Use different CC/LD options for different stages

aclocal.m4

@@ -4,6 +4,24 @@
 # ensure we don't clash with any pre-supplied autoconf ones.
 
 
+# FPTOOLS_SET_C_LD_FLAGS
+# ----------------------------------
+# Set the C and LD flags for a given platform
+AC_DEFUN([FPTOOLS_SET_C_LD_FLAGS],
+[
+    case $$1 in
+    i386-apple-darwin|powerpc-apple-darwin)
+        $2="$$2 -m32"
+        $3="$$3 -m32"
+        ;;
+    x86_64-apple-darwin)
+        $2="$$2 -m64"
+        $3="$$3 -m64"
+        ;;
+    esac
+])
+
+
 # FPTOOLS_FLOAT_WORD_ORDER_BIGENDIAN
 # ----------------------------------
 # Little endian Arm on Linux with some ABIs has big endian word order

configure.ac

@@ -313,20 +313,18 @@ case $host in
     ;;
 i386-apple-darwin|powerpc-apple-darwin)
     soext='.dylib'
-    CFLAGS="$CFLAGS -m32"
-    LDFLAGS="$LDFLAGS -m32"
-    CONF_CC_OPTS="$CONF_CC_OPTS -m32"
-    CONF_LD_OPTS="$CONF_LD_OPTS -m32"
     ;;
 x86_64-apple-darwin)
     soext='.dylib'
-    CFLAGS="$CFLAGS -m64"
-    LDFLAGS="$LDFLAGS -m64"
-    CONF_CC_OPTS="$CONF_CC_OPTS -m64"
-    CONF_LD_OPTS="$CONF_LD_OPTS -m64"
     ;;
 esac
 
+FPTOOLS_SET_C_LD_FLAGS([target],[CFLAGS],[LDFLAGS])
+FPTOOLS_SET_C_LD_FLAGS([build],[CONF_CC_OPTS_STAGE0],[CONF_LD_OPTS_STAGE0])
+FPTOOLS_SET_C_LD_FLAGS([target],[CONF_CC_OPTS_STAGE1],[CONF_LD_OPTS_STAGE1])
+# Stage 3 won't be supported by cross-compilation
+FPTOOLS_SET_C_LD_FLAGS([target],[CONF_CC_OPTS_STAGE2],[CONF_LD_OPTS_STAGE2])
+
 checkArch() {
     case $1 in
     alpha|arm|hppa|hppa1_1|i386|ia64|m68k|mips|mipseb|mipsel|powerpc|powerpc64|rs6000|s390|sparc|sparc64|vax|x86_64)
@@ -569,8 +567,12 @@ FP_GCC_EXTRA_FLAGS
 dnl ** figure out how to invoke cpp directly (gcc -E is no good)
 AC_PROG_CPP
 
-AC_SUBST(CONF_CC_OPTS)
-AC_SUBST(CONF_LD_OPTS)
+AC_SUBST(CONF_CC_OPTS_STAGE0)
+AC_SUBST(CONF_CC_OPTS_STAGE1)
+AC_SUBST(CONF_CC_OPTS_STAGE2)
+AC_SUBST(CONF_LD_OPTS_STAGE0)
+AC_SUBST(CONF_LD_OPTS_STAGE1)
+AC_SUBST(CONF_LD_OPTS_STAGE2)
 
 dnl ** figure out how to do context diffs
 FP_PROG_CONTEXT_DIFF

libffi/ghc.mk

@@ -116,8 +116,8 @@ $(libffi_STAMP_CONFIGURE):
 	    LD=$(LD) \
 	    AR=$(AR) \
 	    NM=$(NM) \
-        CFLAGS="$(SRC_CC_OPTS) $(CONF_CC_OPTS) -w" \
-        LDFLAGS="$(SRC_LD_OPTS) $(CONF_LD_OPTS) -w" \
+        CFLAGS="$(SRC_CC_OPTS) $(CONF_CC_OPTS_STAGE1) -w" \
+        LDFLAGS="$(SRC_LD_OPTS) $(CONF_LD_OPTS_STAGE1) -w" \
         "$(SHELL)" configure \
 	          --enable-static=yes \
 	          --enable-shared=$(libffi_EnableShared) \
@@ -173,7 +173,7 @@ $(eval $(call all-target,libffi,$(INSTALL_HEADERS) $(INSTALL_LIBS)))
 libffi/dist-install/build/HSffi.o: libffi/dist-install/build/libHSffi.a
 	cd libffi/dist-install/build && \
 	  touch empty.c && \
-	  "$(CC)" $(SRC_CC_OPTS) $(CONF_CC_OPTS) -c empty.c -o HSffi.o
+	  "$(CC)" $(SRC_CC_OPTS) $(CONF_CC_OPTS_STAGE1) -c empty.c -o HSffi.o
 
