在Mac OSX 10.8上使用clang和libC++連接GraphicsMagick

Question

在過去的幾天裏，我一直試圖將GraphicsMagick加入到我的項目中，但沒有運氣，希望這裏有人能夠幫助我（最後參見TL/DR如果這太長）。

，因爲我需要JPEG，PNG和lcms支持，我以前下載並使用配置建站，使工具：

./configure CC=clang 
make 
sudo make install 

這一切似乎在下載GraphicsMagick工具後工作正常，所以，我跑配置再次：

CC=clang CXX="clang++ -stdlib=libc++" CXXFLAGS="-stdlib=libc++" LDFLAGS="-stdlib=libc++" ./configure --enable-shared --disable-static --disable-openmp --without-xml --without-zlib --without-bzlib

然後make創建我的動態庫：libGraphicsMagick.3.dylib和libGraphicsMagick++.3.dylib。當我檢查libGraphicsMagick ++與MacDependency或otool，我看到它是連接對/usr/lib/libc++.1.dylib（而不是的libstdC++）

現在，如果我創建使用GraphicsMagick工具一個新的項目，添加#include <Magick++.h>（安裝在上一步驟中的/ usr /本地/包括/ GraphicsMagick工具），這一點，實際上並沒有使用任何功能，我得到一個鏈接錯誤：

clang++ -headerpad_max_install_names -stdlib=libc++ -arch x86_64 -o TestMagickApp.app/Contents/MacOS/TestMagickApp main.o widget.o moc_widget.o -F/Library/Frameworks -L/Library/Frameworks -framework QtGui -framework QtCore 
Undefined symbols for architecture x86_64: 
    "std::__1::basic_streambuf<char, std::__1::char_traits<char> >::gptr() const", referenced from: 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::seekoff(long long, std::__1::ios_base::seekdir, unsigned int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::underflow() in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::pbackfail(int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::overflow(int) in widget.o 
    "std::__1::basic_streambuf<char, std::__1::char_traits<char> >::pptr() const", referenced from: 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::seekoff(long long, std::__1::ios_base::seekdir, unsigned int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::underflow() in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::pbackfail(int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::overflow(int) in widget.o 
    "std::__1::basic_streambuf<char, std::__1::char_traits<char> >::eback() const", referenced from: 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::seekoff(long long, std::__1::ios_base::seekdir, unsigned int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::underflow() in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::pbackfail(int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::overflow(int) in widget.o 
    "std::__1::basic_streambuf<char, std::__1::char_traits<char> >::egptr() const", referenced from: 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::underflow() in widget.o 
    "std::__1::basic_streambuf<char, std::__1::char_traits<char> >::epptr() const", referenced from: 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::seekoff(long long, std::__1::ios_base::seekdir, unsigned int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::overflow(int) in widget.o 
    "std::__1::basic_streambuf<char, std::__1::char_traits<char> >::pbase() const", referenced from: 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::seekoff(long long, std::__1::ios_base::seekdir, unsigned int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::overflow(int) in widget.o 
    "std::__1::basic_iostream<char, std::__1::char_traits<char> >::basic_iostream(std::__1::basic_streambuf<char, std::__1::char_traits<char> >*)", referenced from: 
     std::__1::basic_stringstream<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_stringstream(unsigned int) in widget.o 
    "std::__1::basic_streambuf<char, std::__1::char_traits<char> >::setg(char*, char*, char*)", referenced from: 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::seekoff(long long, std::__1::ios_base::seekdir, unsigned int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::underflow() in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::pbackfail(int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::overflow(int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::str(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in widget.o 
    "std::__1::basic_streambuf<char, std::__1::char_traits<char> >::setp(char*, char*)", referenced from: 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::seekoff(long long, std::__1::ios_base::seekdir, unsigned int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::overflow(int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::str(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in widget.o 
    "std::__1::basic_streambuf<char, std::__1::char_traits<char> >::pbump(int)", referenced from: 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::seekoff(long long, std::__1::ios_base::seekdir, unsigned int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::overflow(int) in widget.o 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::str(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in widget.o 
    "std::__1::basic_streambuf<char, std::__1::char_traits<char> >::sputc(char)", referenced from: 
     std::__1::basic_stringbuf<char, std::__1::char_traits<char>, std::__1::allocator<char> >::overflow(int) in widget.o 
    "std::__1::basic_ios<char, std::__1::char_traits<char> >::basic_ios()", referenced from: 
     std::__1::basic_stringstream<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_stringstream(unsigned int) in widget.o 
ld: symbol(s) not found for architecture x86_64 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 
make: *** [TestMagickApp.app/Contents/MacOS/TestMagickApp] Error 1 
19:43:22: The process "/usr/bin/make" exited with code 2. 
Error while building/deploying project TestMagickApp (kit: 4.8.5) 
When executing step 'Make' 

