2
在我的文件「six.cpp」中，我嘗試打印一個浮點數，但編譯器一直拋出一個錯誤。下面是該文件「six.cpp」：G ++將float看作非法指令
#include <iostream>
#include <iomanip>
using namespace std;
int main(){
double f = 5.3;
cout << f << endl;
return 0;
}
後來，當我嘗試使用g++ six.cpp我得到使用-v標籤下面的輸出進行編譯。
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/lto-wrapper.exe
Target: x86_64-pc-cygwin
Configured with: /cygdrive/i/szsz/tmpp/gcc/gcc-4.9.3-1.x86_64/src/gcc-4.9.3/configure --srcdir=/cygdrive/i/szsz/tmpp/gcc/gcc-4.9.3-1.x86_64/src/gcc-4.9.3 --prefix=/usr --exec-prefix=/usr --localstatedir=/var --sysconfdir=/etc --docdir=/usr/share/doc/gcc --htmldir=/usr/share/doc/gcc/html -C --build=x86_64-pc-cygwin --host=x86_64-pc-cygwin --target=x86_64-pc-cygwin --without-libiconv-prefix --without-libintl-prefix --libexecdir=/usr/lib --enable-shared --enable-shared-libgcc --enable-static --enable-version-specific-runtime-libs --enable-bootstrap --enable-__cxa_atexit --with-dwarf2 --with-tune=generic --enable-languages=ada,c,c++,fortran,lto,objc,obj-c++ --enable-graphite --enable-threads=posix --enable-libatomic --enable-libgomp --disable-libitm --enable-libquadmath --enable-libquadmath-support --enable-libssp --enable-libada --enable-libgcj-sublibs --disable-java-awt --disable-symvers --with-ecj-jar=/usr/share/java/ecj.jar --with-gnu-ld --with-gnu-as --with-cloog-include=/usr/include/cloog-isl --without-libiconv-prefix --without-libintl-prefix --with-system-zlib --enable-linker-build-id
Thread model: posix
gcc version 4.9.3 (GCC)
COLLECT_GCC_OPTIONS='-v' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/cc1plus.exe -quiet -v -Dunix -idirafter /usr/lib/gcc/x86_64-pc-cygwin/4.9.3/../../../../lib/../include/w32api -idirafter /usr/lib/gcc/x86_64-pc-cygwin/4.9.3/../../../../x86_64-pc-cygwin/lib/../lib/../../include/w32api six.cpp -quiet -dumpbase six.cpp -mtune=generic -march=x86-64 -auxbase six -version -o /tmp/ccfHbtlL.s
GNU C++ (GCC) version 4.9.3 (x86_64-pc-cygwin)
compiled by GNU C version 4.9.3, GMP version 6.0.0, MPFR version 3.1.2-p11, MPC version 1.0.3
warning: GMP header version 6.0.0 differs from library version 6.1.0.
warning: MPFR header version 3.1.2-p11 differs from library version 3.1.3.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/../../../../x86_64-pc-cygwin/include"
ignoring duplicate directory "/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/../../../../x86_64-pc-cygwin/lib/../lib/../../include/w32api"
#include "..." search starts here:
#include <...> search starts here:
/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/include/c++
/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/include/c++/x86_64-pc-cygwin
/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/include/c++/backward
/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/include
/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/include-fixed
/usr/include
/usr/lib/gcc/x86_64-pc-cygwin/4.9.3/../../../../lib/../include/w32api
End of search list.
GNU C++ (GCC) version 4.9.3 (x86_64-pc-cygwin)
compiled by GNU C version 4.9.3, GMP version 6.0.0, MPFR version 3.1.2-p11, MPC version 1.0.3
warning: GMP header version 6.0.0 differs from library version 6.1.0.
warning: MPFR header version 3.1.2-p11 differs from library version 3.1.3.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: a7b6fac296390f5db29d753ab65194e7
six.cpp:6:3: internal compiler error: Illegal instruction
double f = 5.3;
^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
我剛剛開始用C++編程，而且我很困惑，爲什麼會發生這種情況。我也做了一些谷歌搜索，並沒有發現任何關於此。
1.爲什麼您的代碼鏈接到GMP和MPFR？ AFAIK，這些是多個精確庫，我看不到你需要它們的地方。 2.顯然，GMP和MPFR的標題與庫不匹配。 3.你似乎遇到* internal *編譯器錯誤。這可能是你的設置有問題。刪除所有內容並正確安裝一個匹配的cygwin。 –
@Rudy：GNU編譯器集合在內部使用這些集合。 –
@BenVoigt：好的，我不知道。感謝您的提醒。 –