configure.in (i?86-*-beos{pe,elf,}*): Recognize.

        * configure.in (i?86-*-beos{pe,elf,}*): Recognize.
        * i386/t-beos, i386/x-beos, i386/xm-beos.h: New files.
        * i386/beos-elf.h, i386/beos-pe.h: New files.

        * Makefile.in (CROSS_SYSTEM_HEADER_DIR): New.
        * cross-make (SYSTEM_HEADER_DIR): Define using
        CROSS_SYSTEM_HEADER_DIR.

        * gcc.c (LIBRARY_PATH_ENV): Provide default.
        (process_command): Use it.
        (main): Likewise.  Kill trailing = from env vars.
        (build_search_list): Put it back.
        * collect2.c (main): Use LIBRARY_PATH_ENV.

        * configure.in (GCC_NEED_DECLARATIONS): Add environ.
        * toplev.c: Use NEED_DECLARATION_ENVIRON.

        * tm.texi (Frame Layout): Document SMALL_STACK.
        * c-common.c (c_common_nodes_and_builtins): Check it.

        * system.h: Undef alloca after including glibc's <stdlib.h>,
        if USE_C_ALLOCA is defined.

        * gcc.c (set_input): New fn.
        (main): After all input files are compiled, reset the input file
        info to the first.

        * aclocal.m4 (rindex, index): If already defined, don't attempt
        to redefine.

        * ginclude/varargs.h: (__va_list__): Define ifndef.
        * ginclude/stdarg.h: Likewise.

        * ginclude/stddef.h (__WCHAR_TYPE__) [BEOS]: Use int
        instead of unsigned char.

        * hash.h (true, false, boolean): Undef before enum.

From-SVN: r31366

gcc/Makefile.in

@@ -209,6 +209,9 @@ RANLIB_TEST_FOR_TARGET = \
 # Dir to search for system headers.  Overridden by cross-make.
 SYSTEM_HEADER_DIR = /usr/include
 
+# Default cross SYSTEM_HEADER_DIR, to be overridden by targets.
+CROSS_SYSTEM_HEADER_DIR = $(tooldir)/sys-include
+
 # Control whether to run fixproto.
 STMP_FIXPROTO = stmp-fixproto
 

gcc/aclocal.m4

@@ -35,11 +35,15 @@ AC_CACHE_VAL(gcc_cv_decl_needed_$1,
 #include <unistd.h>
 #endif
 #ifndef HAVE_RINDEX
+#ifndef rindex
 #define rindex strrchr
 #endif
+#endif
 #ifndef HAVE_INDEX
+#ifndef index
 #define index strchr
 #endif
+#endif
 $2],
 [char *(*pfn) = (char *(*)) $1],
 eval "gcc_cv_decl_needed_$1=no", eval "gcc_cv_decl_needed_$1=yes")])

gcc/c-common.c

@@ -3650,10 +3650,12 @@ c_common_nodes_and_builtins (cplus_mode, no_builtins, no_nonansi_builtins)
      Declare _exit just to mark it as volatile.  */
   if (! no_builtins && ! no_nonansi_builtins)
     {
+#ifndef SMALL_STACK
       temp = builtin_function ("alloca", ptr_ftype_sizetype,
 			       BUILT_IN_ALLOCA, BUILT_IN_NORMAL, NULL_PTR);
       /* Suppress error if redefined as a non-function.  */
       DECL_BUILT_IN_NONANSI (temp) = 1;
+#endif
       temp = builtin_function ("ffs", int_ftype_int, BUILT_IN_FFS,
 			       BUILT_IN_NORMAL, NULL_PTR);
       /* Suppress error if redefined as a non-function.  */

gcc/collect2.c

@@ -42,6 +42,10 @@ Boston, MA 02111-1307, USA.  */
                lib$get_current_invo_context(decc$$get_vfork_jmpbuf()) : -1)
 #endif /* VMS */
 
+#ifndef LIBRARY_PATH_ENV
+#define LIBRARY_PATH_ENV "LIBRARY_PATH"
+#endif
+
 #define COLLECT
 
