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 <${SRCTOP}/Makefile.cfgparam>
  31
  32 # prevent kmod.mk inclusion in user's Makefile from setting up confusing targets
  33 _KMOD_BUILD=yes
  34 .include <${.CURDIR}/Makefile>
  35
  36 .include <${SRCTOP}/kernel/mk/defines.mk>
  37
  38 CFLAGS = \
  39         ${KERNEL_CFLAGS} \
  40         ${CERRWARN} \
  41         ${INCS:%=-I%} \
  42         ${DEFS}
  43
  44 LDFLAGS = ${KERNEL_LDFLAGS}
  45 .if !empty(MODULE_DEPS)
  46 LDFLAGS += -dy ${MODULE_DEPS:%=-N %}
  47 .endif
  48
  49 # generate all the hard link names even though we may not use it all
  50 LINKS=
  51 .if !empty(MODULE_TYPE_LINKS)
  52 .for type in ${MODULE_TYPE_LINKS}
  53 LINKS += "/kernel/${MODULE_TYPE}/${MODULE}" \
  54          "/kernel/${type}/${MODULE}"
  55 .endfor
  56 .endif
  57
  58 .OBJDIR: ${.CURDIR}/obj${BITS}
  59
  60 OBJS =  ${SRCS:%.c=%.o} \
  61         ${SRCS${BITS}:%.c=%.o}
  62
  63 all: ${MODULE}
  64
  65 clean cleandir:
  66
  67 .include <links.mk>
  68
  69 install:
  70         ${INSTALL} -d -m 755 "${DESTDIR}/kernel/${MODULE_TYPE}"
  71         ${INSTALL} -m 755 ${MODULE} "${DESTDIR}/kernel/${MODULE_TYPE}/${MODULE}"
  72 .if !empty(LINKS)
  73         @set ${LINKS}; ${_LINKS_SCRIPT}
  74 .endif
  75
  76 .PHONY: all clean cleandir install
  77
  78 install-misc: install-conf install-fw
  79
  80 install-conf: ${MODULE_CONF}
  81 .if !empty(MODULE_CONF)
  82         ${INSTALL} -d -m 755 "${DESTDIR}/kernel/${MODULE_TYPE}"
  83         ${INSTALL} -m 644 ${MODULE_CONF} "${DESTDIR}/kernel/${MODULE_TYPE}/${MODULE}.conf"
  84 .endif
  85
  86 install-fw: ${MODULE_FW}
  87 .if !empty(MODULE_FW)
  88         ${INSTALL} -d -m 755 "${DESTDIR}/kernel/firmware/${MODULE}"
  89 .for x in ${MODULE_FW}
  90         ${INSTALL} -m 644 ${x} "${DESTDIR}/kernel/firmware/${MODULE}"
  91 .endfor
  92 .endif
  93
  94 .PHONY: install-misc install-conf install-fw
  95
  96 ${MODULE}: ${OBJS}
  97         ${LD} ${LDFLAGS} -o ${.TARGET} ${.ALLSRC}
  98         ${CTFCONVERT} -L VERSION ${.TARGET}
  99
 100 .SUFFIXES: .o
 101
 102 .c.o:
 103         @mkdir -p ${.TARGET:H}
 104         ${CC} ${CFLAGS} -c -o ${.TARGET} ${.IMPSRC}