libobjc/configure.ac

   1 # Process this file with autoconf to produce a configure script.
   2 #   Copyright (C) 1994-2014 Free Software Foundation, Inc.
   3 #   Originally contributed by Dave Love (d.love@dl.ac.uk).
   4 #
   5 #This file is part of GCC.
   6 #
   7 #GCC is free software; you can redistribute it and/or modify
   8 #it under the terms of the GNU General Public License as published by
   9 #the Free Software Foundation; either version 3, or (at your option)
  10 #any later version.
  11 #
  12 #GCC is distributed in the hope that it will be useful,
  13 #but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 #GNU General Public License for more details.
  16 #
  17 #You should have received a copy of the GNU General Public License
  18 #along with GCC; see the file COPYING3.  If not see
  19 #<http://www.gnu.org/licenses/>.
  20
  21 AC_PREREQ(2.64)
  22 AC_INIT(package-unused, version-unused,, libobjc)
  23 AC_CONFIG_SRCDIR([objc/objc.h])
  24 GCC_TOPLEV_SUBDIRS
  25
  26 # We need the following definitions because AC_PROG_LIBTOOL relies on them
  27 PACKAGE=libobjc
  28 # Version is pulled out to make it a bit easier to change using sed.
  29 VERSION=4:0:0
  30 AC_SUBST(VERSION)
  31
  32 # This works around the fact that libtool configuration may change LD
  33 # for this particular configuration, but some shells, instead of
  34 # keeping the changes in LD private, export them just because LD is
  35 # exported.
  36 ORIGINAL_LD_FOR_MULTILIBS=$LD
  37
  38 # -------
  39 # Options
  40 # -------
  41
  42 # We use these options to decide which functions to include.
  43 AC_ARG_WITH(target-subdir,
  44 [  --with-target-subdir=SUBDIR
  45                            configuring in a subdirectory])
  46 AC_ARG_WITH(cross-host,
  47 [  --with-cross-host=HOST  configuring with a cross compiler])
  48
  49 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
  50 AC_ARG_ENABLE(version-specific-runtime-libs,
  51 [  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
  52 [case "$enableval" in
  53  yes) version_specific_libs=yes ;;
  54  no)  version_specific_libs=no ;;
  55  *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
  56  esac],
  57 [version_specific_libs=no])
  58 AC_MSG_RESULT($version_specific_libs)
  59
  60 AC_ARG_ENABLE(objc-gc,
  61 [  --enable-objc-gc       enable the use of Boehm's garbage collector with
  62                           the GNU Objective-C runtime.],
  63 [case $enable_objc_gc in
  64   no)
  65     OBJC_GCFLAGS=''
  66     OBJC_BOEHM_GC=''
  67     OBJC_BOEHM_GC_INCLUDES=''
  68     ;;
  69   *)
  70     OBJC_GCFLAGS='-DOBJC_WITH_GC=1'
  71     OBJC_BOEHM_GC='libobjc_gc$(libsuffix).la'
  72     OBJC_BOEHM_GC_INCLUDES='-I$(top_srcdir)/../boehm-gc/include -I../boehm-gc/include'
  73     ;;
  74 esac],
  75 [OBJC_GCFLAGS=''; OBJC_BOEHM_GC=''; OBJC_BOEHM_GC_INCLUDES=''])
  76 AC_SUBST(OBJC_GCFLAGS)
  77 AC_SUBST(OBJC_BOEHM_GC)
  78 AC_SUBST(OBJC_BOEHM_GC_INCLUDES)
  79
  80 # -----------
  81 # Directories
  82 # -----------
  83
  84 # Find the rest of the source tree framework.
  85 AM_ENABLE_MULTILIB(, ..)
  86
  87 AC_CANONICAL_SYSTEM
  88 ACX_NONCANONICAL_TARGET
  89
  90 # Export source directory.
  91 # These need to be absolute paths, yet at the same time need to
  92 # canonicalize only relative paths, because then amd will not unmount
  93 # drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
  94 case $srcdir in
  95   [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
  96   *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
  97 esac
  98 AC_SUBST(glibcpp_srcdir)
  99
 100 # Calculate toolexeclibdir
 101 # Also toolexecdir, though it's only used in toolexeclibdir
 102 case ${version_specific_libs} in
 103   yes)
 104     # Need the gcc compiler version to know where to install libraries
 105     # and header files if --enable-version-specific-runtime-libs option
 106     # is selected.
 107     toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
 108     toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
 109     ;;
 110   no)
 111     if test -n "$with_cross_host" &&
 112        test x"$with_cross_host" != x"no"; then
 113       # Install a library built with a cross compiler in tooldir, not libdir.
 114       toolexecdir='$(exec_prefix)/$(target_noncanonical)'
 115       toolexeclibdir='$(toolexecdir)/lib'
 116     else
 117       toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
 118       toolexeclibdir='$(libdir)'
 119     fi
 120     multi_os_directory=`$CC -print-multi-os-directory`
 121     case $multi_os_directory in
 122       .) ;; # Avoid trailing /.
 123       *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
 124     esac
 125     ;;
 126 esac
 127 AC_SUBST(toolexecdir)
 128 AC_SUBST(toolexeclibdir)
 129
 130 # Figure out if we want to name the include directory and the
 131 #  library name changes differently.
