[bpt/guile.git] / acinclude.m4

dnl  On the NeXT, #including <utime.h> doesn't give you a definition for
dnl  struct utime, unless you #define _POSIX_SOURCE.

AC_DEFUN(GUILE_STRUCT_UTIMBUF, [
  AC_CACHE_CHECK([whether we need POSIX to get struct utimbuf],
    guile_cv_struct_utimbuf_needs_posix,
    [AC_TRY_CPP([
#ifdef __EMX__
#include <sys/utime.h>
#else
#include <utime.h>
#endif
struct utime blah;
],
                guile_cv_struct_utimbuf_needs_posix=no,
		guile_cv_struct_utimbuf_needs_posix=yes)])
  if test "$guile_cv_struct_utimbuf_needs_posix" = yes; then
     AC_DEFINE(UTIMBUF_NEEDS_POSIX)
  fi])


dnl
dnl Apparently, at CMU they have a weird version of libc.h that is
dnl installed in /usr/local/include and conflicts with unistd.h.
dnl In these situations, we should not #include libc.h.
dnl This test arranges to #define LIBC_H_WITH_UNISTD_H iff libc.h is
dnl present on the system, and is safe to #include.
dnl
AC_DEFUN([GUILE_HEADER_LIBC_WITH_UNISTD],
  [
    AC_CHECK_HEADERS(libc.h unistd.h)
    AC_CACHE_CHECK(
      "whether libc.h and unistd.h can be included together",
      guile_cv_header_libc_with_unistd,
      [
        if test "$ac_cv_header_libc_h" = "no"; then
          guile_cv_header_libc_with_unistd="no"
        elif test "$ac_cv_header_unistd_h" = "no"; then
          guile_cv_header_libc_with_unistd="yes"
        else
          AC_TRY_COMPILE(
	    [
#             include <libc.h>
#             include <unistd.h>
	    ],
	    [],
	    [guile_cv_header_libc_with_unistd=yes],
	    [guile_cv_header_libc_with_unistd=no]
          )
        fi
      ]
    )
    if test "$guile_cv_header_libc_with_unistd" = yes; then
      AC_DEFINE(LIBC_H_WITH_UNISTD_H)
    fi
  ]
)


dnl This is needed when we want to check for the same function repeatedly
dnl with other parameters, such as libraries, varying.
dnl
dnl GUILE_NAMED_CHECK_FUNC(FUNCTION, TESTNAME,
dnl                        [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
AC_DEFUN(GUILE_NAMED_CHECK_FUNC,
[AC_MSG_CHECKING([for $1])
AC_CACHE_VAL(ac_cv_func_$1_$2,
[AC_TRY_LINK(
dnl Don't include <ctype.h> because on OSF/1 3.0 it includes <sys/types.h>
dnl which includes <sys/select.h> which contains a prototype for
dnl select.  Similarly for bzero.
[/* System header to define __stub macros and hopefully few prototypes,
    which can conflict with char $1(); below.  */
#include <assert.h>
/* Override any gcc2 internal prototype to avoid an error.  */
]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
extern "C"
#endif
])dnl
[/* We use char because int might match the return type of a gcc2
    builtin and then its argument prototype would still apply.  */
char $1();
], [
/* The GNU C library defines this for functions which it implements
    to always fail with ENOSYS.  Some functions are actually named
    something starting with __ and the normal name is an alias.  */
#if defined (__stub_$1) || defined (__stub___$1)
choke me
#else
$1();
#endif
], eval "ac_cv_func_$1_$2=yes", eval "ac_cv_func_$1_$2=no")])
if eval "test \"`echo '$ac_cv_func_'$1'_'$2`\" = yes"; then
  AC_MSG_RESULT(yes)
  ifelse([$3], , :, [$3])
else
  AC_MSG_RESULT(no)
ifelse([$4], , , [$4
])dnl
fi
])