 #include "collect2.h"
@@ -1353,9 +1357,9 @@ main (argc, argv)
       if (ptr)
 	fprintf (stderr, "COMPILER_PATH       = %s\n", ptr);
 
-      ptr = getenv ("LIBRARY_PATH");
+      ptr = getenv (LIBRARY_PATH_ENV);
       if (ptr)
-	fprintf (stderr, "LIBRARY_PATH        = %s\n", ptr);
+	fprintf (stderr, "%-20s= %s\n", LIBRARY_PATH_ENV, ptr);
 
       fprintf (stderr, "\n");
     }

gcc/config/i386/beos-pe.h

+/* Operating system specific defines for BeOS target.
+   Copyright (C) 1995-99, 2000 Free Software Foundation, Inc.
+   Contributed by Fred Fish (fnf@cygnus.com), based on cygwin32.h.
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+
+/* Get all the PE support related things.  */
+#include "cygwin32.h"
+
+/* Change debugging to Dwarf2.  */
+#undef SDB_DEBUGGING_INFO
+#undef DBX_DEBUGGING_INFO
+#define DWARF2_DEBUGGING_INFO
+#undef PREFERRED_DEBUGGING_TYPE
+#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
+
+/* Support the __declspec keyword by turning them into attributes.
+   We currently only support: dllimport and dllexport.
+   Note that the current way we do this may result in a collision with
+   predefined attributes later on.  This can be solved by using one attribute,
+   say __declspec__, and passing args to it.  The problem with that approach
+   is that args are not accumulated: each new appearance would clobber any
+   existing args.  */
+
+#undef CPP_PREDEFINES
+#define CPP_PREDEFINES "-D__BEOS__ -D__INTEL__ -Di386 -D_X86_=1 \
+-D__stdcall=__attribute__((__stdcall__)) \
+-D__cdecl=__attribute__((__cdecl__)) \
+-D__declspec(x)=__attribute__((x)) \
+-Asystem(beos) -Acpu(i386) -Amachine(i386)"
+
+#undef CPP_SPEC
+#define CPP_SPEC "-remap %(cpp_cpu) %{posix:-D_POSIX_SOURCE}"
+
+#undef LIB_SPEC
+#define LIB_SPEC "-lroot -lbe -ltracker -lmedia -lnet -lnetdev -ldevice -lmidi -lgame -latalk -lmail"
+
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC "/boot/develop/lib/x86/start_dyn.o /boot/develop/lib/x86/init_term_dyn.o /boot/develop/lib/x86/glue-noinit.a"
+
+/* Temporary. */
+#define LINKERSCRIPT_SPEC "%{!T:-Tbeos.ld}"
+
+/* No math library. */
+#define MATH_LIBRARY ""
+
+/* Don't ignore dllimport for functions.  */
+#undef TARGET_NOP_FUN_DLLIMPORT
+#define TARGET_NOP_FUN_DLLIMPORT 0
+
+#undef SUBTARGET_SWITCHES
+#define SUBTARGET_SWITCHES
+
+/* Disable DWARF2 unwind info; this doesn't appear to work on
+   COFF-based targets right now. (I want to say "duh?" but someone
+   will correct me later. */
+
+#undef INCOMING_RETURN_ADDR_RTX
+#undef DWARF2_UNWIND_INFO
+
+/* In the current BeOS release (DR9), use of gcc's builtin alloca is a
+   problem because of the relatively low default stack size of 256K with no
+   way to expand it.  So anything we compile for the BeOS target should not
+   use the builtin alloca.  Defining SMALL_STACK disables builtin alloca.  */
+
+#define SMALL_STACK
+
+/* Yuck. */
+#ifndef CROSS_COMPILE
+#undef INCLUDE_DEFAULTS
+#define INCLUDE_DEFAULTS \
+    { \
+    { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1 },\
+    { GCC_INCLUDE_DIR, "GCC", 0, 0 },\
+    { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1}, \
+    { "/boot/develop/headers/be/add-ons/graphics", 0, 0, 0 },\
+    { "/boot/develop/headers/be/translation", 0, 0, 0 },\
+    { "/boot/develop/headers/be/mail", 0, 0, 0 },\
+    { "/boot/develop/headers/gnu", 0, 0, 0 },\
+    { "/boot/develop/headers/be/drivers", 0, 0, 0 },\
+    { "/boot/develop/headers/be/game", 0, 0, 0 },\
+    { "/boot/develop/headers/be/support", 0, 0, 0 },\
+    { "/boot/develop/headers/be/storage", 0, 0, 0 },\
+    { "/boot/develop/headers/be/kernel", 0, 0, 0 },\
+    { "/boot/develop/headers/be/net", 0, 0, 0 },\
+    { "/boot/develop/headers/be/midi", 0, 0, 0 },\
+    { "/boot/develop/headers/be/media", 0, 0, 0 },\
+    { "/boot/develop/headers/be/interface", 0, 0, 0 },\
+    { "/boot/develop/headers/be/device", 0, 0, 0 },\
+    { "/boot/develop/headers/be/app", 0, 0, 0 },\
+    { "/boot/develop/headers/cpp", 0, 0, 0 },\
+    { "/boot/develop/headers/posix", 0, 0, 0 },\
+    { "/boot/develop/headers/be/precompiled", 0, 0, 0 },\
+    { "/boot/develop/headers/be", 0, 0, 0 },\
+    { "/boot/develop/headers", 0, 0, 0 }, \
+    { 0, 0, 0, 0 } \
+    };
+#endif
+
+/* Whee.  LIBRARY_PATH is Be's LD_LIBRARY_PATH, which of course will
+   cause nasty problems if we override it.  */
+#define LIBRARY_PATH_ENV	"BELIBRARIES"

