Fix entry typo and missing information.

[deliverable/binutils-gdb.git] / gdb / configure.in

dnl Autoconf configure script for GDB, the GNU debugger.
dnl Copyright 1995, 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
dnl
dnl This file is part of GDB.
dnl 
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2 of the License, or
dnl (at your option) any later version.
dnl 
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
dnl 
dnl You should have received a copy of the GNU General Public License
dnl along with this program; if not, write to the Free Software
dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

dnl Process this file with autoconf to produce a configure script.

AC_PREREQ(2.13)dnl
AC_INIT(main.c)
AC_CONFIG_HEADER(config.h:config.in)
AM_MAINTAINER_MODE

AC_PROG_CC
AC_AIX
AC_ISC_POSIX
AM_PROG_CC_STDC

AC_CONFIG_AUX_DIR(`cd $srcdir;pwd`/..)
AC_CANONICAL_SYSTEM

dnl gdb doesn't use gettext, but bfd does.  We call this to ensure we
dnl link with the correct libraries.
ALL_LINGUAS=
CY_GNU_GETTEXT

dnl List of object files added by configure.

CONFIG_OBS=
CONFIG_DEPS=
CONFIG_SRCS=
CONFIG_INITS=
ENABLE_CFLAGS=
CONFIG_ALL=
CONFIG_CLEAN=
CONFIG_INSTALL=
CONFIG_UNINSTALL=

configdirs="doc testsuite"

AC_ARG_ENABLE(multi-ice,
[  --enable-multi-ice            Build the multi-ice-gdb-server],
[case "${enableval}" in
    yes ) enable_multi_ice="yes" ;;
    no)  enable_multi_ice="no" ;;
    *) AC_MSG_ERROR(Bad value for --enable-multi-ice: ${enableval}) ;;
  esac
])

if test "${enable_multi_ice}" = "yes"; then
  configdirs="${configdirs} multi-ice"
fi

dnl
changequote(,)dnl

. ${srcdir}/configure.host

. ${srcdir}/configure.tgt

targ=${target} ; . ${srcdir}/../bfd/config.bfd

dnl
changequote([,])dnl

dnl use BFD to determine the default architecture and byte order
dnl (bfd_vec->byteorder provides the latter).
targ=${target}
. ${srcdir}/../bfd/config.bfd

dnl We only want the first arch, if there is more than one.
targ_archs=`echo ${targ_archs} | sed -e 's/ .*//;'`

if test x"${targ_archs}" != x ; then
    AC_DEFINE_UNQUOTED(DEFAULT_BFD_ARCH, ${targ_archs})
fi
if test x"${targ_defvec}" != x ; then
    AC_DEFINE_UNQUOTED(DEFAULT_BFD_VEC, ${targ_defvec})
fi

AC_PROG_AWK
AC_PROG_INSTALL
AC_CHECK_TOOL(AR, ar)
AC_CHECK_TOOL(RANLIB, ranlib, :)
AC_CHECK_TOOL(DLLTOOL, dlltool)
AC_CHECK_TOOL(WINDRES, windres)
AC_PROG_YACC

dnl MiG is needed for the Hurd.
AC_CHECK_TOOL(MIG, mig)

AC_ARG_PROGRAM

AC_TYPE_SIGNAL

AC_HEADER_STDC

dnl Solaris 7 needs _MSE_INT_H defined to avoid a clash between <widec.h>
dnl and <wchar.h> that causes AC_CHECK_HEADERS to think <curses.h> doesn't
dnl exist.

case $host_os in solaris2.7 | solaris2.8) case "$GCC" in yes)
    AC_DEFINE(_MSE_INT_H)
esac; esac

AC_CHECK_HEADERS(ctype.h endian.h link.h thread_db.h proc_service.h \
	memory.h objlist.h ptrace.h sgtty.h stddef.h stdlib.h \
	string.h sys/procfs.h sys/ptrace.h sys/reg.h stdint.h \
	term.h termio.h termios.h unistd.h wait.h sys/wait.h \
	wchar.h wctype.h asm/debugreg.h sys/debugreg.h sys/select.h \
	time.h sys/ioctl.h sys/user.h \
	dirent.h sys/ndir.h sys/dir.h ndir.h \
	curses.h ncurses.h \
	poll.h sys/poll.h)
AC_HEADER_STAT

AC_C_CONST

AC_CHECK_FUNCS(setpgid sbrk sigaction isascii bzero bcopy btowc poll sigprocmask)
AC_FUNC_ALLOCA

# See if machine/reg.h supports the %fs and %gs i386 segment registers.
# Older i386 BSD's don't have the r_fs and r_gs members of `struct reg'.
AC_CACHE_CHECK([for r_fs in struct reg], gdb_cv_struct_reg_r_fs,
[AC_TRY_COMPILE([#include <machine/reg.h>], [struct reg r; r.r_fs;],
gdb_cv_struct_reg_r_fs=yes, gdb_cv_struct_reg_r_fs=no)])
if test $gdb_cv_struct_reg_r_fs = yes; then
  AC_DEFINE(HAVE_STRUCT_REG_R_FS)
fi
AC_CACHE_CHECK([for r_gs in struct reg], gdb_cv_struct_reg_r_gs,
[AC_TRY_COMPILE([#include <machine/reg.h>], [struct reg r; r.r_gs;],
gdb_cv_struct_reg_r_gs=yes, gdb_cv_struct_reg_r_gs=no)])
if test $gdb_cv_struct_reg_r_gs = yes; then
  AC_DEFINE(HAVE_STRUCT_REG_R_GS)
fi

dnl See if ptrace.h provides the PTRACE_GETREGS request.
AC_MSG_CHECKING(for PTRACE_GETREGS)
AC_CACHE_VAL(gdb_cv_have_ptrace_getregs,
[AC_TRY_COMPILE([#include <sys/ptrace.h>],
		[PTRACE_GETREGS;],
		[gdb_cv_have_ptrace_getregs=yes],
		[gdb_cv_have_ptrace_getregs=no])])
AC_MSG_RESULT($gdb_cv_have_ptrace_getregs)
if test $gdb_cv_have_ptrace_getregs = yes; then
  AC_DEFINE(HAVE_PTRACE_GETREGS)
fi

