SDL-1.2: configure: fix wrong AS_HELP_STRING quoting.

From 8aaff1b0565212b59ce3801152800ffd0f03ef0c Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Wed, 3 Mar 2021 11:55:02 +0300
Subject: [PATCH] configure: fix wrong AS_HELP_STRING quoting.

---
 configure    | 201 +++++++++++++++++++++++++--------------------------
 configure.ac | 158 ++++++++++++++++++++--------------------
 2 files changed, 177 insertions(+), 182 deletions(-)

diff --git a/configure b/configure
index dad9ce60..062feae9 100755
--- a/configure
+++ b/configure
@@ -1645,104 +1645,99 @@ Optional Features:
   --enable-fast-install[=PKGS]
                           optimize for fast installation [default=yes]
   --disable-libtool-lock  avoid locking (might break parallel builds)
-  --enable-libc           Use the system C library [[default=yes]]
-  --enable-audio          Enable the audio subsystem [[default=yes]]
-  --enable-video          Enable the video subsystem [[default=yes]]
-  --enable-events         Enable the events subsystem [[default=yes]]
-  --enable-joystick       Enable the joystick subsystem [[default=yes]]
-  --enable-cdrom          Enable the cdrom subsystem [[default=yes]]
-  --enable-threads        Enable the threading subsystem [[default=yes]]
-  --enable-timers         Enable the timer subsystem [[default=yes]]
-  --enable-file           Enable the file subsystem [[default=yes]]
+  --enable-libc           Use the system C library [default=yes]
+  --enable-audio          Enable the audio subsystem [default=yes]
+  --enable-video          Enable the video subsystem [default=yes]
+  --enable-events         Enable the events subsystem [default=yes]
+  --enable-joystick       Enable the joystick subsystem [default=yes]
+  --enable-cdrom          Enable the cdrom subsystem [default=yes]
+  --enable-threads        Enable the threading subsystem [default=yes]
+  --enable-timers         Enable the timer subsystem [default=yes]
+  --enable-file           Enable the file subsystem [default=yes]
   --enable-loadso         Enable the shared object loading subsystem
-                          [[default=yes]]
-  --enable-cpuinfo        Enable the cpuinfo subsystem [[default=yes]]
-  --enable-assembly       Enable assembly routines [[default=yes]]
-  --enable-oss            support the OSS audio API [[default=yes]]
-  --enable-alsa           support the ALSA audio API [[default=yes]]
+                          [default=yes]
+  --enable-cpuinfo        Enable the cpuinfo subsystem [default=yes]
+  --enable-assembly       Enable assembly routines [default=yes]
+  --enable-oss            support the OSS audio API [default=yes]
+  --enable-alsa           support the ALSA audio API [default=yes]
   --disable-alsatest      Do not try to compile and run a test Alsa program
-  --enable-alsa-shared    dynamically load ALSA audio support [[default=yes]]
-  --enable-esd            support the Enlightened Sound Daemon [[default=yes]]
+  --enable-alsa-shared    dynamically load ALSA audio support [default=yes]
+  --enable-esd            support the Enlightened Sound Daemon [default=yes]
   --disable-esdtest       Do not try to compile and run a test ESD program
-  --enable-esd-shared     dynamically load ESD audio support [[default=yes]]
-  --enable-sndio          support the sndio audio API [[default=yes]]
-  --enable-pulseaudio     use PulseAudio [[default=yes]]
+  --enable-esd-shared     dynamically load ESD audio support [default=yes]
+  --enable-sndio          support the sndio audio API [default=yes]
+  --enable-pulseaudio     use PulseAudio [default=yes]
   --enable-pulseaudio-shared
-                          dynamically load PulseAudio support [[default=yes]]