gcc/config/i386/t-beos

+# Do not build libgcc1.
+LIBGCC1 =
+CROSS_LIBGCC1 =
+
+# There are system headers elsewhere, but these are the ones that
+# we are most likely to want to apply any fixes to.
+SYSTEM_HEADER_DIR = /boot/develop/headers/posix
+CROSS_SYSTEM_HEADER_DIR = $(tooldir)/sys-include/posix
+
+# Use the system assert.h
+INSTALL_ASSERT_H =
+
+winnt.o: $(srcdir)/config/i386/winnt.c
+	$(CC) -c $(ALL_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) $(srcdir)/config/i386/winnt.c

gcc/config/i386/x-beos

+# configuration for BeOS
+INSTALL=install -c
+
+# Show we need to use the C version of ALLOCA
+ALLOCA=alloca.o
+# Use it regardless of whether we are compiling with gcc or not.
+USE_ALLOCA= `echo "${ALLOCA}"`
+USE_HOST_ALLOCA= `echo ${HOST_PREFIX}${HOST_ALLOCA}`
+SUBDIR_USE_ALLOCA = `if [ x$(ALLOCA) != x ]; then echo ../$(ALLOCA); else true; fi`

gcc/config/i386/xm-beos.h

+/* Configuration for GNU C-compiler for BeOS host.
+   Copyright (C) 1997-99, 2000 Free Software Foundation, Inc.
+   Contributed by Fred Fish (fnf@cygnus.com), based on xm-rs6000.h
+   by Richard Kenner (kenner@vlsi1.ultra.nyu.edu).
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include <i386/xm-i386.h>
+
+/* Arguments to use with `exit'.  */
+
+#define	SUCCESS_EXIT_CODE	0
+#define	FATAL_EXIT_CODE		33
+
+/* Include <sys/wait.h> to define the exit status access macros.  */
+#ifndef inhibit_libc
+#include <sys/wait.h>
+#endif
+
+#define	ONLY_INT_FIELDS
+
+/* use ANSI/SYSV style byte manipulation routines instead of BSD ones */
+
+#undef bcopy
+#define bcopy(s,d,n)	memmove((d),(s),(n))
+#undef bzero
+#define bzero(d,n)	memset((d),0,(n))
+#undef bcmp
+#define bcmp(l,r,n)	memcmp((l),(r),(n))
+#undef index
+#define index		strchr
+#undef rindex
+#define rindex		strrchr
+
+/* BeOS is closer to USG than BSD */
+
+#define USG
+
+/* Define various things that the BeOS host has. */
+
+#ifndef HAVE_VPRINTF
+#define HAVE_VPRINTF
+#endif
+#ifndef HAVE_PUTENV
+#define HAVE_PUTENV
+#endif
+#define HAVE_RENAME
+
+#define STDC_HEADERS 1

gcc/configure.in

@@ -409,7 +409,7 @@ AC_FUNC_MMAP
 
 GCC_NEED_DECLARATIONS(bcopy bzero bcmp \
 	index rindex getenv atol sbrk abort atof strerror getcwd getwd \
-	strsignal putc_unlocked fputs_unlocked strstr)
+	strsignal putc_unlocked fputs_unlocked strstr environ)
 