dnl See if ptrace.h provides the PTRACE_GETFPXREGS request.
AC_MSG_CHECKING(for PTRACE_GETFPXREGS)
AC_CACHE_VAL(gdb_cv_have_ptrace_getfpxregs,
[AC_TRY_COMPILE([#include <sys/ptrace.h>],
		[PTRACE_GETFPXREGS;],
		[gdb_cv_have_ptrace_getfpxregs=yes],
		[gdb_cv_have_ptrace_getfpxregs=no])])
AC_MSG_RESULT($gdb_cv_have_ptrace_getfpxregs)
if test $gdb_cv_have_ptrace_getfpxregs = yes; then
  AC_DEFINE(HAVE_PTRACE_GETFPXREGS)
fi

AC_CHECK_LIB(socket, socketpair)
AC_CHECK_FUNCS(socketpair)


BFD_NEED_DECLARATION(malloc)
BFD_NEED_DECLARATION(realloc)
BFD_NEED_DECLARATION(free)
BFD_NEED_DECLARATION(strerror)
BFD_NEED_DECLARATION(strdup)
BFD_NEED_DECLARATION(strstr)


# The following save_state_t checkery is only necessary for HPUX 
# versions earlier than 10.20.  When those fade from memory, this 
# could be expunged. --jsm 1999-03-22

AC_MSG_CHECKING(for HPUX save_state structure)
AC_EGREP_HEADER(save_state_t, machine/save_state.h, 
                gdb_cv_hpux_savestate=yes, gdb_cv_hpux_savestate=no)
AC_EGREP_HEADER(ss_wide, machine/save_state.h, gdb_cv_hpux_sswide=yes,
                gdb_cv_hpux_sswide=no)
if test $gdb_cv_hpux_savestate = yes
then
  AC_DEFINE(HAVE_STRUCT_SAVE_STATE_T, 1)
fi
if test $gdb_cv_hpux_sswide = yes
then
  AC_DEFINE(HAVE_STRUCT_MEMBER_SS_WIDE, 1)
fi
AC_MSG_RESULT($gdb_cv_hpux_sswide)


# If we are configured native on GNU/Linux, work around problems with
# sys/procfs.h
# Also detect which type of /proc is in use, such as for Unixware or Solaris.

if test "${target}" = "${host}"; then
  case "${host}" in
  i[[3456]]86-*-linux*)
	AC_DEFINE(START_INFERIOR_TRAPS_EXPECTED,2)
	AC_DEFINE(sys_quotactl)
	;;
  *-*-unixware* | *-*-sysv4.2* | *-*-sysv5*)
      AC_DEFINE(NEW_PROC_API)
      ;;
  *-*-solaris2.[[678]])
      AC_DEFINE(NEW_PROC_API)
      ;;
  esac
fi

if test "$ac_cv_header_sys_procfs_h" = yes; then
  BFD_HAVE_SYS_PROCFS_TYPE(pstatus_t)
  BFD_HAVE_SYS_PROCFS_TYPE(prrun_t)
  BFD_HAVE_SYS_PROCFS_TYPE(gregset_t)
  BFD_HAVE_SYS_PROCFS_TYPE(fpregset_t)
  BFD_HAVE_SYS_PROCFS_TYPE(prgregset_t)
  BFD_HAVE_SYS_PROCFS_TYPE(prfpregset_t)
  BFD_HAVE_SYS_PROCFS_TYPE(prgregset32_t)
  BFD_HAVE_SYS_PROCFS_TYPE(prfpregset32_t)
  BFD_HAVE_SYS_PROCFS_TYPE(lwpid_t)
  BFD_HAVE_SYS_PROCFS_TYPE(psaddr_t)

  dnl Check for struct link_map32 type, which allows a 64-bit Solaris
  dnl debugger to debug a 32-bit Solaris app with 32-bit shared libraries.

  AC_MSG_CHECKING(for struct link_map32 in sys/link.h)
  AC_CACHE_VAL(gdb_cv_have_struct_link_map32, 
    [AC_TRY_COMPILE([#define _SYSCALL32
#include <sys/link.h>], [struct link_map32 l;],
     gdb_cv_have_struct_link_map32=yes,
     gdb_cv_have_struct_link_map32=no)])
  AC_MSG_RESULT($gdb_cv_have_struct_link_map32)
  if test $gdb_cv_have_struct_link_map32 = yes; then
    AC_DEFINE(HAVE_STRUCT_LINK_MAP32)
  fi

  dnl Check for broken prfpregset_t type

  dnl For Linux/i386, glibc 2.1.3 was released with a bogus
  dnl prfpregset_t type (it's a typedef for the pointer to a struct
  dnl instead of the struct itself).  We detect this here, and work
  dnl around it in lin-thread.c.

  if test $bfd_cv_have_sys_procfs_type_prfpregset_t = yes; then
    AC_MSG_CHECKING(whether prfpregset_t type is broken)
    AC_CACHE_VAL(gdb_cv_prfpregset_t_broken,
      [AC_TRY_RUN([#include <sys/procfs.h>
       int main ()
       {
         if (sizeof (prfpregset_t) == sizeof (void *))
           return 1;
         return 0;
       }],
       gdb_cv_prfpregset_t_broken=no,
       gdb_cv_prfpregset_t_broken=yes,
       gdb_cv_prfpregset_t_broken=yes)])
    AC_MSG_RESULT($gdb_cv_prfpregset_t_broken)
    if test $gdb_cv_prfpregset_t_broken = yes; then
      AC_DEFINE(PRFPREGSET_T_BROKEN)
    fi
  fi

