configure: remove pointless checks for yasm etc.

mplayer doesn't use yasm, as or ranlib. They were only needed to
build with internal libav, which is gone.

Also, get rid of nm. nm was used to find out how external symbols are
mangled. Replace this by a platform check in mangle.h. As far as I
know, sane systems don't mangle symbols. Windows prefixes them with
an underscore ("_symbol"). I don't know about OSX.

configure

@@ -152,19 +152,6 @@ EOF
   compile_check $TMPC $@
 }
 
-yasm_check() {
-  echo >> "$TMPLOG"
-  cat "$TMPS" >> "$TMPLOG"
-  echo >> "$TMPLOG"
-  echo "$_yasm $YASMFLAGS -o $TMPEXE $TMPS $@" >> "$TMPLOG"
-  rm -f "$TMPEXE"
-  $_yasm $YASMFLAGS -o "$TMPEXE" "$TMPS" "$@" >> "$TMPLOG" 2>&1
-  TMPRES="$?"
-  echo >> "$TMPLOG"
-  echo >> "$TMPLOG"
-  return "$TMPRES"
-}
-
 pkg_config_add() {
   unset IFS  # shell should not be used for programming
   echo >> "$TMPLOG"
@@ -445,12 +432,7 @@ Miscellaneous options:
   --enable-runtime-cpudetection    enable runtime CPU detection [disable]
   --enable-cross-compile enable cross-compilation [disable]
   --cc=COMPILER          C compiler to build MPlayer [gcc]
-  --as=ASSEMBLER         assembler to build MPlayer [as]
-  --nm=NM                nm tool to build MPlayer [nm]
-  --yasm=YASM            Yasm assembler to build MPlayer [yasm]
-  --ar=AR                librarian to build MPlayer [ar]
   --pkg-config=PKGCONFIG pkg-config to find some libraries [pkg-config]
-  --ranlib=RANLIB        ranlib to build MPlayer [ranlib]
   --windres=WINDRES      windres to build MPlayer [windres]
   --target=PLATFORM      target platform (i386-linux, arm-linux, etc)
   --enable-static        build a statically linked binary
@@ -518,14 +500,9 @@ _iwmmxt=auto
 _altivec=auto
 _install=install
 _pkg_config=auto
-_ranlib=auto
 _windres=auto
 _cc=auto
-_ar=auto
 test "$CC" && _cc="$CC"
-_as=auto
-_nm=auto
-_yasm=auto
 _runtime_cpudetection=no
 _cross_compile=no
 _prefix="/usr/local"
@@ -721,24 +698,9 @@ for ac_option do
   --cc=*)
     _cc=$(echo $ac_option | cut -d '=' -f 2)
     ;;
-  --as=*)
-    _as=$(echo $ac_option | cut -d '=' -f 2)
-    ;;
-  --nm=*)
-    _nm=$(echo $ac_option | cut -d '=' -f 2)
-    ;;
-  --yasm=*)
-    _yasm=$(echo $ac_option | cut -d '=' -f 2)
-    ;;
-  --ar=*)
-    _ar=$(echo $ac_option | cut -d '=' -f 2)
-    ;;
   --pkg-config=*)
     _pkg_config=$(echo $ac_option | cut -d '=' -f 2)
     ;;
-  --ranlib=*)
-    _ranlib=$(echo $ac_option | cut -d '=' -f 2)
-    ;;
   --windres=*)
     _windres=$(echo $ac_option | cut -d '=' -f 2)
     ;;
@@ -1110,10 +1072,7 @@ if test $_cross_compile = yes ; then
     test -n "$_target" && tool_prefix="$_target"-
 fi
 
-test "$_ranlib" = auto && _ranlib="$tool_prefix"ranlib
 test "$_windres" = auto && _windres="$tool_prefix"windres
-test "$_ar" = auto && _ar="$tool_prefix"ar
-test "$_yasm" = auto && _yasm="$tool_prefix"yasm
 test "$_pkg_config" = auto && _pkg_config="$tool_prefix"pkg-config
 
 if test "$_cc" = auto ; then
@@ -1238,10 +1197,6 @@ if aix ; then
   extra_ldflags="$extra_ldflags -lC"
 fi
 
