Edit
kc3-lang/automake/m4/depend.m4
Tom Tromey
- m4/depend.m4
-
# serial 3 # 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" or "OBJC". # We try a few techniques and use that to set a single cache variable. AC_DEFUN([AM_DEPENDENCIES], [AC_REQUIRE([AM_SET_DEPDIR])dnl AC_REQUIRE([AM_OUTPUT_DEPENDENCY_COMMANDS])dnl am_compiler_list= ifelse([$1], CC, [AC_REQUIRE([AC_PROG_][CC])dnl AC_REQUIRE([AC_PROG_][CPP]) depcc="$CC" depcpp="$CPP"], [$1], CXX, [AC_REQUIRE([AC_PROG_][CXX])dnl AC_REQUIRE([AC_PROG_][CXXCPP]) depcc="$CXX" depcpp="$CXXCPP"], [$1], OBJC, [am_compiler_list='gcc3 gcc' depcc="$OBJC" depcpp=""], [$1], GCJ, [am_compiler_list='gcc3 gcc' depcc="$GCJ" depcpp=""], [AC_REQUIRE([AC_PROG_][$1])dnl depcc="$$1" depcpp=""]) AC_REQUIRE([AM_MAKE_INCLUDE]) AC_REQUIRE([AM_DEP_TRACK]) AC_CACHE_CHECK([dependency style of $depcc], [am_cv_$1_dependencies_compiler_type], [if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then # We make a subdir and do the tests there. Otherwise we can end up # making bogus files that we don't know about and never remove. For # instance it was reported that on HP-UX the gcc test will end up # making a dummy file named `D' -- because `-MD' means `put the output # in D'. mkdir confdir # Copy depcomp to subdir because otherwise we won't find it if we're # using a relative directory. cp "$am_depcomp" confdir cd confdir 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 $am_compiler_list; do # We need to recreate these files for each test, as the compiler may # overwrite some of them when testing with obscure command lines. # This happens at least with the AIX C compiler. echo '#include "conftest.h"' > conftest.c echo 'int i;' > conftest.h case "$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=conftest.c object=conftest.o \ depfile=conftest.Po tmpdepfile=conftest.TPo \ $SHELL ./depcomp $depcc -c conftest.c -o conftest.o >/dev/null 2>&1 && grep conftest.h conftest.Po > /dev/null 2>&1; then am_cv_$1_dependencies_compiler_type="$depmode" break fi done cd .. rm -rf confdir else am_cv_$1_dependencies_compiler_type=none fi ]) $1DEPMODE="depmode=$am_cv_$1_dependencies_compiler_type" AC_SUBST([$1DEPMODE]) ]) # AM_SET_DEPDIR # ------------- # Choose a directory name for dependency files. # This macro is AC_REQUIREd in AM_DEPENDENCIES AC_DEFUN([AM_SET_DEPDIR], [if test -d .deps || mkdir .deps 2> /dev/null || test -d .deps; then DEPDIR=.deps # We redirect because .deps might already exist and be populated. # In this situation we don't want to see an error. rmdir .deps > /dev/null 2>&1 else DEPDIR=_deps fi AC_SUBST(DEPDIR) ]) # AM_DEP_TRACK # ------------ AC_DEFUN([AM_DEP_TRACK], [AC_ARG_ENABLE(dependency-tracking, [ --disable-dependency-tracking Speeds up one-time builds --enable-dependency-tracking Do not reject slow dependency extractors]) if test "x$enable_dependency_tracking" != xno; then am_depcomp="$ac_aux_dir/depcomp" AMDEPBACKSLASH='\' fi AM_CONDITIONAL([AMDEP], [test "x$enable_dependency_tracking" != xno]) pushdef([subst], defn([AC_SUBST])) subst(AMDEPBACKSLASH) popdef([subst]) ])