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authorRobert Yang <liezhi.yang@windriver.com>2019-01-08 17:42:52 +0800
committerRobert Yang <liezhi.yang@windriver.com>2019-01-09 19:31:19 -0800
commit625dc853b0c953a4e066d9088796886f6d0b5103 (patch)
treebf32b34eba74936eb9de087842d7a9217179f157 /meta/conf
parent237ed166f48b0e32684a5307d3b47b9485238ed9 (diff)
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glibc-site_2.28.bb: Add it for speeding up do_configure
* How to generate site_config/funcs: - Do a world build and save autoconf cache values to a directory such as /tmp/saved_ac_cv: 1) Add the following line to local.conf MACHINE="qemux86" EXTRA_OECONF_append = " --cache-file=/tmp/saved_ac_cv/${TARGET_ARCH}/${PN}-cache" 2) Do a world build $ bitbake world 3) Find out the top 100 used functions, these functions are used by about more than 20 recipes in a world build. $ find /tmp/i586/ /tmp/qemux86/ -name '*_cache_config' -exec cat {} \; | \ grep '^ac_cv_func_' | awk -F= '{print $1}' | sed 's/^ac_cv_func_//' | \ sort | uniq -c | sort -n | awk '{print $2}' | tail -n 100 | sort -o /tmp/target_funcs - Find out glibc functions $ grep '^ ' /path/to/2.28-r0/build-i586-poky-linux/libc.map | sed -e 's/;/\n/g' | \ sed -e 's/^ *//g' -e '/^$/d' | sort -o /tmp/libc.map - Get the common funcs in both /tmp/libc.map and /tmp/target_funcs $ comm -1 -2 /tmp/libc.map /tmp/target_funcs > site_config/funcs * How to generate site_config/headers: - Find out the top 100 used headers, these functions are used by about more than 20 recipes in a world build. $ find /tmp/i586/ /tmp/qemux86/ -name '*_cache_config' -exec cat {} \; | \ grep '^ac_cv_header_' | awk -F= '{print $1}' | sed 's/^ac_cv_header_//' | \ sort | uniq -c | sort -n | awk '{print $2}' | tail -n 100 | sort -o /tmp/target_headers - Find out glibc headers $ find tmp/work/i586-poky-linux/glibc/2.28-r0/git/include/ -name '*.h' | \ sed -e 's#.*git/include/##' | sort -o /tmp/libc_headers_orig $ cat /tmp/libc_headers_orig | sed -e 's#.*git/include/##' -e 's#/#_#g' -e 's#\.#_#g' | sort -o /tmp/libc_headers $ comm -1 -2 /tmp/target_headers /tmp/libc_headers > /tmp/tr_headers $ for i in `cat /tmp/libc_headers_orig`; do i_tr=`echo $i | sed -e 's#.*git/include/##' -e 's#/#_#g' -e 's#\.#_#g'` if grep -q -E "^$i_tr$" /tmp/tr_headers; then echo $i fi done > site_config/headers Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
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