+                          dynamically load PulseAudio support [default=yes]
   --enable-arts           support the Analog Real Time Synthesizer
-                          [[default=yes]]
-  --enable-arts-shared    dynamically load aRts audio support [[default=yes]]
-  --enable-nas            support the NAS audio API [[default=yes]]
-  --enable-nas-shared     dynamically load NAS audio support [[default=yes]]
-  --enable-diskaudio      support the disk writer audio driver [[default=yes]]
-  --enable-dummyaudio     support the dummy audio driver [[default=yes]]
-  --enable-mintaudio      support Atari audio driver [[default=yes]]
-  --enable-nasm           use nasm assembly blitters on x86 [[default=yes]]
-  --enable-altivec        use altivec assembly blitters on PPC [[default=yes]]
-  --enable-arm-simd       use SIMD assembly blitters on ARM [[default=no]]
-  --enable-arm-neon       use NEON assembly blitters on ARM [[default=no]]
-  --enable-ipod           configure SDL to work with iPodLinux [[default=no]]
-  --enable-video-nanox    use nanox video driver [[default=no]]
-  --enable-nanox-debug    print debug messages [[default=no]]
+                          [default=yes]
+  --enable-arts-shared    dynamically load aRts audio support [default=yes]
+  --enable-nas            support the NAS audio API [default=yes]
+  --enable-nas-shared     dynamically load NAS audio support [default=yes]
+  --enable-diskaudio      support the disk writer audio driver [default=yes]
+  --enable-dummyaudio     support the dummy audio driver [default=yes]
+  --enable-mintaudio      support Atari audio driver [default=yes]
+  --enable-nasm           use nasm assembly blitters on x86 [default=yes]
+  --enable-altivec        use altivec assembly blitters on PPC [default=yes]
+  --enable-arm-simd       use SIMD assembly blitters on ARM [default=no]
+  --enable-arm-neon       use NEON assembly blitters on ARM [default=no]
+  --enable-ipod           configure SDL to work with iPodLinux [default=no]
+  --enable-video-nanox    use nanox video driver [default=no]
+  --enable-nanox-debug    print debug messages [default=no]
   --enable-nanox-share-memory
-                          use share memory [[default=no]]
+                          use share memory [default=no]
   --enable-nanox-direct-fb
-                          use direct framebuffer access [[default=no]]
-  --enable-video-x11      use X11 video driver [[default=yes]]
-  --enable-x11-shared     dynamically load X11 support [[default=maybe]]
-  --enable-dga            allow use of X11 DGA code [[default=yes]]
-  --enable-video-dga      use DGA 2.0 video driver [[default=yes]]
+                          use direct framebuffer access [default=no]
+  --enable-video-x11      use X11 video driver [default=yes]
+  --enable-x11-shared     dynamically load X11 support [default=maybe]
+  --enable-dga            allow use of X11 DGA code [default=yes]
+  --enable-video-dga      use DGA 2.0 video driver [default=yes]
   --enable-video-x11-dgamouse
-                          use X11 DGA for mouse events [[default=yes]]
-  --enable-video-x11-vm   use X11 VM extension for fullscreen [[default=yes]]
-  --enable-video-x11-xv   use X11 XvImage extension for video [[default=yes]]
+                          use X11 DGA for mouse events [default=yes]
+  --enable-video-x11-vm   use X11 VM extension for fullscreen [default=yes]
+  --enable-video-x11-xv   use X11 XvImage extension for video [default=yes]
   --enable-video-x11-xinerama
-                          enable X11 Xinerama support [[default=yes]]
-  --enable-video-x11-xme  enable Xi Graphics XME for fullscreen
-                          [[default=yes]]
+                          enable X11 Xinerama support [default=yes]
