openmpi/config/opal_check_package.m4

dnl -*- shell-script -*-
dnl
dnl Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
dnl                         University Research and Technology
dnl                         Corporation.  All rights reserved.
dnl Copyright (c) 2004-2005 The University of Tennessee and The University
dnl                         of Tennessee Research Foundation.  All rights
dnl                         reserved.
dnl Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
dnl                         University of Stuttgart.  All rights reserved.
dnl Copyright (c) 2004-2005 The Regents of the University of California.
dnl                         All rights reserved.
dnl Copyright (c) 2012-2015 Cisco Systems, Inc.  All rights reserved.
dnl Copyright (c) 2012      Oracle and/or its affiliates.  All rights reserved.
dnl Copyright (c) 2014      Intel, Inc. All rights reserved.
dnl Copyright (c) 2015      Research Organization for Information Science
dnl                         and Technology (RIST). All rights reserved.
dnl $COPYRIGHT$
dnl
dnl Additional copyrights may follow
dnl
dnl $HEADER$
dnl

dnl _OPAL_CHECK_PACKAGE_HEADER(prefix, header, dir-prefix,
dnl                            [action-if-found], [action-if-not-found],
dnl                            includes)
dnl --------------------------------------------------------------------
AC_DEFUN([_OPAL_CHECK_PACKAGE_HEADER], [
    # This is stolen from autoconf to peek under the covers to get the
    # cache variable for the library check.  one should not copy this
    # code into other places unless you want much pain and suffering
    AS_VAR_PUSHDEF([opal_Header], [ac_cv_header_$2])

    # so this sucks, but there's no way to get through the progression
    # of header includes without killing off the cache variable and trying
    # again...
    unset opal_Header

    opal_check_package_header_happy="no"
    AS_IF([test "$3" = "/usr" || \
           test "$3" = "/usr/local"],
           [ # try as is...
            AC_VERBOSE([looking for header without includes])
            AC_CHECK_HEADERS([$2], [opal_check_package_header_happy="yes"], [])
            AS_IF([test "$opal_check_package_header_happy" = "no"],
                  [# no go on the as is - reset the cache and try again
                   unset opal_Header])])

    AS_IF([test "$opal_check_package_header_happy" = "no"],
          [AS_IF([test "$3" != ""],
                 [$1_CPPFLAGS="$$1_CPPFLAGS -I$3/include"
                  CPPFLAGS="$CPPFLAGS -I$3/include"])
          AC_CHECK_HEADERS([$2], [opal_check_package_header_happy="yes"], [], [$6])
	  AS_IF([test "$opal_check_package_header_happy" = "yes"], [$4], [$5])],
          [$4])
    unset opal_check_package_header_happy

    AS_VAR_POPDEF([opal_Header])dnl
])


dnl _OPAL_CHECK_PACKAGE_LIB(prefix, library, function, extra-libraries,
dnl                         dir-prefix, libdir,
dnl                         [action-if-found], [action-if-not-found]])
dnl --------------------------------------------------------------------
AC_DEFUN([_OPAL_CHECK_PACKAGE_LIB], [
    # This is stolen from autoconf to peek under the covers to get the
    # cache variable for the library check.  one should not copy this
    # code into other places unless you want much pain and suffering
    AS_VAR_PUSHDEF([opal_Lib], [ac_cv_search_$3])

    # see comment above
    unset opal_Lib
    opal_check_package_lib_happy="no"
    AS_IF([test "$6" != ""],
          [ # libdir was specified - search only there
           $1_LDFLAGS="$$1_LDFLAGS -L$6"
           LDFLAGS="$LDFLAGS -L$6"
           AC_SEARCH_LIBS([$3], [$2],
                        [opal_check_package_lib_happy="yes"],
                        [opal_check_package_lib_happy="no"], [$4])
           AS_IF([test "$opal_check_package_lib_happy" = "no"],
                 [LDFLAGS="$opal_check_package_$1_save_LDFLAGS"
                  $1_LDFLAGS="$opal_check_package_$1_orig_LDFLAGS"
                  unset opal_Lib])],
          [ # libdir was not specified - go through search path
           opal_check_package_libdir="$5"
           AS_IF([test "$opal_check_package_libdir" = "" || \
                  test "$opal_check_package_libdir" = "/usr" || \
                  test "$opal_check_package_libdir" = "/usr/local"],
               [ # try as is...
                AC_VERBOSE([looking for library without search path])
                AC_SEARCH_LIBS([$3], [$2],
                        [opal_check_package_lib_happy="yes"],
                        [opal_check_package_lib_happy="no"], [$4])
                AS_IF([test "$opal_check_package_lib_happy" = "no"],
                    [ # no go on the as is..  see what happens later...
                     LDFLAGS="$opal_check_package_$1_save_LDFLAGS"
                     $1_LDFLAGS="$opal_check_package_$1_orig_LDFLAGS"
                     unset opal_Lib])])

           AS_IF([test "$opal_check_package_lib_happy" = "no"],
               [AS_IF([test "$opal_check_package_libdir" != ""],
                    [$1_LDFLAGS="$$1_LDFLAGS -L$opal_check_package_libdir/lib"
                     LDFLAGS="$LDFLAGS -L$opal_check_package_libdir/lib"
                     AC_VERBOSE([looking for library in lib])
                     AC_SEARCH_LIBS([$3], [$2],
                               [opal_check_package_lib_happy="yes"],
                               [opal_check_package_lib_happy="no"], [$4])
                     AS_IF([test "$opal_check_package_lib_happy" = "no"],
                         [ # no go on the as is..  see what happens later...
                          LDFLAGS="$opal_check_package_$1_save_LDFLAGS"
                          $1_LDFLAGS="$opal_check_package_$1_orig_LDFLAGS"
                          unset opal_Lib])])])

