mk/pthread.buildlink3.mk

   1 # $NetBSD: pthread.buildlink3.mk,v 1.28 2009/03/20 19:25:01 joerg Exp $
   2 #
   3 # The pthreads strategy for pkgsrc is to "bless" a particular pthread
   4 # package as the Official Pthread Replacement (OPR).  The following
   5 # variables may be set before including this file:
   6 #
   7 # PTHREAD_OPTS?= # empty
   8 #       A list of options to configure the search for a suitable pthreads
   9 #       implementation.
  10 #
  11 #       "native" means that only a native pthreads implementation is
  12 #               acceptable.
  13 #
  14 #       "optional" will override the effects of any instance of
  15 #               "require".  This should _only_ be used by those packages
  16 #               that can be built with or without pthreads independently
  17 #               of whether any of its dependencies need pthreads.
  18 #               Currently, this is only www/mozilla, which uses its own
  19 #               threading library if native pthreads are unavailable,
  20 #               despite that it uses GTK+, which _does_ need pthreads.
  21 #
  22 #       "require" means that the package is skipped silently when no
  23 #               implementation can be found.
  24 #
  25 #       By default, the native pthreads implementation is used if it's
  26 #       available. Otherwise the OPR is used.
  27 #
  28 # PTHREAD_AUTO_VARS?= no
  29 #       This variable specifies whether the values of the variables
  30 #       PTHREAD_{CFLAGS,CPPFLAGS,LDFLAGS,LIBS} should be automatically
  31 #       added to their respective variables.
  32 #
  33 # After inclusion of this file, the following variables may be examined:
  34 #
  35 # PTHREAD_TYPE
  36 #       The type of pthreads implementation that has been found.
  37 #
  38 #       "native" means that the native pthreads implementation is used.
  39 #
  40 #       "none" means that no suitable pthreads implementation could be
  41 #               found.
  42 #
  43 #       Any other value is the name of the package that is used as the
  44 #       pthread implementation.
  45 #
  46 #       Note that it's only safe to check and use the value of PTHREAD_TYPE
  47 #       after all other buildlink3.mk files have been included.
  48 #
  49 # The case where a package must use either the native pthread library or
  50 # some pthread package aside from the OPR (e.g. "ptl2") can be solved as
  51 # follows:
  52 #
  53 #       PTHREAD_OPTS+=  native
  54 #       #
  55 #       # more package Makefile stuff...
  56 #       #
  57 #       .include "../../mk/pthread.buildlink3.mk"
  58 #
  59 #       .if defined(PTHREAD_TYPE) && ${PTHREAD_TYPE} == "none"
  60 #       .  include "../../devel/ptl2/buildlink3.mk"
  61 #       .endif
  62 #
  63 #       .include "../../mk/bsd.pkg.mk"
  64
  65 PTHREAD_BUILDLINK3_MK:= ${PTHREAD_BUILDLINK3_MK}+
  66
  67 _VARGROUPS+=            pthread
  68 _PKG_VARS.pthread=      PTHREAD_OPTS PTHREAD_AUTO_VARS
  69 _SYS_VARS.pthread=      PTHREAD_TYPE PTHREAD_CFLAGS PTHREAD_LDFLAGS PTHREAD_LIBS
  70
  71 # The fall-back package pthread implementation
  72 _PKG_PTHREAD?=                  pth
  73 _PKG_PTHREAD_DEPENDS?=          pth>=2.0.0
  74 _PKG_PTHREAD_PKGSRCDIR?=        ../../devel/${_PKG_PTHREAD}
  75 _PKG_PTHREAD_BUILDLINK3_MK?=    ${_PKG_PTHREAD_PKGSRCDIR}/buildlink3.mk
  76
  77 # _PKG_PTHREAD_COMPAT_PATTERNS matches the ONLY_FOR_PLATFORMS from the
  78 # Makefile for ${_PKG_PTHREAD}.  It is used to see if ${_PKG_PTHREADS}
  79 # can actually be used to replace a native pthreads.
  80 _PKG_PTHREAD_COMPAT_PATTERNS=   *-*-*
  81
  82 .include "../../mk/bsd.fast.prefs.mk"
  83
  84 PTHREAD_OPTS?=  # empty
  85 #
  86 # We check for a native pthreads implementation by checking for the presence
  87 # of /usr/include/pthread.h (we might want to make this check stricter).
