patches/gcc/3.3.1/gcc-3.3.1-trap-posix.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun May 20 13:48:26 2007 +0000 (2007-05-20)
changeset 112 ea15433daba0
permissions -rw-r--r--
Ah! I finally have a progress bar that doesn't stall the build!
- pipe size in Linux is only 8*512=4096 bytes
- pipe size is not setable
- when the feeding process spits out data faster than the eating
process can read it, then the feeding process stalls after 4KiB
of data sent to the pipe
- for us, the progress bar would spawn a sub-shell every line,
and the sub-shell would in turn spawn a 'date' command.
Which was sloooww as hell, and would cause some kind of a
starvation: the pipe was full most of the time, and the
feeding process was stalled all this time.

Now, we use internal variables and a little hack based onan offset
to determine the elapsed time. Much faster this way, but still
CPU-intensive.
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# 
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# Submitted-By: Marc Kleine-Budde <mkl@pengutronix.de>, 2005-04-20
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#
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# Error:
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#
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# creating libintl.h
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# Configuring etc...
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# loading cache ../config.cache
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# checking for a BSD compatible install... (cached) /usr/bin/install -c
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# creating ./config.status
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# creating Makefile
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# trap: usage: trap [-lp] [[arg] signal_spec ...]
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#
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# Description:
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#
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# non-posix conform usage of trap causes bash >= 3.0 to fail
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# e.g.: http://sourceware.org/ml/crossgcc/2004-12/msg00132.html
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#
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# Status:
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#
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# fixed in gcc >= 3.3.5
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# backport of gcc-3.3.5 fix
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#
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diff -ruN gcc-3.3.1-orig/configure gcc-3.3.1/configure
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--- gcc-3.3.1-orig/configure	2002-09-29 18:11:24.000000000 +0200
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+++ gcc-3.3.1/configure	2005-04-20 18:49:20.223220401 +0200
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@@ -697,7 +697,7 @@
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 if test -f skip-this-dir; then
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 	# Perform the same cleanup as the trap handler, minus the "exit 1" of course,
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 	# and reset the trap handler.
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-	trap 0
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+	trap '' 0
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 	rm -rf Makefile* ${tmpdir}
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 	# Execute the final clean-up actions
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 	${config_shell} skip-this-dir
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@@ -1596,7 +1596,7 @@
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 # Perform the same cleanup as the trap handler, minus the "exit 1" of course,
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 # and reset the trap handler.
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 rm -rf ${tmpdir}
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-trap 0
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+trap '' 0
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 exit 0
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