PATCH: nicer ./configure --help

[Ralf Wildenhues <Ralf dot Wildenhues at gmx dot de>]

Hello,

Please consider this patch that make './configure --help' look nicer
by actually aligning most help strings, removing TABs in them, unifying
use of lower and upper case, removing superfluous punctuation and words,
and adding some quadrigraphs[1] to output [ ] pairs without having to
think about the needed number of m4 quotations; most of the [ ] were
formerly missing in the --help output.

Cheers,
Ralf

[1] <http://www.gnu.org/software/autoconf/manual/html_node/Quadrigraphs.html>

:ADDPATCH configure:

2007-02-11  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* configure.ac: Rewrite 'configure --help' strings to look nicer.
	* configure: Regenerate.

Index: configure.ac
===================================================================
--- configure.ac	(Revision 121818)
+++ configure.ac	(Arbeitskopie)
@@ -321,7 +321,7 @@
 
 
 AC_ARG_ENABLE(libada,
-[  --enable-libada        Builds libada directory],
+[  --enable-libada         build libada directory],
 ENABLE_LIBADA=$enableval,
 ENABLE_LIBADA=yes)
 if test "${ENABLE_LIBADA}" != "yes" ; then
@@ -329,7 +329,7 @@
 fi
 
 AC_ARG_ENABLE(libssp,
-[  --enable-libssp        Builds libssp directory],
+[  --enable-libssp         build libssp directory],
 ENABLE_LIBSSP=$enableval,
 ENABLE_LIBSSP=yes)
 
@@ -1085,16 +1085,16 @@
 
 # Specify a location for mpfr
 # check for this first so it ends up on the link line before gmp.
-AC_ARG_WITH(mpfr-dir, [  --with-mpfr-dir=PATH    This option has been REMOVED],
+AC_ARG_WITH(mpfr-dir, [  --with-mpfr-dir=PATH    this option has been REMOVED],
   AC_MSG_ERROR([The --with-mpfr-dir=PATH option has been removed.
 Use --with-mpfr=PATH or --with-mpfr-include=PATH plus --with-mpfr-lib=PATH]))
 
-AC_ARG_WITH(mpfr, [  --with-mpfr=PATH        Specify prefix directory for installed MPFR package
+AC_ARG_WITH(mpfr, [  --with-mpfr=PATH        specify prefix directory for installed MPFR package.
                           Equivalent to --with-mpfr-include=PATH/include
                           plus --with-mpfr-lib=PATH/lib])
 AC_ARG_WITH(mpfr_include, [  --with-mpfr-include=PATH
-                          Specify directory for installed MPFR include files])
-AC_ARG_WITH(mpfr_lib, [  --with-mpfr-lib=PATH    Specify the directory for the installed MPFR library])
+                          specify directory for installed MPFR include files])
+AC_ARG_WITH(mpfr_lib, [  --with-mpfr-lib=PATH    specify directory for the installed MPFR library])
 
 if test "x$with_mpfr" != x; then
   gmplibs="-L$with_mpfr/lib $gmplibs"
@@ -1117,15 +1117,15 @@
 fi
 
 # Specify a location for gmp
-AC_ARG_WITH(gmp-dir, [  --with-gmp-dir=PATH     This option has been REMOVED],
+AC_ARG_WITH(gmp-dir, [  --with-gmp-dir=PATH     this option has been REMOVED],
   AC_MSG_ERROR([The --with-gmp-dir=PATH option has been removed.
 Use --with-gmp=PATH or --with-gmp-include=PATH plus --with-gmp-lib=PATH]))
 
-AC_ARG_WITH(gmp, [  --with-gmp=PATH         Specify prefix directory for the installed GMP package
+AC_ARG_WITH(gmp, [  --with-gmp=PATH         specify prefix directory for the installed GMP package.
                           Equivalent to --with-gmp-include=PATH/include
                           plus --with-gmp-lib=PATH/lib])
-AC_ARG_WITH(gmp_include, [  --with-gmp-include=PATH Specify directory for installed GMP include files])
-AC_ARG_WITH(gmp_lib, [  --with-gmp-lib=PATH     Specify the directory for the installed GMP library])
+AC_ARG_WITH(gmp_include, [  --with-gmp-include=PATH specify directory for installed GMP include files])
+AC_ARG_WITH(gmp_lib, [  --with-gmp-lib=PATH     specify directory for the installed GMP library])
 
 
 if test "x$with_gmp" != x; then
@@ -1367,7 +1367,7 @@
   done
 
   AC_ARG_ENABLE(stage1-languages,
-[  --enable-stage1-languages[=all]   choose additional languages to build during
+[  --enable-stage1-languages@<:@=all@:>@   choose additional languages to build during
                           stage1.  Mostly useful for compiler development.],
   [case ,${enable_stage1_languages}, in
     ,no,|,,)
@@ -1428,8 +1428,8 @@
 