+  --enable-video-x11-xme  enable Xi Graphics XME for fullscreen [default=yes]
   --enable-video-x11-xrandr
                           enable X11 Xrandr extension for fullscreen
-                          [[default=yes]]
-  --enable-video-photon   use QNX Photon video driver [[default=yes]]
-  --enable-video-carbon   use Carbon/QuickDraw video driver [[default=no]]
-  --enable-video-cocoa    use Cocoa/Quartz video driver [[default=yes]]
-  --enable-video-fbcon    use framebuffer console video driver [[default=yes]]
-  --enable-video-directfb use DirectFB video driver [[default=yes]]
-  --enable-video-ps2gs    use PlayStation 2 GS video driver [[default=yes]]
-  --enable-video-ps3      use PlayStation 3 Cell driver [[default=yes]]
-  --enable-video-ggi      use GGI video driver [[default=no]]
-  --enable-video-svga     use SVGAlib video driver [[default=yes]]
-  --enable-video-vgl      use VGL video driver [[default=yes]]
-  --enable-video-wscons   use wscons video driver [[default=yes]]
-  --enable-video-aalib    use AAlib video driver [[default=no]]
-  --enable-video-caca     use libcaca video driver [[default=no]]
-  --enable-video-qtopia   use Qtopia video driver [[default=no]]
-  --enable-video-picogui  use PicoGUI video driver [[default=no]]
-  --enable-video-xbios    use Atari Xbios video driver [[default=yes]]
-  --enable-video-gem      use Atari Gem video driver [[default=yes]]
-  --enable-video-dummy    use dummy video driver [[default=yes]]
-  --enable-video-opengl   include OpenGL context creation [[default=yes]]
-  --enable-osmesa-shared  dynamically load OSMesa OpenGL support
-                          [[default=yes]]
+                          [default=yes]
+  --enable-video-photon   use QNX Photon video driver [default=yes]
+  --enable-video-carbon   use Carbon/QuickDraw video driver [default=no]
+  --enable-video-cocoa    use Cocoa/Quartz video driver [default=yes]
+  --enable-video-fbcon    use framebuffer console video driver [default=yes]
+  --enable-video-directfb use DirectFB video driver [default=yes]
+  --enable-video-ps2gs    use PlayStation 2 GS video driver [default=yes]
+  --enable-video-ps3      use PlayStation 3 Cell driver [default=yes]
+  --enable-video-ggi      use GGI video driver [default=no]
+  --enable-video-svga     use SVGAlib video driver [default=yes]
+  --enable-video-vgl      use VGL video driver [default=yes]
+  --enable-video-wscons   use wscons video driver [default=yes]
+  --enable-video-aalib    use AAlib video driver [default=no]
+  --enable-video-caca     use libcaca video driver [default=no]
+  --enable-video-qtopia   use Qtopia video driver [default=no]
+  --enable-video-picogui  use PicoGUI video driver [default=no]
+  --enable-video-xbios    use Atari Xbios video driver [default=yes]
+  --enable-video-gem      use Atari Gem video driver [default=yes]
+  --enable-video-dummy    use dummy video driver [default=yes]
+  --enable-video-opengl   include OpenGL context creation [default=yes]
+  --enable-osmesa-shared  dynamically load OSMesa OpenGL support [default=yes]
   --enable-screensaver    enable screensaver by default while any SDL
-                          application is running [[default=no]]
-  --enable-input-events   use Linux 2.4 unified input interface
-                          [[default=yes]]
-  --enable-input-tslib    use the Touchscreen library for input
-                          [[default=yes]]
+                          application is running [default=no]
+  --enable-input-events   use Linux 2.4 unified input interface [default=yes]
+  --enable-input-tslib    use the Touchscreen library for input [default=yes]
   --enable-pth            use GNU pth library for multi-threading