但是，只有當我嘗試使用的libC++，如果我嘗試發生使用libstdC++來代替它，它沒有任何問題鏈接（但是如果我仍然想直接嘗試使用任何功能，它應該會報錯）。

我試過只包括某些文件，以縮小問題，它似乎是由這一段代碼裏面/usr/local/include/GraphicsMagick/magick/common.h造成的：

/* 
    Support for __attribute__ was added in GCC 2.0. It is not supported 
    in strict ANSI mode which is indicated by __STRICT_ANSI__ being 
    defined. 

    http://www.ohse.de/uwe/articles/gcc-attributes.html 

    Note that GCC 3.2 on MinGW does not define __GNUC__ or __GNUC_MINOR__. 

*/ 
#if !defined(__attribute__) 
# if (!defined(__GNUC__) || (__GNUC__ < 2 || __STRICT_ANSI__)) 
# define __attribute__(x) /*nothing*/ 
# else 
# if (((__GNUC__) > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 1))) /* 3.1+ */ 
#  define MAGICK_FUNC_DEPRECATED __attribute__((__deprecated__)) 
# endif 
# if (__GNUC__ >= 3) /* 3.0+ */ 
#  define MAGICK_FUNC_MALLOC __attribute__((__malloc__)) 
# endif 
# if (((__GNUC__) > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3))) /* 3.3+ */ 
    /* Supports argument syntax like __attribute__((nonnull (1, 2))) but 
    don't know how to support non-GCC fallback. */ 
#  define MAGICK_FUNC_NONNULL __attribute__((__nonnull__)) 
# endif 
# if (((__GNUC__) > 3) || ((__GNUC__ == 2) && (__GNUC_MINOR__ >= 5))) /* 2.5+ */ 
#  define MAGICK_FUNC_NORETURN __attribute__((__noreturn__)) 
# endif 
# if ((__GNUC__) >= 3) /* 2.96+ */ 
#  define MAGICK_FUNC_PURE __attribute__((__pure__)) 
# endif 
# if (((__GNUC__) > 3) || ((__GNUC__ == 2) && (__GNUC_MINOR__ >= 7))) /* 2.7+ */ 
#  define MAGICK_FUNC_UNUSED __attribute__((__unused__)) 
# endif 
# if (((__GNUC__) > 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3))) /* 3.3+ */ 
#  define MAGICK_FUNC_WARN_UNUSED_RESULT __attribute__((__warn_unused_result__)) 
# endif 
# if (((__GNUC__) > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 3))) /* 4.3+ */ 
#  define MAGICK_FUNC_ALLOC_SIZE_1ARG(arg_num) __attribute__((__alloc_size__(arg_num))) 
#  define MAGICK_FUNC_ALLOC_SIZE_2ARG(arg_num1,arg_num2) __attribute__((__alloc_size__(arg_num1,arg_num2))) 
#  define MAGICK_FUNC_HOT __attribute__((__hot__)) 
#  define MAGICK_FUNC_COLD __attribute__((__cold__)) 
#  define MAGICK_OPTIMIZE_FUNC(opt) __attribute__((__optimize__ (opt))) 
# endif 
# if (((__GNUC__) > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 7))) /* 4.7+ */ 
#  define MAGICK_ASSUME_ALIGNED(exp,align) __builtin_assume_aligned(exp,align) 
#  define MAGICK_ASSUME_ALIGNED_OFFSET(exp,align,offset) __builtin_assume_aligned(exp,align,offset) 
# endif 
# endif 
#endif 

現在我真的不明白這個代碼，但它似乎支持真正的舊編譯器（GCC版本< 2 !!）。如果我評論整個部分，它似乎編譯得很好，但由於我不知道它在做什麼，評論它感覺有點冒險/奇怪，因爲它是一個只讀文件，它表明我應該無論如何，我估計不會真的搞亂它。

對於什麼是值得的，使用GraphicsMagick的應用程序也使用Qt 4.8.5，並且我正在使用QtCreator和QMake，但我認爲這不是相關的。我嘗試了Qt 5.1和5.2，但沒有運氣。 （我知道這不是最新版本，但我寧願不改變它）。

TL/DR：

有沒有人有上的libC++編譯GraphicsMagick工具的任何經驗/反饋？

有人可以向我解釋上面的代碼是在做什麼？當我評論它時爲什麼會起作用？

你能發現我做了什麼錯嗎？我做了整個過程幾次，但也許我忘了一些明顯的...

任何幫助將是非常歡迎。

Answer 1

自上一個穩定版本（截至今日1.3.19）以來，clang的配置已被添加。從Mercurial建設解決了這個問題。