kernel/mk/kmod-build.mk

   1 #
   2 # Build and install a kernel module
   3 #
   4 # Inputs from user's Makefile:
   5 #
   6 #   MODULE              - name of the kernel module
   7 #   MODULE_TYPE         - "fs", "drv", etc.
   8 #   MODULE_TYPE_LINKS   - "fs", "drv", etc. which will be hardlinked to
   9 #                         MODULE_TYPE
  10 #   MODULE_DEPS         - dependencies
  11 #   MODULE_CONF         - name of .conf file to install
  12 #   MODULE_FW           - firmware files to install
  13 #   SRCS                - source files
  14 #   SRCS32              - additional source files (32-bit build only)
  15 #   SRCS64              - additional source files (64-bit build only)
  16 #   SRCS_DIRS           - additional source directories to search in
  17 #   INCS                - compiler include directives
  18 #   DEFS                - compiler defines (e.g., -DFOO -UBAR)
  19 #   CERRWARN            - compiler error warning args (e.g., -Wno-parentheses)
  20 #
  21 # Additionally, we get the following values from kmod.mk:
  22 #
  23 #   BITS                - should we build a 32-bit or a 64-bit binary
  24 #   SRCTOP              - root of the repository
  25 #
  26
  27 .include <unleashed.mk>
  28 .include <init.mk>
  29
  30 .include <${SRCTOP}/cfgparam.mk>
  31
  32 # prevent kmod.mk inclusion in user's Makefile from setting up confusing targets
  33 _KMOD_BUILD=yes
  34 .include <${.CURDIR}/Makefile>
  35
  36 .include <${SRCTOP}/kernel/mk/defines.mk>
  37
  38
  39 CFLAGS = \
  40         ${KERNEL_CFLAGS} \
  41         ${CERRWARN} \
  42         ${INCS:%=-I%} \
  43         ${DEFS}
  44
  45 LDFLAGS = ${KERNEL_LDFLAGS}
  46 .if !empty(MODULE_DEPS)
  47 LDFLAGS += -dy ${MODULE_DEPS:%=-N %}
  48 .endif
  49
  50 # generate all the hard link names even though we may not use it all
  51 LINKS=
  52 .if !empty(MODULE_TYPE_LINKS)
  53 .for type in ${MODULE_TYPE_LINKS}
  54 LINKS += "/kernel/${MODULE_TYPE}/${MODULE}" \
  55          "/kernel/${type}/${MODULE}"
  56 .endfor
  57 .endif
  58
  59 .OBJDIR: ${.CURDIR}/obj${BITS}
  60
  61 OBJS =  ${SRCS:%.c=%.o} \
  62         ${SRCS${BITS}:%.c=%.o}
  63
  64 all: ${MODULE}
  65
  66 clean cleandir:
  67
  68 .include <links.mk>
  69
  70 install:
  71         ${INSTALL} -d -m 755 "${DESTDIR}/kernel/${MODULE_TYPE}"
  72         ${INSTALL} -m 755 ${MODULE} "${DESTDIR}/kernel/${MODULE_TYPE}/${MODULE}"
  73 .if !empty(LINKS)
  74         @set ${LINKS}; ${_LINKS_SCRIPT}
  75 .endif
  76
  77 .PHONY: all clean cleandir install
  78
  79 install-misc: install-conf install-fw
  80
  81 install-conf: ${MODULE_CONF}
  82 .if !empty(MODULE_CONF)
  83         ${INSTALL} -d -m 755 "${DESTDIR}/kernel/${MODULE_TYPE}"
  84         ${INSTALL} -m 644 ${MODULE_CONF} "${DESTDIR}/kernel/${MODULE_TYPE}/${MODULE}.conf"
  85 .endif
  86
  87 install-fw: ${MODULE_FW}
  88 .if !empty(MODULE_FW)
  89         ${INSTALL} -d -m 755 "${DESTDIR}/kernel/firmware/${MODULE}"
  90 .for x in ${MODULE_FW}
  91         ${INSTALL} -m 644 ${x} "${DESTDIR}/kernel/firmware/${MODULE}"
  92 .endfor
  93 .endif
  94
  95 .PHONY: install-misc install-conf install-fw
  96
  97 ${MODULE}: ${OBJS}
  98         ${LD} ${LDFLAGS} -o ${.TARGET} ${.ALLSRC}
  99         ${CTFCONVERT} -L VERSION ${.TARGET}
 100
 101 .SUFFIXES: .o
 102
 103 .c.o:
 104         @mkdir -p ${.TARGET:H}
 105         ${CC} ${CFLAGS} -c -o ${.TARGET} ${.IMPSRC}