-                          [[default=yes]]
-  --enable-pthreads       use POSIX threads for multi-threading
-                          [[default=yes]]
-  --enable-pthread-sem    use pthread semaphores [[default=yes]]
-  --enable-stdio-redirect Redirect STDIO to files on Win32 [[default=yes]]
-  --enable-directx        use DirectX for Win32 audio/video [[default=yes]]
-  --enable-sdl-dlopen     use dlopen for shared object loading [[default=yes]]
+                          [default=yes]
+  --enable-pthreads       use POSIX threads for multi-threading [default=yes]
+  --enable-pthread-sem    use pthread semaphores [default=yes]
+  --enable-stdio-redirect Redirect STDIO to files on Win32 [default=yes]
+  --enable-directx        use DirectX for Win32 audio/video [default=yes]
+  --enable-sdl-dlopen     use dlopen for shared object loading [default=yes]
   --enable-atari-ldg      use Atari LDG for shared object loading
-                          [[default=yes]]
+                          [default=yes]
   --enable-clock_gettime  use clock_gettime() instead of gettimeofday() on
-                          UNIX [[default=no]]
-  --enable-rpath          use an rpath when linking SDL [[default=yes]]
+                          UNIX [default=no]
+  --enable-rpath          use an rpath when linking SDL [default=yes]
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -4833,13 +4828,13 @@ if ${lt_cv_nm_interface+:} false; then :
 else
   lt_cv_nm_interface="BSD nm"
   echo "int some_variable = 0;" > conftest.$ac_ext
-  (eval echo "\"\$as_me:4836: $ac_compile\"" >&5)
+  (eval echo "\"\$as_me:4831: $ac_compile\"" >&5)
   (eval "$ac_compile" 2>conftest.err)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:4839: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval echo "\"\$as_me:4834: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
   (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:4842: output\"" >&5)
+  (eval echo "\"\$as_me:4837: output\"" >&5)
   cat conftest.out >&5
   if $GREP 'External.*some_variable' conftest.out > /dev/null; then
     lt_cv_nm_interface="MS dumpbin"
@@ -6049,7 +6044,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 6052 "configure"' > conftest.$ac_ext
+  echo '#line 6047 "configure"' > conftest.$ac_ext
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -7612,11 +7607,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7615: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7610: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:7619: \$? = $ac_status" >&5
+   echo "$as_me:7614: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -7951,11 +7946,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7954: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7949: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:7958: \$? = $ac_status" >&5
+   echo "$as_me:7953: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -8056,11 +8051,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8059: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8054: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:8063: \$? = $ac_status" >&5
+   echo "$as_me:8058: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -8111,11 +8106,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:8114: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:8109: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:8118: \$? = $ac_status" >&5
+   echo "$as_me:8113: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -10481,7 +10476,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10484 "configure"
+#line 10479 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10577,7 +10572,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10580 "configure"
