configure.in: Avoid trailing /.

[thirdparty/gcc.git] / libf2c / aclocal.m4

dnl Copyright (C) 1994, 1995-8, 1999, 2001, 2002 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY, to the extent permitted by law; without
dnl even the implied warranty of MERCHANTABILITY or FITNESS FOR A
dnl PARTICULAR PURPOSE.

dnl
dnl Initialize configure bits.
dnl
dnl GLIBCPP_TOPREL_CONFIGURE
AC_DEFUN(GLIBCPP_TOPREL_CONFIGURE, [
  dnl Default to --enable-multilib
  AC_ARG_ENABLE(multilib,
  [  --enable-multilib       build hella library versions (default)],
  [case "${enableval}" in
    yes) multilib=yes ;;
    no)  multilib=no ;;
    *)   AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
   esac], [multilib=yes])dnl

# When building with srcdir == objdir, links to the source files will
# be created in directories within the target_subdir.  We have to
# adjust toplevel_srcdir accordingly, so that configure finds
# install-sh and other auxiliary files that live in the top-level
# source directory.
if test "${srcdir}" = "."; then
  if test -z "${with_target_subdir}"; then
    toprel=".."
  else
    if test "${with_target_subdir}" != "."; then
      toprel="${with_multisrctop}../.."
    else
      toprel="${with_multisrctop}.."
    fi
  fi
else
  toprel=".."
fi
AC_CONFIG_AUX_DIR(${srcdir}/$toprel)
toplevel_srcdir=\${top_srcdir}/$toprel
AC_SUBST(toplevel_srcdir)
])

dnl
dnl Initialize configure bits.
dnl
dnl GLIBCPP_CONFIGURE
AC_DEFUN(GLIBCPP_CONFIGURE, [
# Export build and source directories.
# These need to be absolute paths, yet at the same time need to
# canonicalize only relative paths, because then amd will not unmount
# drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
glibcpp_builddir=`${PWDCMD-pwd}`
case $srcdir in
[\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
*) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
esac
AC_SUBST(glibcpp_builddir)
AC_SUBST(glibcpp_srcdir)

dnl This is here just to satisfy automake.
ifelse(not,equal,[AC_CONFIG_AUX_DIR(..)])

# Will set LN_S to either 'ln -s' or 'ln'.  With autoconf 2.50+, can also
# be 'cp -p' if linking isn't available.
#ac_cv_prog_LN_S='cp -p'
AC_PROG_LN_S

# We use these options to decide which functions to include.
AC_ARG_WITH(target-subdir,
[  --with-target-subdir=SUBDIR
                           configuring in a subdirectory])
AC_ARG_WITH(cross-host,
[  --with-cross-host=HOST  configuring with a cross compiler])

  # Never versions of autoconf add an underscore to these functions.
  # Prevent future problems ...
  ifdef([AC_PROG_CC_G],[],[define([AC_PROG_CC_G],defn([_AC_PROG_CC_G]))])
  ifdef([AC_PROG_CC_GNU],[],[define([AC_PROG_CC_GNU],defn([_AC_PROG_CC_GNU]))])
  ifdef([AC_PROG_CXX_G],[],[define([AC_PROG_CXX_G],defn([_AC_PROG_CXX_G]))])
  ifdef([AC_PROG_CXX_GNU],[],[define([AC_PROG_CXX_GNU],defn([_AC_PROG_CXX_GNU]))])

#  AC_PROG_CC

# FIXME: We temporarily define our own version of AC_PROG_CC.  This is
# copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS.  We
# are probably using a cross compiler, which will not be able to fully
# link an executable.  This should really be fixed in autoconf
# itself.

AC_DEFUN(LIB_AC_PROG_CC,
[AC_BEFORE([$0], [AC_PROG_CPP])dnl
dnl Fool anybody using AC_PROG_CC.
AC_PROVIDE([AC_PROG_CC])
AC_CHECK_PROG(CC, gcc, gcc)
if test -z "$CC"; then
  AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
  test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
fi

AC_PROG_CC_GNU

if test $ac_cv_prog_gcc = yes; then
  GCC=yes
dnl Check whether -g works, even if CFLAGS is set, in case the package
dnl plays around with CFLAGS (such as to build both debugging and
dnl normal versions of a library), tasteless as that idea is.
  ac_test_CFLAGS="${CFLAGS+set}"
  ac_save_CFLAGS="$CFLAGS"
  CFLAGS=
  AC_PROG_CC_G
  if test "$ac_test_CFLAGS" = set; then
    CFLAGS="$ac_save_CFLAGS"
  elif test $ac_cv_prog_cc_g = yes; then
    CFLAGS="-g -O2"
  else
    CFLAGS="-O2"
  fi
else
  GCC=
  test "${CFLAGS+set}" = set || CFLAGS="-g"
fi
])