dnl Check checks whether dlsym (if present) requires a leading underscore.
dnl Written by Dan Hagerty <hag@ai.mit.edu> for scsh-0.5.0.
AC_DEFUN(GUILE_DLSYM_USCORE, [
  AC_MSG_CHECKING(for underscore before symbols)
  AC_CACHE_VAL(guile_cv_uscore,[
    echo "main(){int i=1;}
    fnord(){int i=23; int ltuae=42;}" > conftest.c
    ${CC} conftest.c > /dev/null
    if (nm a.out | grep _fnord) > /dev/null; then
      guile_cv_uscore=yes
    else
      guile_cv_uscore=no
    fi])
  AC_MSG_RESULT($guile_cv_uscore)
  rm -f conftest.c a.out

  if test $guile_cv_uscore = yes; then
    AC_DEFINE(USCORE)

    if test $ac_cv_func_dlopen = yes -o $ac_cv_lib_dl_dlopen = yes ; then
	AC_MSG_CHECKING(whether dlsym always adds an underscore for us)
	AC_CACHE_VAL(guile_cv_dlsym_adds_uscore,AC_TRY_RUN( [
#include <dlfcn.h>
#include <stdio.h>
fnord() { int i=42;}
main() { void *self, *ptr1, *ptr2; self=dlopen(NULL,RTLD_LAZY);
    if(self) { ptr1=dlsym(self,"fnord"); ptr2=dlsym(self,"_fnord");
    if(ptr1 && !ptr2) exit(0); } exit(1); } 
], [guile_cv_dlsym_adds_uscore=yes
	AC_DEFINE(DLSYM_ADDS_USCORE) ], guile_cv_dlsym_adds_uscore=no,
	guile_cv_dlsym_adds_uscore=no))

        AC_MSG_RESULT($guile_cv_dlsym_adds_uscore)
    fi
  fi
])

dnl   QTHREADS_CONFIGURE configures the QuickThreads package.  The QT
dnl   sources should be in $srcdir/qt.  If configuration succeeds, this
dnl   macro creates the appropriate symlinks in the qt object directory,
dnl   and sets the following variables, used in building libqthreads.a:
dnl      QTHREAD_LTLIBS --- set to libqthreads.la if configuration
dnl         succeeds, or the empty string if configuration fails.
dnl      qtmd_h, qtmds_s, qtmdc_c, qtdmdb_s --- the names of the machine-
dnl         dependent source files.
dnl      qthread_asflags --- flags to pass to the compiler when processing
dnl         assembly-language files.
dnl
dnl   It also sets the following variables, which describe how clients
dnl   can link against libqthreads.a:
dnl      THREAD_PACKAGE --- set to "QT" if configuration succeeds, or
dnl         the empty string if configuration fails.
dnl	 THREAD_CPPFLAGS --- set to `-I' flags for thread header files
dnl	 THREAD_LIBS_LOCAL --- linker options for use in this source tree
dnl	 THREAD_LIBS_INSTALLED --- linker options for use after this package
dnl	    is installed
dnl   It would be nice if all thread configuration packages for Guile
dnl   followed the same conventions.
dnl
dnl   All of the above variables will be substituted into Makefiles in
dnl   the usual autoconf fashion.
dnl
dnl   We distinguish between THREAD_LIBS_LOCAL and
dnl   THREAD_LIBS_INSTALLED because the thread library might be in
dnl   this tree, and be built using libtool.  This means that:
dnl	 1) when building other executables in this tree, one must
dnl	    pass the relative path to the ../libfoo.la file, but 
dnl	 2) once the whole package has been installed, users should
dnl	    link using -lfoo. 
dnl   Normally, we only care about the first case, but since the
dnl   guile-config script needs to give users all the flags they need
dnl   to link programs against guile, the GUILE_WITH_THREADS macro
dnl   needs to supply the second piece of information as well.
dnl
dnl   This whole thing is a little confused about what ought to be
dnl   done in the top-level configure script, and what ought to be
dnl   taken care of in the subdirectory.  For example, qtmds_s and
dnl   friends really ought not to be even mentioned in the top-level
dnl   configure script, but here they are.