+#line 10575 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -13992,11 +13987,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:13995: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:13990: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:13999: \$? = $ac_status" >&5
+   echo "$as_me:13994: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -14091,11 +14086,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:14094: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:14089: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:14098: \$? = $ac_status" >&5
+   echo "$as_me:14093: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -14143,11 +14138,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:14146: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:14141: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:14150: \$? = $ac_status" >&5
+   echo "$as_me:14145: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
diff --git a/configure.ac b/configure.ac
index a167439c..983e6c1c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -131,7 +131,7 @@ AC_C_VOLATILE
 
 dnl See whether we are allowed to use the system C library
 AC_ARG_ENABLE(libc,
-AS_HELP_STRING([--enable-libc], [Use the system C library [[default=yes]]]),
+[AS_HELP_STRING([--enable-libc], [Use the system C library [default=yes]])],
               , enable_libc=yes)
 if test x$enable_libc = xyes; then
     AC_DEFINE(HAVE_LIBC)
@@ -242,25 +242,25 @@ SOURCES="$SOURCES $srcdir/src/video/*.c"
 dnl Enable/disable various subsystems of the SDL library
 
 AC_ARG_ENABLE(audio,
-AS_HELP_STRING([--enable-audio], [Enable the audio subsystem [[default=yes]]]),
+[AS_HELP_STRING([--enable-audio], [Enable the audio subsystem [default=yes]])],
               , enable_audio=yes)
 if test x$enable_audio != xyes; then
     AC_DEFINE(SDL_AUDIO_DISABLED)
 fi
 AC_ARG_ENABLE(video,
-AS_HELP_STRING([--enable-video], [Enable the video subsystem [[default=yes]]]),
+[AS_HELP_STRING([--enable-video], [Enable the video subsystem [default=yes]])],
               , enable_video=yes)
 if test x$enable_video != xyes; then
     AC_DEFINE(SDL_VIDEO_DISABLED)
 fi
 AC_ARG_ENABLE(events,
-AS_HELP_STRING([--enable-events], [Enable the events subsystem [[default=yes]]]),
+[AS_HELP_STRING([--enable-events], [Enable the events subsystem [default=yes]])],
               , enable_events=yes)
 if test x$enable_events != xyes; then
     AC_DEFINE(SDL_EVENTS_DISABLED)
 fi
 AC_ARG_ENABLE(joystick,
-AS_HELP_STRING([--enable-joystick], [Enable the joystick subsystem [[default=yes]]]),
+[AS_HELP_STRING([--enable-joystick], [Enable the joystick subsystem [default=yes]])],
               , enable_joystick=yes)
 if test x$enable_joystick != xyes; then
     AC_DEFINE(SDL_JOYSTICK_DISABLED)
@@ -268,43 +268,43 @@ else
     SOURCES="$SOURCES $srcdir/src/joystick/*.c"
 fi
 AC_ARG_ENABLE(cdrom,
-AS_HELP_STRING([--enable-cdrom], [Enable the cdrom subsystem [[default=yes]]]),
+[AS_HELP_STRING([--enable-cdrom], [Enable the cdrom subsystem [default=yes]])],
               , enable_cdrom=yes)
 if test x$enable_cdrom != xyes; then
     AC_DEFINE(SDL_CDROM_DISABLED)
 fi
 AC_ARG_ENABLE(threads,
-AS_HELP_STRING([--enable-threads], [Enable the threading subsystem [[default=yes]]]),
+[AS_HELP_STRING([--enable-threads], [Enable the threading subsystem [default=yes]])],
               , enable_threads=yes)
 if test x$enable_threads != xyes; then
     AC_DEFINE(SDL_THREADS_DISABLED)
 fi
 AC_ARG_ENABLE(timers,
-AS_HELP_STRING([--enable-timers], [Enable the timer subsystem [[default=yes]]]),
+[AS_HELP_STRING([--enable-timers], [Enable the timer subsystem [default=yes]])],
               , enable_timers=yes)