LIB_AC_PROG_CC

  AC_CHECK_TOOL(AS, as)
  AC_CHECK_TOOL(AR, ar)
  AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
  AC_PROG_INSTALL

  # We need AC_EXEEXT to keep automake happy in cygnus mode.  However,
  # at least currently, we never actually build a program, so we never
  # need to use $(EXEEXT).  Moreover, the test for EXEEXT normally
  # fails, because we are probably configuring with a cross compiler
  # which can't create executables.  So we include AC_EXEEXT to keep
  # automake happy, but we don't execute it, since we don't care about
  # the result.
  if false; then
    # autoconf 2.50 runs AC_EXEEXT by default, and the macro expands
    # to nothing, so nothing would remain between `then' and `fi' if it
    # were not for the `:' below.
    :
    AC_EXEEXT
  fi
])


dnl
dnl  GLIBCPP_EXPORT_INSTALL_INFO
dnl  calculates gxx_install_dir
dnl  exports glibcpp_toolexecdir
dnl  exports glibcpp_toolexeclibdir
dnl  exports glibcpp_prefixdir
dnl
dnl Assumes cross_compiling bits already done, and with_cross_host in
dnl particular
dnl
dnl GLIBCPP_EXPORT_INSTALL_INFO
AC_DEFUN(GLIBCPP_EXPORT_INSTALL_INFO, [
# Assumes glibcpp_builddir, glibcpp_srcdir are alreay set up and
# exported correctly in GLIBCPP_CONFIGURE.
glibcpp_toolexecdir=no
glibcpp_toolexeclibdir=no
glibcpp_prefixdir=${prefix}

AC_MSG_CHECKING([for interface version number])
libstdcxx_interface=$INTERFACE
AC_MSG_RESULT($libstdcxx_interface)

# Process the option "--enable-version-specific-runtime-libs"
AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
AC_ARG_ENABLE(version-specific-runtime-libs,
[  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],
[case "$enableval" in
 yes) version_specific_libs=yes ;;
 no)  version_specific_libs=no ;;
 *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
 esac],
version_specific_libs=no)dnl
# Option set, now we can test it.
AC_MSG_RESULT($version_specific_libs)

gcc_version_trigger=${toplevel_srcdir}/gcc/version.c
gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([[^ \"]]*\)[[ \"]].*/\1/'`
gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`
AC_SUBST(gcc_version)
AC_SUBST(gcc_version_trigger)

if test $version_specific_libs = yes; then
  # Need the gcc compiler version to know where to install libraries
  # and header files if --enable-version-specific-runtime-libs option
  # is selected.
  changequote(,)dnl
  glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
  glibcpp_toolexeclibdir='$(toolexecdir)/'${gcc_version}'$(MULTISUBDIR)'
  changequote([,])dnl
fi

# Calculate glibcpp_toolexecdir, glibcpp_toolexeclibdir
# Install a library built with a cross compiler in tooldir, not libdir.
if test x"$glibcpp_toolexecdir" = x"no"; then 
  if test -n "$with_cross_host" &&
     test x"$with_cross_host" != x"no"; then
    glibcpp_toolexecdir='$(exec_prefix)/$(target_alias)'
    glibcpp_toolexeclibdir='$(toolexecdir)/lib'
  else
    glibcpp_toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
    glibcpp_toolexeclibdir='$(libdir)'
  fi
  multi_os_directory=`$CC -print-multi-os-directory`
  case $multi_os_directory in
    .) ;; # Avoid trailing /.
    *) glibcpp_toolexeclibdir=$glibcpp_toolexeclibdir/$multi_os_directory ;;
  esac
fi

AC_SUBST(glibcpp_prefixdir)
AC_SUBST(glibcpp_toolexecdir)
AC_SUBST(glibcpp_toolexeclibdir)
])

sinclude(../libtool.m4)
dnl The lines below arrange for aclocal not to bring an installed
dnl libtool.m4 into aclocal.m4, while still arranging for automake to
dnl add a definition of LIBTOOL to Makefile.in.
ifelse(,,,[AC_SUBST(LIBTOOL)
AC_DEFUN([AM_PROG_LIBTOOL])
AC_DEFUN([AC_LIBTOOL_DLOPEN])
AC_DEFUN([AC_PROG_LD])
])