Gcc編譯「無法計算目標文件的後綴：無法編譯」

Question

我實際上正在閱讀LFS書籍（版本7.1），並在第53頁被封鎖。嘗試編譯gcc，我嘗試了以下命令：

./configure --target=$LFS_TGT --prefix=$LFS/build/gcc-build --disable-nls\ 
--disable-shared --disable-multilib --disable-decimal-float --disable-threads\ 
--disable-libmudflap --disable-libssp --disable-libgomp --disable-libquadmath\ 
--disable-target-libiberty --disable-target-zlib\ 
--enable-languages=c\ 
--without-ppl --without-cloog\ 
--with-mpfr-include=$LFS/source/mpfr/src 
--with-mpfr-lib=$LFS/source/mpfr/src/.libs\ 
--with-gmp-include=/mnt/LFS/source/gmp\ 
--with-gmp-lib=/mnt/LFS/source/gmp/.libs\ 
--with-mpc-include=/mnt/LFS/source/mpc/src\ 
--with-mpc-lib=/mnt/LFS/source/mpc/src/.libs 

運行gcc的配置腳本（當然我已經編譯了mpfr，mpc和gmp）。 但是，一旦我推出：

make -j4 

我得到以下錯誤：

checking for suffix of object files... configure: error: in `/mnt/LFS/source/gcc-4.6.2/x86_64-lfs-linux-gnu/libgcc': 
configure: error: cannot compute suffix of object files: cannot compile 
See `config.log' for more details. 
make[1]: *** [configure-target-libgcc] Error 1 

我想谷歌它，並試圖找到我的解決方案，但毫無效果。有誰知道我爲什麼會遇到這個錯誤？

Answer 1

當測試程序試圖鏈接到libmpc/libmpfr/libgmp時，此問題是由dyanmic鏈接庫路徑問題導致的。

追加下面的環境變量，讓LD鏈接對正確所以文件：

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/mpc/lib/ 

，然後再次嘗試建立海灣合作委員會。

Answer 2

「*建築GCC是不平凡的，但如果你遵循謹慎 很多人衝進試圖建立它的指示，而不正確讀取安裝文檔，使這些常見的錯誤之一以上並不困難。

1）不要的./configure從運行gcc的src目錄（這是不支持）=>你需要運行從GCC源目錄之外

2）注意配置：如果GCC動態鏈接的前提條件庫（ GMP/MPFR/MPC），那麼在構建gcc和使用安裝的編譯器時，共享庫必須位於動態鏈接器的路徑（LD_LIBRARY_PATH）中。*「

簡單的例子（不存在動態鏈接到GMP/MPFR/MPC）：

tar xzf gcc-4.8.0.tar.gz 
cd gcc-4.8.0 
./contrib/download_prerequisites 
cd .. 
mkdir objdir 
cd objdir 
$PWD/../gcc-4.8.0/configure --prefix=/opt/gcc-4.8.0 
make 
make install 

來源： Advogato Doc - 可以從許多不同的原因產生 GNU Doc

Answer 3

此錯誤消息。在下面的例子中找出哪一個檢查日誌文件'/home/manu/gcc/gcc/i686-pc-linux-gnu/libgcc/config.log'的最好方法。或者在原始海報案例'/mnt/LFS/source/gcc-4.6.2/x86_64-lfs-linux-gnu/libgcc'中查找最後一個錯誤行。

報價GCC FAQ：http://gcc.gnu.org/wiki/FAQ#configure_suffix

Like any of the GNU projects, GCC is using the GNU autotools to commonly configure the compilation for the specifics of the build system. The configure script thereby uses small test programs - usually called conftest.c - to test if certain functions and/or features are available. If the compilation of such a test program fails, you'll see an error message like:

checking for suffix of object files... configure: error: in 
`/home/manu/gcc/gcc/i686-pc-linux-gnu/libgcc': configure: error: 
cannot compute suffix of object files: cannot compile See `config.log' 
for more details. make[2]: *** [configure-stage1-target-libgcc] Error 
1 make[2]: Leaving directory `/home/manu/gcc/gcc' 

This error message is quite misleading and frequently the problem has nothing to do with the message. You have to check the file 'config.log' in the directory where the error occurred. In the example above, you would have to check the 'config.log' file in the directory '/home/manu/gcc/gcc/i686-pc-linux-gnu/libgcc'. There might be several test programs that failed during the configuration, but some of these failures are non-critical. Check for the last error entry in the file.

Common causes for this error message are:

• Required libraries for the GCC build are missing, specifically MPFR, GMP and MPC. If installed as shared libraries they must be in the runtime linker's search path so they can be found. Please, follow the instructions in the answer to Why does my ./configure and make fail?

• The compiler crashed. For example, if there is an error such as 'conftest.c: internal compiler error:', this indicates a bug in the compiler. If you are using an unmodified version of GCC, please follow the procedure to report the bug.