libobjc/configure.ac

   1 # Process this file with autoconf to produce a configure script.
   2 #   Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004
   3 #   Free Software Foundation, Inc.
   4 #   Originally contributed by Dave Love (d.love@dl.ac.uk).
   5 #
   6 #This file is part of GCC.
   7 #
   8 #GCC is free software; you can redistribute it and/or modify
   9 #it under the terms of the GNU General Public License as published by
  10 #the Free Software Foundation; either version 2, or (at your option)
  11 #any later version.
  12 #
  13 #GCC is distributed in the hope that it will be useful,
  14 #but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 #GNU General Public License for more details.
  17 #
  18 #You should have received a copy of the GNU General Public License
  19 #along with GCC; see the file COPYING.  If not, write to
  20 #the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  21 #02111-1307, USA.
  22
  23 AC_PREREQ(2.59)
  24 AC_INIT(package-unused, version-unused,, libobjc)
  25 AC_CONFIG_SRCDIR([objc/objc.h])
  26 GCC_TOPLEV_SUBDIRS
  27
  28 # We need the following definitions because AC_PROG_LIBTOOL relies on them
  29 PACKAGE=libobjc
  30 # Version is pulled out to make it a bit easier to change using sed.
  31 VERSION=1:0:0
  32 AC_SUBST(VERSION)
  33
  34 # This works around the fact that libtool configuration may change LD
  35 # for this particular configuration, but some shells, instead of
  36 # keeping the changes in LD private, export them just because LD is
  37 # exported.
  38 ORIGINAL_LD_FOR_MULTILIBS=$LD
  39
  40 # -------
  41 # Options
  42 # -------
  43
  44 # Default to --enable-multilib
  45 AC_ARG_ENABLE(multilib,
  46   [  --enable-multilib       build hella library versions (default)],
  47   [case "${enableval}" in
  48     yes) multilib=yes ;;
  49     no)  multilib=no ;;
  50     *)   AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
  51    esac],
  52   [multilib=yes])
  53
  54 # We use these options to decide which functions to include.
  55 AC_ARG_WITH(target-subdir,
  56 [  --with-target-subdir=SUBDIR
  57                            configuring in a subdirectory])
  58 AC_ARG_WITH(cross-host,
  59 [  --with-cross-host=HOST  configuring with a cross compiler])
  60
  61 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
  62 AC_ARG_ENABLE(version-specific-runtime-libs,
  63 [  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
  64 [case "$enableval" in
  65  yes) version_specific_libs=yes ;;
  66  no)  version_specific_libs=no ;;
  67  *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
  68  esac],
  69 [version_specific_libs=no])
  70 AC_MSG_RESULT($version_specific_libs)
  71
  72 AC_ARG_ENABLE(objc-gc,
  73 [  --enable-objc-gc       enable the use of Boehm's garbage collector with
  74                           the GNU Objective-C runtime.],
  75 [case $enable_objc_gc in
  76   no) OBJC_BOEHM_GC='' ;;
  77   *) OBJC_BOEHM_GC=libobjc_gc.la ;;
  78 esac],
  79 [OBJC_BOEHM_GC=''])
  80 AC_SUBST(OBJC_BOEHM_GC)
  81
  82 # -----------
  83 # Directories
  84 # -----------
  85
  86 # When building with srcdir == objdir, links to the source files will
  87 # be created in directories within the target_subdir.  We have to
  88 # adjust toplevel_srcdir accordingly, so that configure finds
  89 # install-sh and other auxiliary files that live in the top-level
  90 # source directory.
  91 if test "${srcdir}" = "."; then
  92   if test -z "${with_target_subdir}"; then
  93     toprel=".."
  94   else
  95     if test "${with_target_subdir}" != "."; then
  96       toprel="${with_multisrctop}../.."
  97     else
  98       toprel="${with_multisrctop}.."
  99     fi
 100   fi
 101 else
 102   toprel=".."
 103 fi
 104 AC_CONFIG_AUX_DIR(${srcdir}/$toprel)
 105 toplevel_srcdir=\${srcdir}/$toprel
 106 AC_SUBST(toplevel_srcdir)
 107
 108 AC_CANONICAL_SYSTEM
 109 ACX_NONCANONICAL_TARGET
 110
 111 # Export source directory.
 112 # These need to be absolute paths, yet at the same time need to
 113 # canonicalize only relative paths, because then amd will not unmount
 114 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
 115 case $srcdir in
 116   [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
 117   *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
 118 esac
 119 AC_SUBST(glibcpp_srcdir)
 120
 121 # Calculate toolexeclibdir
 122 # Also toolexecdir, though it's only used in toolexeclibdir
 123 case ${version_specific_libs} in
 124   yes)
 125     # Need the gcc compiler version to know where to install libraries
 126     # and header files if --enable-version-specific-runtime-libs option
 127     # is selected.
 128     toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
 129     toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
 130     ;;
 131   no)
 132     if test -n "$with_cross_host" &&
 133        test x"$with_cross_host" != x"no"; then
 134       # Install a library built with a cross compiler in tooldir, not libdir.
 135       toolexecdir='$(exec_prefix)/$(target_noncanonical)'
 136       toolexeclibdir='$(toolexecdir)/lib'
 137     else
 138       toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
 139       toolexeclibdir='$(libdir)'
 140     fi
 141     multi_os_directory=`$CC -print-multi-os-directory`
 142     case $multi_os_directory in
 143       .) ;; # Avoid trailing /.
 144       *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
 145     esac
 146     ;;
 147 esac
 148 AC_SUBST(toolexecdir)
 149 AC_SUBST(toolexeclibdir)
 150
 151 # Figure out if we want to name the include directory and the
 152 #  library name changes differently.
