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dnl
dnl $Id: aczsh.m4,v 3.1.2.3 1997/05/04 06:16:44 hzoli Exp $
dnl
dnl Autconf tests for zsh.
dnl
dnl Copyright (c) 1995-1997 Richard Coleman
dnl All rights reserved.
dnl
dnl Permission is hereby granted, without written agreement and without
dnl license or royalty fees, to use, copy, modify, and distribute this
dnl software and to distribute modified versions of this software for any
dnl purpose, provided that the above copyright notice and the following
dnl two paragraphs appear in all copies of this software.
dnl
dnl In no event shall Richard Coleman or the Zsh Development Group be liable
dnl to any party for direct, indirect, special, incidental, or consequential
dnl damages arising out of the use of this software and its documentation,
dnl even if Richard Coleman and the Zsh Development Group have been advised of
dnl the possibility of such damage.
dnl
dnl Richard Coleman and the Zsh Development Group specifically disclaim any
dnl warranties, including, but not limited to, the implied warranties of
dnl merchantability and fitness for a particular purpose. The software
dnl provided hereunder is on an "as is" basis, and Richard Coleman and the
dnl Zsh Development Group have no obligation to provide maintenance,
dnl support, updates, enhancements, or modifications.
AC_DEFUN(zsh_SYS_DYNAMIC_CLASH,
[AC_CACHE_CHECK([if name clashes in shared objects are OK],
zsh_cv_sys_dynamic_clash_ok,
[if test "$zsh_cv_func_dlsym_needs_underscore" = yes; then
us=_
else
us=
fi
echo 'int fred () { return 42; }' > conftest1.c
echo 'int fred () { return 69; }' > conftest2.c
if $CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest1.c 1>&5 2>&5 &&
$DLLD -o conftest1.$DL_EXT $LDFLAGS $DLLDFLAGS conftest1.o 1>&5 2>&5 &&
$CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest2.c 1>&5 2>&5 &&
$DLLD -o conftest2.$DL_EXT $LDFLAGS $DLLDFLAGS conftest2.o 1>&5 2>&5; then
AC_TRY_RUN([
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
#include <sys/types.h>
#include <nlist.h>
#include <link.h>
#endif
#ifndef RTLD_LAZY
#define RTLD_LAZY 1
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
main()
{
void *handle1, *handle2;
int (*fred1)(), (*fred2)();
handle1 = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
if(!handle1) exit(1);
handle2 = dlopen("./conftest2.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
if(!handle2) exit(1);
fred1 = (int (*)()) dlsym(handle1, "${us}fred");
fred2 = (int (*)()) dlsym(handle2, "${us}fred");
if(!fred1 || !fred2) exit(1);
exit((*fred1)() != 42 || (*fred2)() != 69);
}
], [zsh_cv_sys_dynamic_clash_ok=yes],
[zsh_cv_sys_dynamic_clash_ok=no],
[zsh_cv_sys_dynamic_clash_ok=no]
)
else
zsh_cv_sys_dynamic_clash_ok=no
fi
])
if test "$zsh_cv_sys_dynamic_clash_ok" = yes; then
AC_DEFINE(DYNAMIC_NAME_CLASH_OK)
fi
])
AC_DEFUN(zsh_SYS_DYNAMIC_GLOBAL,
[AC_CACHE_CHECK([for working RTLD_GLOBAL],
zsh_cv_sys_dynamic_rtld_global,
[if test "$zsh_cv_func_dlsym_needs_underscore" = yes; then
us=_
else
us=
fi
echo 'int fred () { return 42; }' > conftest1.c
echo 'extern int fred(); int barney () { return fred() + 27; }' > conftest2.c
if $CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest1.c 1>&5 2>&5 &&
$DLLD -o conftest1.$DL_EXT $LDFLAGS $DLLDFLAGS conftest1.o 1>&5 2>&5 &&
$CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest2.c 1>&5 2>&5 &&
$DLLD -o conftest2.$DL_EXT $LDFLAGS $DLLDFLAGS conftest2.o 1>&5 2>&5; then
AC_TRY_RUN([
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
#include <sys/types.h>
#include <nlist.h>
#include <link.h>
#endif
#ifndef RTLD_LAZY
#define RTLD_LAZY 1
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
main()
{
void *handle;
int (*barneysym)();
handle = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
if(!handle) exit(1);
