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zsh/aczsh.m4
1999-04-15 18:05:35 +00:00

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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.
dnl
dnl
dnl zsh_SYS_DYNAMIC_BROKEN
dnl Check whether static/shared library linking is broken.
dnl
dnl On some systems, static modifiable library symbols (such as environ)
dnl may appear only in statically linked libraries. If this is the case,
dnl then two shared libraries that reference the same symbol, each linked
dnl with the static library, could be given distinct copies of the symbol.
dnl If this is the case then dynamic linking is FUBAR.
dnl
AC_DEFUN(zsh_SYS_DYNAMIC_BROKEN,
[AC_CACHE_CHECK([if static/shared library linking is broken],
zsh_cv_sys_dynamic_broken,
[if test "$zsh_cv_func_dlsym_needs_underscore" = yes; then
us=_
else
us=
fi
echo '
extern char **environ;
void *symlist1[] = {
(void *)&environ,
(void *)0
};
' > conftest1.c
sed 's/symlist1/symlist2/' < conftest1.c > conftest2.c
if $CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest1.c 1>&5 2>&5 &&
$DLLD -o conftest1.$DL_EXT $LDFLAGS $DLLDFLAGS conftest1.o $LIBS 1>&5 2>&5 &&
$CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest2.c 1>&5 2>&5 &&
$DLLD -o conftest2.$DL_EXT $LDFLAGS $DLLDFLAGS conftest2.o $LIBS 1>&5 2>&5; then
AC_TRY_RUN([
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
#include <sys/types.h>
#include <nlist.h>
#include <link.h>
#endif
#ifndef RTLD_LAZY
#define RTLD_LAZY 1
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
main()
{
void *handle1, *handle2;
void **symlist1, **symlist2;
handle1 = dlopen("./conftest1.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
if(!handle1) exit(1);
handle2 = dlopen("./conftest2.$DL_EXT", RTLD_LAZY | RTLD_GLOBAL);
if(!handle2) exit(1);
symlist1 = (void **) dlsym(handle1, "${us}symlist1");
symlist2 = (void **) dlsym(handle2, "${us}symlist2");
if(!symlist1 || !symlist2) exit(1);
for(; *symlist1; symlist1++, symlist2++)
if(*symlist1 != *symlist2)
exit(1);
exit(0);
}
], [zsh_cv_sys_dynamic_broken=no],
[zsh_cv_sys_dynamic_broken=yes],
[zsh_cv_sys_dynamic_broken=yes]
)
else
zsh_cv_sys_dynamic_broken=yes
fi
])
])
dnl
dnl zsh_SYS_DYNAMIC_CLASH
dnl Check whether symbol name clashes in shared libraries are acceptable.
dnl
AC_DEFUN(zsh_SYS_DYNAMIC_CLASH,
[AC_CACHE_CHECK([if name clashes in shared objects are OK],
zsh_cv_sys_dynamic_clash_ok,
[if test "$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 $LIBS 1>&5 2>&5 &&
$CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest2.c 1>&5 2>&5 &&
$DLLD -o conftest2.$DL_EXT $LDFLAGS $DLLDFLAGS conftest2.o $LIBS 1>&5 2>&5; then
AC_TRY_RUN([
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
#include <sys/types.h>
#include <nlist.h>
#include <link.h>
#endif
#ifndef RTLD_LAZY
#define RTLD_LAZY 1
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
main()
{
void *handle1, *handle2;
int (*fred1)(), (*fred2)();
handle1 = dlopen("./conftest1.$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
])
dnl
dnl zsh_SYS_DYNAMIC_GLOBAL
dnl Check whether symbols in one dynamically loaded library are
dnl available to another dynamically loaded library.
dnl
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 $LIBS 1>&5 2>&5 &&
$CC -c $CFLAGS $CPPFLAGS $DLCFLAGS conftest2.c 1>&5 2>&5 &&
$DLLD -o conftest2.$DL_EXT $LDFLAGS $DLLDFLAGS conftest2.o $LIBS 1>&5 2>&5; then
AC_TRY_RUN([
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
#include <sys/types.h>
#include <nlist.h>
#include <link.h>
#endif
#ifndef RTLD_LAZY
#define RTLD_LAZY 1
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
main()
{
void *handle;
int (*barneysym)();
handle = dlopen("./conftest1.$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
])
])
dnl
dnl zsh_SYS_DYNAMIC_EXECSYMS
dnl Check whether symbols in the executable are available to dynamically
dnl loaded libraries.
dnl
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 $LIBS 1>&5 2>&5; then
save_ldflags=$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
])
])
dnl
dnl zsh_SYS_DYNAMIC_STRIP_EXE
dnl Check whether it is safe to strip executables.
dnl
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 $LIBS 1>&5 2>&5; then
save_ldflags=$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
])
])
dnl
dnl zsh_SYS_DYNAMIC_STRIP_EXE
dnl Check whether it is safe to strip dynamically loaded libraries.
dnl
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 $LIBS 1>&5 2>&5; then
AC_TRY_RUN([
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#else
#include <sys/types.h>
#include <nlist.h>
#include <link.h>
#endif
#ifndef RTLD_LAZY
#define RTLD_LAZY 1
#endif
#ifndef RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
main()
{
void *handle;
int (*fredsym)();
handle = dlopen("./conftest1.$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
])
])
dnl
dnl zsh_PATH_UTMP(filename)
dnl Search for a specified utmp-type file.
dnl
AC_DEFUN(zsh_PATH_UTMP,
[AC_CACHE_CHECK([for $1 file], [zsh_cv_path_$1],
[for dir in /etc /usr/etc /var/adm /usr/adm /var/run ./conftest; do
zsh_cv_path_$1=${dir}/$1
test -f $zsh_cv_path_$1 && break
zsh_cv_path_$1=no
done
])
if test $zsh_cv_path_$1 != no; then
AC_DEFINE_UNQUOTED(PATH_[]translit($1, [a-z], [A-Z])[]_FILE, "$zsh_cv_path_$1")
fi
])
dnl
dnl zsh_TYPE_EXISTS(#includes, type name)
dnl Check whether a specified type exists.
dnl
AC_DEFUN(zsh_TYPE_EXISTS,
[AC_CACHE_CHECK([for $2], [zsh_cv_type_exists_[]translit($2, [ ], [_])],
[AC_TRY_COMPILE([$1], [$2 testvar;],
[zsh_cv_type_exists_[]translit($2, [ ], [_])=yes],
[zsh_cv_type_exists_[]translit($2, [ ], [_])=no])
])
if test $zsh_cv_type_exists_[]translit($2, [ ], [_]) = yes; then
AC_DEFINE(HAVE_[]translit($2, [ a-z], [_A-Z]))
fi
])
dnl
dnl zsh_STRUCT_MEMBER(#includes, type name, member name)
dnl Check whether a specified aggregate type exists and contains
dnl a specified member.
dnl
AC_DEFUN(zsh_STRUCT_MEMBER,
[AC_CACHE_CHECK([for $3 in $2], [zsh_cv_struct_member_[]translit($2, [ ], [_])_$3],
[AC_TRY_COMPILE([$1], [$2 testvar; testvar.$3;],
[zsh_cv_struct_member_[]translit($2, [ ], [_])_$3=yes],
[zsh_cv_struct_member_[]translit($2, [ ], [_])_$3=no])
])
if test $zsh_cv_struct_member_[]translit($2, [ ], [_])_$3 = yes; then
AC_DEFINE(HAVE_[]translit($2_$3, [ a-z], [_A-Z]))
fi
])
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