purcell/gist:2254314

## gistfile1
Homebrew 0.9
==> Downloading http://www.complang.tuwien.ac.at/schani/metapixel/files/metapixel-1.0.2.tar.gz
Already downloaded: /Users/steve/Library/Caches/Homebrew/metapixel-1.0.2.tar.gz
/usr/bin/tar xf /Users/steve/Library/Caches/Homebrew/metapixel-1.0.2.tar.gz
==> make CC=/usr/bin/clang MACOS_LDOPTS=-L/usr/local/lib MACOS_CCOPTS=-Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include
make CC=/usr/bin/clang MACOS_LDOPTS=-L/usr/local/lib MACOS_CCOPTS=-Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c metapixel.c
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c vector.c
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c zoom.c
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c lispreader.c
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c pools.c
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c allocator.c
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c getopt.c
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c getopt1.c
make -C rwimg
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_PNG -DRWIMG_JPEG -DRWIMG_GIF -g -c readimage.c
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_PNG -DRWIMG_JPEG -DRWIMG_GIF -g -c writeimage.c
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c convert.c
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_PNG -DRWIMG_JPEG -DRWIMG_GIF -g -c rwpng.c
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_PNG -DRWIMG_JPEG -DRWIMG_GIF -g -c rwjpeg.c
rwpng.c:60:29: error: incomplete definition of type 'struct png_struct_def'
    if (setjmp(data->png_ptr->jmpbuf))
               ~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:819:16: note: forward declaration of 'struct png_struct_def'
typedef struct png_struct_def png_struct;
               ^
rwpng.c:67:28: error: incomplete definition of type 'struct png_info_def'
    *width = data->info_ptr->width;
             ~~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:68:29: error: incomplete definition of type 'struct png_info_def'
    *height = data->info_ptr->height;
              ~~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:70:26: error: incomplete definition of type 'struct png_info_def'
    assert(data->info_ptr->bit_depth == 8 || data->info_ptr->bit_depth == 16);
    ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/assert.h:93:25: note: expanded from macro 'assert'
    (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __FILE__, __LINE__, #e) : (void)0)
                        ^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:70:60: error: incomplete definition of type 'struct png_info_def'
    assert(data->info_ptr->bit_depth == 8 || data->info_ptr->bit_depth == 16);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
/usr/include/assert.h:93:25: note: expanded from macro 'assert'
    (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __FILE__, __LINE__, #e) : (void)0)
                        ^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:71:26: error: incomplete definition of type 'struct png_info_def'
    assert(data->info_ptr->color_type == PNG_COLOR_TYPE_RGB || data->info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA);
    ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/assert.h:93:25: note: expanded from macro 'assert'
    (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __FILE__, __LINE__, #e) : (void)0)
                        ^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:71:78: error: incomplete definition of type 'struct png_info_def'
    assert(data->info_ptr->color_type == PNG_COLOR_TYPE_RGB || data->info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA);
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/assert.h:93:25: note: expanded from macro 'assert'
    (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __FILE__, __LINE__, #e) : (void)0)
                        ^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:72:26: error: incomplete definition of type 'struct png_info_def'
    assert(data->info_ptr->interlace_type == PNG_INTERLACE_NONE);
    ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/assert.h:93:25: note: expanded from macro 'assert'
    (__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __FILE__, __LINE__, #e) : (void)0)
                        ^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:87:29: error: incomplete definition of type 'struct png_struct_def'
    if (setjmp(data->png_ptr->jmpbuf))
               ~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:819:16: note: forward declaration of 'struct png_struct_def'
typedef struct png_struct_def png_struct;
               ^
rwpng.c:90:23: error: incomplete definition of type 'struct png_info_def'
    if (data->info_ptr->color_type == PNG_COLOR_TYPE_RGB)
        ~~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:95:23: error: incomplete definition of type 'struct png_info_def'
    if (data->info_ptr->bit_depth == 16)
        ~~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:100:48: error: incomplete definition of type 'struct png_info_def'
    row = (unsigned char*)malloc(data->info_ptr->width * spp * bps);
                                 ~~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:107:32: error: incomplete definition of type 'struct png_info_def'
        for (j = 0; j < data->info_ptr->width; ++j)
                        ~~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:109:27: error: incomplete definition of type 'struct png_info_def'
                lines[i * data->info_ptr->width * 3 + j * 3 + channel] = row[j * spp * bps + channel * bps];
                          ~~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:122:29: error: incomplete definition of type 'struct png_struct_def'
    if (setjmp(data->png_ptr->jmpbuf))
               ~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:819:16: note: forward declaration of 'struct png_struct_def'
typedef struct png_struct_def png_struct;
               ^
rwpng.c:151:29: error: incomplete definition of type 'struct png_struct_def'
    if (setjmp(data->png_ptr->jmpbuf))
               ~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:819:16: note: forward declaration of 'struct png_struct_def'
typedef struct png_struct_def png_struct;
               ^
rwpng.c:159:19: error: incomplete definition of type 'struct png_info_def'
    data->info_ptr->width = width;
    ~~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:160:19: error: incomplete definition of type 'struct png_info_def'
    data->info_ptr->height = height;
    ~~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
rwpng.c:161:19: error: incomplete definition of type 'struct png_info_def'
    data->info_ptr->valid = 0;
    ~~~~~~~~~~~~~~^
/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
typedef struct png_info_def png_info;
               ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
make[1]: *** [rwpng.o] Error 1
make[1]: *** Waiting for unfinished jobs....
