re PR driver/42485 (-V switch broken)

2010-04-08  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR 42485
	* doc/invoke.texi (-b,-V): Delete.
	* doc/tm.texi: Do not mention -b.
	* gcc.c (display_help): Delete -b and -V.
	(process_command): Delete -b and -V.
	* gcc.h (DEFAULT_SWITCH_TAKES_ARG): Delete -b and -V.

From-SVN: r158134

gcc/ChangeLog

+2010-04-08  Manuel López-Ibáñez  <manu@gcc.gnu.org>
+
+	PR 42485
+	* doc/invoke.texi (-b,-V): Delete.
+	* doc/tm.texi: Do not mention -b.
+	* gcc.c (display_help): Delete -b and -V.
+	(process_command): Delete -b and -V.
+	* gcc.h (DEFAULT_SWITCH_TAKES_ARG): Delete -b and -V.
+	
 2010-04-08  Christian Borntraeger  <borntraeger@de.ibm.com>
             Wolfgang Gellerich  <gellerich@de.ibm.com>
 

gcc/doc/invoke.texi

@@ -428,11 +428,6 @@ Objective-C and Objective-C++ Dialects}.
 @gccoptlist{-B@var{prefix}  -I@var{dir}  -iquote@var{dir}  -L@var{dir}
 -specs=@var{file}  -I- --sysroot=@var{dir}}
 
-@item Target Options
-@c I wrote this xref this way to avoid overfull hbox. -- rms
-@xref{Target Options}.
-@gccoptlist{-V @var{version}  -b @var{machine}}
-
 @item Machine Dependent Options
 @xref{Submodel Options,,Hardware Models and Configurations}.
 @c This list is ordered alphanumerically by subsection name.
@@ -9556,33 +9551,7 @@ proper position among the other output files.
 The usual way to run GCC is to run the executable called @file{gcc}, or
 @file{<machine>-gcc} when cross-compiling, or
 @file{<machine>-gcc-<version>} to run a version other than the one that
-was installed last.  Sometimes this is inconvenient, so GCC provides
-options that will switch to another cross-compiler or version.
-
-@table @gcctabopt
-@item -b @var{machine}
-@opindex b
-The argument @var{machine} specifies the target machine for compilation.
-
-The value to use for @var{machine} is the same as was specified as the
-machine type when configuring GCC as a cross-compiler.  For
-example, if a cross-compiler was configured with @samp{configure
-arm-elf}, meaning to compile for an arm processor with elf binaries,
-then you would specify @option{-b arm-elf} to run that cross compiler.
-Because there are other options beginning with @option{-b}, the
-configuration must contain a hyphen, or @option{-b} alone should be one
-argument followed by the configuration in the next argument.
-
-@item -V @var{version}
-@opindex V
-The argument @var{version} specifies which version of GCC to run.
-This is useful when multiple versions are installed.  For example,
-@var{version} might be @samp{4.0}, meaning to run GCC version 4.0.
-@end table
-
-The @option{-V} and @option{-b} options work by running the
-@file{<machine>-gcc-<version>} executable, so there's no real reason to
-use them if you can just run that directly.
+was installed last.
 
 @node Submodel Options
 @section Hardware Models and Configurations
@@ -9591,11 +9560,7 @@ use them if you can just run that directly.
 @cindex hardware models and configurations, specifying
 @cindex machine dependent options
 
-Earlier we discussed the standard option @option{-b} which chooses among
-different installed compilers for completely different target
-machines, such as VAX vs.@: 68000 vs.@: 80386.
-
-In addition, each of these target machine types can have its own
+Each target machine types can have its own
 special options, starting with @samp{-m}, to choose among various
 hardware models or configurations---for example, 68010 vs 68020,
 floating coprocessor or none.  A single installed version of the

gcc/doc/tm.texi

@@ -465,7 +465,7 @@ indicates an absolute file name.
 @defmac MD_EXEC_PREFIX
 If defined, this macro is an additional prefix to try after
 @code{STANDARD_EXEC_PREFIX}.  @code{MD_EXEC_PREFIX} is not searched
-when the @option{-b} option is used, or the compiler is built as a cross
+when the compiler is built as a cross
 compiler.  If you define @code{MD_EXEC_PREFIX}, then be sure to add it
 to the list of directories used to find the assembler in @file{configure.in}.
 @end defmac
@@ -497,14 +497,13 @@ is built as a cross compiler.
 @defmac MD_STARTFILE_PREFIX
 If defined, this macro supplies an additional prefix to try after the
 standard prefixes.  @code{MD_EXEC_PREFIX} is not searched when the
-@option{-b} option is used, or when the compiler is built as a cross
-compiler.
+compiler is built as a cross compiler.
 @end defmac
 
 @defmac MD_STARTFILE_PREFIX_1
 If defined, this macro supplies yet another prefix to try after the
-standard prefixes.  It is not searched when the @option{-b} option is
-used, or when the compiler is built as a cross compiler.
+standard prefixes.  It is not searched when the compiler is built as a
+cross compiler.
 @end defmac
 
