mirror of
git://git.savannah.gnu.org/libtool.git
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e1d24d3b02
old-fashioned archive, use a copy of libobjs saved before convenience libraries are appended * libltdl/ltdl.h (_LTDLL_EXPORT, _LTDLL_IMPORT): use cygwin or unix library import/export primitives; this may be convenient for people willing to create DLLs (_LTDLL_EXTERN): select _LTDLL_EXPORT or _LTDLL_IMPORT depending on _LTDL_COMPILE_ * libltdl/ltdl.h, libltdl/ltdl.c (lt_dlpreopen): new function, that replaces the current preloaded_symbols list with its argument, and returns the old value, initially NULL (dldpre_init): don't refer to dld_preloaded_symbols any more (dldpre_open, dldpre_sym): search preloaded_symbols (lt_dlpreopen_default): call lt_dlpreopen with dld_preloaded_symbols, that is declared as extern; it should be called from the main program or from some static library without -no-undefined (lt_dlerror): new function, that returns the error message for the last error occurred; the error message is kept in the static variable last_error * libltdl/configure.in (enable-ltdl-install): moved back from enable-install; other packages might use enable-install already, better have fine grained control over this. * libltdl/Makefile.am (libltdls.la): discarded
80 lines
2.0 KiB
Plaintext
80 lines
2.0 KiB
Plaintext
dnl Process this file with autoconf to create configure.
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dnl Initialize the libltdl package.
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AC_INIT(ltdl.c)
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AM_INIT_AUTOMAKE(libltdl,0.1)
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AC_ARG_ENABLE(ltdl-install,
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[--enable-ltdl-install install libltdl (breaks check before install)])
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AM_CONDITIONAL(INSTALL_LTDL, test x$enable_ltdl_install = xyes)
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if test x$enable_ltdl_install = xyes; then
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LIBLIBS=libltdl.la
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NOINSTLIBS=
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else
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LIBLIBS=
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NOINSTLIBS=libltdl.la
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fi
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AC_SUBST(LIBLIBS)
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AC_SUBST(NOINSTLIBS)
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AC_PROG_CC
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AM_PROG_LIBTOOL
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AC_HEADER_STDC
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AC_CHECK_HEADERS(malloc.h memory.h stdlib.h unistd.h stdio.h ctype.h dlfcn.h dl.h)
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AC_CHECK_HEADERS(string.h strings.h, break)
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AC_CHECK_FUNCS(strdup strchr strrchr index rindex)
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AC_CACHE_CHECK([whether libtool supports -dlopen/-dlpreopen],
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libltdl_cv_dlpreopen, [dnl
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if grep '^global_symbol_pipe=..*$' ./libtool >/dev/null; then
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libltdl_cv_dlpreopen=yes
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else
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libltdl_cv_dlpreopen=no
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fi
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])
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if test x"$libltdl_cv_dlpreopen" = x"yes"; then
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AC_DEFINE(HAVE_DLPREOPEN)
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fi
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supported=yes
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LIBADD_DL=
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AC_CHECK_FUNCS(dlopen, AC_DEFINE(HAVE_LIBDL),
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[AC_CHECK_LIB(dl, dlopen, [AC_DEFINE(HAVE_LIBDL) LIBADD_DL="-ldl"],
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[AC_CHECK_LIB(dld, dld_link, [AC_DEFINE(HAVE_DLD) LIBADD_DL="-ldld"],
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[AC_CHECK_FUNCS(shl_load, AC_DEFINE(HAVE_SHL_LOAD))]
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)]
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)]
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)
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AC_SUBST(LIBADD_DL)
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AM_SYS_SYMBOL_UNDERSCORE
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if test x"$USE_SYMBOL_UNDERSCORE" = xyes; then
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if test x"$ac_cv_func_dlopen" = xyes ||
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test x"$ac_cv_lib_dl_dlopen" = xyes ; then
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AC_CACHE_CHECK([whether we have to add an underscore for dlsym],
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libltdl_cv_need_uscore, [dnl
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AC_TRY_RUN([
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#include <dlfcn.h>
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#include <stdio.h>
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fnord() { int i=42;}
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main() { void *self, *ptr1, *ptr2; self=dlopen(0,RTLD_LAZY);
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if(self) { ptr1=dlsym(self,"fnord"); ptr2=dlsym(self,"_fnord");
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if(ptr1 && !ptr2) exit(0); } exit(1); }
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], libltdl_cv_need_uscore=no, libltdl_cv_need_uscore=yes,
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libltdl_cv_need_uscore=no
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)])
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fi
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fi
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if test x"$libltdl_cv_need_uscore" = xyes; then
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AC_DEFINE(NEED_USCORE)
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fi
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dnl Output the makefile
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AC_OUTPUT(Makefile)
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# Local Variables:
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# mode:shell-script
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# sh-indentation:2
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# End:
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