* acinclude.m4 (AM_ICONV): Prefer in-tree libiconv if present over

[deliverable/binutils-gdb.git] / gdb / acinclude.m4

dnl written by Rob Savoye <rob@cygnus.com> for Cygnus Support
dnl major rewriting for Tcl 7.5 by Don Libes <libes@nist.gov>

dnl gdb/configure.in uses BFD_NEED_DECLARATION, so get its definition.
sinclude(../bfd/bfd.m4)

dnl This gets the standard macros
sinclude(../config/acinclude.m4)

dnl This gets autoconf bugfixes
sinclude(../config/override.m4)

sinclude(../config/gettext-sister.m4)

dnl For AC_LIB_HAVE_LINKFLAGS.
sinclude(../config/lib-ld.m4)
sinclude(../config/lib-prefix.m4)
sinclude(../config/lib-link.m4)

dnl For ACX_PKGVERSION and ACX_BUGURL.
sinclude(../config/acx.m4)

dnl for TCL definitions
sinclude(../config/tcl.m4)

dnl For dependency tracking macros.
sinclude([../config/depstand.m4])

dnl For AM_LC_MESSAGES
sinclude([../config/lcmessage.m4])

dnl For AM_LANGINFO_CODESET.
sinclude([../config/codeset.m4])

#
# Sometimes the native compiler is a bogus stub for gcc or /usr/ucb/cc. This
# makes configure think it's cross compiling. If --target wasn't used, then
# we can't configure, so something is wrong. We don't use the cache
# here cause if somebody fixes their compiler install, we want this to work.
AC_DEFUN([CY_AC_C_WORKS],
[# If we cannot compile and link a trivial program, we can't expect anything to work
AC_MSG_CHECKING(whether the compiler ($CC) actually works)
AC_TRY_COMPILE(, [/* don't need anything here */],
        c_compiles=yes, c_compiles=no)

AC_TRY_LINK(, [/* don't need anything here */],
        c_links=yes, c_links=no)

if test x"${c_compiles}" = x"no" ; then
  AC_MSG_ERROR(the native compiler is broken and won't compile.)
fi

if test x"${c_links}" = x"no" ; then
  AC_MSG_ERROR(the native compiler is broken and won't link.)
fi
AC_MSG_RESULT(yes)
])

## ----------------------------------------- ##
## ANSIfy the C compiler whenever possible.  ##
## From Franc,ois Pinard                     ##
## ----------------------------------------- ##

# Copyright (C) 1996, 1997, 1999, 2000, 2001, 2008, 2009
  Free Software Foundation, Inc.

# This program 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 2, 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; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA 02110-1301, USA.

# serial 1

# @defmac AC_PROG_CC_STDC
# @maindex PROG_CC_STDC
# @ovindex CC
# If the C compiler in not in ANSI C mode by default, try to add an option
# to output variable @code{CC} to make it so.  This macro tries various
# options that select ANSI C on some system or another.  It considers the
# compiler to be in ANSI C mode if it handles function prototypes correctly.
#
# If you use this macro, you should check after calling it whether the C
# compiler has been set to accept ANSI C; if not, the shell variable
# @code{am_cv_prog_cc_stdc} is set to @samp{no}.  If you wrote your source
# code in ANSI C, you can make an un-ANSIfied copy of it by using the
# program @code{ansi2knr}, which comes with Ghostscript.
# @end defmac

