Hi, I was trying to build dash[1] with cgcc and the compilation failed: $ git clone git://git.kernel.org/pub/scm/utils/dash/dash.git $ cd dash/ $ ./autogen $ CC=cgcc ./configure && make This was because an auto-generated file was not created. dash preprocesses a file using gcc[2, line 50] like that: builtins.def: builtins.def.in $(top_builddir)/config.h $(COMPILE) -E -x c -o $@ $< however preprocessing files which does not have a .c extension seems to be unsupported with cgcc. A minimal test example, 'test.c.in': ----------------------------------------------------------------------- #ifdef HAVE_SOMETHING something #endif ----------------------------------------------------------------------- As said, running cgcc -E does not preprocess the file when passed as an argument because it does not end with a .c extension: $ cgcc -DHAVE_SOMETHING -E -x c test.c.in $ Moreover gcc options which have arguments, like "-x <language>" or "-o <file>", seem to be unsupported by sparse: $ cgcc -DHAVE_SOMETHING -E -x c - < test.c.in No such file: c $ Looking at the cgcc code I see that -E disables $do_compile, and in my case $do_check is disabled too because the input file does not end with '.c'. Maybe when -E is passed $do_check should be disabled (don't run sparse if only preprocessing was requested) and $do_compile unconditionally enabled? The issue could be easily fixed in dash by using something like: $ cgcc -DHAVE_SOMETHING -E - < test.c.in > test.c or by calling $(CPP) directly instead of $(COMPILER), however other projects may run into similar issues so maybe fixing cgcc to look a little more like gcc when -E is passed would be better. Thank you, Antonio [1] http://gondor.apana.org.au/~herbert/dash/ [2] https://git.kernel.org/pub/scm/utils/dash/dash.git/tree/src/Makefile.am?id=9000b48966335b0b3d7a3ec1ec8c15b045d59e9d#n50 -- Antonio Ospite https://ao2.it https://twitter.com/ao2it A: Because it messes up the order in which people normally read text. See http://en.wikipedia.org/wiki/Posting_style Q: Why is top-posting such a bad thing?
