating a single object that
+       # also includes the probe object code we force the linker to include the
+       # probes when linking the static runtime.
+       #
+       # The reason why we are re-linking all the objects into a single object file
+       # is stated in this thread:
+       # https://thr3ads.net/dtrace-discuss/2005/08/384778-Problem-with-probes-defined-in-static-libraries
+       $(LD) -r -o $$(rts_$1_LINKED_OBJS) $$(rts_$1_DTRACE_OBJS) $$(filter-out $$(rts_$1_EXCLUDED_OBJS), $$(rts_$1_OBJS))
+else
+rts_$1_EXCLUDED_OBJS =
+rts_$1_LINKED_OBJS = $$(rts_$1_OBJS)
+endif
+else
+rts_$1_EXCLUDED_OBJS =
+rts_$1_LINKED_OBJS = $$(rts_$1_OBJS)
+endif
+
+
+$$(rts_$1_LIB) : $$(rts_$1_LINKED_OBJS)
        "$$(RM)" $$(RM_OPTS) $$@
-       echo $$(rts_$1_OBJS) $$(rts_$1_DTRACE_OBJS) | "$$(XARGS)" $$(XARGS_OPTS) "$$(AR_STAGE1)" \
+
+       echo $$(rts_$1_LINKED_OBJS) $$(rts_$1_EXCLUDED_OBJS) | "$$(XARGS)" $$(XARGS_OPTS) "$$(AR_STAGE1)" \
                $$(AR_OPTS_STAGE1) $$(EXTRA_AR_ARGS_STAGE1) $$@
 
 ifneq "$$(UseSystemLibFFI)" "YES"
@@ -232,20 +324,18 @@ $(eval $(call distdir-opts,rts,dist,1))
 
 # We like plenty of warnings.
 WARNING_OPTS += -Wall
-ifeq "$(GccLT34)" "YES"
-WARNING_OPTS += -W
-else
 WARNING_OPTS += -Wextra
-endif
 WARNING_OPTS += -Wstrict-prototypes 
 WARNING_OPTS += -Wmissing-prototypes 
 WARNING_OPTS += -Wmissing-declarations
 WARNING_OPTS += -Winline
-WARNING_OPTS += -Waggregate-return
 WARNING_OPTS += -Wpointer-arith
 WARNING_OPTS += -Wmissing-noreturn
 WARNING_OPTS += -Wnested-externs
-WARNING_OPTS += -Wredundant-decls 
+WARNING_OPTS += -Wredundant-decls
+ifeq "$(GccLT46)" "NO"
+WARNING_OPTS += -Wundef
+endif
 
 # These ones are hard to avoid:
 #WARNING_OPTS += -Wconversion
@@ -264,7 +354,7 @@ WARNING_OPTS += -Wredundant-decls
 
 STANDARD_OPTS += $(addprefix -I,$(GHC_INCLUDE_DIRS)) -Irts -Irts/dist/build
 # COMPILING_RTS is only used when building Win32 DLL support.
-STANDARD_OPTS += -DCOMPILING_RTS
+STANDARD_OPTS += -DCOMPILING_RTS -DFS_NAMESPACE=rts
 
 # HC_OPTS is included in both .c and .cmm compilations, whereas CC_OPTS is
 # only included in .c compilations.  HC_OPTS included the WAY_* opts, which
@@ -273,7 +363,7 @@ STANDARD_OPTS += -DCOMPILING_RTS
 rts_CC_OPTS += $(WARNING_OPTS)
 rts_CC_OPTS += $(STANDARD_OPTS)
 
