source: trunk/src/binutils/ld/configure.in@ 201

dnl Process this file with autoconf to produce a configure script
dnl
AC_PREREG(2.13)
AC_INIT(ldmain.c)

AC_CANONICAL_SYSTEM
AC_ISC_POSIX

changequote(,)dnl
BFD_VERSION=`sed -n -e 's/^.._INIT_AUTOMAKE.*,[         ]*\([^  ]*\)[   ]*).*/\1/p' < ${srcdir}/../bfd/configure.in`
changequote([,])dnl
AM_INIT_AUTOMAKE(ld, ${BFD_VERSION})

AM_PROG_LIBTOOL

AC_ARG_ENABLE(targets,
[  --enable-targets        alternative target configurations],
[case "${enableval}" in
  yes | "") AC_ERROR(enable-targets option must specify target names or 'all')
            ;;
  no)       enable_targets= ;;
  *)        enable_targets=$enableval ;;
esac])dnl
AC_ARG_ENABLE(64-bit-bfd,
[  --enable-64-bit-bfd     64-bit support (on hosts with narrower word sizes)],
[case "${enableval}" in
  yes)  want64=true  ;;
  no)   want64=false ;;
  *)    AC_MSG_ERROR(bad value ${enableval} for 64-bit-bfd option) ;;
esac],[want64=false])dnl

build_warnings="-W -Wall"
AC_ARG_ENABLE(build-warnings,
[  --enable-build-warnings Enable build-time compiler warnings if gcc is used],
[case "${enableval}" in
  yes)  ;;
  no)   build_warnings="-w";;
  ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
        build_warnings="${build_warnings} ${t}";;
  *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
        build_warnings="${t} ${build_warnings}";;
  *)    build_warnings=`echo "${enableval}" | sed -e "s/,/ /g"`;;
esac
if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
  echo "Setting warning flags = $build_warnings" 6>&1
fi])dnl
WARN_CFLAGS=""
if test "x${build_warnings}" != x -a "x$GCC" = xyes ; then
    WARN_CFLAGS="${build_warnings}"
fi
AC_SUBST(WARN_CFLAGS)

AM_CONFIG_HEADER(config.h:config.in)

if test -z "$target" ; then
    AC_MSG_ERROR(Unrecognized target system type; please check config.sub.)
fi
if test -z "$host" ; then
    AC_MSG_ERROR(Unrecognized host system type; please check config.sub.)
fi

# host-specific stuff:

AC_PROG_CC
AC_PROG_INSTALL

ALL_LINGUAS=
CY_GNU_GETTEXT

AC_EXEEXT

AC_PROG_YACC
AM_PROG_LEX

AM_MAINTAINER_MODE

. ${srcdir}/configure.host

AC_SUBST(HDEFINES)
AC_SUBST(HOSTING_CRT0)
AC_SUBST(HOSTING_LIBS)
AC_SUBST(NATIVE_LIB_DIRS)

AC_CHECK_HEADERS(string.h strings.h stdlib.h unistd.h)
AC_CHECK_FUNCS(sbrk)
AC_HEADER_DIRENT

BFD_BINARY_FOPEN

BFD_NEED_DECLARATION(strstr)
BFD_NEED_DECLARATION(free)
BFD_NEED_DECLARATION(sbrk)
BFD_NEED_DECLARATION(getenv)
BFD_NEED_DECLARATION(environ)

# When converting linker scripts into strings for use in emulation
# files, use astring.sed if the compiler supports ANSI string
# concatenation, or ostring.sed otherwise.  This is to support the
# broken Microsoft MSVC compiler, which limits the length of string
# constants, while still supporting pre-ANSI compilers which do not
# support string concatenation.
AC_MSG_CHECKING([whether ANSI C string concatenation works])
AC_CACHE_VAL(ld_cv_string_concatenation,
[AC_TRY_COMPILE(,[char *a = "a" "a";],
  [ld_cv_string_concatenation=yes],
  [ld_cv_string_concatenation=no])])
AC_MSG_RESULT($ld_cv_string_concatenation)
if test "$ld_cv_string_concatenation" = "yes"; then
  STRINGIFY=astring.sed
else
  STRINGIFY=ostring.sed
fi
AC_SUBST(STRINGIFY)

