This is a semi-automatic report based on the latest archive rebuild results [1].
Apologies if it reaches you in error.
Excerpt from the buildlog:
gcc -DHAVE_CONFIG_H -I. -I../include -DPACKAGE_DATA_DIR=\"/usr/share/pcsx/\" -DPIXMAPDIR=\"/usr/share/pixmaps/\" -DLOCALE_DIR=\"/usr/share/locale/\" -pthread -I/usr/include/gtk-2.0 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -pthread -I/usr/include/libglade-2.0 -I/usr/include/gtk-2.0 -I/usr/include/libxml2 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -I../libpcsxcore -I../include -DPSEMU_DATA_DIR=\"/usr/share/psemu\" -DDEF_PLUGIN_DIR=\"/usr/lib/games/psemu\" -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -c Gtk2Gui.c
Gtk2Gui.c: In function 'SysErrorMessage':
Gtk2Gui.c:920:5: warning: format not a string literal and no format arguments [-Wformat-security]
Gtk2Gui.c: In function 'SysInfoMessage':
Gtk2Gui.c:939:5: warning: format not a string literal and no format arguments [-Wformat-security]
gcc -DHAVE_CONFIG_H -I. -I../include -DPACKAGE_DATA_DIR=\"/usr/share/pcsx/\" -DPIXMAPDIR=\"/usr/share/pixmaps/\" -DLOCALE_DIR=\"/usr/share/locale/\" -pthread -I/usr/include/gtk-2.0 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -pthread -I/usr/include/libglade-2.0 -I/usr/include/gtk-2.0 -I/usr/include/libxml2 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -I../libpcsxcore -I../include -DPSEMU_DATA_DIR=\"/usr/share/psemu\" -DDEF_PLUGIN_DIR=\"/usr/lib/games/psemu\" -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -c MemcardDlg.c
gcc -DHAVE_CONFIG_H -I. -I../include -DPACKAGE_DATA_DIR=\"/usr/share/pcsx/\" -DPIXMAPDIR=\"/usr/share/pixmaps/\" -DLOCALE_DIR=\"/usr/share/locale/\" -pthread -I/usr/include/gtk-2.0 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -pthread -I/usr/include/libglade-2.0 -I/usr/include/gtk-2.0 -I/usr/include/libxml2 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -I../libpcsxcore -I../include -DPSEMU_DATA_DIR=\"/usr/share/psemu\" -DDEF_PLUGIN_DIR=\"/usr/lib/games/psemu\" -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -c ConfDlg.c
gcc -DHAVE_CONFIG_H -I. -I../include -DPACKAGE_DATA_DIR=\"/usr/share/pcsx/\" -DPIXMAPDIR=\"/usr/share/pixmaps/\" -DLOCALE_DIR=\"/usr/share/locale/\" -pthread -I/usr/include/gtk-2.0 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -pthread -I/usr/include/libglade-2.0 -I/usr/include/gtk-2.0 -I/usr/include/libxml2 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -I../libpcsxcore -I../include -DPSEMU_DATA_DIR=\"/usr/share/psemu\" -DDEF_PLUGIN_DIR=\"/usr/lib/games/psemu\" -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -c Cheat.c
gcc -DHAVE_CONFIG_H -I. -I../include -DPACKAGE_DATA_DIR=\"/usr/share/pcsx/\" -DPIXMAPDIR=\"/usr/share/pixmaps/\" -DLOCALE_DIR=\"/usr/share/locale/\" -pthread -I/usr/include/gtk-2.0 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -pthread -I/usr/include/libglade-2.0 -I/usr/include/gtk-2.0 -I/usr/include/libxml2 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -I../libpcsxcore -I../include -DPSEMU_DATA_DIR=\"/usr/share/psemu\" -DDEF_PLUGIN_DIR=\"/usr/lib/games/psemu\" -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -c DebugMemory.c
gcc -DHAVE_CONFIG_H -I. -I../include -DPACKAGE_DATA_DIR=\"/usr/share/pcsx/\" -DPIXMAPDIR=\"/usr/share/pixmaps/\" -DLOCALE_DIR=\"/usr/share/locale/\" -pthread -I/usr/include/gtk-2.0 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -pthread -I/usr/include/libglade-2.0 -I/usr/include/gtk-2.0 -I/usr/include/libxml2 -I/usr/lib/i386-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/i386-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -I../libpcsxcore -I../include -DPSEMU_DATA_DIR=\"/usr/share/psemu\" -DDEF_PLUGIN_DIR=\"/usr/lib/games/psemu\" -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -c AboutDlg.c
/bin/bash ../libtool --tag=CC --mode=link gcc -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -Wl,--as-needed -ldl -lnsl -o pcsx LnxMain.o Plugin.o Config.o Gtk2Gui.o MemcardDlg.o ConfDlg.o Cheat.o DebugMemory.o AboutDlg.o -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0 -lpangocairo-1.0 -lgdk_pixbuf-2.0 -lcairo -lpango-1.0 -lfreetype -lfontconfig -lgobject-2.0 -lglib-2.0 -lglade-2.0 -lgtk-x11-2.0 -lxml2 -lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0 -lpangocairo-1.0 -lgdk_pixbuf-2.0 -lcairo -lpango-1.0 -lfreetype -lfontconfig -lgobject-2.0 -lglib-2.0 -lpthread -lz -lm -lXext -lXtst ../libpcsxcore/libpcsxcore.a
libtool: link: gcc -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -Wl,--as-needed -o pcsx LnxMain.o Plugin.o Config.o Gtk2Gui.o MemcardDlg.o ConfDlg.o Cheat.o DebugMemory.o AboutDlg.o -ldl -lnsl /usr/lib/i386-linux-gnu/libglade-2.0.so -lgtk-x11-2.0 /usr/lib/i386-linux-gnu/libxml2.so -lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0 -lpangocairo-1.0 -lgdk_pixbuf-2.0 /usr/lib/i386-linux-gnu/libcairo.so -lpango-1.0 /usr/lib/i386-linux-gnu/libfreetype.so -lfontconfig -lgobject-2.0 -lglib-2.0 -lpthread -lz -lm -lXext -lXtst ../libpcsxcore/libpcsxcore.a
/usr/bin/ld: ../libpcsxcore/libpcsxcore.a(cdriso.o): undefined reference to symbol 'pthread_create@@GLIBC_2.1'
/usr/bin/ld: note: 'pthread_create@@GLIBC_2.1' is defined in DSO /lib/i386-linux-gnu/libpthread.so.0 so try adding it to the linker command line
/lib/i386-linux-gnu/libpthread.so.0: could not read symbols: Invalid operation
collect2: ld returned 1 exit status
make[2]: *** [pcsx] Error 1
make[2]: Leaving directory `/build/buildd/pcsxr-1.9.92/gui'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/build/buildd/pcsxr-1.9.92'
dh_auto_build: make -j1 returned exit code 2
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20120209-1047
FAILED [dpkg-buildpackage died]
The full buidlog can be found at https://launchpad.net/ubuntu/+archive/test-rebuild-20120201/+build/3165607/+files/buildlog_ubuntu-precise-i386.pcsxr_1.9.92-3build1_FAILEDTOBUILD.txt.gz.
[1] http://people.ubuntuwire.org/~wgrant/rebuild-ftbfs-test/test-rebuild-20120201-precise.html
Confirmed for Quantal