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