 GCC_NEED_DECLARATIONS(malloc realloc calloc free, [
 #ifdef HAVE_MALLOC_H
@@ -1277,6 +1277,27 @@ changequote([,])dnl
 		tmake_file=i386/t-i386bare
 		;;
 changequote(,)dnl
+	i[34567]86-*-beospe*)
+changequote([,])dnl
+		xm_file=i386/xm-beos.h
+		xm_defines="USE_C_ALLOCA"
+		tmake_file=i386/t-beos
+		tm_file=i386/beos-pe.h
+		xmake_file=i386/x-beos
+		extra_objs=winnt.o
+		;;
+changequote(,)dnl
+	i[34567]86-*-beoself* | i[34567]86-*-beos*)
+changequote([,])dnl
+		xm_file=i386/xm-beos.h
+		tmake_file='i386/t-beos i386/t-crtpic'
+		tm_file=i386/beos-elf.h
+		xmake_file=i386/x-beos
+		extra_objs=winnt.o
+		extra_parts='crtbegin.o crtend.o'
+		fixincludes=Makefile.in
+		;;
+changequote(,)dnl
 	i[34567]86-*-bsdi* | i[34567]86-*-bsd386*)
 changequote([,])dnl
 		tm_file=i386/bsd386.h

gcc/cross-make

@@ -5,7 +5,7 @@ LIBGCC1 = $(CROSS_LIBGCC1)
 
 # Dir to search for system headers.  Normally /usr/include.
 # Use CROSS_INCLUDE_DIR not TOOL_INCLUDE_DIR for other vendor's headers.
-SYSTEM_HEADER_DIR = $(tooldir)/sys-include
+SYSTEM_HEADER_DIR = $(CROSS_SYSTEM_HEADER_DIR)
 
 # Don't try to compile the things we can't compile.
 ALL = all.cross

gcc/gcc.c

@@ -82,6 +82,11 @@ static char dir_separator_str[] = {DIR_SEPARATOR, 0};
 #define GET_ENV_PATH_LIST(VAR,NAME)	do { (VAR) = getenv (NAME); } while (0)
 #endif
 
+/* Most every one is fine with LIBRARY_PATH.  For some, it conflicts.  */
+#ifndef LIBRARY_PATH_ENV
+#define LIBRARY_PATH_ENV "LIBRARY_PATH"
+#endif
+
 #ifndef HAVE_KILL
 #define kill(p,s) raise(s)
 #endif
@@ -240,6 +245,7 @@ static int execute			PROTO ((void));
 static void unused_prefix_warnings	PROTO ((struct path_prefix *));
 static void clear_args			PROTO ((void));
 static void fatal_error			PROTO ((int));
+static void set_input			PROTO ((const char *));
 
 /* Specs are strings containing lines, each of which (if not blank)
 is made up of a program name, and arguments separated by spaces.
@@ -1892,6 +1898,7 @@ build_search_list (paths, prefix, check_dir_p)
   struct prefix_list *pprefix;
 
   obstack_grow (&collect_obstack, prefix, strlen (prefix));
+  obstack_1grow (&collect_obstack, '=');
 
   for (pprefix = paths->plist; pprefix != 0; pprefix = pprefix->next)
     {
@@ -2941,7 +2948,7 @@ process_command (argc, argv)
 	}
     }
 
