1##                                                          -*- Autoconf -*-
2
3# Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007
4# Free Software Foundation, Inc.
5#
6# This file is free software; the Free Software Foundation
7# gives unlimited permission to copy and/or distribute it,
8# with or without modifications, as long as this notice is preserved.
9
10# serial 8
11
12# Based on depend.m4 from automake 1.9, modified for standalone use in
13# an environment where GNU make is required.
14
15# ZW_PROG_COMPILER_DEPENDENCIES
16# -----------------------------
17# Variant of _AM_DEPENDENCIES which just does the dependency probe and
18# sets fooDEPMODE accordingly.  Cache-variable compatible with
19# original; not side-effect compatible.  As the users of this macro
20# may require accurate dependencies for correct builds, it does *not*
21# honor --disable-dependency-checking, and failure to detect a usable
22# method is an error.  depcomp is assumed to be located in
23# $ac_aux_dir.
24#
25# FIXME: Should use the Autoconf 2.5x language-selection mechanism.
26
27AC_DEFUN([ZW_PROG_COMPILER_DEPENDENCIES],
28[ifelse([$1], CC,   [depcc="$CC"   am_compiler_list=],
29        [$1], CXX,  [depcc="$CXX"  am_compiler_list=],
30        [$1], OBJC, [depcc="$OBJC" am_compiler_list='gcc3 gcc'],
31        [$1], GCJ,  [depcc="$GCJ"  am_compiler_list='gcc3 gcc'],
32                    [depcc="$$1"   am_compiler_list=])
33
34am_depcomp=$ac_aux_dir/depcomp
35AC_CACHE_CHECK([dependency style of $depcc],
36               [am_cv_$1_dependencies_compiler_type],
37[if test -f "$am_depcomp"; then
38  # We make a subdir and do the tests there.  Otherwise we can end up
39  # making bogus files that we don't know about and never remove.  For
40  # instance it was reported that on HP-UX the gcc test will end up
41  # making a dummy file named `D' -- because `-MD' means `put the output
42  # in D'.
43  mkdir conftest.dir
44  # Copy depcomp to subdir because otherwise we won't find it if we're
45  # using a relative directory.
46  cp "$am_depcomp" conftest.dir
47  cd conftest.dir
48  # We will build objects and dependencies in a subdirectory because
49  # it helps to detect inapplicable dependency modes.  For instance
50  # both Tru64's cc and ICC support -MD to output dependencies as a
51  # side effect of compilation, but ICC will put the dependencies in
52  # the current directory while Tru64 will put them in the object
53  # directory.
54  mkdir sub
55
56  am_cv_$1_dependencies_compiler_type=none
57  if test "$am_compiler_list" = ""; then
58     am_compiler_list=`sed -n ['s/^\([a-zA-Z0-9]*\))$/\1/p'] < ./depcomp`
59  fi
60  for depmode in $am_compiler_list; do
61    if test $depmode = none; then break; fi
62
63    _AS_ECHO([$as_me:$LINENO: trying $depmode], AS_MESSAGE_LOG_FD)
64    # Setup a source with many dependencies, because some compilers
65    # like to wrap large dependency lists on column 80 (with \), and
66    # we should not choose a depcomp mode which is confused by this.
67    #
68    # We need to recreate these files for each test, as the compiler may
69    # overwrite some of them when testing with obscure command lines.
70    # This happens at least with the AIX C compiler.
71    : > sub/conftest.c
72    for i in 1 2 3 4 5 6; do
73      echo '#include "conftst'$i'.h"' >> sub/conftest.c
74      # Using `: > sub/conftst$i.h' creates only sub/conftst1.h with
75      # Solaris 8's {/usr,}/bin/sh.
76      touch sub/conftst$i.h
77    done
78    echo "include sub/conftest.Po" > confmf
79
80    # We check with `-c' and `-o' for the sake of the "dashmstdout"
81    # mode.  It turns out that the SunPro C++ compiler does not properly
82    # handle `-M -o', and we need to detect this.
83    depcmd="depmode=$depmode \
84       source=sub/conftest.c object=sub/conftest.${OBJEXT-o} \
85       depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
86       $SHELL ./depcomp $depcc -c -o sub/conftest.${OBJEXT-o} sub/conftest.c"
87    echo "| $depcmd" | sed -e 's/  */ /g' >&AS_MESSAGE_LOG_FD
88    if env $depcmd > conftest.err 2>&1 &&
89       grep sub/conftst6.h sub/conftest.Po >>conftest.err 2>&1 &&
90       grep sub/conftest.${OBJEXT-o} sub/conftest.Po >>conftest.err 2>&1 &&
91       ${MAKE-make} -s -f confmf >>conftest.err 2>&1; then
92      # icc doesn't choke on unknown options, it will just issue warnings
93      # or remarks (even with -Werror).  So we grep stderr for any message
94      # that says an option was ignored or not supported.
95      # When given -MP, icc 7.0 and 7.1 complain thusly:
96      #   icc: Command line warning: ignoring option '-M'; no argument required
97      # The diagnosis changed in icc 8.0:
98      #   icc: Command line remark: option '-MP' not supported
99      if (grep 'ignoring option' conftest.err ||
100          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
101        am_cv_$1_dependencies_compiler_type=$depmode
102	_AS_ECHO([$as_me:$LINENO: success], AS_MESSAGE_LOG_FD)
103        break
104      fi
105    fi
106    _AS_ECHO([$as_me:$LINENO: failure, diagnostics are:], AS_MESSAGE_LOG_FD)
107    sed -e 's/^/| /' < conftest.err >&AS_MESSAGE_LOG_FD
108  done
109
110  cd ..
111  rm -rf conftest.dir
112else
113  am_cv_$1_dependencies_compiler_type=none
114fi
115])
116if test x${am_cv_$1_dependencies_compiler_type-none} = xnone
117then AC_MSG_ERROR([no usable dependency style found])
118else AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
119fi
120])
121
122# AM_SET_DEPDIR
123# -------------
124# Choose a directory name for dependency files.
125AC_DEFUN([AM_SET_DEPDIR],
126[AC_REQUIRE([AM_SET_LEADING_DOT])dnl
127AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
128])
129
130# ZW_CREATE_DEPDIR
131# ----------------
132# As AM_SET_DEPDIR, but also create the directory at config.status time.
133AC_DEFUN([ZW_CREATE_DEPDIR],
134[AC_REQUIRE([AM_SET_DEPDIR])dnl
135AC_CONFIG_COMMANDS([depdir], [$SHELL $ac_aux_dir/mkinstalldirs $DEPDIR],
136			     [ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
137])
138