Linux下的C++编程(国外英语资料).docVIP

Linux下的C++编程(国外英语资料) Title: C++ programming under Linux -------------------------------------------------------------------------------- C++ programming under Linux ELF and a.out Under Linux, there are two executable files: ELF and a.out. Its possible that your Linux supports only one, and probably two. Run the command file, and if the command output contains ELF, support ELF, and if Linux/i386 is included, support a.out. GCC version Use the following command to know its version: GCC -v GCC directory structure after installation The /usr/lib/gcc-lib/target/version/ (and subdirectories) compiler is in this directory. /usr/bin/gcc can execute binary programs from the command line in this directory. /usr/target/ (bin|lib|include) / library and header files in this directory. /lib/, /usr/lib, and other directories, libraries of systems under these directories. Symbolic definition Using the -V switch, you can see the symbols defined by the GCC. See the following examples: $echomain ({printf) (Hello world); GCC -E -v -}| Reading specs from /usr/lib/gcc-lib/i486-box-linux/2.7.2/specs GCC version 2.7.2 /usr/lib/gcc-lib/i486-box-linux/2.7.2/cpp -lang-c -v -undef -D__GNUC__=2, -D__GNUC_MINOR__=7, -D__ELF__, -Dunix, -Di386, -Dlinux -D__ELF__, -D__unix__, -D__i386__, -D__linux__, -D__unix, -D__i386 -D__linux, -Asystem (Unix), -Asystem (POSIX), -Acpu (i386) -Amachine (i386) -D__i486__ - GCC compiler usage profile The GCC compiler is usually followed by some options and filenames. The basic uses of the GCC command are as follows: GCC [options] [filenames] Option specifies how the compiler compiles. GCC options GCC has 100 compilation options. Many of these options may never be used, but some of the major options are often encountered. A lot of GCC Options contain more than one character, so you must specify their own hyphen for each option. For example, the following two commands are different: GCC -p -g test.c GCC -pg test.c The first command tells GCC to compile the (profile) i