AC_DEFUN([AM_PROG_CC_STDC],
[AC_REQUIRE([AC_PROG_CC])
AC_BEFORE([$0], [AC_C_INLINE])
AC_BEFORE([$0], [AC_C_CONST])
dnl Force this before AC_PROG_CPP.  Some cpp's, eg on HPUX, require
dnl a magic option to avoid problems with ANSI preprocessor commands
dnl like #elif.
dnl FIXME: can't do this because then AC_AIX won't work due to a
dnl circular dependency.
dnl AC_BEFORE([$0], [AC_PROG_CPP])
AC_MSG_CHECKING([for ${CC-cc} option to accept ANSI C])
AC_CACHE_VAL(am_cv_prog_cc_stdc,
[am_cv_prog_cc_stdc=no
ac_save_CC="$CC"
# Don't try gcc -ansi; that turns off useful extensions and
# breaks some systems' header files.
# AIX			-qlanglvl=ansi
# Ultrix and OSF/1	-std1
# HP-UX 10.20 and later	-Ae
# HP-UX older versions	-Aa -D_HPUX_SOURCE
# SVR4			-Xc -D__EXTENSIONS__
for ac_arg in "" -qlanglvl=ansi -std1 -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
do
  CC="$ac_save_CC $ac_arg"
  AC_TRY_COMPILE(
[#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
/* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */
struct buf { int x; };
FILE * (*rcsopen) (struct buf *, struct stat *, int);
static char *e (p, i)
     char **p;
     int i;
{
  return p[i];
}
static char *f (char * (*g) (char **, int), char **p, ...)
{
  char *s;
  va_list v;
  va_start (v,p);
  s = g (p, va_arg (v,int));
  va_end (v);
  return s;
}
int test (int i, double x);
struct s1 {int (*f) (int a);};
struct s2 {int (*f) (double a);};
int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
int argc;
char **argv;
], [
return f (e, argv, 0) != argv[0]  ||  f (e, argv, 1) != argv[1];
],
[am_cv_prog_cc_stdc="$ac_arg"; break])
done
CC="$ac_save_CC"
])
if test -z "$am_cv_prog_cc_stdc"; then
  AC_MSG_RESULT([none needed])
else
  AC_MSG_RESULT([$am_cv_prog_cc_stdc])
fi
case "x$am_cv_prog_cc_stdc" in
  x|xno) ;;
  *) CC="$CC $am_cv_prog_cc_stdc" ;;
esac
])

dnl From Bruno Haible.

AC_DEFUN([AM_ICONV],
[
  dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
  dnl those with the standalone portable GNU libiconv installed).

  AC_ARG_WITH([libiconv-prefix],
    AS_HELP_STRING([--with-libiconv-prefix=DIR], [search for libiconv in DIR/include and DIR/lib]), [
    for dir in `echo "$withval" | tr : ' '`; do
      if test -d $dir/include; then LIBICONV_INCLUDE="-I$dir/include"; fi
      if test -d $dir/lib; then LIBICONV_LIBDIR="-L$dir/lib"; fi
    done
   ])

  BUILD_LIBICONV_LIBDIR="-L../libiconv/lib/.libs -L../libiconv/lib/_libs"
  BUILD_LIBICONV_INCLUDE="-I../libiconv/include"

  AC_CACHE_CHECK(for iconv, am_cv_func_iconv, [
    am_cv_func_iconv="no, consider installing GNU libiconv"
    am_cv_lib_iconv=no
    am_cv_use_build_libiconv=no

    # If libiconv is part of the build tree, then try using it over
    # any system iconv.
    if test -d ../libiconv; then
      am_save_LIBS="$LIBS"
      am_save_CPPFLAGS="$CPPFLAGS"
      LIBS="$LIBS $BUILD_LIBICONV_LIBDIR -liconv"
      CPPFLAGS="$CPPFLAGS $BUILD_LIBICONV_INCLUDE"
      AC_TRY_LINK([#include <stdlib.h>
#include <iconv.h>],
        [iconv_t cd = iconv_open("","");
         iconv(cd,NULL,NULL,NULL,NULL);
         iconv_close(cd);],
	am_cv_use_build_libiconv=yes
        am_cv_lib_iconv=yes
        am_cv_func_iconv=yes)
      LIBS="$am_save_LIBS"
      CPPFLAGS="$am_save_CPPFLAGS"
    fi

    # Next, try to find iconv in libc.
    if test "$am_cv_func_iconv" != yes; then
      AC_TRY_LINK([#include <stdlib.h>
#include <iconv.h>],
        [iconv_t cd = iconv_open("","");
         iconv(cd,NULL,NULL,NULL,NULL);
         iconv_close(cd);],
        am_cv_func_iconv=yes)
    fi

    # If iconv was not in libc, try -liconv.  In this case, arrange to
    # look in the libiconv prefix, if it was specified by the user.
    if test "$am_cv_func_iconv" != yes; then
      am_save_CPPFLAGS="$CPPFLAGS"
      am_save_LIBS="$LIBS"
      if test -n "$LIBICONV_INCLUDE"; then
        CPPFLAGS="$CPPFLAGS $LIBICONV_INCLUDE"
        LIBS="$LIBS $LIBICONV_LIBDIR"
      fi
      LIBS="$LIBS -liconv"
      AC_TRY_LINK([#include <stdlib.h>
#include <iconv.h>],
        [iconv_t cd = iconv_open("","");
         iconv(cd,NULL,NULL,NULL,NULL);
         iconv_close(cd);],
        am_cv_lib_iconv=yes
        am_cv_func_iconv=yes)
      LIBS="$am_save_LIBS"
      CPPFLAGS="$am_save_CPPFLAGS"
    fi
  ])

