$ makepkg -si
==> Determining latest git revision...
  -> Version found: 20111001
==> Making package: xcompmgr_tint2-git 20111001-1 (Sat Oct  1 18:18:34 FET 2011)
==> Checking runtime dependencies...
==> Checking buildtime dependencies...
==> Retrieving Sources...
  -> Found tint2transparency.patch
==> Validating source files with md5sums...
    tint2transparency.patch ... Passed
==> Extracting Sources...
==> Entering fakeroot environment...
==> Starting build()...
==> Connecting to git.freedesktop.org GIT server....
Cloning into xcompmgr...
remote: Counting objects: 310, done.
remote: Compressing objects: 100% (135/135), done.
remote: Total 310 (delta 185), reused 292 (delta 174)
Receiving objects: 100% (310/310), 70.93 KiB | 82 KiB/s, done.
Resolving deltas: 100% (185/185), done.
==> GIT checkout done or server timeout
==> Patching for tint2 real transparency
patching file xcompmgr.c
Hunk #1 succeeded at 2028 (offset 104 lines).
==> Starting make...
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal 
autoreconf: configure.ac: tracing
autoreconf: configure.ac: not using Libtool
autoreconf: running: /usr/bin/autoconf
autoreconf: running: /usr/bin/autoheader
autoreconf: running: automake --add-missing --copy --no-force
configure.ac:19: installing `./config.guess'
configure.ac:19: installing `./config.sub'
configure.ac:12: installing `./install-sh'
configure.ac:12: installing `./missing'
Makefile.am: installing `./depcomp'
autoreconf: Leaving directory `.'
checking for a BSD-compatible install... /bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether to enable maintainer-specific portions of Makefiles... no
checking for style of include used by make... GNU
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking dependency style of gcc... gcc3
checking for gcc option to accept ISO C99... -std=gnu99
checking how to run the C preprocessor... gcc -std=gnu99 -E
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking whether __clang__ is declared... no
checking whether __INTEL_COMPILER is declared... no
checking whether __SUNPRO_C is declared... no
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking build system type... i686-pc-linux-gnu
checking host system type... i686-pc-linux-gnu
checking for a sed that does not truncate output... /bin/sed
checking if gcc -std=gnu99 supports -Werror=attributes... no
checking for XCOMPMGR... yes
configure: creating ./config.status
config.status: creating Makefile
config.status: creating config.h
config.status: executing depfiles commands
make  all-am
make[1]: Entering directory `/tmp/xcompmgr_tint2-git/xcompmgr_tint2-git/src/xcompmgr'
  CC     xcompmgr.o
xcompmgr.c: In function ‘make_gaussian_map’:
xcompmgr.c:397:22: warning: cast from function call of type ‘double’ to non-matching type ‘int’ [-Wbad-function-cast]
xcompmgr.c: In function ‘register_cm’:
xcompmgr.c:2031:5: warning: ISO C90 forbids mixed declarations and code [-Wdeclaration-after-statement]
xcompmgr.c: At top level:
xcompmgr.c:1763:1: warning: ‘shape_kind’ defined but not used [-Wunused-function]
  CCLD   xcompmgr
xcompmgr.o: In function `add_win':
xcompmgr.c:(.text+0x25fa): undefined reference to `XShapeSelectInput'
xcompmgr.o: In function `main':
xcompmgr.c:(.text.startup+0x703): undefined reference to `XShapeQueryExtension'
xcompmgr.c:(.text.startup+0x1b5a): undefined reference to `XShapeSelectInput'
collect2: ld returned 1 exit status
make[1]: *** [xcompmgr] Error 1
make[1]: Leaving directory `/tmp/xcompmgr_tint2-git/xcompmgr_tint2-git/src/xcompmgr'
make: *** [all] Error 2
==> ERROR: A failure occurred in build().
    Aborting...