-  GET_ENV_PATH_LIST (temp, "LIBRARY_PATH");
+  GET_ENV_PATH_LIST (temp, LIBRARY_PATH_ENV);
   if (temp && *cross_compile == '0')
     {
       const char *startp, *endp;
@@ -4935,6 +4942,37 @@ is_directory (path1, path2, linker)
 
   return (stat (path, &st) >= 0 && S_ISDIR (st.st_mode));
 }
+
+/* Set up the various global variables to indicate that we're processing
+   the input file named FILENAME.  */
+
+static void
+set_input (filename)
+     const char *filename;
+{
+  register const char *p;
+
+  input_filename = filename;
+  input_filename_length = strlen (input_filename);
+  
+  input_basename = input_filename;
+  for (p = input_filename; *p; p++)
+    if (IS_DIR_SEPARATOR (*p))
+      input_basename = p + 1;
+
+  /* Find a suffix starting with the last period,
+     and set basename_length to exclude that suffix.  */
+  basename_length = strlen (input_basename);
+  p = input_basename + basename_length;
+  while (p != input_basename && *p != '.') --p;
+  if (*p == '.' && p != input_basename)
+    {
+      basename_length = p - input_basename;
+      input_suffix = p + 1;
+    }
+  else
+    input_suffix = "";
+}
 
 /* On fatal signals, delete all the temporary files.  */
 
@@ -5335,9 +5373,8 @@ main (argc, argv)
 
       /* Tell do_spec what to substitute for %i.  */
 
-      input_filename = infiles[i].name;
-      input_filename_length = strlen (input_filename);
       input_file_number = i;
+      set_input (infiles[i].name);
 
       /* Use the same thing in %o, unless cp->spec says otherwise.  */
 
@@ -5352,31 +5389,12 @@ main (argc, argv)
 	{
 	  /* Ok, we found an applicable compiler.  Run its spec.  */
 	  /* First say how much of input_filename to substitute for %b  */
-	  register const char *p;
 	  int len;
 
 	  if (cp->spec[0][0] == '#')
 	    error ("%s: %s compiler not installed on this system",
 		   input_filename, &cp->spec[0][1]);
 
-	  input_basename = input_filename;
-	  for (p = input_filename; *p; p++)
-	    if (IS_DIR_SEPARATOR (*p))
-	      input_basename = p + 1;
-
-	  /* Find a suffix starting with the last period,
-	     and set basename_length to exclude that suffix.  */
-	  basename_length = strlen (input_basename);
-	  p = input_basename + basename_length;
-	  while (p != input_basename && *p != '.') --p;
-	  if (*p == '.' && p != input_basename)
-	    {
-	      basename_length = p - input_basename;
-	      input_suffix = p + 1;
-	    }
-	  else
-	    input_suffix = "";
-
 	  len = 0;
 	  for (j = 0; j < sizeof cp->spec / sizeof cp->spec[0]; j++)
 	    if (cp->spec[j])
@@ -5418,6 +5436,12 @@ main (argc, argv)
       clear_failure_queue ();
     }
 
+  /* Reset the output file name to the first input file name, for use
+     with %b in LINK_SPEC on a target that prefers not to emit a.out
+     by default.  */
+  if (n_infiles > 0)
+    set_input (infiles[0].name);
+
   if (error_count == 0)
     {
       /* Make sure INPUT_FILE_NUMBER points to first available open
@@ -5442,8 +5466,8 @@ main (argc, argv)
 	}
       /* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables
 	 for collect.  */
-      putenv_from_prefixes (&exec_prefixes, "COMPILER_PATH=");
-      putenv_from_prefixes (&startfile_prefixes, "LIBRARY_PATH=");
+      putenv_from_prefixes (&exec_prefixes, "COMPILER_PATH");
+      putenv_from_prefixes (&startfile_prefixes, LIBRARY_PATH_ENV);
 
       value = do_spec (link_command_spec);
       if (value < 0)

gcc/ginclude/stdarg.h

@@ -105,7 +105,10 @@ typedef __gnuc_va_list va_list;
 #ifndef _VA_LIST
 /* The macro _VA_LIST_T_H is used in the Bull dpx2  */
 #ifndef _VA_LIST_T_H
+/* The macro __va_list__ is used by BeOS.  */
+#ifndef __va_list__
 typedef __gnuc_va_list va_list;
+#endif /* not __va_list__ */
 #endif /* not _VA_LIST_T_H */
 #endif /* not _VA_LIST */
 #endif /* not _VA_LIST_DEFINED */
@@ -121,6 +124,9 @@ typedef __gnuc_va_list va_list;
 #ifndef _VA_LIST_T_H
 #define _VA_LIST_T_H
 #endif
+#ifndef __va_list__
+#define __va_list__
+#endif
 