handle = dlopen("./conftest2.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
if(!handle) exit(1);
barneysym = (int (*)()) dlsym(handle, "${us}barney");
if(!barneysym) exit(1);
exit((*barneysym)() != 69);
}
], [zsh_cv_sys_dynamic_rtld_global=yes],
[zsh_cv_sys_dynamic_rtld_global=no],
[zsh_cv_sys_dynamic_rtld_global=no]
)
else
zsh_cv_sys_dynamic_rtld_global=no
fi
])
])
AC_DEFUN(zsh_SYS_DYNAMIC_EXECSYMS,
[AC_CACHE_CHECK([whether symbols in the executable are available],
zsh_cv_sys_dynamic_execsyms,
[if test "$zsh_cv_func_dlsym_needs_underscore" = yes; then
us=_
else
us=
fi
echo 'extern int fred(); int barney () { return fred() + 27; }' > conftest1.c
if $CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest1.c 1>&5 2>&5 &&
$DLLD -o conftest1.$DL_EXT $LDFLAGS $DLLDFLAGS conftest1.o 1>&5 2>&5; then
save_ldflags=$LDFLAGS
LDFLAGS="$LDFLAGS $EXTRA_LDFLAGS"
AC_TRY_RUN([
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
#include <sys/types.h>
#include <nlist.h>
#include <link.h>
#endif
#ifndef RTLD_LAZY
#define RTLD_LAZY 1
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
main()
{
void *handle;
int (*barneysym)();
handle = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
if(!handle) exit(1);
barneysym = (int (*)()) dlsym(handle, "${us}barney");
if(!barneysym) exit(1);
exit((*barneysym)() != 69);
}
int fred () { return 42; }
], [zsh_cv_sys_dynamic_execsyms=yes],
[zsh_cv_sys_dynamic_execsyms=no],
[zsh_cv_sys_dynamic_execsyms=no]
)
LDFLAGS=$save_ldflags
else
zsh_cv_sys_dynamic_execsyms=no
fi
])
])
AC_DEFUN(zsh_SYS_DYNAMIC_STRIP_EXE,
[AC_REQUIRE([zsh_SYS_DYNAMIC_EXECSYMS])
AC_CACHE_CHECK([whether executables can be stripped],
zsh_cv_sys_dynamic_strip_exe,
[if test "$zsh_cv_sys_dynamic_execsyms" != yes; then
zsh_cv_sys_dynamic_strip_exe=yes
elif
if test "$zsh_cv_func_dlsym_needs_underscore" = yes; then
us=_
else
us=
fi
echo 'extern int fred(); int barney() { return fred() + 27; }' > conftest1.c
$CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest1.c 1>&5 2>&5 &&
$DLLD -o conftest1.$DL_EXT $LDFLAGS $DLLDFLAGS conftest1.o 1>&5 2>&5; then
save_ldflags=$LDFLAGS
LDFLAGS="$LDFLAGS $EXTRA_LDFLAGS -s"
AC_TRY_RUN([
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
#include <sys/types.h>
#include <nlist.h>
#include <link.h>
#endif
#ifndef RTLD_LAZY
#define RTLD_LAZY 1
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
main()
{
void *handle;
int (*barneysym)();
handle = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
if(!handle) exit(1);
barneysym = (int (*)()) dlsym(handle, "${us}barney");
if(!barneysym) exit(1);
exit((*barneysym)() != 69);
}
int fred () { return 42; }
], [zsh_cv_sys_dynamic_strip_exe=yes],
[zsh_cv_sys_dynamic_strip_exe=no],
[zsh_cv_sys_dynamic_strip_exe=no]
)
LDFLAGS=$save_ldflags
else
zsh_cv_sys_dynamic_strip_exe=no
fi
])
])
AC_DEFUN(zsh_SYS_DYNAMIC_STRIP_LIB,
[AC_CACHE_CHECK([whether libraries can be stripped],
zsh_cv_sys_dynamic_strip_lib,
[if test "$zsh_cv_func_dlsym_needs_underscore" = yes; then
us=_
else
us=
fi
echo 'int fred () { return 42; }' > conftest1.c
if $CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest1.c 1>&5 2>&5 &&
$DLLD -o conftest1.$DL_EXT $LDFLAGS $DLLDFLAGS -s conftest1.o 1>&5 2>&5; then
AC_TRY_RUN([
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
#include <sys/types.h>
#include <nlist.h>
#include <link.h>
#endif
#ifndef RTLD_LAZY
#define RTLD_LAZY 1
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
main()
{
void *handle;
int (*fredsym)();
handle = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
if(!handle) exit(1);
fredsym = (int (*)()) dlsym(handle, "${us}fred");
if(!fredsym) exit(1);
exit((*fredsym)() != 42);
}
], [zsh_cv_sys_dynamic_strip_lib=yes],
[zsh_cv_sys_dynamic_strip_lib=no],
[zsh_cv_sys_dynamic_strip_lib=no]
)
else
zsh_cv_sys_dynamic_strip_lib=no
fi
])
])
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