binutils-gdb/ld/configure.in

dnl Process this file with autoconf to produce a configure script
dnl
AC_PREREG(2.0)
AC_INIT(ldmain.c)

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_CONFIG_HEADER(config.h:config.in)

AC_CONFIG_AUX_DIR(`cd $srcdir/..; pwd`)
AC_CANONICAL_SYSTEM
if test -z "$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
AC_ARG_PROGRAM

# host-specific stuff:

. ${srcdir}/configure.host

AC_PROG_CC
AC_SUBST(CFLAGS)
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)

BFD_BINARY_FOPEN

# target-specific stuff:

# Canonicalize the secondary target names.
if test -n "$enable_targets"; then
    for targ in `echo $enable_targets | sed 's/,/ /g'`
    do
	result=`$ac_config_sub $targ 2>/dev/null`
	if test -n "$result"; then
	    canon_targets="$canon_targets $result"
	else
	    # Allow targets that config.sub doesn't recognize, like "all".
	    canon_targets="$canon_targets $targ"
	fi
    done
fi

all_targets=false
EMUL=
all_emuls=

for targ in $target $canon_targets
do
    if test "x$targ" = "xall"; then
        all_targets=true
    else
	. ${srcdir}/configure.tgt

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

	all_emuls="${all_emuls} ${targ_emul} ${targ_extra_emuls}"
    fi
done

AC_SUBST(EMUL)

if test x${all_targets} = xfalse; then
    # uniq the list.
    f=""
    for i in $all_emuls ; do
	case " $f " in
	*" e$i.o "*) ;;
	*) f="$f e$i.o" ;;
	esac
    done

    EMULATION_OFILES="$f"

else	# all_targets is true
    EMULATION_OFILES='$(ALL_EMULATIONS)'
fi	# all_targets is true

AC_SUBST(EMULATION_OFILES)

AC_OUTPUT(Makefile,
[case x$CONFIG_HEADERS in xconfig.h:config.in) echo > stamp-h ;; esac])