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Updates, bug fixes for using the dynamic linker to look up paths of

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object files from which classes have been loaded


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@14872 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
nico 2002-10-30 02:27:45 +00:00
parent 40d05e748f
commit ea1ac7c7c1
5 changed files with 151 additions and 85 deletions
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73
config/objc-sys-dynamic.m4
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@ -20,66 +20,25 @@ if test $DYNAMIC_LINKER = null; then
AC_CHECK_HEADER(dld/defs.h, DYNAMIC_LINKER=dld)
fi
# NB: This is used as follows: in Source/Makefile.postamble we copy
# $(DYNAMIC_LINKER)-load.h into dynamic-load.h
AC_MSG_CHECKING([for dynamic linker type])
AC_MSG_RESULT([$DYNAMIC_LINKER])
if test $DYNAMIC_LINKER = simple; then
AC_MSG_CHECKING([checking if dladdr() is available])
old_LDFLAGS="$LDFLAGS"
case "$target_os" in
linux-gnu*) LDFLAGS="$old_LDFLAGS -ldl";;
solaris*) LDFLAGS="$old_LDFLAGS -ldl";;
sysv4.2*) LDFLAGS="$old_LDFLAGS -ldl";;
esac
AC_TRY_LINK([#include <dlfcn.h>], dladdr(0,0);,
AC_DEFINE(HAVE_DLADDR,1, [Define if you have dladdr]))
AC_DEFINE(HAVE_DLADDR,1, [Define if you have dladdr])
AC_MSG_RESULT([yes]),
AC_MSG_RESULT([no]))
LDFLAGS="$old_LDFLAGS"
fi
AC_SUBST(DYNAMIC_LINKER)dnl
])
AC_DEFUN(OBJC_SYS_DYNAMIC_FLAGS,
[dnl
AC_REQUIRE([OBJC_CON_AUTOLOAD])dnl
AC_REQUIRE([OBJC_SYS_DYNAMIC_LINKER])dnl
#--------------------------------------------------------------------
# Set the flags for compiling dynamically loadable objects
#
# Makes the following substitutions:
# DYNAMIC_BUNDLER_LINKER - The command to link the object files into
# a dynamically loadable module.
# DYNAMIC_LDFLAGS - Flags required when compiling the main program
# that will do the dynamic linking
# DYNAMIC_CFLAGS - Flags required when compiling the object files that
# will be included in the loaded module.
#--------------------------------------------------------------------
if test $DYNAMIC_LINKER = dld; then
DYNAMIC_BUNDLER_LINKER="ld -r"
DYNAMIC_LDFLAGS="-static"
DYNAMIC_CFLAGS=""
elif test $DYNAMIC_LINKER = simple; then
save_LDFLAGS=$LDFLAGS
LDFLAGS="-shared"
AC_TRY_LINK([extern void loadf();], loadf();,
objc_shared_linker=yes, objc_shared_linker=no)
LDFLAGS=$save_LDFLAGS
if test $objc_shared_linker = yes; then
DYNAMIC_BUNDLER_LINKER='$(CC) -shared'
elif test $objc_cv_con_autoload = yes; then
DYNAMIC_BUNDLER_LINKER='$(CC) -Xlinker -r'
else
DYNAMIC_BUNDLER_LINKER='$(CC) -nostdlib'
fi
save_LDFLAGS=$LDFLAGS
LDFLAGS="-rdynamic"
AC_TRY_RUN([], objc_dynamic_ldflag="-rdynamic", objc_dynamic_ldflag="",
objc_dynamic_ldflag="")
LDFLAGS=$save_LDFLAGS
DYNAMIC_LDFLAGS="$objc_dynamic_ldflag"
DYNAMIC_CFLAGS="-fPIC"
elif test $DYNAMIC_LINKER = hpux; then
DYNAMIC_BUNDLER_LINKER='$(CC) -nostdlib -Xlinker -b'
DYNAMIC_LDFLAGS="-Xlinker -E"
DYNAMIC_CFLAGS="-fPIC"
elif test $DYNAMIC_LINKER = null; then
DYNAMIC_BUNDLER_LINKER='$(CC) -nostdlib -Xlinker -r'
DYNAMIC_LDFLAGS=""
DYNAMIC_CFLAGS=""
else
DYNAMIC_BUNDLER_LINKER='$(CC) -nostdlib -Xlinker -r'
DYNAMIC_LDFLAGS=""
DYNAMIC_CFLAGS=""
fi
AC_SUBST(DYNAMIC_BUNDLER_LINKER)dnl
AC_SUBST(DYNAMIC_LDFLAGS)dnl
AC_SUBST(DYNAMIC_CFLAGS)dnl
])