-rts_HC_OPTS += $(STANDARD_OPTS) -package-name rts
+rts_HC_OPTS += $(STANDARD_OPTS) -this-unit-id rts
 
 ifneq "$(GhcWithSMP)" "YES"
 rts_CC_OPTS += -DNOSMP
@@ -292,7 +382,7 @@ rts_HC_OPTS += -dcmm-lint
 # StgClosure, StgMVar, etc.), and without -fno-strict-aliasing gcc is
 # allowed to assume that these pointers do not alias.  eg. without
 # this flag we get problems in sm/Evac.c:copy() with gcc 3.4.3, the
-# upd_evacee() assigments get moved before the object copy.
+# upd_evacuee() assignments get moved before the object copy.
 rts_CC_OPTS += -fno-strict-aliasing
 
 rts_CC_OPTS += -fno-common
@@ -301,15 +391,13 @@ ifeq "$(BeConservative)" "YES"
 rts_CC_OPTS += -DBE_CONSERVATIVE
 endif
 
+# Set Windows version
+ifeq "$$(TargetOS_CPP)" "mingw32"
+rts_CC_OPTS += -DWINVER=$(rts_WINVER)
+endif
+
 #-----------------------------------------------------------------------------
 # Flags for compiling specific files
-
-# If RtsMain.c is built with optimisation then the SEH exception stuff on
-# Windows gets confused.
-# This has to be in HC rather than CC opts, as otherwise there's a
-# -optc-O2 that comes after it.
-rts/RtsMain_HC_OPTS += -optc-O0
-
 rts/RtsMessages_CC_OPTS += -DProjectVersion=\"$(ProjectVersion)\"
 rts/RtsUtils_CC_OPTS += -DProjectVersion=\"$(ProjectVersion)\"
 rts/Trace_CC_OPTS += -DProjectVersion=\"$(ProjectVersion)\"
@@ -331,10 +419,8 @@ rts/RtsUtils_CC_OPTS += -DTargetVendor=\"$(TargetVendor_CPP)\"
 #
 rts/RtsUtils_CC_OPTS += -DGhcUnregisterised=\"$(GhcUnregisterised)\"
 rts/RtsUtils_CC_OPTS += -DGhcEnableTablesNextToCode=\"$(GhcEnableTablesNextToCode)\"
-
-ifeq "$(DYNAMIC_GHC_PROGRAMS)" "YES"
-rts/Linker_CC_OPTS += -DDYNAMIC_GHC_PROGRAMS
-endif
+#
+rts/xxhash_CC_OPTS += -O3 -ffast-math -ftree-vectorize
 
 # Compile various performance-critical pieces *without* -fPIC -dynamic
 # even when building a shared library.  If we don't do this, then the
@@ -395,15 +481,22 @@ endif
 endif
 
 # add CFLAGS for libffi
-# ffi.h triggers prototype warnings, so disable them here:
 ifeq "$(UseSystemLibFFI)" "YES"
 LIBFFI_CFLAGS = $(addprefix -I,$(FFIIncludeDir))
 else
 LIBFFI_CFLAGS =
 endif
+# ffi.h triggers prototype warnings, so disable them here:
 rts/Interpreter_CC_OPTS += -Wno-strict-prototypes $(LIBFFI_CFLAGS)
 rts/Adjustor_CC_OPTS    += -Wno-strict-prototypes $(LIBFFI_CFLAGS)
 rts/sm/Storage_CC_OPTS  += -Wno-strict-prototypes $(LIBFFI_CFLAGS)
+# ffi.h triggers undefined macro warnings on PowerPC, disable those:
+# this matches substrings of powerpc64le, including "powerpc" and "powerpc64"
+ifneq "$(findstring $(TargetArch_CPP), powerpc64le)" ""
+rts/Interpreter_CC_OPTS += -Wno-undef
+rts/Adjustor_CC_OPTS    += -Wno-undef
+rts/sm/Storage_CC_OPTS  += -Wno-undef
+endif
 