/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2   -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c imagesize.c
make: *** [librwimg] Error 2
make: *** Waiting for unfinished jobs....
==> Exit Status: 2
https://github.com/mxcl/master/blob/master/Library/Formula/metapixel.rb#L14
==> Build Environment
CPU: dual-core 64-bit penryn
MacOS: 10.7.3-x86_64
Xcode: 4.3.2
CC: /usr/bin/clang
CXX: /usr/bin/clang++ => /usr/bin/clang
LD: /usr/bin/clang
CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
MAKEFLAGS: -j2
Error: Failed executing: make CC=/usr/bin/clang MACOS_LDOPTS=-L/usr/local/lib MACOS_CCOPTS=-Os\ -w\ -pipe\ -march=native\ -Qunused-arguments\ -I/usr/local/include (metapixel.rb:14)
If `brew doctor' does not help diagnose the issue, please report the bug:
    https://github.com/mxcl/homebrew/wiki/reporting-bugs
	Homebrew 0.9
	==> Downloading http://www.complang.tuwien.ac.at/schani/metapixel/files/metapixel-1.0.2.tar.gz
	Already downloaded: /Users/steve/Library/Caches/Homebrew/metapixel-1.0.2.tar.gz
	/usr/bin/tar xf /Users/steve/Library/Caches/Homebrew/metapixel-1.0.2.tar.gz
	==> make CC=/usr/bin/clang MACOS_LDOPTS=-L/usr/local/lib MACOS_CCOPTS=-Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include
	make CC=/usr/bin/clang MACOS_LDOPTS=-L/usr/local/lib MACOS_CCOPTS=-Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c metapixel.c
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c vector.c
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c zoom.c
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c lispreader.c
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c pools.c
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c allocator.c
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c getopt.c
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c getopt1.c
	make -C rwimg
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_PNG -DRWIMG_JPEG -DRWIMG_GIF -g -c readimage.c
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_PNG -DRWIMG_JPEG -DRWIMG_GIF -g -c writeimage.c
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c convert.c
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_PNG -DRWIMG_JPEG -DRWIMG_GIF -g -c rwpng.c
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_PNG -DRWIMG_JPEG -DRWIMG_GIF -g -c rwjpeg.c
	rwpng.c:60:29: error: incomplete definition of type 'struct png_struct_def'
	if (setjmp(data->png_ptr->jmpbuf))
	~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:819:16: note: forward declaration of 'struct png_struct_def'
	typedef struct png_struct_def png_struct;
	^
	rwpng.c:67:28: error: incomplete definition of type 'struct png_info_def'
	*width = data->info_ptr->width;
	~~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:68:29: error: incomplete definition of type 'struct png_info_def'
	*height = data->info_ptr->height;
	~~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:70:26: error: incomplete definition of type 'struct png_info_def'
	assert(data->info_ptr->bit_depth == 8 \|\| data->info_ptr->bit_depth == 16);
	~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	/usr/include/assert.h:93:25: note: expanded from macro 'assert'
	(__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __FILE__, __LINE__, #e) : (void)0)
	^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:70:60: error: incomplete definition of type 'struct png_info_def'
	assert(data->info_ptr->bit_depth == 8 \|\| data->info_ptr->bit_depth == 16);
	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
	/usr/include/assert.h:93:25: note: expanded from macro 'assert'
	(__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __FILE__, __LINE__, #e) : (void)0)
	^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:71:26: error: incomplete definition of type 'struct png_info_def'
	assert(data->info_ptr->color_type == PNG_COLOR_TYPE_RGB \|\| data->info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA);
	~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	/usr/include/assert.h:93:25: note: expanded from macro 'assert'
	(__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __FILE__, __LINE__, #e) : (void)0)
	^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:71:78: error: incomplete definition of type 'struct png_info_def'
