Subject: 23.3.50; Use GNU, not Windows syntax in example code in flymake manual

From: Reuben Thomas <[email-masked]>
Date: Sat, 21 May 2011 23:20:46 +0100

The flymake manual contains the following handy sample make rule:

check-syntax:
	gcc -o nul -S ${CHK_SOURCES}

But using “nul” is useful on Windows (it works on GNU too, but creates
an output file, and the point of the rule is to avoid doing that).
Hence, use the GNU syntax:

check-syntax:
	gcc -o /dev/null -S ${CHK_SOURCES}

A further suggestion is to suggest the following rule for automake users:

check-syntax:
	$(COMPILE) -o /dev/null -S $(CHK_SOURCES)

As this adds compiler flags which may be needed, for example to find
include files. A further reason this is handy is that the undocumented
make target dumpvars which is used by
flymake-get-project-include-dirs-imp cannot easily be implemented in
automake (at least, my attempt ended in tears, since it required the use
of a GNU make construct, which is not permitted in automake). The above
check-syntax target makes this unnecessary.

In GNU Emacs 23.3.50.1 (i686-pc-linux-gnu, GTK+ Version 2.24.4)
 of 2011-04-24 on canta
Windowing system distributor `The X.Org Foundation', version 11.0.11001000
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C-n C-n M-w M-x r e e p o r t - <backspace> <backspace> 
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