  dnl Check for PIOCSET ioctl entry 

  AC_MSG_CHECKING(for PIOCSET ioctl entry in sys/procfs.h)
  AC_CACHE_VAL(gdb_cv_have_procfs_piocset,
  [AC_TRY_COMPILE([#include <unistd.h>
#include <sys/types.h>
#include <sys/procfs.h>
], [
    int dummy;;
    dummy = ioctl(0, PIOCSET, &dummy);
  ],
  gdb_cv_have_procfs_piocset=yes, gdb_cv_have_procfs_piocset=no)])
  AC_MSG_RESULT($gdb_cv_have_procfs_piocset)
  if test $gdb_cv_have_procfs_piocset = yes; then
    AC_DEFINE(HAVE_PROCFS_PIOCSET)
  fi
fi

dnl See if host has libm.  This is usually needed by simulators.
AC_CHECK_LIB(m, main)

dnl Solaris puts wctype in /usr/lib/libw.a before Solaris 2.6.
dnl
dnl A bug in GNU ld 2.9.1 causes a problem if we link in -lw 
dnl under Solaris 2.6 because it is some funky empty library.
dnl So only link in libw if we have to.
AC_CHECK_LIB(c, wctype,: ,AC_CHECK_LIB(w, wctype))

dnl See if compiler supports "long long" type.

AC_MSG_CHECKING(for long long support in compiler)
AC_CACHE_VAL(gdb_cv_c_long_long,
[AC_TRY_COMPILE(, [
  extern long long foo;
  switch (foo & 2) { case 0: return 1; }
],
gdb_cv_c_long_long=yes, gdb_cv_c_long_long=no)])
AC_MSG_RESULT($gdb_cv_c_long_long)
if test $gdb_cv_c_long_long = yes; then
  AC_DEFINE(CC_HAS_LONG_LONG)
fi

dnl See if the compiler and runtime support printing long long

AC_MSG_CHECKING(for long long support in printf)
AC_CACHE_VAL(gdb_cv_printf_has_long_long,
[AC_TRY_RUN([
int main () {
  char buf[32];
  long long l = 0;
  l = (l << 16) + 0x0123;
  l = (l << 16) + 0x4567;
  l = (l << 16) + 0x89ab;
  l = (l << 16) + 0xcdef;
  sprintf (buf, "0x%016llx", l);
  return (strcmp ("0x0123456789abcdef", buf));
}],
gdb_cv_printf_has_long_long=yes,
gdb_cv_printf_has_long_long=no,
gdb_cv_printf_has_long_long=no)])
if test $gdb_cv_printf_has_long_long = yes; then
  AC_DEFINE(PRINTF_HAS_LONG_LONG)
fi
AC_MSG_RESULT($gdb_cv_printf_has_long_long)

dnl See if compiler supports "long double" type.  Can't use AC_C_LONG_DOUBLE
dnl because autoconf complains about cross-compilation issues.  However, this
dnl code uses the same variables as the macro for compatibility.

AC_MSG_CHECKING(for long double support in compiler)
AC_CACHE_VAL(ac_cv_c_long_double,
[AC_TRY_COMPILE(, [long double foo;],
ac_cv_c_long_double=yes, ac_cv_c_long_double=no)])
AC_MSG_RESULT($ac_cv_c_long_double)
if test $ac_cv_c_long_double = yes; then
  AC_DEFINE(HAVE_LONG_DOUBLE)
fi

dnl See if the compiler and runtime support printing long doubles

AC_MSG_CHECKING(for long double support in printf)
AC_CACHE_VAL(gdb_cv_printf_has_long_double,
[AC_TRY_RUN([
int main () {
  char buf[16];
  long double f = 3.141592653;
  sprintf (buf, "%Lg", f);
  return (strncmp ("3.14159", buf, 7));
}],
gdb_cv_printf_has_long_double=yes,
gdb_cv_printf_has_long_double=no,
gdb_cv_printf_has_long_double=no)])
if test $gdb_cv_printf_has_long_double = yes; then
  AC_DEFINE(PRINTF_HAS_LONG_DOUBLE)
fi
AC_MSG_RESULT($gdb_cv_printf_has_long_double)

dnl See if the compiler and runtime support scanning long doubles

AC_MSG_CHECKING(for long double support in scanf)
AC_CACHE_VAL(gdb_cv_scanf_has_long_double,
[AC_TRY_RUN([
int main () {
  char *buf = "3.141592653";
  long double f = 0;
  sscanf (buf, "%Lg", &f);
  return !(f > 3.14159 && f < 3.14160);
}],
gdb_cv_scanf_has_long_double=yes,
gdb_cv_scanf_has_long_double=no,
gdb_cv_scanf_has_long_double=no)])
if test $gdb_cv_scanf_has_long_double = yes; then
  AC_DEFINE(SCANF_HAS_LONG_DOUBLE)
fi
AC_MSG_RESULT($gdb_cv_scanf_has_long_double)

AC_FUNC_MMAP

dnl See if thread_db library is around for Solaris thread debugging.  Note that
dnl we must explicitly test for version 1 of the library because version 0
dnl (present on Solaris 2.4 or earlier) doesn't have the same API.

dnl Note that we only want this if we are both native (host == target), and
dnl not doing a canadian cross build (build == host).

