achille@acheron Desktop ~/Desktop 
% sudo port install mplayer
Portfile changed since last build; discarding previous state.
--->  Fetching jpeg
--->  Verifying checksum(s) for jpeg
--->  Extracting jpeg
--->  Applying patches to jpeg
--->  Configuring jpeg
--->  Building jpeg with target all
--->  Staging jpeg into destroot
--->  Installing jpeg 6b_2
--->  Activating jpeg 6b_2
--->  Cleaning jpeg
--->  Fetching lame
--->  Verifying checksum(s) for lame
--->  Extracting lame
--->  Configuring lame
--->  Building lame with target all
--->  Staging lame into destroot
--->  Installing lame 3.97_0
--->  Activating lame 3.97_0
--->  Cleaning lame
--->  Fetching libmad
--->  Verifying checksum(s) for libmad
--->  Extracting libmad
--->  Configuring libmad
--->  Building libmad with target all
--->  Staging libmad into destroot
--->  Installing libmad 0.15.1b_1
--->  Activating libmad 0.15.1b_1
--->  Cleaning libmad
--->  Fetching libogg
--->  Verifying checksum(s) for libogg
--->  Extracting libogg
--->  Configuring libogg
--->  Building libogg with target all
--->  Staging libogg into destroot
--->  Installing libogg 1.1.3_2
--->  Activating libogg 1.1.3_2
--->  Cleaning libogg
--->  Fetching libungif
--->  Verifying checksum(s) for libungif
--->  Extracting libungif
--->  Applying patches to libungif
--->  Configuring libungif
--->  Building libungif with target all
--->  Staging libungif into destroot
--->  Installing libungif 4.1.4_2
--->  Activating libungif 4.1.4_2
--->  Cleaning libungif
--->  Fetching libvorbis
--->  Attempting to fetch libvorbis-1.2.0.tar.gz from http://downloads.xiph.org/releases/vorbis/
--->  Verifying checksum(s) for libvorbis
--->  Extracting libvorbis
--->  Configuring libvorbis
--->  Building libvorbis with target all
--->  Staging libvorbis into destroot
--->  Installing libvorbis 1.2.0_0
--->  Activating libvorbis 1.2.0_0
--->  Cleaning libvorbis
--->  Fetching lzo2
--->  Verifying checksum(s) for lzo2
--->  Extracting lzo2
--->  Configuring lzo2
--->  Building lzo2 with target all
--->  Staging lzo2 into destroot
--->  Installing lzo2 2.02_2+darwin_8
--->  Activating lzo2 2.02_2+darwin_8
--->  Cleaning lzo2
--->  Fetching MPlayer
--->  Verifying checksum(s) for MPlayer
--->  Extracting MPlayer
--->  Applying patches to MPlayer
--->  Configuring MPlayer
--->  Building MPlayer with target all
Error: Target org.macports.build returned: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_multimedia_MPlayer/work/MPlayer-1.0rc1" && make all " returned error 2
Command output: vd_mpng.c:60: error: 'buffer' undeclared (first use in this function)
vd_mpng.c: In function 'decode':
vd_mpng.c:66: error: 'png_structp' undeclared (first use in this function)
vd_mpng.c:66: error: parse error before 'png'
vd_mpng.c:67: error: 'png_infop' undeclared (first use in this function)
vd_mpng.c:70: error: 'png_bytep' undeclared (first use in this function)
vd_mpng.c:70: error: 'row_p' undeclared (first use in this function)
vd_mpng.c:71: error: 'png_uint_32' undeclared (first use in this function)
vd_mpng.c:71: error: parse error before 'png_width'
vd_mpng.c:73: error: parse error before 'i'
vd_mpng.c:77: error: 'png_colorp' undeclared (first use in this function)
vd_mpng.c:77: error: parse error before 'pal'
vd_mpng.c:82: error: 'png' undeclared (first use in this function)
vd_mpng.c:82: error: 'PNG_LIBPNG_VER_STRING' undeclared (first use in this function)
vd_mpng.c:83: error: incompatible types in assignment
vd_mpng.c:84: error: 'endinfo' undeclared (first use in this function)
vd_mpng.c:92: error: 'png_width' undeclared (first use in this function)
vd_mpng.c:92: error: 'png_height' undeclared (first use in this function)
vd_mpng.c:95: error: invalid type argument of '->'
vd_mpng.c:96: error: 'PNG_COLOR_TYPE_GRAY_ALPHA' undeclared (first use in this function)
vd_mpng.c:99: error: 'PNG_COLOR_TYPE_GRAY' undeclared (first use in this function)
vd_mpng.c:102: error: 'PNG_COLOR_TYPE_PALETTE' undeclared (first use in this function)
vd_mpng.c:105: error: 'PNG_COLOR_TYPE_RGB_ALPHA' undeclared (first use in this function)
vd_mpng.c:108: error: 'PNG_COLOR_TYPE_RGB' undeclared (first use in this function)
vd_mpng.c:112: error: invalid type argument of '->'
vd_mpng.c:140: error: 'i' undeclared (first use in this function)
vd_mpng.c:145: error: 'pal' undeclared (first use in this function)
vd_mpng.c:146: warning: pointer targets in assignment differ in signedness
make[1]: *** [vd_mpng.o] Error 1
make: *** [libmpcodecs/libmpcodecs.a] Error 2

Error: Status 1 encountered during processing.