Edit
kc3-lang/automake/m4/depend.m4
Alexandre Duret-Lutz
- m4/depend.m4
-
# serial 7 -*- Autoconf -*- # Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004 # Free Software Foundation, Inc. # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA # 02111-1307, USA. # There are a few dirty hacks below to avoid letting `AC_PROG_CC' be # written in clear, in which case automake, when reading aclocal.m4, # will think it sees a *use*, and therefore will trigger all it's # C support machinery. Also note that it means that autoscan, seeing # CC etc. in the Makefile, will ask for an AC_PROG_CC use... # _AM_DEPENDENCIES(NAME) # ---------------------- # See how the compiler implements dependency checking. # NAME is "CC", "CXX", "GCJ", or "OBJC". # We try a few techniques and use that to set a single cache variable. # # We don't AC_REQUIRE the corresponding AC_PROG_CC since the latter was # modified to invoke _AM_DEPENDENCIES(CC); we would have a circular # dependency, and given that the user is not expected to run this macro, # just rely on AC_PROG_CC. AC_DEFUN([_AM_DEPENDENCIES], [AC_REQUIRE([AM_SET_DEPDIR])dnl AC_REQUIRE([AM_OUTPUT_DEPENDENCY_COMMANDS])dnl AC_REQUIRE([AM_MAKE_INCLUDE])dnl AC_REQUIRE([AM_DEP_TRACK])dnl 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], [am_cv_$1_dependencies_compiler_type], [if test -z "$AMDEP_TRUE" && 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 # 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$i.h done echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf case $depmode in nosideeffect) # after this tag, mechanisms are not by side-effect, so they'll # only be used when explicitly requested if test "x$enable_dependency_tracking" = xyes; then continue else break fi ;; none) break ;; esac # 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. if 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 \ >/dev/null 2>conftest.err && grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 && grep sub/conftest.${OBJEXT-o} sub/conftest.Po > /dev/null 2>&1 && ${MAKE-make} -s -f confmf > /dev/null 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 break fi fi done cd .. rm -rf conftest.dir else am_cv_$1_dependencies_compiler_type=none fi ]) AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type]) AM_CONDITIONAL([am__fastdep$1], [ test "x$enable_dependency_tracking" != xno \ && test "$am_cv_$1_dependencies_compiler_type" = gcc3]) ]) # AM_SET_DEPDIR # ------------- # Choose a directory name for dependency files. # This macro is AC_REQUIREd in _AM_DEPENDENCIES AC_DEFUN([AM_SET_DEPDIR], [AC_REQUIRE([AM_SET_LEADING_DOT])dnl AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl ]) # AM_DEP_TRACK # ------------ AC_DEFUN([AM_DEP_TRACK], [AC_ARG_ENABLE(dependency-tracking, [ --disable-dependency-tracking speeds up one-time build --enable-dependency-tracking do not reject slow dependency extractors]) if test "x$enable_dependency_tracking" != xno; then am_depcomp="$ac_aux_dir/depcomp" AMDEPBACKSLASH='\' fi AM_CONDITIONAL([AMDEP], [test "x$enable_dependency_tracking" != xno]) AC_SUBST([AMDEPBACKSLASH]) ])