 if test x$enable_timers != xyes; then
     AC_DEFINE(SDL_TIMERS_DISABLED)
 fi
 AC_ARG_ENABLE(file,
-AS_HELP_STRING([--enable-file], [Enable the file subsystem [[default=yes]]]),
+[AS_HELP_STRING([--enable-file], [Enable the file subsystem [default=yes]])],
               , enable_file=yes)
 if test x$enable_file != xyes; then
     AC_DEFINE(SDL_FILE_DISABLED)
 fi
 AC_ARG_ENABLE(loadso,
-AS_HELP_STRING([--enable-loadso], [Enable the shared object loading subsystem [[default=yes]]]),
+[AS_HELP_STRING([--enable-loadso], [Enable the shared object loading subsystem [default=yes]])],
               , enable_loadso=yes)
 if test x$enable_loadso != xyes; then
     AC_DEFINE(SDL_LOADSO_DISABLED)
 fi
 AC_ARG_ENABLE(cpuinfo,
-AS_HELP_STRING([--enable-cpuinfo], [Enable the cpuinfo subsystem [[default=yes]]]),
+[AS_HELP_STRING([--enable-cpuinfo], [Enable the cpuinfo subsystem [default=yes]])],
               , enable_cpuinfo=yes)
 if test x$enable_cpuinfo != xyes; then
     AC_DEFINE(SDL_CPUINFO_DISABLED)
 fi
 AC_ARG_ENABLE(assembly,
-AS_HELP_STRING([--enable-assembly], [Enable assembly routines [[default=yes]]]),
+[AS_HELP_STRING([--enable-assembly], [Enable assembly routines [default=yes]])],
               , enable_assembly=yes)
 if test x$enable_assembly = xyes; then
     AC_DEFINE(SDL_ASSEMBLY_ROUTINES)
@@ -314,7 +314,7 @@ dnl See if the OSS audio interface is supported
 CheckOSS()
 {
     AC_ARG_ENABLE(oss,
-AS_HELP_STRING([--enable-oss], [support the OSS audio API [[default=yes]]]),
+[AS_HELP_STRING([--enable-oss], [support the OSS audio API [default=yes]])],
                   , enable_oss=yes)
     if test x$enable_audio = xyes -a x$enable_oss = xyes; then
         AC_MSG_CHECKING(for OSS audio support)
@@ -358,7 +358,7 @@ dnl See if the ALSA audio interface is supported
 CheckALSA()
 {
     AC_ARG_ENABLE(alsa,
-AS_HELP_STRING([--enable-alsa], [support the ALSA audio API [[default=yes]]]),
+[AS_HELP_STRING([--enable-alsa], [support the ALSA audio API [default=yes]])],
                   , enable_alsa=yes)
     if test x$enable_audio = xyes -a x$enable_alsa = xyes; then
         AM_PATH_ALSA(0.9.0, have_alsa=yes, have_alsa=no)
@@ -368,7 +368,7 @@ AS_HELP_STRING([--enable-alsa], [support the ALSA audio API [[default=yes]]]),
         LIBS="$alsa_save_LIBS"
         if test x$have_alsa = xyes; then
             AC_ARG_ENABLE(alsa-shared,
-AS_HELP_STRING([--enable-alsa-shared], [dynamically load ALSA audio support [[default=yes]]]),
+[AS_HELP_STRING([--enable-alsa-shared], [dynamically load ALSA audio support [default=yes]])],
                           , enable_alsa_shared=yes)
             alsa_lib=[`find_lib "libasound.so.*" "$ALSA_LIBS" | sed 's/.*\/\(.*\)/\1/; q'`]
 
@@ -457,13 +457,13 @@ dnl Find the ESD includes and libraries
 CheckESD()
 {
     AC_ARG_ENABLE(esd,
-AS_HELP_STRING([--enable-esd], [support the Enlightened Sound Daemon [[default=yes]]]),
+[AS_HELP_STRING([--enable-esd], [support the Enlightened Sound Daemon [default=yes]])],
                   , enable_esd=yes)
     if test x$enable_audio = xyes -a x$enable_esd = xyes; then
         AM_PATH_ESD(0.2.8, have_esd=yes, have_esd=no)
         if test x$have_esd = xyes; then
             AC_ARG_ENABLE(esd-shared,
-AS_HELP_STRING([--enable-esd-shared], [dynamically load ESD audio support [[default=yes]]]),
+[AS_HELP_STRING([--enable-esd-shared], [dynamically load ESD audio support [default=yes]])],
                           , enable_esd_shared=yes)
             esd_lib=[`find_lib "libesd.so.*" "$ESD_LIBS" | sed 's/.*\/\(.*\)/\1/; q'`]
 
@@ -490,7 +490,7 @@ dnl Find Sndio
 CheckSndio()
 {
     AC_ARG_ENABLE(sndio,
-AS_HELP_STRING([--enable-sndio], [support the sndio audio API [[default=yes]]]),
