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## -*- 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.
# -----------------------------
# 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.
[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=])
AC_CACHE_CHECK([dependency style of $depcc],
[if test -f "$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 "$am_depcomp" conftest.dir
cd conftest.dir
# We will build objects and dependencies in a subdirectory because
# it helps to detect inapplicable dependency modes. For instance
# both Tru64's cc and ICC support -MD to output dependencies as a
# side effect of compilation, but ICC will put the dependencies in
# the current directory while Tru64 will put them in the object
# directory.
mkdir sub
if test "$am_compiler_list" = ""; then
am_compiler_list=`sed -n ['s/^\([a-zA-Z0-9]*\))$/\1/p'] < ./depcomp`
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$i.h
echo "include sub/conftest.Po" > confmf
# We check with `-c' and `-o' for the sake of the "dashmstdout"
# mode. It turns out that the SunPro C++ compiler does not properly
# handle `-M -o', and we need to detect this.
depcmd="depmode=$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 &&
${MAKE-make} -s -f confmf >>conftest.err 2>&1; then
# icc doesn't choke on unknown options, it will just issue warnings
# or remarks (even with -Werror). So we grep stderr for any message
# that says an option was ignored or not supported.
# When given -MP, icc 7.0 and 7.1 complain thusly:
# icc: Command line warning: ignoring option '-M'; no argument required
# The diagnosis changed in icc 8.0:
# icc: Command line remark: option '-MP' not supported
if (grep 'ignoring option' conftest.err ||
grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else
_AS_ECHO([$as_me:$LINENO: success], AS_MESSAGE_LOG_FD)
_AS_ECHO([$as_me:$LINENO: failure, diagnostics are:], AS_MESSAGE_LOG_FD)
sed -e 's/^/| /' < conftest.err >&AS_MESSAGE_LOG_FD
cd ..
rm -rf conftest.dir
if test x${am_cv_$1_dependencies_compiler_type-none} = xnone
then AC_MSG_ERROR([no usable dependency style found])
else AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type])
# -------------
# Choose a directory name for dependency files.
AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl
# ----------------
# As AM_SET_DEPDIR, but also create the directory at config.status time.
AC_CONFIG_COMMANDS([depdir], [$SHELL $ac_aux_dir/mkinstalldirs $DEPDIR],
[ac_aux_dir=$ac_aux_dir DEPDIR=$DEPDIR])