Output of `brew install -v pkg-config`

gistfile1.txt

==> Downloading http://pkgconfig.freedesktop.org/releases/pkg-config-0.27.tar.gz
Already downloaded: /Users/kenn/Library/Caches/Homebrew/pkg-config-0.27.tar.gz
/usr/bin/tar xf /Users/kenn/Library/Caches/Homebrew/pkg-config-0.27.tar.gz
==> ./configure --disable-debug --prefix=/usr/local/Cellar/pkg-config/0.27 --with-pc-path=/usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr/lib/pkgconfig --with-internal-glib
./configure --disable-debug --prefix=/usr/local/Cellar/pkg-config/0.27 --with-pc-path=/usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr/lib/pkgconfig --with-internal-glib
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... ./install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... yes
checking build system type... x86_64-apple-darwin11.4.0
checking host system type... x86_64-apple-darwin11.4.0
checking how to print strings... printf
checking for style of include used by make... GNU
checking for gcc... /usr/bin/clang
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 /usr/bin/clang accepts -g... yes
checking for /usr/bin/clang option to accept ISO C89... none needed
checking dependency style of /usr/bin/clang... gcc3
checking for a sed that does not truncate output... /usr/bin/sed
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for fgrep... /usr/bin/grep -F
checking for ld used by /usr/bin/clang... /usr/bin/clang
checking if the linker (/usr/bin/clang) is GNU ld... no
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm
checking the name lister (/usr/bin/nm) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 196608
checking whether the shell understands some XSI constructs... yes
checking whether the shell understands "+="... yes
checking how to convert x86_64-apple-darwin11.4.0 file names to x86_64-apple-darwin11.4.0 format... func_convert_file_noop
checking how to convert x86_64-apple-darwin11.4.0 file names to toolchain format... func_convert_file_noop
checking for /usr/bin/clang option to reload object files... -r
checking for objdump... no
checking how to recognize dependent libraries... pass_all
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for ar... ar
checking for archiver @FILE support... no
checking for strip... strip
checking for ranlib... ranlib
checking command to parse /usr/bin/nm output from /usr/bin/clang object... ok
checking for sysroot... no
checking for mt... no
checking if : is a manifest tool... no
checking for dsymutil... dsymutil
checking for nmedit... nmedit
checking for lipo... lipo
checking for otool... otool
checking for otool64... no
checking for -single_module linker flag... yes
checking for -exported_symbols_list linker flag... yes
checking for -force_load linker flag... yes
checking how to run the C preprocessor... /usr/bin/clang -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 for dlfcn.h... yes
checking for objdir... .libs
checking if /usr/bin/clang supports -fno-rtti -fno-exceptions... yes
checking for /usr/bin/clang option to produce PIC... -fno-common -DPIC
checking if /usr/bin/clang PIC flag -fno-common -DPIC works... yes
checking if /usr/bin/clang static flag -static works... no
checking if /usr/bin/clang supports -c -o file.o... yes
checking if /usr/bin/clang supports -c -o file.o... (cached) yes
checking whether the /usr/bin/clang linker (/usr/bin/clang) supports shared libraries... yes
checking dynamic linker characteristics... darwin11.4.0 dyld
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking for gcc... (cached) /usr/bin/clang
checking whether we are using the GNU C compiler... (cached) yes
checking whether /usr/bin/clang accepts -g... (cached) yes
checking for /usr/bin/clang option to accept ISO C89... (cached) none needed
checking dependency style of /usr/bin/clang... (cached) gcc3
checking dirent.h usability... yes
checking dirent.h presence... yes
checking for dirent.h... yes
checking for unistd.h... (cached) yes
checking sys/wait.h usability... yes
checking sys/wait.h presence... yes
checking for sys/wait.h... yes
checking malloc.h usability... no
checking malloc.h presence... no
checking for malloc.h... no
checking for default search path for .pc files... /usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr/lib/pkgconfig
checking for system include path to avoid -I flags... /usr/include
checking for system library path to avoid -L flags... /usr/lib
configure: creating ./config.lt
config.lt: creating libtool
checking whether to list both direct and indirect dependencies... no
checking for Win32... no
checking if internal glib should be used... yes
configure: creating ./config.status
config.status: creating Makefile
config.status: creating check/Makefile
config.status: creating check/config.sh
config.status: creating config.h
config.status: executing depfiles commands
config.status: executing libtool commands
=== configuring in glib (/private/tmp/homebrew-pkg-config-0.27-v7Wp/pkg-config-0.27/glib)
configure: running /bin/sh ./configure --disable-option-checking '--prefix=/usr/local/Cellar/pkg-config/0.27'  '--disable-debug' '--with-pc-path=/usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr/lib/pkgconfig' '--with-internal-glib' 'CC=/usr/bin/clang' 'CFLAGS=-Os -w -pipe -march=native -Qunused-arguments -mmacosx-version-min=10.7' 'LDFLAGS=-L/usr/local/Cellar/gettext/0.18.1.1/lib -L/usr/local/lib' 'CPPFLAGS=-I/usr/local/Cellar/gettext/0.18.1.1/include -isystem /usr/local/include' --cache-file=/dev/null --srcdir=.
