In linux/unix, is there anyway to add the #include line to all *.c or
*.cpp files automatically?

I have a large project which contains thousands of .c or .cpp source
files. However, I decided to #include a common header file into all
source files in order to config them globally. Is there anyway to do
that easily?

RedDevilDan wrote:
> In linux/unix, is there anyway to add the #include line to all *.c or
> *.cpp files automatically?
>
> I have a large project which contains thousands of .c or .cpp source
> files. However, I decided to #include a common header file into all
> source files in order to config them globally. Is there anyway to do
> that easily?
>
Find out a/some header file(s) which are common to those .c/.cpp files.
You could add your #include to those header files.

Saves you the trouble of changing all the .c/.cpp files.

Vino.

On 2006-12-01, RedDevilDan wrote:
> In linux/unix, is there anyway to add the #include line to all *.c or
> *.cpp files automatically?
>
> I have a large project which contains thousands of .c or .cpp source
> files. However, I decided to #include a common header file into all
> source files in order to config them globally. Is there anyway to do
> that easily?

for file in *.c *.cpp
do
if [ -f "$file" ]
then
{
printf "#include <xxx.h>\n#include '\"yyy.h\"\n"
cat "$file"
} > tempfile && cp -- tempfile "$file"
fi
done

--
Chris F.A. Johnson, author <http://cfaj.freeshell.org/shell>
Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
===== My code in this post, if any, assumes the POSIX locale
===== and is released under the GNU General Public Licence

Thinking in c++ Vol 2 has an example in Chapter 4(I don't remember
clearly). You can see the category of this book to find this example
quickly. I'm very sorry I don't remember what section this example lies
in.

Chris F.A. Johnson wrote:
> On 2006-12-01, RedDevilDan wrote:
> > In linux/unix, is there anyway to add the #include line to all *.c or
> > *.cpp files automatically?
> >
> > I have a large project which contains thousands of .c or .cpp source
> > files. However, I decided to #include a common header file into all
> > source files in order to config them globally. Is there anyway to do
> > that easily?
>
> for file in *.c *.cpp
> do
> if [ -f "$file" ]
> then
> {
> printf "#include <xxx.h>\n#include '\"yyy.h\"\n"
> cat "$file"
> } > tempfile && cp -- tempfile "$file"
> fi
> done
>
> --
> Chris F.A. Johnson, author <http://cfaj.freeshell.org/shell>
> Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
> ===== My code in this post, if any, assumes the POSIX locale
> ===== and is released under the GNU General Public Licence

On Thu, 30 Nov 2006 22:35:40 -0800, RedDevilDan wrote:

> In linux/unix, is there anyway to add the #include line to all *.c or
> *.cpp files automatically?
>
> I have a large project which contains thousands of .c or .cpp source
> files. However, I decided to #include a common header file into all
> source files in order to config them globally. Is there anyway to do
> that easily?

Usually this is a bad idea, it tends to increase coupling between
different parts of the program.

Chris has already give you a loop that will do what you want, however if
you are using gcc then at least the current version has an option
'-include' which you could add to your build system. To quote the manual

-include file
Process file as if "#include "file"" appeared as the first line of
the primary source file. However, the first directory searched for
file is the preprocessor's working directory instead of the directory
containing the main source file. If not found there, it is searched
for in the remainder of the "#include "..."" search chain as normal.

If multiple -include options are given, the files are included in the
order they appear on the command line.