source: src/router/wireless-tools/Makefile

##
## Please check the configurion parameters below
##

## Installation directory. By default, go in /usr/local.
## Distributions should probably use /, but they probably know better...
ifndef PREFIX
  PREFIX = /usr/local
endif

## Compiler to use (modify this for cross compile).
CC = gcc
## Other tools you need to modify for cross compile (static lib only).
AR = ar
RANLIB = ranlib

## Uncomment this to build tools using static version of the library.
## Mostly useful for embedded platforms without ldd, or to create
## a local version (non-root).
# BUILD_STATIC = y

## Uncomment this to build without using libm (less efficient).
## This is mostly useful for embedded platforms without maths.
BUILD_NOLIBM = y

## Uncomment this to strip binary from symbols. This reduce binary size.
## by a few percent but make debug worse...
# BUILD_STRIPPING = y

## Uncomment this to build with only essential functionality.
## This leaves out the less used features and cut in half the tools.
## This is mostly useful for embedded platforms without limited feature needs.
# BUILD_WE_ESSENTIAL = y

# ***************************************************************************
# ***** Most users should not need to change anything beyond this point *****
# ***************************************************************************

# Version of the Wireless Tools
WT_VERSION := $(shell sed -ne "/WT_VERSION/{s:\([^0-9]*\)::;p;q;}" < iwlib.h )

# Version of Wireless Extensions.
WE_VERSION := $(shell sed -ne "/WE_VERSION/{s:\([^0-9]*\)::;p;q;}" < iwlib.h )

# Always use local header for wireless extensions
WEXT_HEADER = wireless.$(WE_VERSION).h

# Targets to build
STATIC=libiw.a
DYNAMIC=libiw.so.$(WT_VERSION)
PROGS= iwconfig iwlist iwpriv 
#iwevent
MANPAGES8=iwconfig.8 iwlist.8 iwpriv.8 iwspy.8 iwgetid.8 iwevent.8 ifrename.8
MANPAGES7=wireless.7
MANPAGES5=iftab.5
EXTRAPROGS= macaddr iwmulticall

# Composition of the library :
OBJS = iwlib.o

# Select which library to build and to link tool with
ifdef BUILD_STATIC
  IWLIB=$(STATIC)
  IWLIB_INSTALL=install-static
else
  IWLIB=$(DYNAMIC)
  IWLIB_INSTALL=install-dynamic
endif

# Standard name for dynamic library so that the dynamic linker can pick it.
# We will just create a symbolic link to the real thing.
DYNAMIC_LINK= libiw.so

# Install directories
INSTALL_DIR= $(PREFIX)/sbin/
INSTALL_LIB= $(PREFIX)/lib/
INSTALL_INC= $(PREFIX)/include/
INSTALL_MAN= $(PREFIX)/man/

# Various commands
RM = rm -f
RM_CMD = $(RM) *.BAK *.bak *.d *.o *.so ,* *~ *.a *.orig *.rej *.out
LDCONFIG = ldconfig

# Do we want to build with or without libm ?
ifdef BUILD_NOLIBM
  LIBS=
  WELIB_FLAG= -DWE_NOLIBM=y
else
  LIBS= -lm
endif

# Stripping or not ?
ifdef BUILD_STRIPPING
  STRIPFLAGS= -Wl,-s
else
  STRIPFLAGS=
endif

# Do we want to build with only essential functionality ?
ifdef BUILD_WE_ESSENTIAL
  WEDEF_FLAG= -DWE_ESSENTIAL=y
endif

# Other flags
CFLAGS=$(COPTS) -W -Wall -Wstrict-prototypes -Wmissing-prototypes -Wshadow -DNEED_PRINTF \
        -Wpointer-arith -Wcast-qual -Winline -I.
#CFLAGS=-O2 -W -Wall -Wstrict-prototypes -I.
DEPFLAGS=-MMD
XCFLAGS=$(CFLAGS) $(DEPFLAGS) $(WARN) $(HEADERS) $(WELIB_FLAG) $(WEDEF_FLAG) -DNEED_PRINTF
PICFLAG=-fPIC