if test ${build} = ${host} -a ${host} = ${target} ; then
   case ${host_os} in
   hpux*)
      AC_MSG_CHECKING(for HPUX/OSF thread support)
      if test -f /usr/include/dce/cma_config.h ; then
         if test "$GCC" = "yes" ; then
            AC_MSG_RESULT(yes)
            AC_DEFINE(HAVE_HPUX_THREAD_SUPPORT)
            CONFIG_OBS="${CONFIG_OJS} hpux-thread.o"
            CONFIG_SRCS="${CONFIG_SRCS} hpux-thread.c"
         else
            AC_MSG_RESULT(no (suppressed because you are not using GCC))
         fi
      else
         AC_MSG_RESULT(no)
      fi
      ;;
   solaris*)
      AC_MSG_CHECKING(for Solaris thread debugging library)
      if test -f /usr/lib/libthread_db.so.1 ; then
         AC_MSG_RESULT(yes)
         AC_DEFINE(HAVE_THREAD_DB_LIB)
         CONFIG_OBS="${CONFIG_OBS} sol-thread.o"
         CONFIG_SRCS="${CONFIG_SRCS} sol-thread.c"
         AC_CHECK_LIB(dl, dlopen)
         if test "$GCC" = "yes" ; then
            # The GNU linker requires the -export-dynamic option to make
            # all symbols visible in the dynamic symbol table.
            hold_ldflags=$LDFLAGS
            AC_MSG_CHECKING(for the ld -export-dynamic flag)
            LDFLAGS="${LDFLAGS} -Wl,-export-dynamic"
            AC_TRY_LINK(, [int i;], found=yes, found=no)
            LDFLAGS=$hold_ldflags
            AC_MSG_RESULT($found)
            if test $found = yes; then
               CONFIG_LDFLAGS="${CONFIG_LDFLAGS} -Wl,-export-dynamic"
            fi
         fi
	 # Sun randomly tweaked the prototypes in <proc_service.h>
	 # at one point.
	 AC_MSG_CHECKING(if <proc_service.h> is old)
	 AC_CACHE_VAL(gdb_cv_proc_service_is_old,[
	    AC_TRY_COMPILE([
		#include <proc_service.h>
		ps_err_e ps_pdwrite
		    (struct ps_prochandle*, psaddr_t, const void*, size_t);
	    ],, gdb_cv_proc_service_is_old=no,
	        gdb_cv_proc_service_is_old=yes)
	 ])
	 AC_MSG_RESULT($gdb_cv_proc_service_is_old)
	 if test $gdb_cv_proc_service_is_old = yes; then
	    AC_DEFINE(PROC_SERVICE_IS_OLD)
	 fi
      else
         AC_MSG_RESULT(no)
      fi
      ;;
   esac
   AC_SUBST(CONFIG_LDFLAGS)
fi

dnl Handle optional features that can be enabled.

dnl Handle MI sub-directory configury.
AC_ARG_ENABLE(gdbmi,
[  --enable-gdbmi            Enable GDB-MI interface],
[
  case "${enable_gdbmi}" in
    yes | no) ;;
    "")  enable_gdbmi=yes ;;
    *)
      AC_MSG_ERROR(Bad value for --enable-gdbmi: ${enableval})
    ;;
  esac
])
case ${enable_gdbmi} in
  "yes" )
    if test -d "${srcdir}/mi" ; then
      CONFIG_OBS="${CONFIG_OBS} \$(SUBDIR_MI_OBS)"
      CONFIG_DEPS="${CONFIG_DEPS} \$(SUBDIR_MI_DEPS)"
      CONFIG_SRCS="${CONFIG_SRS} \$(SUBDIR_MI_SRCS)"
      CONFIG_INITS="${CONFIG_INITS} \$(SUBDIR_MI_INITS)"
      ENABLE_CFLAGS="${ENABLE_CFLAGS} \$(SUBDIR_MI_CFLAGS)"
      CONFIG_ALL="${CONFIG_ALL} \$(SUBDIR_MI_ALL)"
      CONFIG_CLEAN="${CONFIG_CLEAN} \$(SUBDIR_MI_CLEAN)"
      CONFIG_INSTALL="${CONFIG_INSTALL} \$(SUBDIR_MI_INSTALL)"
      CONFIG_UNINSTALL="${CONFIG_UNINSTALL} \$(SUBDIR_MI_UNINSTALL)"
    fi
    ;;
esac

AC_ARG_ENABLE(tui,
[  --enable-tui            Enable full-screen terminal user interface],
[
  case "${enable_tui}" in
    yes | no) ;;
    "")  enable_tui=yes ;;
    *)
      AC_MSG_ERROR(Bad value for --enable-tui: ${enableval})
    ;;
  esac
])
case ${enable_tui} in
  "yes" )
    if test -d "${srcdir}/tui" ; then
      CONFIG_OBS="${CONFIG_OBS} \$(SUBDIR_TUI_OBS)"
      CONFIG_DEPS="${CONFIG_DEPS} \$(SUBDIR_TUI_DEPS)"
      CONFIG_SRCS="${CONFIG_SRS} \$(SUBDIR_TUI_SRCS)"
      CONFIG_INITS="${CONFIG_INITS} \$(SUBDIR_TUI_INITS)"
      ENABLE_CFLAGS="${ENABLE_CFLAGS} \$(SUBDIR_TUI_CFLAGS)"
      CONFIG_ALL="${CONFIG_ALL} \$(SUBDIR_TUI_ALL)"
      CONFIG_CLEAN="${CONFIG_CLEAN} \$(SUBDIR_TUI_CLEAN)"
      CONFIG_INSTALL="${CONFIG_INSTALL} \$(SUBDIR_TUI_INSTALL)"
      CONFIG_UNINSTALL="${CONFIG_UNINSTALL} \$(SUBDIR_TUI_UNINSTALL)"
    fi
    ;;
esac

AC_ARG_ENABLE(netrom,
[  --enable-netrom         Enable NetROM support],
[case "${enableval}" in
yes)	enable_netrom=yes ;;
no)	enable_netrom=no ;;
*)	AC_MSG_ERROR(bad value ${enableval} given for netrom option) ;;
esac])

if test "${enable_netrom}" = "yes"; then
	CONFIG_OBS="${CONFIG_OBS} remote-nrom.o" 
        CONFIG_SRCS="${CONFIG_SRCS} remote-nrom.c"
fi