-if linux ; then
-  _ranlib='true'
-fi
-
 if win32 ; then
   _exesuf=".exe"
   extra_cflags="$extra_cflags -fno-common"
@@ -1367,11 +1322,6 @@ if test "$_as" = auto ; then
   test -z "$_as" && _as=as
 fi
 
-if test "$_nm" = auto ; then
-  _nm=$($_cc -print-prog-name=nm)
-  test -z "$_nm" && _nm=nm
-fi
-
 # XXX: this should be ok..
 _cpuinfo="echo"
 
@@ -2104,18 +2054,6 @@ fi
 echores "$_byte_order"
 
 
-echocheck "extern symbol prefix"
-cat > $TMPC << EOF
-int ff_extern;
-EOF
-cc_check -c || die "Symbol mangling check failed."
-sym=$($_nm -P -g $TMPEXE)
-extern_prefix=${sym%%ff_extern*}
-def_extern_asm="#define EXTERN_ASM $extern_prefix"
-def_extern_prefix="#define EXTERN_PREFIX \"$extern_prefix\""
-echores $extern_prefix
-
-
 echocheck "assembler support of -pipe option"
 # -I. helps to detect compilers that just misunderstand -pipe like Sun C
 cflag_check -pipe -I. && _pipe="-pipe" && echores "yes" || echores "no"
@@ -2199,59 +2137,6 @@ if test -n "$CPPFLAGS" ; then
 fi
 
 
-
-if x86_32 ; then
-  # Checking assembler (_as) compatibility...
-  # Added workaround for older as that reads from stdin by default - atmos
-  as_version=$(echo '' | $_as -version 2>&1 | sed -n 's/^.*assembler \(version \)*\([0-9.]*\).*$/\2/p')
-  echocheck "assembler ($_as $as_version)"
-
-  _pref_as_version='2.9.1'
-  echo 'nop' > $TMPS
-  if test "$_mmx" = yes ; then
-    echo 'emms' >> $TMPS
-  fi
-  if test "$_3dnow" = yes ; then
-    _pref_as_version='2.10.1'
-    echo 'femms' >> $TMPS
-  fi
-  if test "$_3dnowext" = yes ; then
-    _pref_as_version='2.10.1'
-    echo 'pswapd %mm0, %mm0' >> $TMPS
-  fi
-  if test "$_mmxext" = yes ; then
-    _pref_as_version='2.10.1'
-    echo 'movntq %mm0, (%eax)' >> $TMPS
-  fi
-  if test "$_sse" = yes ; then
-    _pref_as_version='2.10.1'
-    echo 'xorps %xmm0, %xmm0' >> $TMPS
-  fi
-  #if test "$_sse2" = yes ; then
-  #  _pref_as_version='2.11'
-  #  echo 'xorpd %xmm0, %xmm0' >> $TMPS
-  #fi
-  if test "$_cmov" = yes ; then
-    _pref_as_version='2.10.1'
-    echo 'cmovb %eax, %ebx' >> $TMPS
-  fi
-  if test "$_ssse3" = yes ; then
-    _pref_as_version='2.16.92'
-    echo 'pabsd %xmm0, %xmm1' >> $TMPS
-  fi
-  $_as $TMPS -o $TMPEXE > /dev/null 2>&1 || as_verc_fail=yes
-
-  if test "$as_verc_fail" != yes ; then
-    echores "ok"
-  else
-    res_comment="Upgrade binutils to ${_pref_as_version} or use --disable-ssse3 etc."
-    echores "failed"
-    die "obsolete binutils version"
-  fi
-
-fi #if x86_32
-
-
 echocheck "PIC"
 pic=no
 cat > $TMPC << EOF
@@ -2301,48 +2186,8 @@ EOF
 cc_check && ebx_available=yes && def_ebx_available='#define HAVE_EBX_AVAILABLE 1'
 echores $ebx_available
 
