dnl Configure script for GNU Mach. dnl Copyright 1997, 1998, 1999, 2004, 2006 Free Software Foundation, Inc. dnl Permission to use, copy, modify and distribute this software and its dnl documentation is hereby granted, provided that both the copyright dnl notice and this permission notice appear in all copies of the dnl software, derivative works or modified versions, and any portions dnl thereof, and that both notices appear in supporting documentation. dnl dnl THE FREE SOFTWARE FOUNDATION ALLOWS FREE USE OF THIS SOFTWARE IN ITS dnl "AS IS" CONDITION. THE FREE SOFTWARE FOUNDATION DISCLAIMS ANY dnl LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE dnl USE OF THIS SOFTWARE. AC_PREREQ([2.57]) m4_include([version.m4]) AC_INIT([AC_PACKAGE_NAME], [AC_PACKAGE_VERSION], [AC_PACKAGE_BUGREPORT], [AC_PACKAGE_TARNAME]) AC_CONFIG_SRCDIR([kern/ipc_kobject.c]) AC_CONFIG_AUX_DIR([build-aux]) dnl Do not clutter the main build directory. AM_INIT_AUTOMAKE([subdir-objects]) # # Deduce the output variable `systype' from the configuration parameters. # AC_CANONICAL_HOST m4_define([set_HOST], [[ case $host_cpu in $2)] AM_CONDITIONAL([HOST_$1], [true]) [ systype=$1;; *)] AM_CONDITIONAL([HOST_$1], [false]) [;; esac ]]) [systype=unsupported] # Our supported architectures. set_HOST([i386],[i?86]) [if test -f "$srcdir"/"$systype"/Makefrag.am; then :; else] AC_MSG_ERROR([unsupported CPU type $host_cpu]) [fi] AC_SUBST([systype]) # # Programs. # AC_PROG_AWK AM_PROG_AS AC_PROG_CC AC_PROG_CPP AC_PROG_INSTALL AC_PROG_RANLIB AC_CHECK_TOOL([AR], [ar]) AC_CHECK_TOOL([LD], [ld]) AC_CHECK_TOOL([NM], [nm]) AC_CHECK_TOOL([MIG], [mig], [mig]) dnl Needed for the Automake option `subdir-objects'. AM_PROG_CC_C_O dnl Makerules can make use of these. AC_CHECK_PROG([GZIP], [gzip], [gzip], [gzip-not-found]) AC_CHECK_TOOL([STRIP], [strip]) dnl See below why we need to patch stuff during build... AC_CHECK_PROG([PATCH], [patch], [patch], [patch-not-found]) # # configure fragments. # # The test suite. m4_include([tests/configfrag.ac]) # General options. m4_include([configfrag.ac]) # Machine-specific configuration. # i386. [if [ "$systype" = i386 ]; then] m4_include([i386/configfrag.ac]) [fi] # Linux code snarfed into GNU Mach. dnl Strictly speaking, we could have a `linux' option too, but it's currently dnl not possible to built a useful kernel without at least one Linux driver, so dnl that's not really necessary. dnl dnl The following doesn't work because of ``configure: error: conditional dnl "device_driver_floppy" was never defined.''. dnl AC_ARG_ENABLE([linux-device-drivers], dnl AS_HELP_STRING([--disable-linux-device-drivers], dnl [disable any use of Linux's device drivers])) dnl [if [ x"$enable_linux_device_drivers" != xno ]; then] m4_include([linux/configfrag.ac]) dnl [fi] # # Output. # # Set up `machine' and `mach/machine' links in the build directory for easier # header file location. AC_CONFIG_LINKS([machine:${systype}/${systype} mach/machine:${systype}/include/mach/${systype}]) AC_CONFIG_HEADER([config.h]) AC_CONFIG_FILES([Makefile version.c]) # # The remaining ugly, dark corners... # # Attention, parents: don't show this to your children... # # # config.status.dep.patch # # This is a (ugly --- I admit) bootstrap hack to get to-be-generated files # created before any other source files are compiled. # # See . # # We don't use `BUILT_SOURCES' (as it was suggested in the follow-up message), # as we also want things like `make SPECIFIC_TARGET' to work. # # This affair is especially ugly because internals are used (the `# dummy' # tag): internals that may be subject to changes. That's the reason why a # real patch is being used here and not some `sed' magic: to make it fail # loudly in case. # # For all source files create dependency files where it is stated that the # Makefile depends on all to-be-generated files. Later, when compiling the # source files, these dependency files will be rewritten to contain the files's # actual dependencies. From then on this hack will be forgotten. The choice # of the Makefile as the file to depends on is not be the best one, because # when running `make clean', the build system may decide to first build all the # to-be-genereated files and afterwards remove them again, but it works and I # don't want to spend more thoughts on this issue at the moment. Feel free to # suggest something better. # dnl AC_CONFIG_COMMANDS_POST([ dnl sed -i -e \ dnl 's%#\ dummy%Makefile: $(filter-out $(DIST_SOURCES),$(SOURCES))%' \ dnl config.status dnl ]) AC_CONFIG_COMMANDS_POST([ if "$PATCH" -f < "$srcdir"/config.status.dep.patch then] AC_MSG_NOTICE([Applied a patch to work around a deficiency in] [Automake. See `configure.ac' for details.]) [else] AC_MSG_ERROR([failed to patch using `config.status.dep.patch'.] [You have a serious problem. Please contact <$PACKAGE_BUGREPORT>.]) [fi ]) # # Makefile.correct_output_files_for_.S_files.patch # # The used version