- fix errors in subdir makes
 - parallelize subdir runs
 - cleanup flag handling

--- a/Makefile
+++ b/Makefile
@@ -9,19 +9,19 @@
 	   vmconvert vmcp man mon_tools dasdinfo vmur cpuplugd ipl_tools \
 	   ziomon iucvterm hyptop cmsfs-fuse
 
-all: subdirs_make
+SUB_DIRS_ALL = $(patsubst %,subdirs_all_%,$(SUB_DIRS))
+SUB_DIRS_CLEAN = $(patsubst %,subdirs_clean_%,$(SUB_DIRS))
+SUB_DIRS_INSTALL = $(patsubst %,subdirs_install_%,$(SUB_DIRS))
 
-subdirs_make:
-	set -e ; for dir in $(SUB_DIRS) ; do \
-		cd $$dir ; $(MAKE) TOPDIR=$(TOPDIR) ARCH=$(ARCH); cd ..; \
-	done
+all: $(SUB_DIRS_ALL)
 
-clean:
-	set -e ; for dir in $(SUB_DIRS) ; do \
-		cd $$dir ; $(MAKE) TOPDIR=$(TOPDIR) ARCH=$(ARCH) clean; cd ..; \
-	done
+_subdir   = $(patsubst subdirs_%,%,$@)
+subdir    = $(shell expr $(_subdir) : '[^_]*_\(.*\)')
+subtarget = $(shell expr $(_subdir) : '\([^_]*\)_.*')
+subdirs_%:
+	$(MAKE) TOPDIR=$(TOPDIR) ARCH=$(ARCH) -C $(subdir) $(subtarget)
+
+clean: $(SUB_DIRS_CLEAN)
 
 install:
-	set -e ; for dir in $(SUB_DIRS) ; do \
-		cd $$dir ; $(MAKE) TOPDIR=$(TOPDIR) ARCH=$(ARCH) install; cd ..; \
-	done
+	$(MAKE) $(SUB_DIRS_INSTALL)
--- a/common.mak
+++ b/common.mak
@@ -17,10 +17,10 @@
 # Cross Compiling Support
 CROSS_COMPILE   =
 AS              = $(call echocmd,"  AS      ",/$@)$(CROSS_COMPILE)as
-LINK            = $(call echocmd,"  LINK    ",/$@)$(CROSS_COMPILE)gcc
+LINK            = $(call echocmd,"  LINK    ",/$@)$(CROSS_COMPILE)gcc $(CFLAGS) $(LDFLAGS)
 LD              = $(call echocmd,"  LD      ",/$@)$(CROSS_COMPILE)ld
 CC              = $(call echocmd,"  CC      ",/$@)$(CROSS_COMPILE)gcc
-LINKXX          = $(call echocmd,"  LINKXX  ",/$@)$(CROSS_COMPILE)g++
+LINKXX          = $(call echocmd,"  LINKXX  ",/$@)$(CROSS_COMPILE)g++ $(CXXFLAGS) $(LDFLAGS)
 CXX             = $(call echocmd,"  CXX     ",/$@)$(CROSS_COMPILE)g++
 CPP             = $(call echocmd,"  CPP     ",/$@)$(CROSS_COMPILE)gcc -E
 AR              = $(call echocmd,"  AR      ",/$@)$(CROSS_COMPILE)ar
@@ -41,14 +41,13 @@
 ZFCPDUMP_RD     = zfcpdump.rd
 export ZFCPDUMP_DIR ZFCPDUMP_IMAGE ZFCPDUMP_RD
 
-CFLAGS		= $(WARNFLAGS) -O3 -DS390_TOOLS_RELEASE=$(S390_TOOLS_RELEASE) \
-			-DS390_TOOLS_LIBDIR=$(TOOLS_LIBDIR) \
-			-DS390_TOOLS_SYSCONFDIR=$(SYSCONFDIR) \
-			-g $(OPT_FLAGS)
-CXXFLAGS	= $(WARNFLAGS) -O3 -DS390_TOOLS_RELEASE=$(S390_TOOLS_RELEASE) \
-			-DS390_TOOLS_LIBDIR=$(TOOLS_LIBDIR) \
-			-DS390_TOOLS_SYSCONFDIR=$(SYSCONFDIR) \
-			 -g $(OPT_FLAGS)
+CFLAGS		+= $(WARNFLAGS) $(OPT_FLAGS)
+CXXFLAGS	+= $(WARNFLAGS) $(OPT_FLAGS)
+CPPFLAGS	+= \
+	-DS390_TOOLS_RELEASE=$(S390_TOOLS_RELEASE) \
+	-DS390_TOOLS_LIBDIR=$(TOOLS_LIBDIR) \
+	-DS390_TOOLS_SYSCONFDIR=$(SYSCONFDIR)
+export CPPFLAGS
 
