patches/gcc/4.1.2/302-c99-snprintf.patch
author |
"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> |
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Sun May 20 13:48:26 2007 +0000 (2007-05-20) |
changeset 112 |
ea15433daba0 |
parent 1 |
eeea35fbf182
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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.
yann@13
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--- gcc-4.1.2.orig/libstdc++-v3/include/c_std/std_cstdio.h 2005-10-30 23:21:50.000000000 +0100
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yann@13
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+++ gcc-4.1.2/libstdc++-v3/include/c_std/std_cstdio.h 2007-03-04 23:33:27.000000000 +0100
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yann@13
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@@ -143,7 +143,7 @@
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yann@1
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using ::vsprintf;
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yann@1
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}
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yann@1
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yann@1
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-#if _GLIBCXX_USE_C99
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yann@1
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+#if _GLIBCXX_USE_C99 || defined(__UCLIBC__)
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yann@1
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yann@1
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#undef snprintf
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yann@1
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#undef vfscanf
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