AC_DEFUN([QTHREADS_CONFIGURE],[
  AC_REQUIRE([AC_PROG_LN_S])

  AC_MSG_CHECKING(QuickThreads configuration)
  # How can we refer to the qt source directory from within the qt build
  # directory?  For headers, we can rely on the fact that the qt src
  # directory appears in the #include path.
  qtsrcdir="`(cd $srcdir; pwd)`/qt"

  changequote(,)dnl We use [ and ] in a regexp in the case

  THREAD_PACKAGE=QT
  qthread_asflags=''
  case "$host" in
    i[3456]86-*-*)
      port_name=i386
      qtmd_h=md/i386.h
      qtmds_s=md/i386.s
      qtmdc_c=md/null.c 
      qtdmdb_s=
      case "$host" in
        *-*-netbsd* )
          ## NetBSD needs to be told to pass the assembly code through
          ## the C preprocessor.  Other GCC installations seem to do
          ## this by default, but NetBSD's doesn't.  We could get the
          ## same effect by giving the file a name ending with .S
          ## instead of .s, but I don't see how to tell automake to do
          ## that.
          qthread_asflags='-x assembler-with-cpp'
        ;;
      esac
      ;;
    mips-sgi-irix[56]*)
      port_name=irix
      qtmd_h=md/mips.h
      qtmds_s=md/mips-irix5.s
      qtmdc_c=md/null.c
      qtdmdb_s=md/mips_b.s 
      ;;
    mips-*-*)
      port_name=mips
      qtmd_h=md/mips.h
      qtmds_s=md/mips.s
      qtmdc_c=md/null.c
      qtdmdb_s=md/mips_b.s 
      ;;
    sparc-*-sunos*)
      port_name=sparc-sunos
      qtmd_h=md/sparc.h
      qtmds_s=md/_sparc.s
      qtmdc_c=md/null.c
      qtdmdb_s=md/_sparc_b.s 
      ;;
    sparc-*-*)
      port_name=sparc
      qtmd_h=md/sparc.h
      qtmds_s=md/sparc.s
      qtmdc_c=md/null.c
      qtdmdb_s=md/sparc_b.s 
      ;;
    alpha*-*-*)
      port_name=alpha
      qtmd_h=md/axp.h
      qtmds_s=md/axp.s
      qtmdc_c=md/null.c
      qtdmdb_s=md/axp_b.s 
      ;;
    *)
      echo "Unknown configuration; threads package disabled"
      THREAD_PACKAGE=""
      ;;
  esac
  changequote([, ])

  # Did configuration succeed?
  if test -n "$THREAD_PACKAGE"; then
    AC_MSG_RESULT($port_name)
    QTHREAD_LTLIBS=libqthreads.la
    THREAD_CPPFLAGS="-I$qtsrcdir -I../qt"
    THREAD_LIBS_LOCAL="../qt/libqthreads.la"
    THREAD_LIBS_INSTALLED="-lqthreads"
  else
    AC_MSG_RESULT(none; disabled)
  fi

