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* ltdl.m4 (AC_LTDL_DLLIB) [sco3.2*]: When searching for a dlopen

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implementation, and adding `-ldl' has failed, try linking a call
to dlopen, #including dlfcn.h, and without -ldl.  On sco3.2 the
header files redefines the interface symbols to point at the
implementation symbols in libc.
Reported by "Golubev I. N." <gin@mo.msk.ru>
This commit is contained in:
Gary V. Vaughan 2001-06-30 00:40:38 +00:00
parent 4925d0771e
commit fdec1c1137
2 changed files with 42 additions and 22 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2001-06-30 Gary V. Vaughan <gary@gnu.org>
* ltdl.m4 (AC_LTDL_DLLIB) [sco3.2*]: When searching for a dlopen
implementation, and adding `-ldl' has failed, try linking a call
to dlopen, #including dlfcn.h, and without -ldl. On sco3.2 the
header files redefines the interface symbols to point at the
implementation symbols in libc.
Reported by "Golubev I. N." <gin@mo.msk.ru>
2001-06-29 Tim Van Holder <tim.van.holder@pandora.be>
General cleanup of autoconf-2.50 upgrade:

55
ltdl.m4
View File

@ -190,31 +190,42 @@ fi
# -------------
AC_DEFUN(AC_LTDL_DLLIB,
[LIBADD_DL=
AC_CHECK_LIB(dl, dlopen, [AC_DEFINE(HAVE_LIBDL, 1,
[Define if you have the libdl library or equivalent. ]) LIBADD_DL="-ldl"],
[AC_CHECK_FUNC(dlopen, [AC_DEFINE(HAVE_LIBDL, 1,
[Define if you have the libdl library or equivalent.])],
[AC_CHECK_LIB(svld, dlopen, [AC_DEFINE(HAVE_LIBDL, 1,
[Define if you have the libdl library or equivalent.]) LIBADD_DL="-lsvld"]
)])])
AC_CHECK_FUNC(shl_load, [AC_DEFINE(HAVE_SHL_LOAD, 1,
[Define if you have the shl_load function.])],
[AC_CHECK_LIB(dld, shl_load,
[AC_DEFINE(HAVE_SHL_LOAD, 1,
[Define if you have the shl_load function.])
LIBADD_DL="$LIBADD_DL -ldld"])
])
AC_CHECK_LIB(dld, dld_link, [AC_DEFINE(HAVE_DLD, 1,
[Define if you have the GNU dld library.])dnl
test "x$ac_cv_lib_dld_shl_load" = yes || LIBADD_DL="$LIBADD_DL -ldld"])
AC_SUBST(LIBADD_DL)
AC_LANG_PUSH([C])
AC_CHECK_LIB(dl, dlopen,
[AC_DEFINE(HAVE_LIBDL, 1,
[Define if you have the libdl library or equivalent. ])
LIBADD_DL="-ldl"],
[AC_TRY_LINK([#if HAVE_DLFCN_H
# include <dlfcn.h>
#endif
], [dlopen();],
[AC_DEFINE(HAVE_LIBDL, 1,
[Define if you have the libdl library or equivalent.])],
[AC_CHECK_LIB(svld, dlopen,
[AC_DEFINE(HAVE_LIBDL, 1,
[Define if you have the libdl library or equivalent.])
LIBADD_DL="-lsvld"])])])
if test "x$ac_cv_func_dlopen" = xyes || test "x$ac_cv_lib_dl_dlopen" = xyes; then
LIBS_SAVE="$LIBS"
LIBS="$LIBS $LIBADD_DL"
AC_CHECK_FUNCS(dlerror)
LIBS="$LIBS_SAVE"
AC_CHECK_FUNC(shl_load,
[AC_DEFINE(HAVE_SHL_LOAD, 1, [Define if you have the shl_load function.])],
[AC_CHECK_LIB(dld, shl_load,
[AC_DEFINE(HAVE_SHL_LOAD, 1, [Define if you have the shl_load function.])
LIBADD_DL="$LIBADD_DL -ldld"])])
AC_CHECK_LIB(dld, dld_link,
[AC_DEFINE(HAVE_DLD, 1, [Define if you have the GNU dld library.])
test "x$ac_cv_lib_dld_shl_load" = yes || LIBADD_DL="$LIBADD_DL -ldld"])
if test "x$ac_cv_func_dlopen" = xyes || test "x$ac_cv_lib_dl_dlopen" = xyes
then
lt_save_LIBS="$LIBS"
LIBS="$LIBS $LIBADD_DL"
AC_CHECK_FUNCS(dlerror)
LIBS="$lt_save_LIBS"
fi
AC_LANG_POP
])# AC_LTDL_DLLIB
# AC_LTDL_SYMBOL_USCORE