  # Set the various flags based on the cache variables.  We can't rely
  # on the flags to remain set from the above code, due to caching.
  LIBICONV=
  if test "$am_cv_lib_iconv" = yes; then
    LIBICONV="-liconv"
  else
    LIBICONV_LIBDIR=
    LIBICONV_INCLUDE=
  fi
  if test "$am_cv_use_build_libiconv" = yes; then
    LIBICONV_LIBDIR="$BUILD_LIBICONV_LIBDIR"
    LIBICONV_INCLUDE="$BUILD_LIBICONV_INCLUDE"
  fi
  CPPFLAGS="$CPPFLAGS $LIBICONV_INCLUDE"
  LIBS="$LIBS $LIBICONV_LIBDIR $LIBICONV"

  if test "$am_cv_func_iconv" = yes; then
    AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
    AC_MSG_CHECKING([for iconv declaration])
    AC_CACHE_VAL(am_cv_proto_iconv, [
      AC_TRY_COMPILE([
#include <stdlib.h>
#include <iconv.h>
extern
#ifdef __cplusplus
"C"
#endif
#if defined(__STDC__) || defined(__cplusplus)
size_t iconv (iconv_t cd, char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);
#else
size_t iconv();
#endif
], [], am_cv_proto_iconv_arg1="", am_cv_proto_iconv_arg1="const")
      am_cv_proto_iconv="extern size_t iconv (iconv_t cd, $am_cv_proto_iconv_arg1 char * *inbuf, size_t *inbytesleft, char * *outbuf, size_t *outbytesleft);"])
    am_cv_proto_iconv=`echo "[$]am_cv_proto_iconv" | tr -s ' ' | sed -e 's/( /(/'`
    AC_MSG_RESULT([$]{ac_t:-
         }[$]am_cv_proto_iconv)
    AC_DEFINE_UNQUOTED(ICONV_CONST, $am_cv_proto_iconv_arg1,
      [Define as const if the declaration of iconv() needs const.])
  fi
])

dnl written by Guido Draheim <guidod@gmx.de>, original by Alexandre Oliva 
dnl Version 1.3 (2001/03/02)
dnl source http://www.gnu.org/software/ac-archive/Miscellaneous/ac_define_dir.html

AC_DEFUN([AC_DEFINE_DIR], [
  test "x$prefix" = xNONE && prefix="$ac_default_prefix"
  test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
  ac_define_dir=`eval echo [$]$2`
  ac_define_dir=`eval echo [$]ac_define_dir`
  ifelse($3, ,
    AC_DEFINE_UNQUOTED($1, "$ac_define_dir"),
    AC_DEFINE_UNQUOTED($1, "$ac_define_dir", $3))
])

dnl See whether we need a declaration for a function.
dnl The result is highly dependent on the INCLUDES passed in, so make sure
dnl to use a different cache variable name in this macro if it is invoked
dnl in a different context somewhere else.
dnl gcc_AC_CHECK_DECL(SYMBOL,
dnl 	[ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND [, INCLUDES]]])
AC_DEFUN([gcc_AC_CHECK_DECL],
[AC_MSG_CHECKING([whether $1 is declared])
AC_CACHE_VAL(gcc_cv_have_decl_$1,
[AC_TRY_COMPILE([$4],
[#ifndef $1
char *(*pfn) = (char *(*)) $1 ;
#endif], eval "gcc_cv_have_decl_$1=yes", eval "gcc_cv_have_decl_$1=no")])
if eval "test \"`echo '$gcc_cv_have_decl_'$1`\" = yes"; then
  AC_MSG_RESULT(yes) ; ifelse([$2], , :, [$2])
else
  AC_MSG_RESULT(no) ; ifelse([$3], , :, [$3])
fi
])dnl

