问题
Is is possible to put something at the top of the C source file, like
// GCC_OPTIONS=-g,-Wall
that will add those options automatically to gcc every time you compile this file?
回答1:
Yes it is, at least for some flags. You can push and pop diagnostic settings like this:
#pragma GCC diagnostic error "-pedantic"
#pragma GCC diagnostic warning "-Wall"
This is also possible for optimization levels on a per-function level:
#pragma GCC optimize ("string"...)
These #pragma definitions affect all code after them in a source file.
See these other questions for more information:
- Switching off optimization for a specific function in gcc 4.2.2
- Selectively disable GCC warnings for only part of a translation unit?
回答2:
No. Some compiler options have #define equivalents, but not those. This belongs in your make file (or equivalent). With GNU Make:
CFLAGS += -g -Wall
来源：https://stackoverflow.com/questions/3731885/add-gcc-options-to-top-of-c-source-file