Ticket #33454: config.err

# ./configure --prefix=/opt/local --enable-vp8 --enable-internal-stats --enable-pic --enable-postproc --enable-multithread --enable-runtime-cpu-detect --disable-install-docs --disable-debug-libs --disable-examples --target=x86_64-darwin11-gcc
Configuring selected codecs
  enabling vp8_encoder
  enabling vp8_decoder
Configuring for target 'x86_64-darwin11-gcc'
  enabling x86_64
  enabling runtime_cpu_detect
  enabling mmx
  enabling sse
  enabling sse2
  enabling sse3
  enabling ssse3
  enabling sse4_1
check_cflags -fomit-frame-pointer
check_cc -fomit-frame-pointer
BEGIN /tmp/vpx-conf-96055-26393.c
    1   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -c -o /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
  using yasm
check_cflags -O3
check_cc -O3
BEGIN /tmp/vpx-conf-96055-26393.c
    1   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -c -o /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
check_cflags -fPIC
check_cc -fPIC
BEGIN /tmp/vpx-conf-96055-26393.c
    1   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -c -o /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
check_cc
BEGIN /tmp/vpx-conf-96055-26393.c
    1       unsigned int e = 'O'<<24 | '2'<<16 | 'B'<<8 | 'E';
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -c -o /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
check_header pthread.h
check_cpp
BEGIN /tmp/vpx-conf-96055-26393.c
    1   #include "pthread.h"
    2   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -E -o /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
/tmp/vpx-conf-96055-26393.c:1:10: fatal error: 'pthread.h' file not found
#include "pthread.h"
         ^
1 error generated.
check_header unistd.h
check_cpp
BEGIN /tmp/vpx-conf-96055-26393.c
    1   #include "unistd.h"
    2   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -E -o /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
/tmp/vpx-conf-96055-26393.c:1:10: fatal error: 'unistd.h' file not found
#include "unistd.h"
         ^
1 error generated.
check_cflags -Wall
check_cc -Wall
BEGIN /tmp/vpx-conf-96055-26393.c
    1   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -Wall -c -o /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
check_cflags -Wdeclaration-after-statement
check_cc -Wdeclaration-after-statement
BEGIN /tmp/vpx-conf-96055-26393.c
    1   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -Wall -Wdeclaration-after-statement -c -o /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
check_cflags -Wdisabled-optimization
check_cc -Wdisabled-optimization
BEGIN /tmp/vpx-conf-96055-26393.c
    1   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -isysroot -mmacosx-version-min=10.7 -m64 -fomit-frame-pointer -arch x86_64 -O3 -fPIC -Wall -Wdeclaration-after-statement -Wdisabled-optimization -c -o /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
check_cflags -Wpointer-arith
check_cc -Wpointer-arith
BEGIN /tmp/vpx-conf-96055-26393.c
    1   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -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 /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
check_cflags -Wtype-limits
check_cc -Wtype-limits
BEGIN /tmp/vpx-conf-96055-26393.c
    1   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -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 /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
check_cflags -Wcast-qual
check_cc -Wcast-qual
BEGIN /tmp/vpx-conf-96055-26393.c
    1   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -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 -Wcast-qual -c -o /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
check_cflags -Wno-unused-function
check_cc -Wno-unused-function
BEGIN /tmp/vpx-conf-96055-26393.c
    1   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -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 -Wcast-qual -Wno-unused-function -c -o /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
  enabling postproc
check_header stdio.h
check_cpp
BEGIN /tmp/vpx-conf-96055-26393.c
    1   #include "stdio.h"
    2   int x;
END /tmp/vpx-conf-96055-26393.c
/usr/bin/clang -O2 -arch x86_64 -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 -Wcast-qual -Wno-unused-function -E -o /tmp/vpx-conf-96055-11349.o /tmp/vpx-conf-96055-26393.c
/tmp/vpx-conf-96055-26393.c:1:10: fatal error: 'stdio.h' file not found
#include "stdio.h"
         ^
1 error generated.