dnl Check multiple functions to see whether each needs a declaration.
dnl Arrange to define HAVE_DECL_<FUNCTION> to 0 or 1 as appropriate.
dnl gcc_AC_CHECK_DECLS(SYMBOLS,
dnl 	[ACTION-IF-NEEDED [, ACTION-IF-NOT-NEEDED [, INCLUDES]]])
AC_DEFUN([gcc_AC_CHECK_DECLS],
[for ac_func in $1
do
changequote(, )dnl
  ac_tr_decl=HAVE_DECL_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
changequote([, ])dnl
gcc_AC_CHECK_DECL($ac_func,
  [AC_DEFINE_UNQUOTED($ac_tr_decl, 1) $2],
  [AC_DEFINE_UNQUOTED($ac_tr_decl, 0) $3],
dnl It is possible that the include files passed in here are local headers
dnl which supply a backup declaration for the relevant prototype based on
dnl the definition of (or lack of) the HAVE_DECL_ macro.  If so, this test
dnl will always return success.  E.g. see libiberty.h's handling of
dnl `basename'.  To avoid this, we define the relevant HAVE_DECL_ macro to
dnl 1 so that any local headers used do not provide their own prototype
dnl during this test.
#undef $ac_tr_decl
#define $ac_tr_decl 1
  $4
)
done
dnl Automatically generate config.h entries via autoheader.
if test x = y ; then
  patsubst(translit([$1], [a-z], [A-Z]), [\w+],
    [AC_DEFINE([HAVE_DECL_\&], 1,
      [Define to 1 if we found this declaration otherwise define to 0.])])dnl
fi
])

dnl Find the location of the private Tcl headers
dnl When Tcl is installed, this is TCL_INCLUDE_SPEC/tcl-private/generic
dnl When Tcl is in the build tree, this is not needed.
dnl
dnl Note: you must use first use SC_LOAD_TCLCONFIG!
AC_DEFUN([CY_AC_TCL_PRIVATE_HEADERS], [
  AC_MSG_CHECKING([for Tcl private headers])
  private_dir=""
  dir=`echo ${TCL_INCLUDE_SPEC}/tcl-private/generic | sed -e s/-I//`
  if test -f ${dir}/tclInt.h ; then
    private_dir=${dir}
  fi

  if test x"${private_dir}" = x; then
    AC_ERROR(could not find private Tcl headers)
  else
    TCL_PRIVATE_INCLUDE="-I${private_dir}"
    AC_MSG_RESULT(${private_dir})
  fi
])

dnl Find the location of the private Tk headers
dnl When Tk is installed, this is TK_INCLUDE_SPEC/tk-private/generic
dnl When Tk is in the build tree, this not needed.
dnl
dnl Note: you must first use SC_LOAD_TKCONFIG
AC_DEFUN([CY_AC_TK_PRIVATE_HEADERS], [
  AC_MSG_CHECKING([for Tk private headers])
  private_dir=""
  dir=`echo ${TK_INCLUDE_SPEC}/tk-private/generic | sed -e s/-I//`
  if test -f ${dir}/tkInt.h; then
    private_dir=${dir}
  fi

  if test x"${private_dir}" = x; then
    AC_ERROR(could not find Tk private headers)
  else
    TK_PRIVATE_INCLUDE="-I${private_dir}"
    AC_MSG_RESULT(${private_dir})
  fi
])

dnl GDB_AC_WITH_DIR([VARIABLE], [ARG-NAME], [HELP], [DEFAULT])
dnl Add a new --with option that defines a directory.
dnl The result is stored in VARIABLE.  AC_DEFINE_DIR is called
dnl on this variable, as is AC_SUBST.
dnl ARG-NAME is the base name of the argument (without "--with").
dnl HELP is the help text to use.
dnl If the user's choice is relative to the prefix, then the
dnl result is relocatable, then this will define the C macro
dnl VARIABLE_RELOCATABLE to 1; otherwise it is defined as 0.
dnl DEFAULT is the default value, which is used if the user
dnl does not specify the argument.
AC_DEFUN([GDB_AC_WITH_DIR], [
  AC_ARG_WITH([$2], AS_HELP_STRING([--with-][$2][=PATH], [$3]), [
    [$1]=$withval], [[$1]=[$4]])
  AC_DEFINE_DIR([$1], [$1], [$3])
  AC_SUBST([$1])
  if test "x$exec_prefix" = xNONE || test "x$exec_prefix" = 'x${prefix}'; then
     if test "x$prefix" = xNONE; then
     	test_prefix=/usr/local
     else
	test_prefix=$prefix
     fi
  else
     test_prefix=$exec_prefix
  fi
  value=0
  case ${ac_define_dir} in
     "${test_prefix}"|"${test_prefix}/"*|\
	'${exec_prefix}'|'${exec_prefix}/'*)
     value=1
     ;;
  esac
  AC_DEFINE_UNQUOTED([$1]_RELOCATABLE, $value, [Define if the $2 directory should be relocated when GDB is moved.])
  ])