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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [config/] [depstand.m4] - Blame information for rev 264

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1 264 jeremybenn
##                                                          -*- Autoconf -*-
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# Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007
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# Free Software Foundation, Inc.
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#
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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# serial 8
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# Based on depend.m4 from automake 1.9, modified for standalone use in
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# an environment where GNU make is required.
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# ZW_PROG_COMPILER_DEPENDENCIES
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# -----------------------------
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# Variant of _AM_DEPENDENCIES which just does the dependency probe and
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# sets fooDEPMODE accordingly.  Cache-variable compatible with
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# original; not side-effect compatible.  As the users of this macro
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# may require accurate dependencies for correct builds, it does *not*
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# honor --disable-dependency-checking, and failure to detect a usable
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# method is an error.  depcomp is assumed to be located in
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# $ac_aux_dir.
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#
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# FIXME: Should use the Autoconf 2.5x language-selection mechanism.
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AC_DEFUN([ZW_PROG_COMPILER_DEPENDENCIES],
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[ifelse([$1], CC,   [depcc="$CC"   am_compiler_list=],
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        [$1], CXX,  [depcc="$CXX"  am_compiler_list=],
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        [$1], OBJC, [depcc="$OBJC" am_compiler_list='gcc3 gcc'],
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        [$1], GCJ,  [depcc="$GCJ"  am_compiler_list='gcc3 gcc'],
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                    [depcc="$$1"   am_compiler_list=])
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am_depcomp=$ac_aux_dir/depcomp
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AC_CACHE_CHECK([dependency style of $depcc],
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               [am_cv_$1_dependencies_compiler_type],
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[if test -f "$am_depcomp"; then
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  # We make a subdir and do the tests there.  Otherwise we can end up
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  # making bogus files that we don't know about and never remove.  For
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  # instance it was reported that on HP-UX the gcc test will end up
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  # making a dummy file named `D' -- because `-MD' means `put the output
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  # in D'.
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  mkdir conftest.dir
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  # Copy depcomp to subdir because otherwise we won't find it if we're
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  # using a relative directory.
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  cp "$am_depcomp" conftest.dir
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  cd conftest.dir
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  # We will build objects and dependencies in a subdirectory because
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  # it helps to detect inapplicable dependency modes.  For instance
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  # both Tru64's cc and ICC support -MD to output dependencies as a
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  # side effect of compilation, but ICC will put the dependencies in
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  # the current directory while Tru64 will put them in the object
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  # directory.
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  mkdir sub
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  am_cv_$1_dependencies_compiler_type=none
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  if test "$am_compiler_list" = ""; then
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     am_compiler_list=`sed -n ['s/^\([a-zA-Z0-9]*\))$/\1/p'] < ./depcomp`
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  fi
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  for depmode in $am_compiler_list; do
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    if test $depmode = none; then break; fi
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    _AS_ECHO([$as_me:$LINENO: trying $depmode], AS_MESSAGE_LOG_FD)
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    # Setup a source with many dependencies, because some compilers
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    # like to wrap large dependency lists on column 80 (with \), and
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    # we should not choose a depcomp mode which is confused by this.
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    #
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    # We need to recreate these files for each test, as the compiler may
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    # overwrite some of them when testing with obscure command lines.
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    # This happens at least with the AIX C compiler.
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    : > sub/conftest.c
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    for i in 1 2 3 4 5 6; do
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      echo '#include "conftst'$i'.h"' >> sub/conftest.c
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      # Using `: > sub/conftst$i.h' creates only sub/conftst1.h with
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      # Solaris 8's {/usr,}/bin/sh.
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      touch sub/conftst$i.h
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    done
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    echo "include sub/conftest.Po" > confmf
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    # We check with `-c' and `-o' for the sake of the "dashmstdout"
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    # mode.  It turns out that the SunPro C++ compiler does not properly
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    # handle `-M -o', and we need to detect this.
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    depcmd="depmode=$depmode \
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       source=sub/conftest.c object=sub/conftest.${OBJEXT-o} \
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       depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \
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       $SHELL ./depcomp $depcc -c -o sub/conftest.${OBJEXT-o} sub/conftest.c"
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    echo "| $depcmd" | sed -e 's/  */ /g' >&AS_MESSAGE_LOG_FD
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    if env $depcmd > conftest.err 2>&1 &&
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       grep sub/conftst6.h sub/conftest.Po >>conftest.err 2>&1 &&
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       grep sub/conftest.${OBJEXT-o} sub/conftest.Po >>conftest.err 2>&1 &&
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       ${MAKE-make} -s -f confmf >>conftest.err 2>&1; then
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      # icc doesn't choke on unknown options, it will just issue warnings
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      # or remarks (even with -Werror).  So we grep stderr for any message
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      # that says an option was ignored or not supported.
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      # When given -MP, icc 7.0 and 7.1 complain thusly:
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      #   icc: Command line warning: ignoring option '-M'; no argument required
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      # The diagnosis changed in icc 8.0:
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      #   icc: Command line remark: option '-MP' not supported
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      if (grep 'ignoring option' conftest.err ||
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          grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
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        am_cv_$1_dependencies_compiler_type=$depmode
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        _AS_ECHO([$as_me:$LINENO: success], AS_MESSAGE_LOG_FD)
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        break
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      fi
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    fi
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    _AS_ECHO([$as_me:$LINENO: failure, diagnostics are:], AS_MESSAGE_LOG_FD)
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    sed -e 's/^/| /' < conftest.err >&AS_MESSAGE_LOG_FD
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  done
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  cd ..
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  rm -rf conftest.dir
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else
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  am_cv_$1_dependencies_compiler_type=none
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fi
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])
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if test x${am_cv_$1_dependencies_compiler_type-none} = xnone
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then AC_MSG_ERROR([no usable dependency style found])
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else AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
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fi
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])
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# AM_SET_DEPDIR
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# -------------
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# Choose a directory name for dependency files.
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AC_DEFUN([AM_SET_DEPDIR],
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[AC_REQUIRE([AM_SET_LEADING_DOT])dnl
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AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
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])
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# ZW_CREATE_DEPDIR
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# ----------------
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# As AM_SET_DEPDIR, but also create the directory at config.status time.
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AC_DEFUN([ZW_CREATE_DEPDIR],
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[AC_REQUIRE([AM_SET_DEPDIR])dnl
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AC_CONFIG_COMMANDS([depdir], [$SHELL $ac_aux_dir/mkinstalldirs $DEPDIR],
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                             [ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])
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])

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