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... ./install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... yes
checking how to create a ustar tar archive... gnutar
checking whether to disable maintainer-specific portions of Makefiles... yes
checking for gcc... /usr/bin/clang
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 /usr/bin/clang accepts -g... yes
checking for /usr/bin/clang option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of /usr/bin/clang... gcc3
checking how to run the C preprocessor... /usr/bin/clang -E
checking build system type... x86_64-apple-darwin11.4.0
checking host system type... x86_64-apple-darwin11.4.0
checking for the BeOS... no
checking for Win32... no
checking for Mac OS X Carbon support... yes
checking for Mac OS X Cocoa support... yes
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking whether we are using the GNU C Library 2.1 or newer... no
checking whether to enable garbage collector friendliness... no
checking whether to disable memory pools... no
checking whether we are using the GNU C++ compiler... yes
checking whether /usr/bin/clang++ accepts -g... yes
checking dependency style of /usr/bin/clang++... gcc3
checking for gcc... (cached) /usr/bin/clang
checking whether we are using the GNU C compiler... (cached) yes
checking whether /usr/bin/clang accepts -g... (cached) yes
checking for /usr/bin/clang option to accept ISO C89... (cached) none needed
checking dependency style of /usr/bin/clang... (cached) gcc3
checking whether /usr/bin/clang and cc understand -c and -o together... yes
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking for gawk... (cached) awk
checking for perl5... no
checking for perl... perl
checking for indent... indent
checking for perl... /usr/bin/perl
checking for a Python interpreter with version >= 2.5... python
checking for python... /usr/local/bin/python
checking for python version... 2.7
checking for python platform... darwin
checking for python script directory... ${prefix}/lib/python2.7/site-packages
checking for python extension module directory... ${exec_prefix}/lib/python2.7/site-packages
checking for iconv_open... no
checking for libiconv_open in -liconv... no
checking for iconv_open in -liconv... yes
checking whether to cache iconv descriptors... yes
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 locale.h usability... yes
checking locale.h presence... yes
checking for locale.h... yes
checking for LC_MESSAGES... yes
checking libintl.h usability... yes
checking libintl.h presence... yes
checking for libintl.h... yes
checking for ngettext in libc... no
checking for bindtextdomain in -lintl... no
checking if -liconv is needed to use gettext... 
checking for ngettext in -lintl... no
==> Exit Status: 1
https://github.com/mxcl/master/blob/master/Library/Formula/pkg-config.rb#L18
==> Build Environment
HOMEBREW_VERSION: 0.9.2
HEAD: 4fa691262c643c61e6659f9cbc346320fa678e23
CPU: dual-core 64-bit penryn
OS X: 10.7.4-x86_64
Xcode: 4.4
CLT: 1.0.0.9000000000.1.1249367152
X11: XQuartz 2.6.4 in /usr/X11
CC: /usr/bin/clang
CXX: /usr/bin/clang++ => /usr/bin/clang
LD: /usr/bin/clang
CFLAGS: -Os -w -pipe -march=native -Qunused-arguments -mmacosx-version-min=10.7
CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments -mmacosx-version-min=10.7
CPPFLAGS: -I/usr/local/Cellar/gettext/0.18.1.1/include -isystem /usr/local/include
LDFLAGS: -L/usr/local/Cellar/gettext/0.18.1.1/lib -L/usr/local/lib
MAKEFLAGS: -j2
MACOSX_DEPLOYMENT_TARGET: 10.7
ACLOCAL_PATH: /usr/local/Cellar/gettext/0.18.1.1/share/aclocal
OBJC: /usr/bin/clang
PATH: /usr/local/Cellar/gettext/0.18.1.1/bin:/usr/local/share/python:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/usr/local/git/bin:/Users/kenn/.rvm/bin:/usr/local/Library/Contributions/cmds
Error: Failed executing: ./configure --disable-debug --prefix=/usr/local/Cellar/pkg-config/0.27 --with-pc-path=/usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr/lib/pkgconfig --with-internal-glib (pkg-config.rb:18)
These existing issues may help you:
    https://github.com/mxcl/homebrew/issues/14074
Otherwise, this may help you fix or report the issue:
    https://github.com/mxcl/homebrew/wiki/bug-fixing-checklist
We saved the configure log:
    ~/Library/Logs/Homebrew/config.log
When you report the issue please paste the config.log here:
    http://gist.github.com/