summaryrefslogtreecommitdiff
path: root/config/depstand.m4
blob: beaf2cc7bf003c75eea59846eb7dffe2d2008259 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
##                                                          -*- Autoconf -*-

# Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007
# Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.

# serial 8

# Based on depend.m4 from automake 1.9, modified for standalone use in
# an environment where GNU make is required. 

# ZW_PROG_COMPILER_DEPENDENCIES
# -----------------------------
# Variant of _AM_DEPENDENCIES which just does the dependency probe and
# sets fooDEPMODE accordingly.  Cache-variable compatible with
# original; not side-effect compatible.  As the users of this macro
# may require accurate dependencies for correct builds, it does *not*
# honor --disable-dependency-checking, and failure to detect a usable
# method is an error.  depcomp is assumed to be located in
# $ac_aux_dir.
#
# FIXME: Should use the Autoconf 2.5x language-selection mechanism.

AC_DEFUN([ZW_PROG_COMPILER_DEPENDENCIES],
[ifelse([$1], CC,   [depcc="$CC"   am_compiler_list=],
        [$1], CXX,  [depcc="$CXX"  am_compiler_list=],
        [$1], OBJC, [depcc="$OBJC" am_compiler_list='gcc3 gcc'],
        [$1], GCJ,  [depcc="$GCJ"  am_compiler_list='gcc3 gcc'],
                    [depcc="$$1"   am_compiler_list=])

am_depcomp=$ac_aux_dir/depcomp
AC_CACHE_CHECK([dependency style of $depcc],
               [am_cv_$1_dependencies_compiler_type],
[if test -f "$am_depcomp"; then
  # We make a subdir and do the tests there.  Otherwise we can end up
  # making bogus files that we don't know about and never remove.  For
  # instance it was reported that on HP-UX the gcc test will end up
  # making a dummy file named `D' -- because `-MD' means `put the output
  # in D'.
  mkdir conftest.dir
  # Copy depcomp to subdir because otherwise we won't find it if we're
  # using a relative directory.
  cp "$am_depcomp" conftest.dir
  cd conftest.dir
  # We will build objects and dependencies in a subdirectory because
  # it helps to detect inapplicable dependency modes.  For instance
  # both Tru64's cc and ICC support -MD to output dependencies as a
  # side effect of compilation, but ICC will put the dependencies in
  # the current directory while Tru64 will put them in the object
  # directory.
  mkdir sub

  am_cv_$1_dependencies_compiler_type=none
  if test "$am_compiler_list" = ""; then
     am_compiler_list=`sed -n ['s/^\([a-zA-Z0-9]*\))$/\1/p'] < ./depcomp`
  fi
  for depmode in $am_compiler_list; do
    if test $depmode = none; then break; fi

    _AS_ECHO([$as_me:$LINENO: trying $depmode], AS_MESSAGE_LOG_FD)
    # Setup a source with many dependencies, because some compilers
    # like to wrap large dependency lists on column 80 (with \), and
    # we should not choose a depcomp mode which is confused by this.
    #
    # We need to recreate these files for each test, as the compiler may
    # overwrite some of them when testing with obscure command lines.
    # This happens at least with the AIX C compiler.
    : > sub/conftest.c
    for i in 1 2 3 4 5 6; do
      echo '#include "conftst'$i'.h"' >> sub/conftest.c
      # Using `: > sub/conftst$i.h' creates only sub/conftst1.h with
      # Solaris 8's {/usr,}/bin/sh.
      touch sub/conftst$i.h
    done
    echo "include sub/conftest.Po" > confmf

    # We check with `-c' and `-o' for the sake of the "dashmstdout"
    # mode.  It turns out that the SunPro C++ compiler does not properly
    # handle `-M -o', and we need to detect this.
    depcmd="depmode=$depmode \
       source=sub/conftest.c object=sub/conftest.${OBJEXT-o} \
       depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
       $SHELL ./depcomp $depcc -c -o sub/conftest.${OBJEXT-o} sub/conftest.c"
    echo "| $depcmd" | sed -e 's/  */ /g' >&AS_MESSAGE_LOG_FD
    if env $depcmd > conftest.err 2>&1 &&
       grep sub/conftst6.h sub/conftest.Po >>conftest.err 2>&1 &&
       grep sub/conftest.${OBJEXT-o} sub/conftest.Po >>conftest.err 2>&1 &&
       ${MAKE-make} -s -f confmf >>conftest.err 2>&1; then
      # icc doesn't choke on unknown options, it will just issue warnings
      # or remarks (even with -Werror).  So we grep stderr for any message
      # that says an option was ignored or not supported.
      # When given -MP, icc 7.0 and 7.1 complain thusly:
      #   icc: Command line warning: ignoring option '-M'; no argument required
      # The diagnosis changed in icc 8.0:
      #   icc: Command line remark: option '-MP' not supported
      if (grep 'ignoring option' conftest.err ||
          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
        am_cv_$1_dependencies_compiler_type=$depmode
	_AS_ECHO([$as_me:$LINENO: success], AS_MESSAGE_LOG_FD)
        break
      fi
    fi
    _AS_ECHO([$as_me:$LINENO: failure, diagnostics are:], AS_MESSAGE_LOG_FD)
    sed -e 's/^/| /' < conftest.err >&AS_MESSAGE_LOG_FD
  done

  cd ..
  rm -rf conftest.dir
else
  am_cv_$1_dependencies_compiler_type=none
fi
])
if test x${am_cv_$1_dependencies_compiler_type-none} = xnone
then AC_MSG_ERROR([no usable dependency style found])
else AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
fi
])

# AM_SET_DEPDIR
# -------------
# Choose a directory name for dependency files.
AC_DEFUN([AM_SET_DEPDIR],
[AC_REQUIRE([AM_SET_LEADING_DOT])dnl
AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
])

# ZW_CREATE_DEPDIR
# ----------------
# As AM_SET_DEPDIR, but also create the directory at config.status time.
AC_DEFUN([ZW_CREATE_DEPDIR],
[AC_REQUIRE([AM_SET_DEPDIR])dnl
AC_CONFIG_COMMANDS([depdir], [$SHELL $ac_aux_dir/mkinstalldirs $DEPDIR],
			     [ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
])