  88 #
  89 .undef PTHREAD_TYPE
  90 .if (exists(/usr/include/pthread.h) || ${OPSYS} == "Haiku") && \
  91     !empty(PREFER_NATIVE_PTHREADS:M[yY][eE][sS])
  92 PTHREAD_TYPE=   native
  93 .else
  94 .  if !empty(PTHREAD_OPTS:Mnative)
  95 PTHREAD_TYPE=   none
  96 .    if !empty(PTHREAD_OPTS:Mrequire) && empty(PTHREAD_OPTS:Moptional)
  97 PKG_FAIL_REASON= "${PKGNAME} requires a native pthreads implementation."
  98 .    endif
  99 .  else
 100 PTHREAD_TYPE=   none
 101 .    for _pattern_ in ${_PKG_PTHREAD_COMPAT_PATTERNS}
 102 .      if !empty(MACHINE_PLATFORM:M${_pattern_})
 103 PTHREAD_TYPE=   ${_PKG_PTHREAD}
 104 .      endif
 105 .    endfor
 106 .    if ${PTHREAD_TYPE} == "none" && \
 107         !empty(PTHREAD_OPTS:Mrequire) && empty(PTHREAD_OPTS:Moptional)
 108 PKG_FAIL_REASON= "${PKGNAME} requires a working pthreads implementation."
 109 .    endif
 110 .  endif
 111 .endif
 112
 113 PTHREAD_AUTO_VARS?=     no
 114
 115 .if ${PTHREAD_TYPE} == "native"
 116 BUILDLINK_TREE+=                pthread -pthread
 117 BUILDLINK_BUILTIN_MK.pthread=   ../../mk/pthread.builtin.mk
 118 BUILDLINK_AUTO_VARS.pthread?=   ${PTHREAD_AUTO_VARS}
 119 .elif ${PTHREAD_TYPE} == "${_PKG_PTHREAD}"
 120 .  if exists(${_PKG_PTHREAD_BUILDLINK3_MK})
 121 .    if !empty(_PKG_PTHREAD_DEPENDS)
 122 BUILDLINK_API_DEPENDS.${_PKG_PTHREAD}+= ${_PKG_PTHREAD_DEPENDS}
 123 .    endif
 124 .    include "${_PKG_PTHREAD_BUILDLINK3_MK}"
 125 BUILDLINK_PREFIX.pthread=               ${BUILDLINK_PREFIX.${_PKG_PTHREAD}}
 126 BUILDLINK_CFLAGS.pthread=               ${BUILDLINK_CFLAGS.${_PKG_PTHREAD}}
 127 BUILDLINK_CPPFLAGS.${_PKG_PTHREAD}?=    -D_REENTRANT
 128 BUILDLINK_CPPFLAGS.pthread=             ${BUILDLINK_CPPFLAGS.${_PKG_PTHREAD}}
 129 BUILDLINK_LDFLAGS.pthread=              ${BUILDLINK_LDFLAGS.${_PKG_PTHREAD}}
 130 BUILDLINK_LIBS.${_PKG_PTHREAD}?=        -lpthread
 131 BUILDLINK_LIBS.pthread=                 ${BUILDLINK_LIBS.${_PKG_PTHREAD}}
 132 BUILDLINK_AUTO_VARS.${_PKG_PTHREAD}?=   ${PTHREAD_AUTO_VARS}
 133 BUILDLINK_AUTO_VARS.pthread=            ${BUILDLINK_AUTO_VARS.${_PKG_PTHREAD}}
 134 .  else
 135 PKG_FAIL_REASON= ${PKGNAME:Q}" needs pthreads, but "${_PKG_PTHREAD_BUILDLINK3_MK:Q}" is missing."
 136 .  endif
 137 .endif
 138
 139 .if !empty(PTHREAD_BUILDLINK3_MK:M+)
 140 #
 141 # Define user-visible PTHREAD_{CFLAGS,LDFLAGS,LIBS} as compiler options
 142 # used to compile/link pthreaded code.
 143 #
 144 PTHREAD_CFLAGS=         ${BUILDLINK_CFLAGS.pthread}
 145 PTHREAD_CFLAGS+=        ${BUILDLINK_CPPFLAGS.pthread}
 146 PTHREAD_LDFLAGS=        ${BUILDLINK_LDFLAGS.pthread}
 147 PTHREAD_LIBS=           ${BUILDLINK_LIBS.pthread}
 148 CONFIGURE_ENV+=         PTHREAD_CFLAGS=${PTHREAD_CFLAGS:Q}
 149 CONFIGURE_ENV+=         PTHREAD_LDFLAGS=${PTHREAD_LDFLAGS:Q}
 150 CONFIGURE_ENV+=         PTHREAD_LIBS=${PTHREAD_LIBS:Q}
 151 MAKE_ENV+=              PTHREAD_CFLAGS=${PTHREAD_CFLAGS:Q}
 152 MAKE_ENV+=              PTHREAD_LDFLAGS=${PTHREAD_LDFLAGS:Q}
 153 MAKE_ENV+=              PTHREAD_LIBS=${PTHREAD_LIBS:Q}
 154
 155 PTHREADBASE=            ${BUILDLINK_PREFIX.pthread}
 156 CONFIGURE_ENV+=         PTHREADBASE=${PTHREADBASE:Q}
 157 MAKE_ENV+=              PTHREADBASE=${PTHREADBASE:Q}
 158
 159 .endif  # PTHREAD_BUILDLINK3_MK