 #endif /* not _VA_LIST_, except on certain systems */
 

gcc/ginclude/stddef.h

@@ -274,12 +274,8 @@ typedef _BSD_RUNE_T_ rune_t;
 #endif
 
 #ifndef __WCHAR_TYPE__
-#ifdef __BEOS__
-#define __WCHAR_TYPE__ unsigned char
-#else
 #define __WCHAR_TYPE__ int
 #endif
-#endif
 #ifndef __cplusplus
 typedef __WCHAR_TYPE__ wchar_t;
 #endif

gcc/ginclude/varargs.h

@@ -108,7 +108,10 @@ typedef __gnuc_va_list va_list;
 #ifndef _VA_LIST
 /* The macro _VA_LIST_T_H is used in the Bull dpx2  */
 #ifndef _VA_LIST_T_H
+/* The macro __va_list__ is used by BeOS.  */
+#ifndef __va_list__
 typedef __gnuc_va_list va_list;
+#endif /* not __va_list__ */
 #endif /* not _VA_LIST_T_H */
 #endif /* not _VA_LIST */
 #endif /* not _VA_LIST_DEFINED */
@@ -124,6 +127,9 @@ typedef __gnuc_va_list va_list;
 #ifndef _VA_LIST_T_H
 #define _VA_LIST_T_H
 #endif
+#ifndef __va_list__
+#define __va_list__
+#endif
 
 #endif /* not _VA_LIST_, except on certain systems */
 

gcc/hash.h

@@ -25,6 +25,10 @@ Boston, MA 02111-1307, USA.  */
 
 #include "obstack.h"
 
+#undef false
+#undef true
+#undef boolean
+
 typedef enum {false, true} boolean;
 
 typedef PTR hash_table_key;

gcc/system.h

@@ -176,6 +176,11 @@ extern int errno;
 
 #ifdef HAVE_STDLIB_H
 # include <stdlib.h>
+# ifdef USE_C_ALLOCA
+/* Note that systems that use glibc have a <stdlib.h> that includes
+   <alloca.h> that defines alloca, so let USE_C_ALLOCA override this. */
+# undef alloca
+#endif
 #endif
 
 #ifdef HAVE_UNISTD_H

gcc/tm.texi

@@ -461,7 +461,7 @@ The environment variable @code{GCC_EXEC_PREFIX}, if any.
 
 @item
 The directories specified by the environment variable @code{LIBRARY_PATH}
-(native only, cross compilers do not use this).
+(or port-specific name; native only, cross compilers do not use this).
 
 @item
 The macro @code{STANDARD_EXEC_PREFIX}.
@@ -2281,6 +2281,12 @@ during virtual register instantiation.
 
 You only need to define this macro if you want to support call frame
 debugging information like that provided by DWARF 2.
+
+@findex SMALL_STACK
+@item SMALL_STACK
+Define this macro if the stack size for the target is very small.  This
+has the effect of disabling gcc's builtin @samp{alloca}, though
+@samp{__builtin_alloca} is not affected.
 @end table
 
 @node Stack Checking
@@ -7784,4 +7790,12 @@ in the system math library, or @samp{""} if the target does not have a
 separate math library.
 
 You need only define this macro if the default of @samp{"-lm"} is wrong.
+
+@findex LIBRARY_PATH_ENV
+@item LIBRARY_PATH_ENV
+Define this macro as a C string constant for the environment variable that
+specifies where the linker should look for libraries.
+
+You need only define this macro if the default of @samp{"LIBRARY_PATH"}
+is wrong.
 @end table

gcc/toplev.c

@@ -138,7 +138,7 @@ You Lose!  You must define PREFERRED_DEBUGGING_TYPE!
 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
 #endif
 
-#if ! (defined (VMS) || defined (OS2))
+#ifdef NEED_DECLARATION_ENVIRON
 extern char **environ;
 #endif
 extern char *version_string;