# target-specific stuff:

all_targets=
EMUL=
all_emuls=
all_emul_extras=
all_libpath=

dnl We need to get an arbitrary number of tdir definitions into
dnl Makefile.  We can't do it using AC_SUBST, because autoconf does
dnl not permit literal newlines in an AC_SUBST variables.  So we use a
dnl file.
rm -f tdirs

for targ_alias in `echo $target_alias $enable_targets | sed 's/,/ /g'`
do
  if test "$targ_alias" = "all"; then
    all_targets=true
  else
    # Canonicalize the secondary target names.
    result=`$ac_config_sub $targ_alias 2>/dev/null`
    if test -n "$result"; then
        targ=$result
    else
        targ=$targ_alias
    fi

    . ${srcdir}/configure.tgt

    if test "$targ" = "$target"; then
      EMUL=$targ_emul
    fi

    for i in $targ_emul $targ_extra_emuls $targ_extra_libpath; do
        case " $all_emuls " in
        *" e${i}.o "*) ;;
        *)
          all_emuls="$all_emuls e${i}.o"
          eval result=\$tdir_$i
          test -z "$result" && result=$targ_alias
          echo tdir_$i=$result >> tdirs
          ;;
        esac
    done

    for i in $targ_emul $targ_extra_libpath; do
        case " $all_libpath " in
        *" ${i} "*) ;;
        *)
          if test -z "$all_libpath"; then
            all_libpath=${i}
          else
            all_libpath="$all_libpath ${i}"
          fi
          ;;
        esac
    done

    for i in $targ_extra_ofiles; do
        case " $all_emul_extras " in
        *" ${i} "*) ;;
        *)
          all_emul_extras="$all_emul_extras ${i}"
          ;;
        esac
    done
  fi
done

AC_SUBST(EMUL)

TDIRS=tdirs
AC_SUBST_FILE(TDIRS)

dnl FIXME: We will build a 64 bit BFD for a 64 bit host or a 64 bit
dnl target, and in those cases we should also build the 64 bit
dnl emulations.
if test x${all_targets} = xtrue; then
  if test x${want64} = xtrue; then
    EMULATION_OFILES='$(ALL_EMULATIONS) $(ALL_64_EMULATIONS)'
  else
    EMULATION_OFILES='$(ALL_EMULATIONS)'
  fi
  EMUL_EXTRA_OFILES='$(ALL_EMUL_EXTRA_OFILES)'
else
  EMULATION_OFILES=$all_emuls
  EMUL_EXTRA_OFILES=$all_emul_extras
fi
AC_SUBST(EMULATION_OFILES)
AC_SUBST(EMUL_EXTRA_OFILES)

EMULATION_LIBPATH=$all_libpath
AC_SUBST(EMULATION_LIBPATH)

if test x${enable_static} = xno; then
  TESTBFDLIB="--rpath ../bfd/.libs ../bfd/.libs/libbfd.so"
else
  TESTBFDLIB="../bfd/.libs/libbfd.a"
fi
AC_SUBST(TESTBFDLIB)

target_vendor=${target_vendor=$host_vendor}
case "$target_vendor" in
  hp) EXTRA_SHLIB_EXTENSION=".sl" ;;
  *)  EXTRA_SHLIB_EXTENSION= ;;
esac
if test x${EXTRA_SHLIB_EXTENSION} != x ; then
  AC_DEFINE_UNQUOTED(EXTRA_SHLIB_EXTENSION, "$EXTRA_SHLIB_EXTENSION",
   [Additional extension a shared object might have.])
fi

AC_OUTPUT(Makefile po/Makefile.in:po/Make-in,
[sed -e '/POTFILES =/r po/POTFILES' po/Makefile.in > po/Makefile])