 132 includedirname=include
 133 libsuffix=
 134 case "${host}" in
 135   *-darwin*)
 136     # Darwin is the only target so far that needs a different include directory.
 137     includedirname=include-gnu-runtime
 138     libsuffix=-gnu
 139     ;;
 140 esac
 141 AC_SUBST(includedirname)
 142 AC_SUBST(libsuffix)
 143
 144 AC_CONFIG_HEADERS(config.h)
 145
 146 # --------
 147 # Programs
 148 # --------
 149
 150 GCC_NO_EXECUTABLES
 151
 152 # We must force CC to /not/ be a precious variable; otherwise
 153 # the wrong, non-multilib-adjusted value will be used in multilibs.
 154 # As a side effect, we have to subst CFLAGS ourselves.
 155 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
 156 m4_define([_AC_ARG_VAR_PRECIOUS],[])
 157 AC_PROG_CC
 158 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
 159
 160 # extra LD Flags which are required for targets
 161 ACX_LT_HOST_FLAGS
 162 case "${host}" in
 163   *-darwin*)
 164     # Darwin needs -single_module when linking libobjc
 165     extra_ldflags_libobjc='$(lt_host_flags) -Wl,-single_module'
 166     ;;
 167   *-cygwin*|*-mingw*)
 168     # Tell libtool to build DLLs on Windows
 169     extra_ldflags_libobjc='$(lt_host_flags)'
 170     ;;
 171 esac
 172 AC_SUBST(extra_ldflags_libobjc)
 173
 174 AC_SUBST(CFLAGS)
 175
 176 AC_CHECK_TOOL(AS, as)
 177 AC_CHECK_TOOL(AR, ar)
 178 AC_CHECK_TOOL(RANLIB, ranlib, :)
 179 AC_PROG_INSTALL
 180
 181 AM_MAINTAINER_MODE
 182
 183 # Enable Win32 DLL on MS Windows - FIXME
 184 AC_LIBTOOL_WIN32_DLL
 185
 186 AC_PROG_LIBTOOL
 187
 188 AM_PROG_CC_C_O
 189
 190 AC_PROG_MAKE_SET
 191
 192 # -------
 193 # Headers
 194 # -------
 195
 196 # Sanity check for the cross-compilation case:
 197 AC_CHECK_HEADER(stdio.h,:,
 198   [AC_MSG_ERROR([Can't find stdio.h.
 199 You must have a usable C system for the target already installed, at least
 200 including headers and, preferably, the library, before you can configure
 201 the Objective C runtime system.  If necessary, install gcc now with
 202 \`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
 203
 204 AC_HEADER_STDC
 205
 206 AC_CHECK_HEADERS(sched.h)
 207
 208 # -----------
 209 # Miscellanea
 210 # -----------
 211
 212 # Check if we have thread-local storage
 213 GCC_CHECK_TLS
 214
 215 AC_MSG_CHECKING([for exception model to use])
 216 AC_LANG_PUSH(C)
 217 AC_ARG_ENABLE(sjlj-exceptions,
 218   AS_HELP_STRING([--enable-sjlj-exceptions],
 219                  [force use of builtin_setjmp for exceptions]),
 220 [:],
 221 [dnl Botheration.  Now we've got to detect the exception model.
 222 dnl Link tests against libgcc.a are problematic since -- at least
 223 dnl as of this writing -- we've not been given proper -L bits for
 224 dnl single-tree newlib and libgloss.
 225 dnl
 226 dnl This is what AC_TRY_COMPILE would do if it didn't delete the
 227 dnl conftest files before we got a change to grep them first.
 228 cat > conftest.$ac_ext << EOF
 229 [#]line __oline__ "configure"
 230 @interface Frob
 231 @end
 232 @implementation Frob
 233 @end
 234 int proc();
 235 int foo()
 236 {
 237   @try {
 238    return proc();
 239   }
 240   @catch (Frob* ex) {
 241     return 0;
 242   }
 243 }
 244 EOF
 245 old_CFLAGS="$CFLAGS"
 246 dnl work around that we don't have Objective-C support in autoconf
 247 CFLAGS="-x objective-c -fgnu-runtime -fobjc-exceptions -S"
 248 if AC_TRY_EVAL(ac_compile); then
 249   if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
 250     enable_sjlj_exceptions=yes
 251   elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
 252     enable_sjlj_exceptions=no
 253   fi
 254 fi
 255 CFLAGS="$old_CFLAGS"
 256 rm -f conftest*])
 257 if test x$enable_sjlj_exceptions = xyes; then
 258   AC_DEFINE(SJLJ_EXCEPTIONS, 1,
 259         [Define if the compiler is configured for setjmp/longjmp exceptions.])
 260   ac_exception_model_name=sjlj
 261 elif test x$enable_sjlj_exceptions = xno; then
 262   ac_exception_model_name="call frame"
 263 else
 264   AC_MSG_ERROR([unable to detect exception model])
 265 fi
 266 AC_LANG_POP(C)
 267 AC_MSG_RESULT($ac_exception_model_name)
 268
 269 # ------
 270 # Output
 271 # ------
 272
 273 if test ${multilib} = yes; then
 274   multilib_arg="--enable-multilib"
 275 else
 276   multilib_arg=
 277 fi
 278
 279 AC_CONFIG_FILES([Makefile])
 280 AC_OUTPUT