config/depstand.m4

   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
  27 AC_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
  34 am_depcomp=$ac_aux_dir/depcomp
  35 AC_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
 112 else
 113   am_cv_$1_dependencies_compiler_type=none
 114 fi
 115 ])
 116 if test x${am_cv_$1_dependencies_compiler_type-none} = xnone
 117 then AC_MSG_ERROR([no usable dependency style found])
 118 else AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
 119 fi
 120 ])
 121
 122 # AM_SET_DEPDIR
 123 # -------------
 124 # Choose a directory name for dependency files.
 125 AC_DEFUN([AM_SET_DEPDIR],
 126 [AC_REQUIRE([AM_SET_LEADING_DOT])dnl
 127 AC_SUBST([DEPDIR], ["${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.
 133 AC_DEFUN([ZW_CREATE_DEPDIR],
 134 [AC_REQUIRE([AM_SET_DEPDIR])dnl
 135 AC_CONFIG_COMMANDS([depdir], [$SHELL $ac_aux_dir/mkinstalldirs $DEPDIR],
 136                              [ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
 137 ])