 @defmac INIT_ENVIRONMENT

gcc/gcc.c

@@ -262,11 +262,11 @@ static int use_pipes;
 
 static const char *compiler_version;
 
-/* The target version specified with -V */
+/* The target version.  */
 
 static const char *const spec_version = DEFAULT_TARGET_VERSION;
 
-/* The target machine specified with -b.  */
+/* The target machine.  */
 
 static const char *spec_machine = DEFAULT_TARGET_MACHINE;
 
@@ -3420,8 +3420,6 @@ display_help (void)
   --sysroot=<directory>    Use <directory> as the root directory for headers\n\
                            and libraries\n"), stdout);
   fputs (_("  -B <directory>           Add <directory> to the compiler's search paths\n"), stdout);
-  fputs (_("  -b <machine>             Run gcc for target <machine>, if installed\n"), stdout);
-  fputs (_("  -V <version>             Run gcc version number <version>, if installed\n"), stdout);
   fputs (_("  -v                       Display the programs invoked by the compiler\n"), stdout);
   fputs (_("  -###                     Like -v but options quoted and commands not executed\n"), stdout);
   fputs (_("  -E                       Preprocess only; do not compile, assemble or link\n"), stdout);
@@ -3526,81 +3524,6 @@ process_command (int argc, const char **argv)
 	}
     }
 
-  /* If there is a -V or -b option (or both), process it now, before
-     trying to interpret the rest of the command line.
-     Use heuristic that all configuration names must have at least
-     one dash '-'. This allows us to pass options starting with -b.  */
-  if (argc > 1 && argv[1][0] == '-'
-      && (argv[1][1] == 'V'
-	  || (argv[1][1] == 'b'
-	      && (argv[1][2] == '\0'
-		  || NULL != strchr (argv[1] + 2, '-')))))
-    {
-      const char *new_version = DEFAULT_TARGET_VERSION;
-      const char *new_machine = DEFAULT_TARGET_MACHINE;
-      const char *progname = argv[0];
-      char **new_argv;
-      char *new_argv0;
-      int baselen;
-      int status = 0;
-      int err = 0;
-      const char *errmsg;
-
-      while (argc > 1 && argv[1][0] == '-'
-	     && (argv[1][1] == 'V'
-		 || (argv[1][1] == 'b'
-		     && (argv[1][2] == '\0'
-			 || NULL != strchr (argv[1] + 2, '-')))))
-	{
-	  char opt = argv[1][1];
-	  const char *arg;
-	  if (argv[1][2] != '\0')
-	    {
-	      arg = argv[1] + 2;
-	      argc -= 1;
-	      argv += 1;
-	    }
-	  else if (argc > 2)
-	    {
-	      arg = argv[2];
-	      argc -= 2;
-	      argv += 2;
-	    }
-	  else
-	    fatal ("'-%c' option must have argument", opt);
-	  if (opt == 'V')
-	    new_version = arg;
-	  else
-	    new_machine = arg;
-	}
-
-      for (baselen = strlen (progname); baselen > 0; baselen--)
-	if (IS_DIR_SEPARATOR (progname[baselen-1]))
-	  break;
-      new_argv0 = XDUPVAR (char, progname, baselen,
-			   baselen + concat_length (new_version, new_machine,
-						    "-gcc-", NULL) + 1);
-      strcpy (new_argv0 + baselen, new_machine);
-      strcat (new_argv0, "-gcc-");
-      strcat (new_argv0, new_version);
-
-      new_argv = XDUPVEC (char *, argv, argc + 1);
-      new_argv[0] = new_argv0;
-
-      errmsg = pex_one (PEX_SEARCH, new_argv0, new_argv, progname, NULL,
-			NULL, &status, &err);
-
-      if (errmsg)
-	{
-	  if (err == 0)
-	    fatal ("couldn't run '%s': %s", new_argv0, errmsg);
-	  else
-	    fatal ("couldn't run '%s': %s: %s", new_argv0, errmsg,
-		    xstrerror (err));
-        }
-      exit (status);
-    }
-
   /* Convert new-style -- options to old-style.  */
   translate_options (&argc,
 		     CONST_CAST2 (const char *const **, const char ***,
@@ -4094,15 +4017,6 @@ process_command (int argc, const char **argv)
 
 	  switch (c)
 	    {
-	    case 'b':
-	      if (p[1] && NULL == strchr (argv[i] + 2, '-'))
-		goto normal_switch;
-
-	      /* Fall through.  */
-	    case 'V':
-	      fatal ("'-%c' must come at the start of the command line", c);
-	      break;
-
 	    case 'B':
 	      {
 		const char *value;

gcc/gcc.h

@@ -38,7 +38,7 @@ struct spec_function
    || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u' \
    || (CHAR) == 'I' || (CHAR) == 'J' || (CHAR) == 'm' \
    || (CHAR) == 'x' || (CHAR) == 'L' || (CHAR) == 'A' \
-   || (CHAR) == 'V' || (CHAR) == 'B' || (CHAR) == 'b')
+   || (CHAR) == 'B' )
 
 /* This defines which multi-letter switches take arguments.  */