# Don't add -Wall or -Wunused, they include -Wunused-parameter which
# causes noise.
build_warnings="-Wimplicit -Wreturn-type -Wcomment -Wtrigraphs \
-Wformat -Wparentheses -Wpointer-arith -Wuninitialized"
# Up for debate: -Wswitch -Wcomment -trigraphs -Wtrigraphs
# -Wunused-function -Wunused-label -Wunused-variable -Wunused-value
# -Wchar-subscripts -Wuninitialized -Wtraditional -Wshadow -Wcast-qual
# -Wcast-align -Wwrite-strings -Wconversion -Wstrict-prototypes
# -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls
# -Woverloaded-virtual -Winline -Werror"
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 compiler warning flags = $build_warnings" 6>&1
fi])dnl
WARN_CFLAGS=""
WERROR_CFLAGS=""
if test "x${build_warnings}" != x -a "x$GCC" = xyes
then
    AC_MSG_CHECKING(compiler warning flags)
    # Separate out the -Werror flag as some files just cannot be
    # compiled with it enabled.
    for w in ${build_warnings}; do
	case $w in
	-Werr*) WERROR_CFLAGS=-Werror ;;
	*) # Check that GCC accepts it
	    if $CC $w 2>&1 | grep 'unrecognized option' > /dev/null; then
		:
	    else
		WARN_CFLAGS="${WARN_CFLAGS} $w"
	    fi
	esac
    done
    AC_MSG_RESULT(${WARN_CFLAGS}${WERROR_CFLAGS})
fi
AC_SUBST(WARN_CFLAGS)
AC_SUBST(WERROR_CFLAGS)

MMALLOC_CFLAGS=
MMALLOC=
AC_SUBST(MMALLOC_CFLAGS)
AC_SUBST(MMALLOC)

AC_ARG_WITH(mmalloc,
[  --with-mmalloc          Use memory mapped malloc package],
[case "${withval}" in
  yes)  want_mmalloc=true ;;
  no)   want_mmalloc=false;;
  *)    AC_MSG_ERROR(bad value ${withval} for GDB with-mmalloc option) ;;
esac],[want_mmalloc=false])dnl

if test x$want_mmalloc = xtrue; then
   AC_DEFINE(USE_MMALLOC)
   AC_DEFINE(MMCHECK_FORCE)
   MMALLOC_CFLAGS="-I$srcdir/../mmalloc"
   MMALLOC='../mmalloc/libmmalloc.a'
fi

AC_ARG_WITH(included-regex,
[  --with-included-regex          Use included regex],
[case "${withval}" in
  yes)  want_included_regex=true ;;
  no)   want_included_regex=false;;
  *)    AC_MSG_ERROR(bad value ${withval} for GDB with-included-regex option) ;;
esac],[want_included_regex=true])dnl

if test $want_included_regex = false; then
  AC_MSG_CHECKING(for GNU regex)
  AC_CACHE_VAL(gdb_cv_have_gnu_regex,
[AC_TRY_COMPILE([#include <gnu-versions.h>
#include <sys/types.h>
#include <regex.h>],
[#if !defined _GNU_REGEX_INTERFACE_VERSION || !defined __GLIBC__ || __GLIBC__ < 2
#error No valid GNU regex.
#endif
],
		[gdb_cv_have_gnu_regex=yes],
		[gdb_cv_have_gnu_regex=no])])
  AC_MSG_RESULT($gdb_cv_have_gnu_regex)
  if test $gdb_cv_have_gnu_regex = no; then
	want_included_regex=true
  fi
fi

if test x${want_included_regex} = xtrue; then
    REGEX="gnu-regex.o"
    AC_DEFINE(USE_INCLUDED_REGEX)
fi
AC_SUBST(REGEX)

# In the Cygwin environment, we need some additional flags.
AC_CACHE_CHECK([for cygwin], gdb_cv_os_cygwin,
[AC_EGREP_CPP(lose, [
#if defined (__CYGWIN__) || defined (__CYGWIN32__)
lose
#endif],[gdb_cv_os_cygwin=yes],[gdb_cv_os_cygwin=no])])


dnl Figure out which of the many generic ser-*.c files the _host_ supports.
SER_HARDWIRE="ser-unix.o ser-pipe.o ser-tcp.o"
case ${host} in
  *go32* ) SER_HARDWIRE=ser-go32.o ;;
  *djgpp* ) SER_HARDWIRE=ser-go32.o ;;
esac
AC_SUBST(SER_HARDWIRE)


dnl Figure out which term library to use.
if test x$gdb_host = xgo32; then
  TERM_LIB=
else
if test x$gdb_cv_os_cygwin = xyes; then
  TERM_LIB='`if test -r ../libtermcap/libtermcap.a; then echo ../libtermcap/libtermcap.a; else echo -ltermcap; fi`'
else
  TERM_LIB=
  AC_CHECK_LIB(ncurses, tgetent, TERM_LIB=-lncurses,
    AC_CHECK_LIB(Hcurses, tgetent, TERM_LIB=-lHcurses,
      AC_CHECK_LIB(termlib, tgetent, TERM_LIB=-ltermlib,
        AC_CHECK_LIB(termcap, tgetent, TERM_LIB=-ltermcap,
	  AC_CHECK_LIB(curses, tgetent, TERM_LIB=-lcurses,
	    AC_CHECK_LIB(terminfo, tgetent, TERM_LIB=-lterminfo))))))

  if test "x$TERM_LIB" = x
  then
    AC_MSG_ERROR(Could not find a term library, e.g. termcap or termlib!)
  fi
fi
fi
AC_SUBST(TERM_LIB)

# libreadline needs libuser32.a in a cygwin environment
WIN32LIBS=
if test x$gdb_cv_os_cygwin = xyes; then
    WIN32LIBS="-luser32"
    case "${target}" in
	*cygwin*) WIN32LIBS="$WIN32LIBS -limagehlp"
	;;
    esac
fi
AC_SUBST(WIN32LIBS)

LIBGUI="../libgui/src/libgui.a"
GUI_CFLAGS_X="-I${srcdir}/../libgui/src"
AC_SUBST(LIBGUI)
AC_SUBST(GUI_CFLAGS_X)

