使用GCC和自动工具为单个源文件设置编译标志的最佳方法是什么? [英] What is the best way to set compilation flags for individual source files using GCC and autotools?

问题描述

我需要使用自动工具禁用单个文件的优化标志. 最好的方法是什么?

I need to disable optimization flag for a individual file using autotools. What is the best way to do it?

推荐答案

您是指单个源文件还是单个可执行文件?

Do you mean an individual source file or an individual executable?

禁用可执行文件的优化很简单:

To disable optimization for an executable is simple:

bin_PROGRAMS = myprog
myprog_SOURCES = foo.c bar.c
myprog_CFLAGS = -O0

如果您要暂时禁用单个源文件的优化(例如出于调试目的)，则可以在提示符下重新制作该文件:(例如，来自自动制作手册) /p>

If you mean that you want to disable the optimization for a single source file temporarily, say for debugging purposes, you can just remake that file at the prompt: (example from the automake manual)

rm bar.o
make CFLAGS=-O0 bar.o
make

要永久地对单个源文件 进行操作不是那么简单，最好通过创建一个便捷库来实现:

To do it for an individual source file permanently is not so simple, and probably best done by creating a convenience library:

noinst_LIBRARIES = libnoopt.a
libnoopt_a_SOURCES = bar.c
libnoopt_a_CFLAGS = -O0

bin_PROGRAMS = myprog
myprog_SOURCES = foo.c
myprog_CFLAGS = -O2
myprog_LDADD = libnoopt.a

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