+[AS_HELP_STRING([--enable-sndio], [support the sndio audio API [default=yes]])],
                   , enable_sndioaudio=yes)
     if test x$enable_audio = xyes -a x$enable_sndioaudio = xyes; then
         AC_CHECK_HEADER(sndio.h, have_sndio_hdr=yes)
@@ -519,14 +519,14 @@ dnl Find PulseAudio
 CheckPulseAudio()
 {
     AC_ARG_ENABLE(pulseaudio,
-AS_HELP_STRING([--enable-pulseaudio], [use PulseAudio [[default=yes]]]),
+[AS_HELP_STRING([--enable-pulseaudio], [use PulseAudio [default=yes]])],
                   , enable_pulseaudio=yes)
     if test x$enable_audio = xyes -a x$enable_pulseaudio = xyes; then
         PKG_CHECK_MODULES([PULSE], [libpulse-simple >= 0.9], audio_pulse=yes, audio_pulse=no)
 
         if test x$audio_pulse = xyes; then
             AC_ARG_ENABLE(pulseaudio-shared,
-AS_HELP_STRING([--enable-pulseaudio-shared], [dynamically load PulseAudio support [[default=yes]]]),
+[AS_HELP_STRING([--enable-pulseaudio-shared], [dynamically load PulseAudio support [default=yes]])],
                           , enable_pulseaudio_shared=yes)
             pulse_lib=[`find_lib "libpulse-simple.so.*" "$PULSE_LIBS" | sed 's/.*\/\(.*\)/\1/; q'`]
 
@@ -560,7 +560,7 @@ AS_HELP_STRING([--enable-pulseaudio-shared], [dynamically load PulseAudio suppor
 CheckARTSC()
 {
     AC_ARG_ENABLE(arts,
-AS_HELP_STRING([--enable-arts], [support the Analog Real Time Synthesizer [[default=yes]]]),
+[AS_HELP_STRING([--enable-arts], [support the Analog Real Time Synthesizer [default=yes]])],
                   , enable_arts=yes)
     if test x$enable_audio = xyes -a x$enable_arts = xyes; then
         AC_PATH_PROG(ARTSCONFIG, artsc-config)
@@ -584,7 +584,7 @@ AS_HELP_STRING([--enable-arts], [support the Analog Real Time Synthesizer [[defa
             AC_MSG_RESULT($audio_arts)
             if test x$audio_arts = xyes; then
                 AC_ARG_ENABLE(arts-shared,
-AS_HELP_STRING([--enable-arts-shared], [dynamically load aRts audio support [[default=yes]]]),
+[AS_HELP_STRING([--enable-arts-shared], [dynamically load aRts audio support [default=yes]])],
                               , enable_arts_shared=yes)
                 arts_lib=[`find_lib "libartsc.so.*" "$ARTS_LIBS" | sed 's/.*\/\(.*\)/\1/; q'`]
 
@@ -612,7 +612,7 @@ dnl See if the NAS audio interface is supported
 CheckNAS()
 {
     AC_ARG_ENABLE(nas,
-AS_HELP_STRING([--enable-nas], [support the NAS audio API [[default=yes]]]),
+[AS_HELP_STRING([--enable-nas], [support the NAS audio API [default=yes]])],
                   , enable_nas=yes)
     if test x$enable_audio = xyes -a x$enable_nas = xyes; then
         AC_CHECK_HEADER(audio/audiolib.h, have_nas_hdr=yes)
@@ -642,7 +642,7 @@ AS_HELP_STRING([--enable-nas], [support the NAS audio API [[default=yes]]]),
 
         if test x$have_nas = xyes; then
             AC_ARG_ENABLE(nas-shared,
-AS_HELP_STRING([--enable-nas-shared], [dynamically load NAS audio support [[default=yes]]]),
+[AS_HELP_STRING([--enable-nas-shared], [dynamically load NAS audio support [default=yes]])],
                           , enable_nas_shared=yes)
             nas_lib=[`find_lib "libaudio.so.*" "$NAS_LIBS" | sed 's/.*\/\(.*\)/\1/; q'`]
 
@@ -670,7 +670,7 @@ dnl rcg07142001 See if the user wants the disk writer audio driver...
 CheckDiskAudio()
 {
     AC_ARG_ENABLE(diskaudio,
-AS_HELP_STRING([--enable-diskaudio], [support the disk writer audio driver [[default=yes]]]),
+[AS_HELP_STRING([--enable-diskaudio], [support the disk writer audio driver [default=yes]])],
                   , enable_diskaudio=yes)
     if test x$enable_audio = xyes -a x$enable_diskaudio = xyes; then
         AC_DEFINE(SDL_AUDIO_DRIVER_DISK)
@@ -682,7 +682,7 @@ dnl rcg03142006 See if the user wants the dummy audio driver...