           AS_IF([test "$opal_check_package_lib_happy" = "no"],
               [AS_IF([test "$opal_check_package_libdir" != ""],
                    [$1_LDFLAGS="$$1_LDFLAGS -L$opal_check_package_libdir/lib64"
                     LDFLAGS="$LDFLAGS -L$opal_check_package_libdir/lib64"
                     AC_VERBOSE([looking for library in lib64])
                     AC_SEARCH_LIBS([$3], [$2],
                               [opal_check_package_lib_happy="yes"],
                               [opal_check_package_lib_happy="no"], [$4])
                     AS_IF([test "$opal_check_package_lib_happy" = "no"],
                         [ # no go on the as is..  see what happens later...
                          LDFLAGS="$opal_check_package_$1_save_LDFLAGS"
                          $1_LDFLAGS="$opal_check_package_$1_orig_LDFLAGS"
                          unset opal_Lib])])])])

    AS_IF([test "$opal_check_package_lib_happy" = "yes"],
          [ # The result of AC SEARCH_LIBS is cached in $ac_cv_search_[function]
           AS_IF([test "$ac_cv_search_$3" != "no" &&
                  test "$ac_cv_search_$3" != "none required"],
                 [$1_LIBS="$ac_cv_search_$3 $4"],
                 [$1_LIBS="$4"])
           $7],
          [$8])

    AS_VAR_POPDEF([opal_Lib])dnl
])


dnl OPAL_CHECK_PACKAGE(prefix,
dnl                    header,
dnl                    library,
dnl                    function,
dnl                    extra-libraries,
dnl                    dir-prefix,
dnl                    libdir-prefix,
dnl                    [action-if-found], [action-if-not-found],
dnl                    includes)
dnl -----------------------------------------------------------
dnl Check for package defined by header and libs, and probably
dnl located in dir-prefix, possibly with libs in libdir-prefix.
dnl Both dir-prefix and libdir-prefix can be empty.  Will set
dnl prefix_{CPPFLAGS, LDFLAGS, LIBS} as needed.
dnl
dnl The general intent of this macro is to provide finer-grained scoping
dnl of C preprocessor flags, linker flags, and libraries (as opposed to
dnl unconditionally adding to the top-level CPFLAGS, LDFLAGS, and LIBS,
dnl which get used to compile/link *everything*).
dnl
dnl Here is a breakdown of the parameters:
dnl
dnl * prefix: the macro sets $prefix_CPPFLAGS, $prefix_LDFLAGS, and
dnl   $prefix_LIBS (and AC_SUBSTs all of them).  For example, if a
dnl   provider uses this macro to check for a header/library that it
dnl   needs, it might well set prefix to be its provider name.
dnl * header_filename: the foo.h file to check for
dnl * library_name / function_name: check for function function_name in
dnl   -llibrary_name.  Specifically, for library_name, use the "foo" form,
dnl   as opposed to "libfoo".
dnl * extra_libraries: if the library_name you are checking for requires
dnl   additonal -l arguments to link successfully, list them here.
dnl * dir_prefix: if the header/library is located in a non-standard
dnl   location (e.g., /opt/foo as opposed to /usr), list it here
dnl * libdir_prefix: if the library is not under $dir_prefix/lib or
dnl   $dir_prefix/lib64, list it here.
dnl * action_if_found: if both the header and library are found and
dnl   usable, execute action_if_found
dnl * action_if_not_found: otherwise, execute action_if_not_found
dnl * extra_includes: if including header_filename requires additional
dnl   headers to be included first, list them here
dnl
dnl The output _CPPFLAGS, _LDFLAGS, and _LIBS can be used to limit the
dnl scope various flags in Makefiles.
dnl
AC_DEFUN([OPAL_CHECK_PACKAGE],[
    opal_check_package_$1_save_CPPFLAGS="$CPPFLAGS"
    opal_check_package_$1_save_LDFLAGS="$LDFLAGS"
    opal_check_package_$1_save_LIBS="$LIBS"

    opal_check_package_$1_orig_CPPFLAGS="$$1_CPPFLAGS"
    opal_check_package_$1_orig_LDFLAGS="$$1_LDFLAGS"
    opal_check_package_$1_orig_LIBS="$$1_LIBS"

    _OPAL_CHECK_PACKAGE_HEADER([$1], [$2], [$6],
          [_OPAL_CHECK_PACKAGE_LIB([$1], [$3], [$4], [$5], [$6], [$7],
                [opal_check_package_happy="yes"],
                [opal_check_package_happy="no"])],
          [opal_check_package_happy="no"],
          [$10])

    AS_IF([test "$opal_check_package_happy" = "yes"],
          [$8],
          [$1_CPPFLAGS="$opal_check_package_$1_orig_CPPFLAGS"
           $1_LDFLAGS="$opal_check_package_$1_orig_LDFLAGS"
           $1_LIBS="$opal_check_package_$1_orig_LIBS"
           $9])

    CPPFLAGS="$opal_check_package_$1_save_CPPFLAGS"
    LDFLAGS="$opal_check_package_$1_save_LDFLAGS"
    LIBS="$opal_check_package_$1_save_LIBS"
])