of Automake might emit rules that don't put compiled (pre # processed) Assembler files where they belong. We're bitten by this bug # because we use the Automake option `subdir-objects', to not clutter the main # build directory with all the object files. The problem is that the emitted # rules will place those in the main build directory, but later, when creating # the libraries, look for them in the subdirectories. # # See . # # Another note: even with versions of Automake that don't have this issue # fixed, a correct rule is emitted for linux/src/arch/i386/lib/semaphore.S, see # the comment by Thomas Schwinge on 2006-10-10 on the above bug report. # # Again, a real patch is being used here and not some `sed' magic, so that # it'll fail loudly in case some internals we're relying on are changed. # AC_CONFIG_COMMANDS([frob_Makefile_for_correct_output_files_for_.S_files],[ # Do we have a version of Automake that doesn't have this bug? if grep -q CPPASCOMPILE.\*-c.\*-o < "$srcdir"/Makefile.in then] AC_MSG_NOTICE([... not a problem with the used version of Automake.]) [# We don't. elif "$PATCH" -f \ < "$srcdir"/Makefile.correct_output_files_for_.S_files.patch then] AC_MSG_NOTICE([Applied a patch to fix a bug in your version of Automake.] [The applied fix should work in most cases. You could also consider] [updating to Automake 1.10 (once it is released) or better.]) [else] AC_MSG_ERROR([failed to patch using ] [`Makefile.correct_output_files_for_.S_files.patch'.] [You have a serious problem. Please contact <$PACKAGE_BUGREPORT>.]) [fi ],[ PACKAGE_BUGREPORT=$PACKAGE_BUGREPORT PATCH=$PATCH ]) # # Makefile.dependency_tracking_for_.S_files.patch # # The used version of Automake might not support automatic dependency tracking # for (preprocessed) Assembler source files. We might add such support here. # But since adding such support is nontrivial and the nonexistent dependency # tracking (missing only for .S files) is not considered a fundamental problem, # we save the costs of adding such support here. You should instead consider # updating to Automake 1.10 (once it is released) or better. # AC_CONFIG_COMMANDS([frob_Makefile_for_dependency_tracking_for_.S_files],[ # Do we have a version of Automake that doesn't have this bug? if grep -q CPPASCOMPILE.\*depbase < "$srcdir"/Makefile.in then] AC_MSG_NOTICE([... not a problem with the used version of Automake.]) [# We don't. else] AC_MSG_NOTICE([Your build of GNU Mach won't have dependency tracking for] [(preprocessed) Assembler source files. Consider updating to Automake] [1.10 (once it is released) or better if you need such support.]) dnl In case someone feels like completing this instead of simply using a fixed dnl version of Automake... dnl if "$PATCH" -f; then :; else] dnl AC_MSG_ERROR([failed to patch using] dnl [`Makefile.dependency_tracking_for_.S_files.patch'.] dnl [You have a serious problem. Please contact <$PACKAGE_BUGREPORT>.]) dnl [fi < "$srcdir"/Makefile.dependency_tracking_for_.S_files.patch dnl dnl # Change the Makefile to care for dependencies of .S files. dnl ( cd "$srcdir"/ && dnl find ./ -name \*.S ) | \ dnl sed -e 's%^\./%%' -e 's%\.S$%%' -e 's%^\(.*\)/%\1 %' | \ dnl while read d f; do dnl echo && dnl echo "$d"/"$f"'.$(OBJEXT): '"$d"'/$(am__dirstamp) ' \ dnl "$d"'/$(DEPDIR)/$(am__dirstamp)' && dnl echo 'include '"$d"'/$(DEPDIR)/'"$f"'.Po' && dnl dnl # Create the dependency files if they don't exist so far. dnl if test -f "$d"/"$DEPDIR"/"$f"'.Po'; then :; else dnl echo '# dummy' > "$d"/"$DEPDIR"/"$f"'.Po' dnl fi dnl done >> Makefile dnl dnl TODO. linux/src/arch/i386/lib/.deps/liblinux_a-semaphore.Po vs. dnl linux/src/arch/i386/lib/.deps/semaphore.Po. Because of the above dnl mentioned special rule for `semaphore.S' the .S.o rule is not used. dnl dnl gcc -nostdinc -imacros config.h -Ii386 -I. -I../i386 -I../include -I../i386/include/mach/sa -DASSEMBLER -g -O2 -c ../i386/i386at/boothdr.S dnl dnl Makefile dnl dnl COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) dnl .c.o: dnl depbase=`echo $@ | sed 's|[^/]*$$|$(DEPDIR)/&|;s|\.o$$||'`; \ dnl if $(COMPILE) -MT $@ -MD -MP -MF "$$depbase.Tpo" -c -o $@ $<; \ dnl then mv -f "$$depbase.Tpo" "$$depbase.Po"; else rm -f "$$depbase.Tpo"; exit 1; fi dnl # source='$<' object='$@' libtool=no \ dnl # DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) \ dnl # $(COMPILE) -c -o $@ $< dnl dnl CCAS = gcc dnl CCASCOMPILE = $(CCAS) $(AM_CCASFLAGS) $(CCASFLAGS) dnl .S.o: dnl $(CCASCOMPILE) -c $< dnl dnl source=../i386/i386at/boothdr.S object=i386/i386at/boothdr.o libtool=no DEPDIR=.deps depmode=gcc3 ../depcomp gcc -nostdinc -imacros config.h -Ii386 -I. -I../i386 -I../include -I../i386/include/mach/sa -DASSEMBLER -g -O2 -c -o i386/i386at/boothdr.o ../i386/i386at/boothdr.S dnl ... creates a correct i386/i386at/.deps/boothdr.Po. [fi dnl ],[ dnl DEPDIR=$DEPDIR dnl PACKAGE_BUGREPORT=$PACKAGE_BUGREPORT dnl PATCH=$PATCH ]) # # Fire. # AC_OUTPUT