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Bugs

This code is used since Automake 1.5.

In GCC 3.0, we managed to convince the maintainers to add special command-line options to help Automake more efficiently do its job. We hoped this would let us avoid the use of a wrapper script when Automake's automatic dependency tracking was used with gcc.

Unfortunately, this code doesn't quite do what we want. In particular, it removes the dependency file if the compilation fails; we'd prefer that it instead only touch the file in any way if the compilation succeeds.

Nevertheless, since Automake 1.7, when a recent gcc is detected at configure time, we inline the dependency-generation code and do not use the depcomp wrapper script. This makes compilations faster for those using this compiler (probably our primary user base). The counterpart is that because we have to encode two compilation rules in ‘Makefile’ (with or without depcomp), the produced ‘Makefile’s are larger.


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