# Standard compilation targets
all:: $(IWLIB) $(PROGS)

%: %.o
        $(CC) $(LDFLAGS) $(STRIPFLAGS) $(XCFLAGS) -o $@ $^ $(LIBS) 
%.o: %.c wireless.h
        $(CC) $(XCFLAGS) -c $<
%.so: %.c wireless.h
        $(CC) $(XCFLAGS) $(PICFLAG) -c -o $@ $<

iwconfig: iwconfig.o $(IWLIB)

iwlist: iwlist.o $(IWLIB)

iwpriv: iwpriv.o $(IWLIB)

iwspy: iwspy.o $(IWLIB)

iwgetid: iwgetid.o $(IWLIB)

iwevent: iwevent.o $(IWLIB)

ifrename: ifrename.o $(IWLIB)

macaddr: macaddr.o $(IWLIB)

# Always do symbol stripping here
iwmulticall: iwmulticall.o $(IWLIB)

# It's a kind of magic...
wireless.h:
        cp $(WEXT_HEADER) wireless.h

# Compilation of the dynamic library
$(DYNAMIC): $(OBJS:.o=.so)
        $(CC) -shared -o $@ -Wl,-soname,$@ $(STRIPFLAGS) $(LIBS) -lc $^

# Compilation of the static library
$(STATIC): $(OBJS:.o=.so)
        $(RM) $@
        $(AR) cru $@ $^
        $(RANLIB) $@

# Installation : So crude but so effective ;-)
# Less crude thanks to many contributions ;-)
install:: $(IWLIB_INSTALL) install-bin install-hdr install-man

# Install the dynamic library
install-dynamic:: $(DYNAMIC)
        install -m 755 -d $(INSTALL_LIB)
        install -m 755 $(DYNAMIC) $(INSTALL_LIB)
        ln -sfn $(DYNAMIC) $(INSTALL_LIB)/$(DYNAMIC_LINK)
        @echo "*** Don't forget to add $(INSTALL_LIB) to /etc/ld.so.conf, and run ldconfig as root. ***"
        @$(LDCONFIG) || echo "*** Could not run ldconfig ! ***"

# Install the static library
install-static:: $(STATIC)
        install -m 755 -d $(INSTALL_LIB)
        install -m 644 $(STATIC) $(INSTALL_LIB)

# All the binaries. Careful, no dependancy on install-dynamic
install-bin:: all
        install -m 755 -d $(INSTALL_DIR)
        install -m 755 $(PROGS) $(INSTALL_DIR)

# Headers to go with the wireless lib (dev)
install-hdr:: wireless.h
        install -m 755 -d $(INSTALL_INC)
        install -m 644 iwlib.h $(INSTALL_INC)
        install -m 644 wireless.h $(INSTALL_INC)

# How could you live without those manapages ?
install-man::
        install -m 755 -d $(INSTALL_MAN)/man8/
        install -m 644 $(MANPAGES8) $(INSTALL_MAN)/man8/
        install -m 755 -d $(INSTALL_MAN)/man7/
        install -m 644 $(MANPAGES7) $(INSTALL_MAN)/man7/
        install -m 755 -d $(INSTALL_MAN)/man5/
        install -m 644 $(MANPAGES5) $(INSTALL_MAN)/man5/

install-iwmulticall:: iwmulticall
        install -m 755 -d $(INSTALL_DIR)
        install -m 755 $< $(INSTALL_DIR)/iwconfig
        ( cd $(INSTALL_DIR) ; \
          ln -f -s iwconfig iwlist ; \
          ln -f -s iwconfig iwspy ; \
          ln -f -s iwconfig iwpriv ; \
          ln -f -s iwconfig iwgetid )

clean::
        $(RM_CMD) 

realclean::
        $(RM_CMD) 
        $(RM) $(STATIC) $(DYNAMIC) $(PROGS) $(EXTRAPROGS) libiw* wireless.h

uninstall::
        for f in $(PROGS); do \
          $(RM) $(INSTALL_DIR)/$$f; \
        done
        $(RM) $(INSTALL_LIB)/$(STATIC)
        $(RM) $(INSTALL_LIB)/$(DYNAMIC)
        $(RM) $(INSTALL_LIB)/$(DYNAMIC_LINK)
        $(RM) $(INSTALL_INC)/iwlib.h
        $(RM) $(INSTALL_INC)/wireless.h
        for f in $(MANPAGES8); do \
          $(RM) $(INSTALL_MAN)/man8/$$f; \
        done
        for f in $(MANPAGES7); do \
          $(RM) $(INSTALL_MAN)/man7/$$f; \
        done
        for f in $(MANPAGES5); do \
          $(RM) $(INSTALL_MAN)/man5/$$f; \
        done

# Include dependancies
-include *.d