  AC_SUBST(QTHREAD_LTLIBS)
  AC_SUBST(qtmd_h)
  AC_SUBST(qtmds_s)
  AC_SUBST(qtmdc_c)
  AC_SUBST(qtdmdb_s)
  AC_SUBST(qthread_asflags)
  AC_SUBST(THREAD_PACKAGE)
  AC_SUBST(THREAD_CPPFLAGS)
  AC_SUBST(THREAD_LIBS_LOCAL)
  AC_SUBST(THREAD_LIBS_INSTALLED)
])
Commit	Line	Data
3a629497 JB	1	dnl On the NeXT, #including <utime.h> doesn't give you a definition for
	2	dnl struct utime, unless you #define _POSIX_SOURCE.
	3
	4	AC_DEFUN(GUILE_STRUCT_UTIMBUF, [
	5	AC_CACHE_CHECK([whether we need POSIX to get struct utimbuf],
	6	guile_cv_struct_utimbuf_needs_posix,
	7	[AC_TRY_CPP([
	8	#ifdef __EMX__
	9	#include <sys/utime.h>
	10	#else
	11	#include <utime.h>
	12	#endif
	13	struct utime blah;
	14	],
	15	guile_cv_struct_utimbuf_needs_posix=no,
	16	guile_cv_struct_utimbuf_needs_posix=yes)])
	17	if test "$guile_cv_struct_utimbuf_needs_posix" = yes; then
	18	AC_DEFINE(UTIMBUF_NEEDS_POSIX)
	19	fi])
	20
	21
	22
	23
	24	dnl
	25	dnl Apparently, at CMU they have a weird version of libc.h that is
	26	dnl installed in /usr/local/include and conflicts with unistd.h.
	27	dnl In these situations, we should not #include libc.h.
	28	dnl This test arranges to #define LIBC_H_WITH_UNISTD_H iff libc.h is
	29	dnl present on the system, and is safe to #include.
	30	dnl
	31	AC_DEFUN([GUILE_HEADER_LIBC_WITH_UNISTD],
	32	[
	33	AC_CHECK_HEADERS(libc.h unistd.h)
	34	AC_CACHE_CHECK(
	35	"whether libc.h and unistd.h can be included together",
	36	guile_cv_header_libc_with_unistd,
	37	[
	38	if test "$ac_cv_header_libc_h" = "no"; then
	39	guile_cv_header_libc_with_unistd="no"
42d0ffc9	40	elif test "$ac_cv_header_unistd_h" = "no"; then
3a629497 JB	41	guile_cv_header_libc_with_unistd="yes"
	42	else
	43	AC_TRY_COMPILE(
	44	[
	45	# include <libc.h>
	46	# include <unistd.h>
	47	],
	48	[],
	49	[guile_cv_header_libc_with_unistd=yes],
	50	[guile_cv_header_libc_with_unistd=no]
	51	)
	52	fi
	53	]
	54	)
	55	if test "$guile_cv_header_libc_with_unistd" = yes; then
	56	AC_DEFINE(LIBC_H_WITH_UNISTD_H)
	57	fi
	58	]
	59	)
0b89e78e MD	60
	61
	62
	63	dnl This is needed when we want to check for the same function repeatedly
	64	dnl with other parameters, such as libraries, varying.
	65	dnl
	66	dnl GUILE_NAMED_CHECK_FUNC(FUNCTION, TESTNAME,
	67	dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
	68	AC_DEFUN(GUILE_NAMED_CHECK_FUNC,
	69	[AC_MSG_CHECKING([for $1])
	70	AC_CACHE_VAL(ac_cv_func_$1_$2,
	71	[AC_TRY_LINK(
	72	dnl Don't include <ctype.h> because on OSF/1 3.0 it includes <sys/types.h>
	73	dnl which includes <sys/select.h> which contains a prototype for
	74	dnl select. Similarly for bzero.
	75	[/* System header to define __stub macros and hopefully few prototypes,
	76	which can conflict with char $1(); below. */
	77	#include <assert.h>
	78	/* Override any gcc2 internal prototype to avoid an error. */
	79	]ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus
	80	extern "C"
	81	#endif
	82	])dnl
	83	[/* We use char because int might match the return type of a gcc2
	84	builtin and then its argument prototype would still apply. */
	85	char $1();
	86	], [
	87	/* The GNU C library defines this for functions which it implements
	88	to always fail with ENOSYS. Some functions are actually named
	89	something starting with __ and the normal name is an alias. */
	90	#if defined (__stub_$1) \|\| defined (__stub___$1)