-
-echocheck "yasm"
-if test -z "$YASMFLAGS" ; then
-  if darwin ; then
-    x86_64 && objformat="macho64" || objformat="macho"
-  elif win32 ; then
-    objformat="win32"
-  else
-    objformat="elf"
-  fi
-  # currently tested for Linux x86, x86_64
-  YASMFLAGS="-f $objformat"
-  x86_64 && YASMFLAGS="$YASMFLAGS -DARCH_X86_64 -m amd64"
-  test "$pic" = "yes" && YASMFLAGS="$YASMFLAGS -DPIC"
-  case "$objformat" in
-    elf) test $_debug && YASMFLAGS="$YASMFLAGS -g dwarf2" ;;
-    *)                   YASMFLAGS="$YASMFLAGS -DPREFIX"  ;;
-  esac
-else
-  warn_cflags=yes
-fi
-
-echo "pabsw xmm0, xmm0" > $TMPS
-yasm_check || _yasm=""
-if test $_yasm ; then
-  def_yasm='#define HAVE_YASM 1'
-  have_yasm="yes"
-  echores "$_yasm"
-else
-  def_yasm='#define HAVE_YASM 0'
-  have_yasm="no"
-  echores "no"
-fi
-
-echocheck "bswap"
-def_bswap='#define HAVE_BSWAP 0'
-echo 'bswap %eax' > $TMPS
-$_as $TMPS -o $TMPEXE > /dev/null 2>&1 && def_bswap='#define HAVE_BSWAP 1' && bswap=yes || bswap=no
-echores "$bswap"
 fi #if x86
 
-
 #FIXME: This should happen before the check for CFLAGS..
 def_altivec_h='#define HAVE_ALTIVEC_H 0'
 if ppc && ( test "$_altivec" = yes || test "$_runtime_cpudetection" = yes ) ; then
@@ -5577,8 +5422,6 @@ MANDIR  = \$(DESTDIR)$_mandir
 CONFDIR = \$(DESTDIR)$_confdir
 LOCALEDIR = \$(DESTDIR)$_localedir
 
-AR      = $_ar
-AS      = $_cc
 CC      = $_cc
 CXX     = $_cc
 INSTALL = $_install
@@ -5724,17 +5567,12 @@ YUV4MPEG = $_yuv4mpeg
 FFMPEG_INTERNALS = $ffmpeg_internals
 FFMPEG_SOURCE_PATH = $_ffmpeg_source
 
-RANLIB     = $_ranlib
-YASM       = $_yasm
-YASMFLAGS  = $YASMFLAGS
-
 CONFIG_VDPAU    = $_vdpau
 CONFIG_ZLIB     = $_zlib
 
 HAVE_PTHREADS   = $_pthreads
 HAVE_SHM        = $_shm
 HAVE_W32THREADS = $_w32threads
-HAVE_YASM       = $have_yasm
 
 EOF
 
@@ -5851,8 +5689,6 @@ $def_asmalign_pot
 $def_builtin_expect
 $def_dl
 $def_dos_paths
-$def_extern_asm
-$def_extern_prefix
 $def_iconv
 $def_kstat
 $def_macosx_bundle
@@ -6056,7 +5892,6 @@ $def_roundf
 $def_threads
 $def_truncf
 $def_xform_asm
-$def_yasm
 
 #define HAVE_INLINE_ASM 1
 
@@ -6130,7 +5965,7 @@ EOF
 if test "$warn_cflags" = yes; then
   cat <<EOF
 
-MPlayer compilation will use the CPPFLAGS/CFLAGS/LDFLAGS/YASMFLAGS set by you,
+MPlayer compilation will use the CPPFLAGS/CFLAGS/LDFLAGS set by you,
 but:
 
     *** ***  DO NOT REPORT BUGS IF IT DOES NOT COMPILE/WORK!  *** ***

mangle.h

@@ -31,6 +31,12 @@
 #define attribute_used
 #endif
 
+#if _WIN32
+#define EXTERN_PREFIX "_"
+#else
+#define EXTERN_PREFIX ""
+#endif
+
 #if ARCH_X86_64 && defined(PIC)
 #define MANGLE(a) EXTERN_PREFIX #a "(%%rip)"
 #else