diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 277 |
1 files changed, 241 insertions, 36 deletions
diff --git a/configure.ac b/configure.ac index e51e497..f206924 100644 --- a/configure.ac +++ b/configure.ac @@ -1,4 +1,5 @@ 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 @@ -15,72 +16,276 @@ 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_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 output var `systype' from configuration parms. +# Deduce the output variable `systype' from the configuration parameters. # -AC_CANONICAL_HOST - -case "$host_cpu" in -i[[3456]]86) systype=i386 ;; -*) AC_MSG_ERROR([unsupported CPU type]) ;; -esac -AC_SUBST([systype]) +AC_CANONICAL_HOST -# Default prefix is / for the kernel. -AC_PREFIX_DEFAULT([]) +m4_define([set_HOST], [[ + case $host_cpu in + $2)] AM_CONDITIONAL([HOST_$1], [true]) [ + systype=$1;; + *)] AM_CONDITIONAL([HOST_$1], [false]) [;; + esac +]]) -# -# Options -# -AC_ARG_ENABLE([kdb], -AS_HELP_STRING([--enable-kdb], [enable use of in-kernel debugger])) -[if test x"$enable_kdb" = xyes; then] - AC_DEFINE([MACH_KDB], [1], [enable use of in-kernel debugger]) -[fi] +[systype=unsupported] +# Our supported architectures. +set_HOST([i386],[i?86]) -AC_ARG_ENABLE([kmsg], -AS_HELP_STRING([--disable-kmsg], [disable use of kmsg device])) -[if test x"$enable_kmsg" != xno; then] - AC_DEFINE([MACH_KMSG], [], [enable use of kmsg device]) +[if test -f "$srcdir"/"$systype"/Makefrag.am; then :; else] + AC_MSG_ERROR([unsupported CPU type $host_cpu]) [fi] +AC_SUBST([systype]) + # -# Programs +# Programs. # -AC_PROG_INSTALL AC_PROG_AWK +AM_PROG_AS AC_PROG_CC AC_PROG_CPP +AC_PROG_INSTALL AC_PROG_RANLIB - AC_CHECK_TOOL([AR], [ar]) AC_CHECK_TOOL([LD], [ld]) AC_CHECK_TOOL([NM], [nm]) -AC_CHECK_TOOL([STRIP], [strip]) AC_CHECK_TOOL([MIG], [mig], [mig]) -AC_CHECK_PROG([GZIP], [gzip], [gzip], false) -AC_CHECK_PROG([MBCHK], [mbchk], [mbchk], :) +dnl Needed for the Automake option `subdir-objects'. +AM_PROG_CC_C_O + +dnl Makerules can make use of these. +AC_CHECK_PROG([GZIP], [gzip], [gzip], [gzip-not-found]) +AC_CHECK_TOOL([STRIP], [strip]) + +dnl See below why we need to patch stuff during build... +AC_CHECK_PROG([PATCH], [patch], [patch], [patch-not-found]) + +# +# configure fragments. +# + +# The test suite. +m4_include([tests/configfrag.ac]) + +# General options. +m4_include([configfrag.ac]) + +# Machine-specific configuration. + +# i386. +[if [ "$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 <http://lists.gnu.org/archive/html/automake/2006-05/msg00038.html>. +# +# 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 <$PACKAGE_BUGREPORT>.]) + [fi +]) + -AC_CONFIG_SUBDIRS([linux]) +# +# Makefile.correct_output_files_for_.S_files.patch +# +# The used version of Automake might emit rules that don't put compiled (pre +# processed) Assembler files where they belong. We're bitten by this bug +# because we use the Automake option `subdir-objects', to not clutter the main +# build directory with all the object files. The problem is that the emitted +# rules will place those in the main build directory, but later, when creating +# the libraries, look for them in the subdirectories. +# +# See <http://sourceware.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=automake&pr=492>. +# +# Another note: even with versions of Automake that don't have this issue +# fixed, a correct rule is emitted for linux/src/arch/i386/lib/semaphore.S, see +# the comment by Thomas Schwinge on 2006-10-10 on the above bug report. +# +# Again, a real patch is being used here and not some `sed' magic, so that +# it'll fail loudly in case some internals we're relying on are changed. +# -# Do machine-specific configuration last so that it can override anything -# set above if necessary. -if test "$systype" = i386; then - AC_CONFIG_SUBDIRS([i386]) -fi +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_CONFIG_FILES([Makefile Makerules version.c doc/Makefile]) AC_OUTPUT |