AC_ARG_WITH(cpu,
[  --with-cpu=CPU          Set the default CPU variant to debug],
[case "${target}" in
  powerpc-* | powerpcle-* )
    ## It would be nice to keep this table in sync with the one in
    ## gcc/configure.
    case "${with_cpu}" in
      ppc-uisa | rs6000 | 403 | 403GC | 505 | 860 | 601 | 602 | 603 \
      | 604 | 750 )
        ## Those are all handled in variants in rs6000-tdep.c, so they're fine.
      ;;
      common | power | power2 | rios | rios1 | rios2 | rsc | rsc1 ) 
        ## These are all RS6000 variants, as far as GDB is concerned.
        with_cpu=rs6000
      ;;
      603e | ec603e )
        with_cpu=603
      ;;
      604e )
	with_cpu=604
      ;;
      * )
        AC_MSG_WARN(GDB: unknown --with-cpu value: \`${with_cpu}'; using \`ppc-uisa'.)
	with_cpu=ppc-uisa
      ;;
    esac
  ;;
  * )
    AC_MSG_WARN(GDB may ignore the --with-cpu flag for ${target} targets)
  ;;
esac
AC_DEFINE_UNQUOTED(TARGET_CPU_DEFAULT, "${with_cpu}")
],)


AC_ARG_ENABLE(gdbtk,
[  --enable-gdbtk          Enable GDBTK GUI front end],
[case "${enableval}" in
    yes)
	case "$host" in
	*go32*)
	    AC_MSG_WARN([GDB does not support GDBtk on host ${host}.  GDBtk will be disabled.])
	    enable_gdbtk=no ;;
	*windows*)
	    AC_MSG_WARN([GDB does not support GDBtk on host ${host}.  GDBtk will be disabled.])
	    enable_gdbtk=no ;;
	*)
	    enable_gdbtk=yes ;;
	esac ;;
    no)
	enable_gdbtk=no  ;;
    *)
	AC_MSG_ERROR(bad value ${enableval} given for gdbtk option) ;;
esac],
[
# Default is on for everything but go32 and Cygwin
case "$host" in
    *go32* | *windows*)
	;;
    *)
 	if test -d "${srcdir}/gdbtk" ; then
            enable_gdbtk=yes
	fi
	;;
esac
])

WIN32LDAPP=
AC_SUBST(WIN32LIBS)
AC_SUBST(WIN32LDAPP)

configdir="unix"

GDBTKLIBS=
if test "${enable_gdbtk}" = "yes"; then

    CY_AC_PATH_TCLCONFIG
    if test -z "${no_tcl}"; then
	CY_AC_LOAD_TCLCONFIG
	CY_AC_PATH_TKCONFIG

	# If $no_tk is nonempty, then we can't do Tk, and there is no
	# point to doing Tcl.
	if test -z "${no_tk}"; then
	   CY_AC_LOAD_TKCONFIG
	   CY_AC_PATH_TCLH
	   CY_AC_PATH_TKH
	   CY_AC_PATH_ITCLH
	   CY_AC_PATH_ITKH
	   CY_AC_PATH_TIXH

	   # now look for Itcl library stuff

	   CY_AC_PATH_ITCLCONFIG
           if test -z "${no_itcl}"; then
             CY_AC_LOAD_ITCLCONFIG
	     case "${host}" in
	     *-*-cygwin*)
		itcldir=../itcl/itcl/win/
		;;
	     *)
		itcldir=../itcl/itcl/unix/
		;;
	     esac
 

	     ITCLLIB="${ITCL_BUILD_LIB_SPEC}"
	     ITCL_DEPS="${itcldir}${ITCL_LIB_FILE}"
           fi

	   
	   # now look for Itk library stuff
	   CY_AC_PATH_ITKCONFIG
           if test -z "${no_itcl}"; then
             CY_AC_LOAD_ITKCONFIG

	     case "${host}" in
	       *-*-cygwin*)
		 itkdir=../itcl/itk/win/
		 ;;
	       *)
		 itkdir=../itcl/itk/unix/
		 ;;
	       esac 

	     ITKLIB="${ITK_BUILD_LIB_SPEC}"
	     ITK_DEPS="${itkdir}${ITK_LIB_FILE}"
           fi

	   # now look for Tix library stuff
	   CY_AC_PATH_TIXCONFIG
           if test -z "${no_tix}"; then
             CY_AC_LOAD_TIXCONFIG
	     TIXLIB="${TIX_BUILD_LIB_SPEC}"
	     TIX_DEPS="${TIX_BUILD_LOCATION}/${TIX_LIB_FILE}"
           fi

           ENABLE_CFLAGS="$ENABLE_CFLAGS -DGDBTK"
	   # Tcl/Tk 8.1 require -fwritable strings.  I don't
           # know whether 8.2 will or not, but I bet it will.
           # I don't have to worry about 7.x since we don't support it.
           GDBTK_CFLAGS=""
	   if test "$GCC" = "yes"; then
               if test "$TCL_VERSION" != "8.0" ; then
                   GDBTK_CFLAGS="-fwritable-strings"
	       fi
           fi

	   # Include some libraries that Tcl and Tk want.
	   TCL_LIBS='$(LIBGUI) $(ITCL) $(ITK) $(TIX) $(TK) $(TCL) $(X11_LDFLAGS) $(X11_LIBS)'
	   CONFIG_DEPS='$(LIBGUI) $(ITCL_DEPS) $(ITK_DEPS) $(TIX_DEPS) $(TK_DEPS) $(TCL_DEPS)'
	   # Yes, the ordering seems wrong here.  But it isn't.
	   # TK_LIBS is the list of libraries that need to be linked
	   # after Tcl/Tk.  Note that this isn't put into LIBS.  If it
	   # were in LIBS then any link tests after this point would
	   # try to include things like `$(LIBGUI)', which wouldn't work.
	   GDBTKLIBS="${TCL_LIBS} ${TK_LIBS}"
	   CONFIG_SRCS="${CONFIG_SRCS} gdbtk/generic/gdbtk.c gdbtk/generic/gdbtk-cmds.c gdbtk/generic/gdbtk-hooks.c gdbtk/generic/gdbtk-varobj.c gdbtk/generic/gdbtk-wrapper.c"
	   CONFIG_OBS="${CONFIG_OBS} gdbtk.o gdbtk-cmds.o gdbtk-hooks.o gdbtk-varobj.o gdbtk-wrapper.o"
	   CONFIG_INITS="${CONFIG_INITS} gdbtk/generic/gdbtk.c gdbtk/generic/gdbtk-cmds.c gdbtk/generic/gdbtk-hooks.c gdbtk/generic/gdbtk-varobj.c gdbtk/generic/gdbtk-wrapper.c"
	   CONFIG_ALL="${CONFIG_ALL} \$(SUBDIR_GDBTK_ALL)"
	   CONFIG_CLEAN="${CONFIG_CLEAN} \$(SUBDIR_GDBTK_CLEAN)"
	   CONFIG_INSTALL="${CONFIG_INSTALL} \$(SUBDIR_GDBTK_INSTALL)"
	   CONFIG_UNINSTALL="${CONFIG_UNINSTALL} \$(SUBDIR_GDBTK_UNINSTALL)"

