Initial revision

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@609 72102866-910b-0410-8b05-ffd578937521

aclocal.m4

@@ -0,0 +1,118 @@
+# aclocal.m4 - configure macros for libobjects and projects that depend on it.
+#
+#   Copyright (C) 1995 Free Software Foundation, Inc.
+#
+#   Written by:  Adam Fedor <fedor@boulder.colorado.edu>
+#
+#   This file is part of the GNU Objective-C library.
+#
+#   This library is free software; you can redistribute it and/or
+#   modify it under the terms of the GNU Library General Public
+#   License as published by the Free Software Foundation; either
+#   version 2 of the License, or (at your option) any later version.
+#   
+#   This library is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+#   Library General Public License for more details.
+#
+#   You should have received a copy of the GNU Library General Public
+#   License along with this library; if not, write to the Free
+#   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
+AC_DEFUN(OBJC_SYS_AUTOLOAD,
+[dnl
+#--------------------------------------------------------------------
+# Guess if we are using a object file format that supports automatic
+# loading of constructor functions, et. al. (e.g. ELF format).
+#
+# Currently only looks for ELF format. NOTE: Checking for __ELF__ being
+# defined doesnt work, since gcc on Solaris does not define this
+#
+# Makes the following substitutions:
+#	Defines SYS_AUTOLOAD
+#--------------------------------------------------------------------
+AC_CACHE_VAL(objc_cv_sys_autoload,
+[AC_CHECK_HEADER(elf.h, [objc_cv_sys_autoload=yes], [objc_cv_sys_autoload=no])
+])
+if test $objc_cv_sys_autoload = yes; then
+  AC_DEFINE(SYS_AUTOLOAD)
+fi
+])
+
+AC_DEFUN(OBJC_SYS_DYNAMIC_LINKER,
+[dnl
+#--------------------------------------------------------------------
+# Guess the type of dynamic linker for the system
+#
+# Makes the following substitutions:
+#	DYNAMIC_LINKER	- cooresponds to the interface that is included
+#		in objc-load.c (i.e. #include "${DYNAMIC_LINKER}-load.h")
+#	LIBS		- Updated to include the system library that 
+#		performs dynamic linking. 
+#--------------------------------------------------------------------
+DYNAMIC_LINKER=null
+AC_CHECK_LIB(dl, dlopen, [DYNAMIC_LINKER=simple LIBS="${LIBS} -ldl"])
+
+if test $DYNAMIC_LINKER = null; then
+    AC_CHECK_LIB(dld, main, [DYNAMIC_LINKER=dld LIBS="${LIBS} -ldld"])
+    AC_CHECK_HEADER(dld/defs.h, [objc_found_dld_defs=yes, objc_found_dld_defs=no])
+    # Try to distinguish between GNU dld and HPUX dld 
+    AC_CHECK_HEADER(dl.h, [DYNAMIC_LINKER=hpux])
+    if test $ac_cv_lib_dld = yes && test $objc_found_dld_defs = no && test $ac_cv_header_dl_h = no; then
+        AC_MSG_WARN(Could not find dld/defs.h header)
+        echo
+        echo "Currently, the dld/defs.h header is needed to get information"
+        echo "about how to use GNU dld. Some files may not compile without"
+        echo "this header."
+        echo
+    fi
+fi
+AC_SUBST(DYNAMIC_LINKER)dnl
+AC_SUBST(DLD_INCLUDE)dnl
+])
+
+AC_DEFUN(OBJC_SYS_DYNAMIC_FLAGS,
+[AC_REQUIRE([OBJC_SYS_DYNAMIC_LINKER])dnl
+AC_REQUIRE([OBJC_SYS_AUTOLOAD])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
+    if test $objc_cv_sys_autoload = yes; then 
+      DYNAMIC_BUNDLER_LINKER="$(CC) -Xlinker -r"
+    else
+      DYNAMIC_BUNDLER_LINKER="$(CC) -nostdlib"
+    fi
+    DYNAMIC_LDFLAGS=""
+    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
+])