	91	choke me
	92	#else
	93	$1();
	94	#endif
	95	], eval "ac_cv_func_$1_$2=yes", eval "ac_cv_func_$1_$2=no")])
	96	if eval "test \"`echo '$ac_cv_func_'$1'_'$2`\" = yes"; then
	97	AC_MSG_RESULT(yes)
	98	ifelse([$3], , :, [$3])
	99	else
	100	AC_MSG_RESULT(no)
	101	ifelse([$4], , , [$4
	102	])dnl
	103	fi
	104	])
2a0d7176 TP	105
	106
	107
	108	dnl Check checks whether dlsym (if present) requires a leading underscore.
	109	dnl Written by Dan Hagerty <hag@ai.mit.edu> for scsh-0.5.0.
	110	AC_DEFUN(GUILE_DLSYM_USCORE, [
	111	AC_MSG_CHECKING(for underscore before symbols)
	112	AC_CACHE_VAL(guile_cv_uscore,[
	113	echo "main(){int i=1;}
	114	fnord(){int i=23; int ltuae=42;}" > conftest.c
	115	${CC} conftest.c > /dev/null
	116	if (nm a.out \| grep _fnord) > /dev/null; then
	117	guile_cv_uscore=yes
	118	else
	119	guile_cv_uscore=no
	120	fi])
	121	AC_MSG_RESULT($guile_cv_uscore)
	122	rm -f conftest.c a.out
	123
	124	if test $guile_cv_uscore = yes; then
	125	AC_DEFINE(USCORE)
	126
	127	if test $ac_cv_func_dlopen = yes -o $ac_cv_lib_dl_dlopen = yes ; then
	128	AC_MSG_CHECKING(whether dlsym always adds an underscore for us)
	129	AC_CACHE_VAL(guile_cv_dlsym_adds_uscore,AC_TRY_RUN( [
	130	#include <dlfcn.h>
	131	#include <stdio.h>
	132	fnord() { int i=42;}
	133	main() { void self, ptr1, *ptr2; self=dlopen(NULL,RTLD_LAZY);
	134	if(self) { ptr1=dlsym(self,"fnord"); ptr2=dlsym(self,"_fnord");
	135	if(ptr1 && !ptr2) exit(0); } exit(1); }
	136	], [guile_cv_dlsym_adds_uscore=yes
774b7f22 TP	137	AC_DEFINE(DLSYM_ADDS_USCORE) ], guile_cv_dlsym_adds_uscore=no,
774b7f22 TP	138	guile_cv_dlsym_adds_uscore=no))
2a0d7176 TP	139
	140	AC_MSG_RESULT($guile_cv_dlsym_adds_uscore)
	141	fi
	142	fi
	143	])
eb9ef08b MD	144
	145	dnl QTHREADS_CONFIGURE configures the QuickThreads package. The QT
	146	dnl sources should be in $srcdir/qt. If configuration succeeds, this
	147	dnl macro creates the appropriate symlinks in the qt object directory,
	148	dnl and sets the following variables, used in building libqthreads.a:
	149	dnl QTHREAD_LTLIBS --- set to libqthreads.la if configuration
	150	dnl succeeds, or the empty string if configuration fails.
	151	dnl qtmd_h, qtmds_s, qtmdc_c, qtdmdb_s --- the names of the machine-
	152	dnl dependent source files.
	153	dnl qthread_asflags --- flags to pass to the compiler when processing
	154	dnl assembly-language files.
	155	dnl
	156	dnl It also sets the following variables, which describe how clients
	157	dnl can link against libqthreads.a:
	158	dnl THREAD_PACKAGE --- set to "QT" if configuration succeeds, or
	159	dnl the empty string if configuration fails.
	160	dnl THREAD_CPPFLAGS --- set to `-I' flags for thread header files
	161	dnl THREAD_LIBS_LOCAL --- linker options for use in this source tree
	162	dnl THREAD_LIBS_INSTALLED --- linker options for use after this package
	163	dnl is installed
	164	dnl It would be nice if all thread configuration packages for Guile
	165	dnl followed the same conventions.
	166	dnl
	167	dnl All of the above variables will be substituted into Makefiles in
	168	dnl the usual autoconf fashion.
	169	dnl
	170	dnl We distinguish between THREAD_LIBS_LOCAL and
	171	dnl THREAD_LIBS_INSTALLED because the thread library might be in
	172	dnl this tree, and be built using libtool. This means that:
	173	dnl 1) when building other executables in this tree, one must
