Fix DESTDIR handling. DESTDIR got prepended twice for $(DESTDIR)$libdir

and similar since $libdir contained $prefix, which contained $(DESTDIR)..

Originally committed as revision 5754 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -24,7 +24,7 @@ show_help(){
   echo "Standard options:"
   echo "  --help                   print this message"
   echo "  --log[=FILE|yes|no]      log tests and output to FILE [config.err]"
-  echo "  --prefix=PREFIX          install in PREFIX [$prefix]"
+  echo "  --prefix=PREFIX          install in PREFIX [$PREFIX]"
   echo "  --libdir=DIR             install libs in DIR [PREFIX/lib]"
   echo "  --incdir=DIR             install includes in DIR [PREFIX/include/ffmpeg]"
   echo "  --mandir=DIR             install man page in DIR [PREFIX/man]"
@@ -322,11 +322,11 @@ TMPH="${TMPDIR1}/ffmpeg-conf-${RANDOM}-$$-${RANDOM}.h"
 # default parameters
 logging="yes"
 logfile="config.err"
-prefix="/usr/local"
-libdir='${prefix}/lib'
-incdir='${prefix}/include/ffmpeg'
-mandir='${prefix}/man'
-bindir='${prefix}/bin'
+PREFIX="/usr/local"
+libdir='${PREFIX}/lib'
+incdir='${PREFIX}/include/ffmpeg'
+mandir='${PREFIX}/man'
+bindir='${PREFIX}/bin'
 cross_prefix=""
 cross_compile="no"
 cc="gcc"
@@ -469,7 +469,7 @@ memalignhack="no"
 targetos=`uname -s`
 case $targetos in
 BeOS)
-prefix="/boot/home/config"
+PREFIX="/boot/home/config"
 # helps building libavcodec
 CFLAGS="$CFLAGS -DPIC -fomit-frame-pointer"
 # 3 gcc releases known for BeOS, each with ugly bugs
@@ -682,7 +682,7 @@ for opt do
   ;;
   --log=*) logging="$optval"
   ;;
-  --prefix=*) prefix="$optval"; force_prefix=yes
+  --prefix=*) PREFIX="$optval"; force_prefix=yes
   ;;
   --libdir=*) libdir="$optval"; force_libdir=yes
   ;;
@@ -894,8 +894,8 @@ EOF
     SLIBPREF=""
     SLIBSUF=".dll"
     EXESUF=".exe"
-    if test "$force_prefix" != yes; then prefix="$PROGRAMFILES/FFmpeg"; fi
-    if test "$force_libdir" != yes; then bindir="$prefix"; fi
+    if test "$force_prefix" != yes; then PREFIX="$PROGRAMFILES/FFmpeg"; fi
+    if test "$force_libdir" != yes; then bindir="$PREFIX"; fi
 fi
 
 # Combine FFLDFLAGS and the LDFLAGS environment variable
@@ -1475,7 +1475,7 @@ if test "$gprof" = "yes" ; then
     LDFLAGS="$LDFLAGS -p"
 fi
 
-echo "install prefix   $prefix"
+echo "install prefix   $PREFIX"
 echo "source path      $source_path"
 echo "C compiler       $cc"
 echo "make             $make"
@@ -1555,7 +1555,8 @@ echo "# Automatically generated by configure - do not modify!" > config.mak
 echo "/* Automatically generated by configure - do not modify! */" > $TMPH
 echo "#define FFMPEG_CONFIGURATION "'"'"$FFMPEG_CONFIGURATION"'"' >> $TMPH
 
-echo "prefix=\$(DESTDIR)$prefix" >> config.mak
+echo "PREFIX=$PREFIX" >> config.mak
+echo "prefix=\$(DESTDIR)\${PREFIX}" >> config.mak
 echo "libdir=\$(DESTDIR)$libdir" >> config.mak
 echo "incdir=\$(DESTDIR)$incdir" >> config.mak
 echo "bindir=\$(DESTDIR)$bindir" >> config.mak
@@ -2114,10 +2115,10 @@ rm -f $TMPO $TMPC $TMPE $TMPS $TMPH
 # build pkg-config files libav*.pc and libpostproc.pc
 # libavutil.pc
 cat <<EOF >libavutil.pc
-prefix=$prefix
-exec_prefix=\${prefix}
+prefix=$PREFIX
+exec_prefix=\${PREFIX}
 libdir=\${exec_prefix}/lib
-includedir=\${prefix}/include
+includedir=\${PREFIX}/include
 
 Name: libavutil
 Description: FFmpeg utility library
@@ -2145,10 +2146,10 @@ EOF
 
 # libavcodec.pc
 cat <<EOF >libavcodec.pc
-prefix=$prefix
-exec_prefix=\${prefix}
+prefix=$PREFIX
+exec_prefix=\${PREFIX}
 libdir=\${exec_prefix}/lib
-includedir=\${prefix}/include
+includedir=\${PREFIX}/include
 
 Name: libavcodec
 Description: FFmpeg codec library
@@ -2176,10 +2177,10 @@ EOF
 
 # libavformat.pc
 cat <<EOF >libavformat.pc
-prefix=$prefix
-exec_prefix=\${prefix}
+prefix=$PREFIX
+exec_prefix=\${PREFIX}
 libdir=\${exec_prefix}/lib
-includedir=\${prefix}/include
+includedir=\${PREFIX}/include
 
 Name: libavformat
 Description: FFmpeg container format library
@@ -2208,10 +2209,10 @@ EOF
 
 # libpostproc.pc
 cat <<EOF >libpostproc.pc
-prefix=$prefix
-exec_prefix=\${prefix}
+prefix=$PREFIX
+exec_prefix=\${PREFIX}
 libdir=\${exec_prefix}/lib
-includedir=\${prefix}/include
+includedir=\${PREFIX}/include
 
 Name: libpostproc
 Description: FFmpeg post processing library