Centralize PICFLAG configuration

[thirdparty/gcc.git] / libada / configure.ac

# Configure script for libada.
#   Copyright 2003, 2004, 2009, 2011 Free Software Foundation, Inc.
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING3.  If not see
# <http://www.gnu.org/licenses/>.

sinclude(../config/acx.m4)
sinclude(../config/multi.m4)
sinclude(../config/override.m4)
sinclude(../config/picflag.m4)
sinclude(../config/unwind_ipinfo.m4)

AC_INIT
AC_PREREQ([2.64])

AC_CONFIG_SRCDIR([Makefile.in])

# Determine the host, build, and target systems
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
AC_CANONICAL_TARGET
target_alias=${target_alias-$host_alias}

# Determine the noncanonical target name, for directory use.
ACX_NONCANONICAL_TARGET

# Determine the target- and build-specific subdirectories
GCC_TOPLEV_SUBDIRS

# Command-line options.
# Very limited version of AC_MAINTAINER_MODE.
AC_ARG_ENABLE([maintainer-mode],
  [AC_HELP_STRING([--enable-maintainer-mode],
                 [enable make rules and dependencies not useful (and
                  sometimes confusing) to the casual installer])],
  [case ${enable_maintainer_mode} in
     yes) MAINT='' ;;
     no) MAINT='#' ;;
     *) AC_MSG_ERROR([--enable-maintainer-mode must be yes or no]) ;;
   esac
   maintainer_mode=${enableval}],
  [MAINT='#'])
AC_SUBST([MAINT])dnl

AM_ENABLE_MULTILIB(, ..)
# Calculate toolexeclibdir
# Also toolexecdir, though it's only used in toolexeclibdir
case ${enable_version_specific_runtime_libs} in
  yes)
    # Need the gcc compiler version to know where to install libraries
    # and header files if --enable-version-specific-runtime-libs option
    # is selected.
    toolexecdir='$(libdir)/gcc/$(target_alias)'
    toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
    ;;
  no)
    if test -n "$with_cross_host" &&
       test x"$with_cross_host" != x"no"; then
      # Install a library built with a cross compiler in tooldir, not libdir.
      toolexecdir='$(exec_prefix)/$(target_alias)'
      toolexeclibdir='$(toolexecdir)/lib'
    else
      toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
      toolexeclibdir='$(libdir)'
    fi
    multi_os_directory=`$CC -print-multi-os-directory`
    case $multi_os_directory in
      .) ;; # Avoid trailing /.
      *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
    esac
    ;;
esac
AC_SUBST(toolexecdir)
AC_SUBST(toolexeclibdir)
#TODO: toolexeclibdir is currently disregarded

# Check the compiler.
# The same as in boehm-gc and libstdc++. Have to borrow it from there.
# We must force CC to /not/ be precious variables; otherwise
# the wrong, non-multilib-adjusted value will be used in multilibs.
# As a side effect, we have to subst CFLAGS ourselves.

m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
m4_define([_AC_ARG_VAR_PRECIOUS],[])
AC_PROG_CC
m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])

AC_SUBST(CFLAGS)

AC_ARG_ENABLE([shared],
[AC_HELP_STRING([--disable-shared],
                [don't provide a shared libgnat])],
[
case $enable_shared in
  yes | no) ;;
  *)
    enable_shared=no
    IFS="${IFS=         }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
    for pkg in $enableval; do
      case $pkg in
        ada | libada)
          enable_shared=yes ;;
      esac
    done
    IFS="$ac_save_ifs"
    ;;
esac
], [enable_shared=yes])
AC_SUBST([enable_shared])

GCC_PICFLAG
AC_SUBST([PICFLAG])

# These must be passed down, or are needed by gcc/libgcc.mvars
AC_PROG_AWK
AC_PROG_LN_S

# Determine what to build for 'gnatlib'
if test $build = $target \
   && test ${enable_shared} = yes ; then
  # Note that build=target is almost certainly the wrong test; FIXME
  default_gnatlib_target="gnatlib-shared"
else
  default_gnatlib_target="gnatlib-plain"
fi
AC_SUBST([default_gnatlib_target])

# Check for _Unwind_GetIPInfo
GCC_CHECK_UNWIND_GETIPINFO
have_getipinfo=
if test x$have_unwind_getipinfo = xyes; then
  have_getipinfo=-DHAVE_GETIPINFO
fi
AC_SUBST(have_getipinfo)

warn_cflags=
if test "x$GCC" = "xyes"; then
  warn_cflags='$(GCC_WARN_CFLAGS)'
fi
AC_SUBST(warn_cflags)

# Output: create a Makefile.
AC_CONFIG_FILES([Makefile])

AC_OUTPUT