	   if test x$gdb_cv_os_cygwin = xyes; then
	      WIN32LIBS="${WIN32LIBS} -lshell32 -lgdi32 -lcomdlg32 -ladvapi32"
	      WIN32LDAPP="-Wl,--subsystem,console"
	      CONFIG_OBS="${CONFIG_OBS} gdbres.o"
	   fi
	fi
    fi
fi

AC_SUBST(X_CFLAGS)
AC_SUBST(X_LDFLAGS)
AC_SUBST(X_LIBS)
AC_SUBST(ITCLLIB)
AC_SUBST(ITCL_DEPS)
AC_SUBST(ITKLIB)
AC_SUBST(ITK_DEPS)
AC_SUBST(TIXLIB)
AC_SUBST(TIX_DEPS)
AC_SUBST(GDBTKLIBS)
AC_SUBST(GDBTK_CFLAGS)

AC_PATH_X

 
# Unlike the sim directory, whether a simulator is linked is controlled by 
# presence of a SIM= and a SIM_OBS= definition in the target '.mt' file.  
# This code just checks for a few cases where we'd like to ignore those
# definitions, even when they're present in the '.mt' file.  These cases
# are when --disable-sim is specified, or if the simulator directory is
# not part of the soruce tree.
#
AC_ARG_ENABLE(sim,
[  --enable-sim            Link gdb with simulator],
[echo "enable_sim = $enable_sim";
 echo "enableval = ${enableval}";
 case "${enableval}" in
  yes) ignore_sim=false ;;
  no)  ignore_sim=true ;;
  *)   ignore_sim=false ;;
 esac],
[ignore_sim=false])

if test ! -d "${srcdir}/../sim"; then
  ignore_sim=true
fi

if test "${ignore_sim}" = "true"; then
    IGNORE_SIM="SIM="
    IGNORE_SIM_OBS="SIM_OBS="
else
    IGNORE_SIM=""
    IGNORE_SIM_OBS=""
    AC_DEFINE(WITH_SIM)
fi
AC_SUBST(IGNORE_SIM)
AC_SUBST(IGNORE_SIM_OBS)

AC_SUBST(ENABLE_CFLAGS)

AC_SUBST(CONFIG_OBS)
AC_SUBST(CONFIG_DEPS)
AC_SUBST(CONFIG_SRCS)
AC_SUBST(CONFIG_INITS)
AC_SUBST(CONFIG_ALL)
AC_SUBST(CONFIG_CLEAN)
AC_SUBST(CONFIG_INSTALL)
AC_SUBST(CONFIG_UNINSTALL)

# Begin stuff to support --enable-shared
AC_ARG_ENABLE(shared,
[  --enable-shared         Use shared libraries],
[case "${enableval}" in
  yes) shared=true ;;
  no)  shared=false ;;
  *) shared=true ;;
esac])dnl

HLDFLAGS=
HLDENV=
# If we have shared libraries, try to set rpath reasonably.
if test "${shared}" = "true"; then
  case "${host}" in
  *-*-hpux*)
    HLDFLAGS='-Wl,+s,+b,$(libdir)'
    ;;
  *-*-irix5* | *-*-irix6*)
    HLDFLAGS='-Wl,-rpath,$(libdir)'
    ;;
  *-*-linux*aout*)
    ;;
  *-*-linux* | *-pc-linux-gnu*)
    HLDFLAGS='-Wl,-rpath,$(libdir)'
    ;;
  *-*-solaris*)
    HLDFLAGS='-R $(libdir)'
    ;;
  *-*-sysv4*)
    HLDENV='if test -z "$${LD_RUN_PATH}"; then LD_RUN_PATH=$(libdir); else LD_RUN_PATH=$${LD_RUN_PATH}:$(libdir); fi; export LD_RUN_PATH;'
    ;;
  esac
fi

# On SunOS, if the linker supports the -rpath option, use it to
# prevent ../bfd and ../opcodes from being included in the run time
# search path.
case "${host}" in
  *-*-sunos*)
    echo 'main () { }' > conftest.c
    ${CC} -o conftest -Wl,-rpath= conftest.c >/dev/null 2>conftest.t
    if grep 'unrecognized' conftest.t >/dev/null 2>&1; then
      :
    elif grep 'No such file' conftest.t >/dev/null 2>&1; then
      :
    elif grep 'do not mix' conftest.t >/dev/null 2>&1; then
      :
    elif grep 'some text already loaded' conftest.t >/dev/null 2>&1; then
      :
    elif test "${shared}" = "true"; then
      HLDFLAGS='-Wl,-rpath=$(libdir)'
    else
      HLDFLAGS='-Wl,-rpath='
    fi
    rm -f conftest.t conftest.c conftest
    ;;
esac
AC_SUBST(HLDFLAGS)
AC_SUBST(HLDENV)
# End stuff to support --enable-shared

# target_subdir is used by the testsuite to find the target libraries.
target_subdir=
if test "${host}" != "${target}"; then
    target_subdir="${target_alias}/"
fi
AC_SUBST(target_subdir)

frags=
host_makefile_frag=${srcdir}/config/${gdb_host_cpu}/${gdb_host}.mh
if test ! -f ${host_makefile_frag}; then
AC_MSG_ERROR("*** Gdb does not support host ${host}")
fi
frags="$frags $host_makefile_frag"

target_makefile_frag=${srcdir}/config/${gdb_target_cpu}/${gdb_target}.mt
if test ! -f ${target_makefile_frag}; then
AC_MSG_ERROR("*** Gdb does not support target ${target}")
fi
frags="$frags $target_makefile_frag"