 # Check for Boehm's garbage collector
 AC_ARG_ENABLE(objc-gc,
-[  --enable-objc-gc       enable the use of Boehm's garbage collector with
-                          the GNU Objective-C runtime.],
+[  --enable-objc-gc        enable use of Boehm's garbage collector with the
+                          GNU Objective-C runtime],
 [case ,${enable_languages},:${enable_objc_gc}:${noconfigdirs} in
   *,objc,*:*:yes:*target-boehm-gc*)
     AC_MSG_ERROR([Boehm's garbage collector was requested yet not supported in this configuration])
@@ -1581,7 +1581,7 @@
 copy_dirs=
 
 AC_ARG_WITH([build-sysroot], 
-  [  --with-build-sysroot=sysroot
+  [  --with-build-sysroot=SYSROOT
                           use sysroot as the system root during the build],
   [if test x"$withval" != x ; then
      SYSROOT_CFLAGS_FOR_TARGET="--sysroot=$withval"
@@ -1946,7 +1946,7 @@
 # not to nest @if/@endif pairs, because configure will not warn you at all.
 
 AC_ARG_ENABLE([bootstrap],
-[  --enable-bootstrap           Enable bootstrapping [yes if native build]],,
+[  --enable-bootstrap      enable bootstrapping @<:@yes if native build@:>@],,
 enable_bootstrap=default)
 
 # Issue errors and warnings for invalid/strange bootstrap combinations.
@@ -2040,10 +2040,10 @@
 # Create the serialization dependencies.  This uses a temporary file.
 
 AC_ARG_ENABLE([serial-configure],
-[  --enable-serial-[{host,target,build}-]configure
-                          Force sequential configuration of
+[  --enable-serial-@<:@{host,target,build}-@:>@configure
+                          force sequential configuration of
                           sub-packages for the host, target or build
-			  machine, or all sub-packages])
+                          machine, or all sub-packages])
 
 case ${enable_serial_configure} in
   yes)
@@ -2454,7 +2454,7 @@
 
 # Target tools.
 AC_ARG_WITH([build-time-tools], 
-  [  --with-build-time-tools=path
+  [  --with-build-time-tools=PATH
                           use given path to find target tools during the build],
   [case x"$withval" in
      x/*) ;;
@@ -2585,8 +2585,8 @@
 
 # Enable --enable-checking in stage1 of the compiler.
 AC_ARG_ENABLE(stage1-checking,
-[  --enable-stage1-checking[=all]   choose additional checking for stage1
-                          of the compiler.],
+[  --enable-stage1-checking@<:@=all@:>@   choose additional checking for stage1
+                          of the compiler],
 [stage1_checking=--enable-checking=${enable_stage1_checking}],
 [if test "x$enable_checking" = xno; then
   stage1_checking=--enable-checking
@@ -2611,17 +2611,17 @@
 
 # Flags needed to enable html installing and building
 AC_ARG_WITH(datarootdir,
-[  --with-datarootdir	Use datarootdir as the data root directory.],
+[  --with-datarootdir      use datarootdir as the data root directory],
 [datarootdir="\${prefix}/${withval}"],
 [datarootdir="\${prefix}/share"])
 
 AC_ARG_WITH(docdir,
-[  --with-docdir	Install documentation in this directory.],
+[  --with-docdir           install documentation in this directory],
 [docdir="\${prefix}/${withval}"],
 [docdir="\${datarootdir}/doc"])
 
 AC_ARG_WITH(htmldir,
-[  --with-htmldir	Install html in this directory.],
+[  --with-htmldir          install html in this directory],
 [htmldir="\${prefix}/${withval}"],
 [htmldir="\${docdir}"])