libvpx compile errors using XCode-4.3

error.txt

# ../configure --prefix=/usr/local/Cellar/libvpx/1.0.0 --enable-pic --enable-vp8 --disable-debug --disable-examples --disable-runtime-cpu-detect
Configuring selected codecs
  enabling vp8_encoder
  enabling vp8_decoder
Configuring for target 'x86_64-darwin11-gcc'
  enabling x86_64
  enabling mmx
  enabling sse
  enabling sse2
  enabling sse3
  enabling ssse3
  enabling sse4_1
check_cflags -fomit-frame-pointer
check_cc -fomit-frame-pointer
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -c -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
  using yasm
check_cflags -O3
check_cc -O3
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -c -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
check_cflags -fPIC
check_cc -fPIC
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -c -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
check_cc
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	    unsigned int e = 'O'<<24 | '2'<<16 | 'B'<<8 | 'E';
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -c -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
check_header pthread.h
check_cpp
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	#include "pthread.h"
    2	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -E -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c:1:21: error: pthread.h: No such file or directory
check_header unistd.h
check_cpp
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	#include "unistd.h"
    2	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -E -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c:1:20: error: unistd.h: No such file or directory
check_cflags -Wall
check_cc -Wall
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -Wall -c -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
check_cflags -Wdeclaration-after-statement
check_cc -Wdeclaration-after-statement
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -Wall -Wdeclaration-after-statement -c -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
check_cflags -Wdisabled-optimization
check_cc -Wdisabled-optimization
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -Wall -Wdeclaration-after-statement -Wdisabled-optimization -c -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
check_cflags -Wpointer-arith
check_cc -Wpointer-arith
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -Wall -Wdeclaration-after-statement -Wdisabled-optimization -Wpointer-arith -c -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
check_cflags -Wtype-limits
check_cc -Wtype-limits
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -Wall -Wdeclaration-after-statement -Wdisabled-optimization -Wpointer-arith -Wtype-limits -c -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
cc1: error: unrecognized command line option "-Wtype-limits"
check_cflags -Wcast-qual
check_cc -Wcast-qual
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -Wall -Wdeclaration-after-statement -Wdisabled-optimization -Wpointer-arith -Wcast-qual -c -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
check_cflags -Wno-unused-function
check_cc -Wno-unused-function
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -Wall -Wdeclaration-after-statement -Wdisabled-optimization -Wpointer-arith -Wcast-qual -Wno-unused-function -c -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
  enabling postproc
check_header stdio.h
check_cpp
BEGIN /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
    1	#include "stdio.h"
    2	int x;
END /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/usr/bin/llvm-gcc -Os -w -pipe -march=core2 -msse4 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -Wall -Wdeclaration-after-statement -Wdisabled-optimization -Wpointer-arith -Wcast-qual -Wno-unused-function -E -o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-25784.o /var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c
/var/folders/02/8j4kgb3s6snglmmgq25h3ypw0000gn/T//vpx-conf-15839-14146.c:1:19: error: stdio.h: No such file or directory