AC_SUBST_FILE(host_makefile_frag)
AC_SUBST_FILE(target_makefile_frag)
AC_SUBST(frags)

changequote(,)dnl
hostfile=`sed -n '
s/XM_FILE[ 	]*=[ 	]*\([^ 	]*\)/\1/p
' ${host_makefile_frag}`

targetfile=`sed -n '
s/TM_FILE[ 	]*=[ 	]*\([^ 	]*\)/\1/p
' ${target_makefile_frag}`

GDB_MULTI_ARCH=`sed -n '
s/GDB_MULTI_ARCH[ 	]*=[ 	]*\([^ 	]*\)[ 	]*/\1/p
' ${target_makefile_frag}`

# these really aren't orthogonal true/false values of the same condition,
# but shells are slow enough that I like to reuse the test conditions
# whenever possible
if test "${target}" = "${host}"; then
nativefile=`sed -n '
s/NAT_FILE[ 	]*=[ 	]*\([^ 	]*\)/\1/p
' ${host_makefile_frag}`
# else
# GDBserver is only useful in a "native" enviroment
# configdirs=`echo $configdirs | sed 's/gdbserver//'`
fi
changequote([,])

# New targets should just set gdb_multi_arch=yes in configure.tgt.
# Old targets being converted can either do that or set GDB_MULTI_ARCH
# in the target specific makefile frag.  Eventually gdb_multi_arch=yes
# will be the default.
if test x"${GDB_MULTI_ARCH}" = x ; then
    case "${gdb_multi_arch}" in
    yes ) GDB_MULTI_ARCH=GDB_MULTI_ARCH_PURE ;;
    no ) GDB_MULTI_ARCH=0 ;;
    0|1|2 ) GDB_MULTI_ARCH=${gdb_multi_arch} ;;
    esac
fi
if test x"${GDB_MULTI_ARCH}" != x ; then
    AC_DEFINE_UNQUOTED(GDB_MULTI_ARCH, ${GDB_MULTI_ARCH})
fi
# Warn the user when they use an old pratice
case "${GDB_MULTI_ARCH}" in
    "" ) ;;
    0 | GDB_MULTI_ARCH_PARTIAL | 1 | GDB_MULTI_ARCH_TM | 2 )
	AC_MSG_WARN("GDB: Target is not pure multi-arch") ;;
    GDB_MULTI_ARCH_PURE )
	if test x"${targetfile}" != x ; then
	    AC_MSG_WARN("GDB: Ingoring TM_FILE in ${target_makefile_frag}")
	    targetfile=""
	fi ;;
    *)  AC_MSG_ERROR("GDB: Unknown GDB_MULTI_ARCH value ${GDB_MULTI_ARCH}");;
esac


SUBDIRS="doc testsuite nlm"
if test "${enable_multi_ice}" = "yes"; then
  SUBDIRS="${SUBDIRS} multi-ice"
fi

AC_SUBST(SUBDIRS)

# If hostfile (XM_FILE) and/or targetfile (TM_FILE) and/or nativefile
# (NAT_FILE) is not set in config/*/*.m[ht] files, we link to an empty
# version.

files=
links=

rm -f xm.h
xm_h=""
if test "${hostfile}" != ""; then
    xm_h=xm.h
    GDB_XM_FILE="config/${gdb_host_cpu}/${hostfile}"
    files="${files} ${GDB_XM_FILE}"
    links="${links} xm.h"
    AC_DEFINE_UNQUOTED(GDB_XM_FILE, ${GDB_XM_FILE})
fi
AC_SUBST(xm_h)

rm -f tm.h
tm_h=""
if test "${targetfile}" != ""; then
    tm_h=tm.h
    GDB_TM_FILE="config/${gdb_target_cpu}/${targetfile}"
    files="${files} ${GDB_TM_FILE}"
    links="${links} tm.h"
    AC_DEFINE_UNQUOTED(GDB_TM_FILE, ${GDB_TM_FILE})
fi
AC_SUBST(tm_h)

rm -f nm.h
nm_h=""
if test "${nativefile}" != ""; then
    nm_h=nm.h
    GDB_NM_FILE="config/${gdb_host_cpu}/${nativefile}"
    files="${files} ${GDB_NM_FILE}"
    links="${links} nm.h"
    AC_DEFINE_UNQUOTED(GDB_NM_FILE, ${GDB_NM_FILE})
fi
AC_SUBST(nm_h)

AC_PROG_LN_S

AC_LINK_FILES($files, $links)

dnl Check for exe extension set on certain hosts (e.g. Win32)
AC_EXEEXT

AC_CONFIG_SUBDIRS($configdirs)
AC_OUTPUT(Makefile .gdbinit:gdbinit.in,
[
dnl Autoconf doesn't provide a mechanism for modifying definitions 
dnl provided by makefile fragments.
dnl
if test "${nativefile}" = ""; then
sed -e '/^NATDEPFILES[[ 	]]*=[[ 	]]*/s//# NATDEPFILES=/' \
	< Makefile > Makefile.tem
mv -f Makefile.tem Makefile
fi

changequote(,)dnl
sed -e '/^TM_FILE[ 	]*=/s,^TM_FILE[ 	]*=[ 	]*,&config/'"${gdb_target_cpu}"'/,
/^XM_FILE[ 	]*=/s,^XM_FILE[ 	]*=[ 	]*,&config/'"${gdb_host_cpu}"'/,
/^NAT_FILE[ 	]*=/s,^NAT_FILE[ 	]*=[ 	]*,&config/'"${gdb_host_cpu}"'/,' <Makefile >Makefile.tmp
mv -f Makefile.tmp Makefile
changequote([,])dnl


case x$CONFIG_HEADERS in
xconfig.h:config.in)
echo > stamp-h ;;
esac
],
[
gdb_host_cpu=$gdb_host_cpu
gdb_target_cpu=$gdb_target_cpu
nativefile=$nativefile
])

exit 0