 # inlining warnings happen in Compact
 rts/sm/Compact_CC_OPTS += -Wno-inline
@@ -412,54 +505,24 @@ rts/sm/Compact_CC_OPTS += -Wno-inline
 rts/StgCRun_CC_OPTS += -w
 
 rts/RetainerProfile_CC_OPTS += -w
-rts/RetainerSet_CC_OPTS += -Wno-format
 # On Windows:
 rts/win32/ConsoleHandler_CC_OPTS += -w
 rts/win32/ThrIOManager_CC_OPTS += -w
-# The above warning supression flags are a temporary kludge.
+# The above warning suppression flags are a temporary kludge.
 # While working on this module you are encouraged to remove it and fix
 # any warnings in the module. See
-#     http://hackage.haskell.org/trac/ghc/wiki/WorkingConventions#Warnings
+#     http://ghc.haskell.org/trac/ghc/wiki/WorkingConventions#Warnings
 # for details
 
 # Without this, thread_obj will not be inlined (at least on x86 with GCC 4.1.0)
+ifneq "$(CC_CLANG_BACKEND)" "1"
 rts/sm/Compact_CC_OPTS += -finline-limit=2500
+endif
 
 # -O3 helps unroll some loops (especially in copy() with a constant argument).
 rts/sm/Evac_CC_OPTS += -funroll-loops
-rts/dist/build/sm/Evac_thr_HC_OPTS += -optc-funroll-loops
-
-# These files are just copies of sm/Evac.c and sm/Scav.c respectively,
-# but compiled with -DPARALLEL_GC.
-rts/dist/build/sm/Evac_thr_CC_OPTS += -DPARALLEL_GC -Irts/sm
-rts/dist/build/sm/Scav_thr_CC_OPTS += -DPARALLEL_GC -Irts/sm
-
-#-----------------------------------------------------------------------------
-# Add PAPI library if needed
-
-ifeq "$(GhcRtsWithPapi)" "YES"
-
-rts_CC_OPTS            += -DUSE_PAPI
+rts/sm/Evac_thr_HC_OPTS += -optc-funroll-loops
 
-rts_PACKAGE_CPP_OPTS   += -DUSE_PAPI
-rts_PACKAGE_CPP_OPTS    += -DPAPI_INCLUDE_DIR=$(PapiIncludeDir)
-rts_PACKAGE_CPP_OPTS    += -DPAPI_LIB_DIR=$(PapiLibDir)
-
-ifneq "$(PapiIncludeDir)" ""
-rts_HC_OPTS     += -I$(PapiIncludeDir)
-rts_CC_OPTS     += -I$(PapiIncludeDir)
-rts_HSC2HS_OPTS += -I$(PapiIncludeDir)
-endif
-ifneq "$(PapiLibDirs)" ""
-rts_LD_OPTS     += -L$(PapiLibDirs)
-endif
-
-else # GhcRtsWithPapi==YES
-
-rts_PACKAGE_CPP_OPTS += -DPAPI_INCLUDE_DIR=""
-rts_PACKAGE_CPP_OPTS += -DPAPI_LIB_DIR=""
-
-endif
 
 #-----------------------------------------------------------------------------
 # Use system provided libffi
@@ -528,7 +591,7 @@ ifeq "$(TargetOS_CPP)" "darwin"
 # Darwin has a flag to tell dtrace which cpp to use.
 # Unfortunately, this isn't supported on Solaris (See Solaris Dynamic Tracing
 # Guide, Chapter 16, for the configuration variables available on Solaris)
-DTRACE_FLAGS = -x cpppath=$(WhatGccIsCalled)
+DTRACE_FLAGS = -x cpppath=$(CC)
 endif
 
 DTRACEPROBES_SRC = rts/RtsProbes.d
@@ -567,8 +630,8 @@ endif
 
 .PHONY: install_libffi_headers
 install_libffi_headers :
-       $(call INSTALL_DIR,"$(DESTDIR)$(ghcheaderdir)")
-       $(call INSTALL_HEADER,$(INSTALL_OPTS),$(libffi_HEADERS),"$(DESTDIR)$(ghcheaderdir)/")
+       $(INSTALL_DIR) "$(DESTDIR)$(ghcheaderdir)"
+       $(INSTALL_HEADER) $(INSTALL_OPTS) $(libffi_HEADERS) "$(DESTDIR)$(ghcheaderdir)/"
 
 # -----------------------------------------------------------------------------
 # cleaning