	assert(data->info_ptr->color_type == PNG_COLOR_TYPE_RGB \|\| data->info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA);
	~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	/usr/include/assert.h:93:25: note: expanded from macro 'assert'
	(__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __FILE__, __LINE__, #e) : (void)0)
	^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:72:26: error: incomplete definition of type 'struct png_info_def'
	assert(data->info_ptr->interlace_type == PNG_INTERLACE_NONE);
	~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	/usr/include/assert.h:93:25: note: expanded from macro 'assert'
	(__builtin_expect(!(e), 0) ? __assert_rtn(__func__, __FILE__, __LINE__, #e) : (void)0)
	^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:87:29: error: incomplete definition of type 'struct png_struct_def'
	if (setjmp(data->png_ptr->jmpbuf))
	~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:819:16: note: forward declaration of 'struct png_struct_def'
	typedef struct png_struct_def png_struct;
	^
	rwpng.c:90:23: error: incomplete definition of type 'struct png_info_def'
	if (data->info_ptr->color_type == PNG_COLOR_TYPE_RGB)
	~~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:95:23: error: incomplete definition of type 'struct png_info_def'
	if (data->info_ptr->bit_depth == 16)
	~~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:100:48: error: incomplete definition of type 'struct png_info_def'
	row = (unsigned char)malloc(data->info_ptr->width spp * bps);
	~~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:107:32: error: incomplete definition of type 'struct png_info_def'
	for (j = 0; j < data->info_ptr->width; ++j)
	~~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:109:27: error: incomplete definition of type 'struct png_info_def'
	lines[i * data->info_ptr->width * 3 + j * 3 + channel] = row[j * spp * bps + channel * bps];
	~~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:122:29: error: incomplete definition of type 'struct png_struct_def'
	if (setjmp(data->png_ptr->jmpbuf))
	~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:819:16: note: forward declaration of 'struct png_struct_def'
	typedef struct png_struct_def png_struct;
	^
	rwpng.c:151:29: error: incomplete definition of type 'struct png_struct_def'
	if (setjmp(data->png_ptr->jmpbuf))
	~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:819:16: note: forward declaration of 'struct png_struct_def'
	typedef struct png_struct_def png_struct;
	^
	rwpng.c:159:19: error: incomplete definition of type 'struct png_info_def'
	data->info_ptr->width = width;
	~~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:160:19: error: incomplete definition of type 'struct png_info_def'
	data->info_ptr->height = height;
	~~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	rwpng.c:161:19: error: incomplete definition of type 'struct png_info_def'
	data->info_ptr->valid = 0;
	~~~~~~~~~~~~~~^
	/usr/X11R6/include/png.h:692:16: note: forward declaration of 'struct png_info_def'
	typedef struct png_info_def png_info;
	^
	fatal error: too many errors emitted, stopping now [-ferror-limit=]
	20 errors generated.
	make[1]: *** [rwpng.o] Error 1
	make[1]: *** Waiting for unfinished jobs....
	/usr/bin/clang -Os -w -pipe -march=native -Qunused-arguments -I/usr/local/include -I/usr/X11R6/include -I/usr/X11R6/include/X11 -I. -Irwimg -Wall -O2 -DMETAPIXEL_VERSION=\"1.0.2\" -DRWIMG_JPEG -DRWIMG_PNG -DRWIMG_GIF -c imagesize.c
	make: *** [librwimg] Error 2
	make: *** Waiting for unfinished jobs....
	==> Exit Status: 2
	https://github.com/mxcl/master/blob/master/Library/Formula/metapixel.rb#L14
	==> Build Environment
	CPU: dual-core 64-bit penryn
	MacOS: 10.7.3-x86_64
	Xcode: 4.3.2
	CC: /usr/bin/clang
	CXX: /usr/bin/clang++ => /usr/bin/clang
	LD: /usr/bin/clang
	CFLAGS: -Os -w -pipe -march=native -Qunused-arguments
	CXXFLAGS: -Os -w -pipe -march=native -Qunused-arguments
	MAKEFLAGS: -j2
	Error: Failed executing: make CC=/usr/bin/clang MACOS_LDOPTS=-L/usr/local/lib MACOS_CCOPTS=-Os\ -w\ -pipe\ -march=native\ -Qunused-arguments\ -I/usr/local/include (metapixel.rb:14)
	If `brew doctor' does not help diagnose the issue, please report the bug:
	https://github.com/mxcl/homebrew/wiki/reporting-bugs