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scripts/build/debug.sh
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun May 20 13:48:26 2007 +0000 (2007-05-20)
changeset 112 ea15433daba0
child 182 223c84ec2d90
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. 
     1 # Wrapper to build the debug facilities

     2 

     3 # List all debug facilities, and parse their scripts

     4 CT_DEBUG_FACILITY_LIST=

     5 for f in "${CT_TOP_DIR}/scripts/build/debug/"*.sh; do

     6     is_enabled=

     7     . "${f}"

     8     f=`basename "${f}" .sh`

     9     if [ "${is_enabled}" = "y" ]; then

    10         CT_DEBUG_FACILITY_LIST="${CT_DEBUG_FACILITY_LIST} ${f}"

    11     fi

    12 done

    13 

    14 # Download the debug facilities

    15 do_debug_get() {

    16     for f in ${CT_DEBUG_FACILITY_LIST}; do

    17         do_debug_${f}_get

    18     done

    19 }

    20 

    21 # Extract and patch the debug facilities

    22 do_debug_extract() {

    23     for f in ${CT_DEBUG_FACILITY_LIST}; do

    24         do_debug_${f}_extract

    25     done

    26 }

    27 

    28 # Build the debug facilities

    29 do_debug() {

    30     for f in ${CT_DEBUG_FACILITY_LIST}; do

    31         do_debug_${f}_build

    32     done

    33 }

    34
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