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I have huge directory with makefiles, .c, .h .cpp etc. The final output (binary) is built using make.

To do that I have to find and investigate the source files that use <aio.h> and <execinfo.h> headers. So how do I find the files that use #include <aio.h> and #include <execinfo.h>

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    Grep or a grep-like. Commented Jan 2, 2019 at 22:11
  • 2
    If you need to auto-generate build dependencies you should probably have a look at this. Commented Jan 2, 2019 at 22:22
  • Sounds like you're looking for mkdep Commented Jan 2, 2019 at 23:20
  • Possible duplicate of Identify which file has included some particular header file Commented Jan 4, 2019 at 3:34

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For browsing big code, cscope or ctags is used. Both needs to generate database. For cscope it can be done by command cscope -b-q -k and later cscope-d will give console menu for search options. Find or grep will be slow for browsing of big code.

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find . -name '*.c (or*.h)' -exec grep "thing_to_Search_for" '{}' \; -print

This command helped me achieve the results I needed.

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