 153 includedirname=include
 154 libext=
 155 case "${host}" in
 156   *-darwin*)
 157     # Darwin is the only target so far that needs a different include directory.
 158     includedirname=include-gnu-runtime
 159     libext=-gnu
 160     ;;
 161 esac
 162 AC_SUBST(includedirname)
 163 AC_SUBST(libext)
 164
 165 AC_CONFIG_HEADERS(config.h)
 166
 167 # --------
 168 # Programs
 169 # --------
 170
 171 GCC_NO_EXECUTABLES
 172
 173 # We must force CC to /not/ be a precious variable; otherwise
 174 # the wrong, non-multilib-adjusted value will be used in multilibs.
 175 # As a side effect, we have to subst CFLAGS ourselves.
 176 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
 177 m4_define([_AC_ARG_VAR_PRECIOUS],[])
 178 AC_PROG_CC
 179 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
 180
 181 AC_SUBST(CFLAGS)
 182
 183 AC_CHECK_TOOL(AS, as)
 184 AC_CHECK_TOOL(AR, ar)
 185 AC_CHECK_TOOL(RANLIB, ranlib, :)
 186 AC_PROG_INSTALL
 187
 188 AM_MAINTAINER_MODE
 189
 190 # Enable Win32 DLL on MS Windows - FIXME
 191 AC_LIBTOOL_WIN32_DLL
 192
 193 AC_PROG_LIBTOOL
 194
 195 AM_PROG_CC_C_O
 196
 197 AC_PROG_MAKE_SET
 198
 199 # -------
 200 # Headers
 201 # -------
 202
 203 # Sanity check for the cross-compilation case:
 204 AC_CHECK_HEADER(stdio.h,:,
 205   [AC_MSG_ERROR([Can't find stdio.h.
 206 You must have a usable C system for the target already installed, at least
 207 including headers and, preferably, the library, before you can configure
 208 the Objective C runtime system.  If necessary, install gcc now with
 209 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
 210
 211 AC_HEADER_STDC
 212
 213 AC_CHECK_HEADERS(sched.h)
 214
 215 # -----------
 216 # Miscellanea
 217 # -----------
 218
 219 AC_MSG_CHECKING([for thread model used by GCC])
 220 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
 221 AC_MSG_RESULT([$target_thread_file])
 222
 223 if test $target_thread_file != single; then
 224   AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
 225         [Define if the compiler has a thread header that is non single.])
 226 fi
 227
 228
 229 AC_MSG_CHECKING([for exception model to use])
 230 AC_LANG_PUSH(C)
 231 AC_ARG_ENABLE(sjlj-exceptions,
 232   AS_HELP_STRING([--enable-sjlj-exceptions],
 233                  [force use of builtin_setjmp for exceptions]),
 234 [:],
 235 [dnl Botheration.  Now we've got to detect the exception model.
 236 dnl Link tests against libgcc.a are problematic since -- at least
 237 dnl as of this writing -- we've not been given proper -L bits for
 238 dnl single-tree newlib and libgloss.
 239 dnl
 240 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
 241 dnl conftest files before we got a change to grep them first.
 242 cat > conftest.$ac_ext << EOF
 243 [#]line __oline__ "configure"
 244 @interface Frob
 245 @end
 246 @implementation Frob
 247 @end
 248 int proc();
 249 int foo()
 250 {
 251   @try {
 252    return proc();
 253   }
 254   @catch (Frob* ex) {
 255     return 0;
 256   }
 257 }
 258 EOF
 259 old_CFLAGS="$CFLAGS"
 260 dnl work around that we don't have Objective-C support in autoconf
 261 CFLAGS="-x objective-c -fgnu-runtime -fobjc-exceptions -S"
 262 if AC_TRY_EVAL(ac_compile); then
 263   if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
 264     enable_sjlj_exceptions=yes
 265   elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
 266     enable_sjlj_exceptions=no
 267   fi
 268 fi
 269 CFLAGS="$old_CFLAGS"
 270 rm -f conftest*])
 271 if test x$enable_sjlj_exceptions = xyes; then
 272   AC_DEFINE(SJLJ_EXCEPTIONS, 1,
 273         [Define if the compiler is configured for setjmp/longjmp exceptions.])
 274   ac_exception_model_name=sjlj
 275 elif test x$enable_sjlj_exceptions = xno; then
 276   ac_exception_model_name="call frame"
 277 else
 278   AC_MSG_ERROR([unable to detect exception model])
 279 fi
 280 AC_LANG_POP(C)
 281 AC_MSG_RESULT($ac_exception_model_name)
 282
 283 # ------
 284 # Output
 285 # ------
 286
 287 AC_CONFIG_FILES([Makefile])
 288
 289 AC_CONFIG_COMMANDS([default],
 290 [[if test -n "$CONFIG_FILES"; then
 291   if test -n "${with_target_subdir}"; then
 292     # FIXME: We shouldn't need to set ac_file
 293     ac_file=Makefile
 294     LD="${ORIGINAL_LD_FOR_MULTILIBS}"
 295     . ${toplevel_srcdir}/config-ml.in
 296   fi
 297 fi]],
 298 [[srcdir=${srcdir}
 299 host=${host}
 300 target=${target}
 301 with_target_subdir=${with_target_subdir}
 302 with_multisubdir=${with_multisubdir}
 303 ac_configure_args="--enable-multilib ${ac_configure_args}"
 304 toplevel_srcdir=${toplevel_srcdir}
 305 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 306 ORIGINAL_LD_FOR_MULTILIBS="${ORIGINAL_LD_FOR_MULTILIBS}"
 307 ]])
 308
 309 AC_OUTPUT