 # make G=1
 # Compile tools so that gcov can be used to collect code coverage data.
@@ -76,7 +75,7 @@
 	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@
 
 %: %.o
-	$(LINK) $(LDFLAGS) $^ $(LOADLIBES) $(LDLIBS) -o $@
+	$(LINK) $(CFLAGS) $(LDFLAGS) $^ $(LOADLIBES) $(LDLIBS) -o $@
 
 all:
 
--- a/zfcpdump/ramdisk/Makefile
+++ b/zfcpdump/ramdisk/Makefile
@@ -12,16 +12,14 @@
 
 all: $(ZFCPDUMP_RD)
 
-CFLAGS += -D_FILE_OFFSET_BITS=64
+CPPFLAGS += -D_FILE_OFFSET_BITS=64 -I../../include
+LDFLAGS  += -static
+LDLIBS   += -lz
 
 $(ZFCPDUMP_RD): zfcp_dumper
 	/bin/sh ./create_rd.sh $(ARCH)
 
-zfcp_dumper: zfcp_dumper.o
-	$(CC) -o zfcp_dumper -static zfcp_dumper.o -lz
-
 zfcp_dumper.o: zfcp_dumper.c zfcp_dumper.h
-	$(CC) $(CFLAGS) -c -I../../include zfcp_dumper.c
 
 install: $(ZFCPDUMP_RD)
 	/bin/sh ./create_rd.sh -i
@@ -29,6 +27,3 @@
 clean clobber:
 	/bin/sh ./create_rd.sh -r
 	rm -f *.o
-
-%.o: %.c
-	$(CC) $(CFLAGS) -c -o $@ $<
--- a/zfcpdump_v2/Makefile
+++ b/zfcpdump_v2/Makefile
@@ -6,12 +6,13 @@
 LINUX_DIR := linux-$(LINUX_VERSION)
 E2FSPROGS := e2fsprogs-1.41.3
 
-CFLAGS        += -D_FILE_OFFSET_BITS=64
+CPPFLAGS += -D_FILE_OFFSET_BITS=64 -DGZIP_SUPPORT
+LDFLAGS  += -static
+LDLIBS   += -lz
 
 all: zfcpdump.image
 
 zfcpdump: zfcpdump.c zfcpdump.h
-	$(CC) $(CFLAGS) -D GZIP_SUPPORT -static -o $@ zfcpdump.c -lz
 
 e2fsck:
 	tar xfzv $(E2FSPROGS).tar.gz
--- a/zipl/boot/Makefile
+++ b/zipl/boot/Makefile
@@ -3,9 +3,8 @@
 
 S390_TOOLS_VERSION_EBCDIC := $(shell echo -n $(S390_TOOLS_RELEASE) | dd conv=ebcdic 2> /dev/null | hexdump -v -e '/1 "0x%02x,"' | sed 's/.$$//')
 
-CFLAGS  += -I../include -D__ASSEMBLY__ \
+CPPFLAGS  += -I../include -D__ASSEMBLY__ \
 		-DS390_TOOLS_VERSION_EBCDIC=$(S390_TOOLS_VERSION_EBCDIC)
-LDFLAGS = -O2
 FILES	:= fba0.bin fba2.bin eckd0.bin eckd1a.bin eckd1b.bin eckd2.bin \
 	   eckd2dump.bin tapedump.bin stage3.bin tape0.bin fba2dump.bin \
 	   eckd2mvdump.bin
@@ -16,7 +15,7 @@
 %:	%.S
 
 %.o:	%.S
-	$(CC) $(CFLAGS) -c -o $@ $<
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<
 
 %.exec:	%.o
 	@STAGE=$$(                                  \