do_build: use an absolute path for O=

for the benefit of the perf build

diff --git a/do_build b/do_build
index 0cb125148fcd4bef5bd141a31923bcb02e7cfc28..84b225cc27dbe80e23aede60c8bf9fb63cc4be96 100755 (executable)
--- a/do_build
+++ b/do_build
@@ -4,6 +4,8 @@
 
 set -e
 
+bparent=$(dirname "$build_dir")
+
 cmd="/bin/sh"
 [ "$build_host" ] &&
        cmd="ssh root@$build_host unshare -n su $(id -u -n)"
@@ -17,14 +19,14 @@ $cmd <<-EOF
 
        cd "$build_dir" || exit 1
 
-       export CCACHE_DIR="${build_dir%/*}/.ccache"
-       export TMPDIR="${build_dir%/*}/tmp"
+       export CCACHE_DIR="$bparent/.ccache"
+       export TMPDIR="$bparent/tmp"
 
        git reset --hard next || exit 1
        touch .scmversion || exit 1
 
        echo Building: x86_64 allmodconfig
-       d=../x86_64_allmodconfig
+       d="$bparent/x86_64_allmodconfig"
        [ -d \$d ] || mkdir \$d || exit 1
        log_x86=\$d.log
        e=\$d.except
@@ -35,7 +37,7 @@ $cmd <<-EOF
        /usr/bin/time cross -n -N -a x86_64 -c $gcc_version O=\$d -j$j_factor -s > \$log_x86 2>&1 &
 
        echo Building: powerpc ppc64_defconfig
-       d=../powerpc_ppc64_defconfig
+       d="$bparent/powerpc_ppc64_defconfig"
        [ -d \$d ] || mkdir \$d || exit 1
        log_ppc=\$d.log
        cross -n -N -a powerpc64 -k powerpc -c $gcc_version O=\$d ppc64_defconfig || exit 1
@@ -43,7 +45,7 @@ $cmd <<-EOF
        /usr/bin/time cross -n -N -a powerpc64 -k powerpc -c $gcc_version O=\$d -j$j_factor -s > \$log_ppc 2>&1 &
 
        echo Building: arm multi_v7_defconfig
-       d=../arm_multi_v7_defconfig
+       d="$bparent/arm_multi_v7_defconfig"
        [ -d \$d ] || mkdir \$d || exit 1
        log_arm=\$d.log
        cross -n -N -a arm -c $gcc_version O=\$d multi_v7_defconfig || exit 1
@@ -51,7 +53,7 @@ $cmd <<-EOF
        /usr/bin/time cross -n -N -a arm -c $gcc_version O=\$d -j$j_factor -s > \$log_arm 2>&1 &
 
        echo Building: perf
-       d=../perf
+       d="$bparent/perf"
        [ -d \$d ] || mkdir \$d || exit 1
        log_perf=\$d.log
        echo "Forking perf build ..."