 CheckDummyAudio()
 {
     AC_ARG_ENABLE(dummyaudio,
-AS_HELP_STRING([--enable-dummyaudio], [support the dummy audio driver [[default=yes]]]),
+[AS_HELP_STRING([--enable-dummyaudio], [support the dummy audio driver [default=yes]])],
                   , enable_dummyaudio=yes)
     if test x$enable_audio = xyes -a x$enable_dummyaudio = xyes; then
         AC_DEFINE(SDL_AUDIO_DRIVER_DUMMY)
@@ -694,7 +694,7 @@ dnl Set up the Atari Audio driver
 CheckAtariAudio()
 {
     AC_ARG_ENABLE(mintaudio,
-AS_HELP_STRING([--enable-mintaudio], [support Atari audio driver [[default=yes]]]),
+[AS_HELP_STRING([--enable-mintaudio], [support Atari audio driver [default=yes]])],
                   , enable_mintaudio=yes)
     if test x$enable_audio = xyes -a x$enable_mintaudio = xyes; then
         mintaudio=no
@@ -732,7 +732,7 @@ CheckNASM()
 
     dnl Check for NASM (for assembly blit routines)
     AC_ARG_ENABLE(nasm,
-AS_HELP_STRING([--enable-nasm], [use nasm assembly blitters on x86 [[default=yes]]]),
+[AS_HELP_STRING([--enable-nasm], [use nasm assembly blitters on x86 [default=yes]])],
                   , enable_nasm=yes)
     if test x$enable_video = xyes -a x$enable_assembly = xyes -a x$enable_nasm = xyes; then
         CompileNASM()
@@ -797,7 +797,7 @@ dnl Check for altivec instruction support using gas syntax
 CheckAltivec()
 {
     AC_ARG_ENABLE(altivec,
-AS_HELP_STRING([--enable-altivec], [use altivec assembly blitters on PPC [[default=yes]]]),
+[AS_HELP_STRING([--enable-altivec], [use altivec assembly blitters on PPC [default=yes]])],
                   , enable_altivec=yes)
     if test x$enable_video = xyes -a x$enable_assembly = xyes -a x$enable_altivec = xyes; then
         save_CFLAGS="$CFLAGS"
@@ -847,7 +847,7 @@ dnl Check for altivec instruction support - APPLE extensions
 CheckAltivecApple()
 {
     AC_ARG_ENABLE(altivec,
-AS_HELP_STRING([--enable-altivec], [use altivec assembly blitters on PPC [[default=yes]]]),
+[AS_HELP_STRING([--enable-altivec], [use altivec assembly blitters on PPC [default=yes]])],
                   , enable_altivec=yes)
     if test x$enable_video = xyes -a x$enable_assembly = xyes -a x$enable_altivec = xyes; then
         save_CFLAGS="$CFLAGS"
@@ -884,7 +884,7 @@ dnl Check for ARM instruction support using gas syntax
 CheckARM()
 {
     AC_ARG_ENABLE(arm-simd,
-AS_HELP_STRING([--enable-arm-simd], [use SIMD assembly blitters on ARM [[default=no]]]),
+[AS_HELP_STRING([--enable-arm-simd], [use SIMD assembly blitters on ARM [default=no]])],
                   enable_arm_simd=$enableval, enable_arm_simd=no)
     if test x$enable_video = xyes -a x$enable_assembly = xyes -a x$enable_arm_simd = xyes; then
         save_CFLAGS="$CFLAGS"
@@ -919,7 +919,7 @@ dnl Check for ARM NEON instruction support using gas syntax
 CheckNEON()
 {
     AC_ARG_ENABLE(arm-neon,
-AS_HELP_STRING([--enable-arm-neon], [use NEON assembly blitters on ARM [[default=no]]]),
+[AS_HELP_STRING([--enable-arm-neon], [use NEON assembly blitters on ARM [default=no]])],
                   enable_arm_neon=$enableval, enable_arm_neon=no)
     if test x$enable_video = x

(Patch may be truncated, please check the link at the top of this post.)