 $(eval $(call all-target,libffi,libffi/dist-install/build/HSffi.o))
 

mk/config.mk.in

@@ -535,14 +535,18 @@ endif
 
 # C compiler and linker flags from configure (e.g. -m<blah> to select
 # correct C compiler backend).
-CONF_CC_OPTS = @CONF_CC_OPTS@
-CONF_LD_OPTS = @CONF_LD_OPTS@
+CONF_CC_OPTS_STAGE0 = @CONF_CC_OPTS_STAGE0@
+CONF_CC_OPTS_STAGE1 = @CONF_CC_OPTS_STAGE1@
+CONF_CC_OPTS_STAGE2 = @CONF_CC_OPTS_STAGE2@
+CONF_LD_OPTS_STAGE0 = @CONF_LD_OPTS_STAGE0@
+CONF_LD_OPTS_STAGE1 = @CONF_LD_OPTS_STAGE1@
+CONF_LD_OPTS_STAGE2 = @CONF_LD_OPTS_STAGE2@
 
 ifeq "$(TARGETPLATFORM)" "ia64-unknown-linux"
 CONF_CC_OPTS += -G0
 endif
 
-SRC_HSC2HS_OPTS += $(addprefix --cflag=,$(filter-out -O,$(SRC_CC_OPTS) $(CONF_CC_OPTS)))
+SRC_HSC2HS_OPTS += $(addprefix --cflag=,$(filter-out -O,$(SRC_CC_OPTS) $(CONF_CC_OPTS_STAGE0)))
 SRC_HSC2HS_OPTS += $(foreach d,$(GMP_INCLUDE_DIRS),-I$(d))
 
 #-----------------------------------------------------------------------------

rules/build-package-data.mk

@@ -31,7 +31,7 @@ endif
 # We filter out -Werror from SRC_CC_OPTS, because when configure tests
 # for a feature it may not generate warning-free C code, and thus may
 # think that the feature doesn't exist if -Werror is on.
-$1_$2_CONFIGURE_OPTS += --configure-option=CFLAGS="$$(filter-out -Werror,$$(SRC_CC_OPTS)) $$(CONF_CC_OPTS) $$($1_CC_OPTS) $$($1_$2_CC_OPTS)"
+$1_$2_CONFIGURE_OPTS += --configure-option=CFLAGS="$$(filter-out -Werror,$$(SRC_CC_OPTS)) $$(CONF_CC_OPTS_STAGE$3) $$($1_CC_OPTS) $$($1_$2_CC_OPTS)"
 $1_$2_CONFIGURE_OPTS += --configure-option=LDFLAGS="$$(SRC_LD_OPTS) $$($1_LD_OPTS) $$($1_$2_LD_OPTS)"
 
 ifneq "$$(ICONV_INCLUDE_DIRS)" ""

rules/distdir-way-opts.mk

@@ -82,7 +82,7 @@ $1_$2_CC_INC_FLAGS:=$$(shell for i in $$($1_$2_DEP_INCLUDE_DIRS); do echo $$($1_
 endif
 
 $1_$2_DIST_CC_OPTS = \
- $$(CONF_CC_OPTS) \
+ $$(CONF_CC_OPTS_STAGE$4) \
  $$(SRC_CC_OPTS) \
  $$($1_CC_OPTS) \
  $$(foreach dir,$$(filter-out /%,$$($1_$2_INCLUDE_DIRS)),-I$1/$$(dir)) \
@@ -97,7 +97,7 @@ $1_$2_DIST_LD_LIB_DIRS:=$$(shell for i in $$($1_$2_DEP_LIB_DIRS); do echo \"-L$$
 endif
 
 $1_$2_DIST_LD_OPTS = \
- $$(CONF_LD_OPTS) \
+ $$(CONF_LD_OPTS_STAGE$4) \
  $$(SRC_LD_OPTS) \
  $$($1_LD_OPTS) \
  $$($1_$2_LD_OPTS) \