サーバーのよく使うコマンドメモ| gcc

2016年3月13日

サーバー テクノロジー

Summery

C言語のソースコードをコンパイルして実行ファイルを生成する。

Construction

$gcc [option] [in-file]

Option

-o [file] : 出力ファイルの指定 -O1 : 最適化 -O2 : さらに最適化 -s : 出力ファイルのサイズ縮小 -M : 依存関係の表示 -g : デバッグ情報の表示 -Wall : ワーニングを表示

Sample

## 通常のコンパイル $ gcc hello.c # 実行 ./a.out ## 出力ファイルを変更する $ gcc -o hello hello.c # 実行 ./hello ## 出力ファイルをサイズを小さくする $ gcc -s -o hello hello.c # 実行 ./hello

Discription

Usage: gcc [options] file... Options: -pass-exit-codes Exit with highest error code from a phase --help Display this information --target-help Display target specific command line options --help={target|optimizers|warnings|params|[^]{joined|separate|undocumented}}[,...] Display specific types of command line options (Use '-v --help' to display command line options of sub-processes) --version Display compiler version information -dumpspecs Display all of the built in spec strings -dumpversion Display the version of the compiler -dumpmachine Display the compiler's target processor -print-search-dirs Display the directories in the compiler's search path -print-libgcc-file-name Display the name of the compiler's companion library -print-file-name=<lib> Display the full path to library <lib> -print-prog-name=<prog> Display the full path to compiler component <prog> -print-multi-directory Display the root directory for versions of libgcc -print-multi-lib Display the mapping between command line options and multiple library search directories -print-multi-os-directory Display the relative path to OS libraries -print-sysroot Display the target libraries directory -print-sysroot-headers-suffix Display the sysroot suffix used to find headers -Wa,<options> Pass comma-separated <options> on to the assembler -Wp,<options> Pass comma-separated <options> on to the preprocessor -Wl,<options> Pass comma-separated <options> on to the linker -Xassembler <arg> Pass <arg> on to the assembler -Xpreprocessor <arg> Pass <arg> on to the preprocessor -Xlinker <arg> Pass <arg> on to the linker -combine Pass multiple source files to compiler at once -save-temps Do not delete intermediate files -pipe Use pipes rather than intermediate files -time Time the execution of each subprocess -specs=<file> Override built-in specs with the contents of <file> -std=<standard> Assume that the input sources are for <standard> --sysroot=<directory> Use <directory> as the root directory for headers and libraries -B <directory> Add <directory> to the compiler's search paths -b <machine> Run gcc for target <machine>, if installed -V <version> Run gcc version number <version>, if installed -v Display the programs invoked by the compiler -### Like -v but options quoted and commands not executed -E Preprocess only; do not compile, assemble or link -S Compile only; do not assemble or link -c Compile and assemble, but do not link -o <file> Place the output into <file> -x <language> Specify the language of the following input files Permissible languages include: c c++ assembler none 'none' means revert to the default behavior of guessing the language based on the file's extension Options starting with -g, -f, -m, -O, -W, or --param are automatically passed on to the various sub-processes invoked by gcc. In order to pass other options on to these processes the -W<letter> options must be used. For bug reporting instructions, please see: <http: //bugzilla.redhat.com/bugzilla>.

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