	174	dnl pass the relative path to the ../libfoo.la file, but
	175	dnl 2) once the whole package has been installed, users should
	176	dnl link using -lfoo.
	177	dnl Normally, we only care about the first case, but since the
	178	dnl guile-config script needs to give users all the flags they need
	179	dnl to link programs against guile, the GUILE_WITH_THREADS macro
	180	dnl needs to supply the second piece of information as well.
	181	dnl
	182	dnl This whole thing is a little confused about what ought to be
	183	dnl done in the top-level configure script, and what ought to be
	184	dnl taken care of in the subdirectory. For example, qtmds_s and
	185	dnl friends really ought not to be even mentioned in the top-level
	186	dnl configure script, but here they are.
	187
	188	AC_DEFUN([QTHREADS_CONFIGURE],[
	189	AC_REQUIRE([AC_PROG_LN_S])
	190
	191	AC_MSG_CHECKING(QuickThreads configuration)
	192	# How can we refer to the qt source directory from within the qt build
	193	# directory? For headers, we can rely on the fact that the qt src
	194	# directory appears in the #include path.
	195	qtsrcdir="`(cd $srcdir; pwd)`/qt"
	196
	197	changequote(,)dnl We use [ and ] in a regexp in the case
	198
	199	THREAD_PACKAGE=QT
	200	qthread_asflags=''
	201	case "$host" in
	202	i[3456]86--)
	203	port_name=i386
	204	qtmd_h=md/i386.h
	205	qtmds_s=md/i386.s
	206	qtmdc_c=md/null.c
	207	qtdmdb_s=
208	case "$host" in
209	--netbsd* )
210	## NetBSD needs to be told to pass the assembly code through
211	## the C preprocessor. Other GCC installations seem to do
212	## this by default, but NetBSD's doesn't. We could get the
213	## same effect by giving the file a name ending with .S
214	## instead of .s, but I don't see how to tell automake to do
215	## that.
216	qthread_asflags='-x assembler-with-cpp'
217	;;
218	esac
219	;;
220	mips-sgi-irix[56]*)
221	port_name=irix
222	qtmd_h=md/mips.h
223	qtmds_s=md/mips-irix5.s
224	qtmdc_c=md/null.c
225	qtdmdb_s=md/mips_b.s
226	;;
227	mips--)
228	port_name=mips
229	qtmd_h=md/mips.h
230	qtmds_s=md/mips.s
231	qtmdc_c=md/null.c
232	qtdmdb_s=md/mips_b.s
233	;;
234	sparc--sunos)
235	port_name=sparc-sunos
236	qtmd_h=md/sparc.h
237	qtmds_s=md/_sparc.s
238	qtmdc_c=md/null.c
239	qtdmdb_s=md/_sparc_b.s
240	;;
241	sparc--)
242	port_name=sparc
243	qtmd_h=md/sparc.h
244	qtmds_s=md/sparc.s
245	qtmdc_c=md/null.c
246	qtdmdb_s=md/sparc_b.s
247	;;
6f9f0fb9	248	alpha--*)
eb9ef08b MD	249	port_name=alpha
	250	qtmd_h=md/axp.h
	251	qtmds_s=md/axp.s
	252	qtmdc_c=md/null.c
	253	qtdmdb_s=md/axp_b.s
	254	;;
	255	*)
	256	echo "Unknown configuration; threads package disabled"
	257	THREAD_PACKAGE=""
	258	;;
	259	esac
	260	changequote([, ])
	261
	262	# Did configuration succeed?
	263	if test -n "$THREAD_PACKAGE"; then
	264	AC_MSG_RESULT($port_name)
	265	QTHREAD_LTLIBS=libqthreads.la
	266	THREAD_CPPFLAGS="-I$qtsrcdir -I../qt"
	267	THREAD_LIBS_LOCAL="../qt/libqthreads.la"
	268	THREAD_LIBS_INSTALLED="-lqthreads"
	269	else
	270	AC_MSG_RESULT(none; disabled)
	271	fi
	272
	273	AC_SUBST(QTHREAD_LTLIBS)
	274	AC_SUBST(qtmd_h)
	275	AC_SUBST(qtmds_s)
	276	AC_SUBST(qtmdc_c)
	277	AC_SUBST(qtdmdb_s)
	278	AC_SUBST(qthread_asflags)
	279	AC_SUBST(THREAD_PACKAGE)
	280	AC_SUBST(THREAD_CPPFLAGS)
	281	AC_SUBST(THREAD_LIBS_LOCAL)
	282	AC_SUBST(THREAD_LIBS_INSTALLED)
	283	])