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Porting DOS source to GNU C - Backslashes
Posted on 2000-03-30
I am trying to port a DOS program to Linux using the GNU C compiler. I am stuck on the problem of directory slashes. In our source we frequently have includes that are in a subdirectory of the main header directory. For example:
#include <proto\lib\util.h>
Naturally, as the software was developed in the DOS/WIN world, we have used the backslash as our directory separator.
Now, when we try to compile with the GNU C compiler, it complains that it cannot find any of the include files that contain the backslashes (No such file or directory). It can find include files that are in the top-level include directory (and therefore have no backslashes), so it's looking in the right place.
Is there a setting, switch or whatever that will allow GNU see to recognize these backslashes and find the files we are trying to include? I tried usind the DIR_SEPARATOR define, but that didn't seem to help anything.
#include <proto\lib\util.h>
Naturally, as the software was developed in the DOS/WIN world, we have used the backslash as our directory separator.
Now, when we try to compile with the GNU C compiler, it complains that it cannot find any of the include files that contain the backslashes (No such file or directory). It can find include files that are in the top-level include directory (and therefore have no backslashes), so it's looking in the right place.
Is there a setting, switch or whatever that will allow GNU see to recognize these backslashes and find the files we are trying to include? I tried usind the DIR_SEPARATOR define, but that didn't seem to help anything.
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11 Comments
I think all would be well if you change them all to forward slashes. DOS will internally recognize a forward slash as a dir_separator. It's certainly not a legal character for a file name in DOS.
Well, that's a possibility. Ultimately I'm talking about hundreds of files though and I'm trying to avoid a massive and tedious set of changes. Is there any way to make the compiler recognize and honor the backslash?
You could write a script to change all the slashes in the #include directives.
Or you could copy /usr/include/proto/lib/uti
Or you could copy /usr/include/proto/lib/uti
You can create soft links for all include paths in one common directory and include this directory in your compile time options using -I option.
e.g proto\lib\util.h can be a soft link as
proto\\lib\\util.h -> actual path where util.h is stored in linux.
This can give you excellent abstraction to emulate the directoy env on linux machine without changing single line in your code.
May be you can put all this as a install shell script and run it on each new machine before you compile your programs on new machine.
Hope this helps.
e.g proto\lib\util.h can be a soft link as
proto\\lib\\util.h -> actual path where util.h is stored in linux.
This can give you excellent abstraction to emulate the directoy env on linux machine without changing single line in your code.
May be you can put all this as a install shell script and run it on each new machine before you compile your programs on new machine.
Hope this helps.
A suggestions:
In the main program, or some file that all file '#include', add this line:
#define \ /
That will replace all '\' with '/', and won't even screw up any math you might be doing. I'm not sure that all cases are accounted for here, though.
the_bikeman
In the main program, or some file that all file '#include', add this line:
#define \ /
That will replace all '\' with '/', and won't even screw up any math you might be doing. I'm not sure that all cases are accounted for here, though.
the_bikeman
Ufolk and bikeman: I could not get your solution/suggestion to work
ozo/imladris: I ended up writing a perl script to fix the files, so i guess I used a combination of your suggestions. I don't know what's the best way to divide up the points.
Maybe, one of you can post your answer as an answer here and I'll accept it. And then I can open a dummy question so the other can get the points too? Let me know how you want to work it out.
ozo/imladris: I ended up writing a perl script to fix the files, so i guess I used a combination of your suggestions. I don't know what's the best way to divide up the points.
Maybe, one of you can post your answer as an answer here and I'll accept it. And then I can open a dummy question so the other can get the points too? Let me know how you want to work it out.
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