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-rwxr-xr-xscripts/mkroot.sh76
1 files changed, 45 insertions, 31 deletions
diff --git a/scripts/mkroot.sh b/scripts/mkroot.sh
index faf387db..a7338dbe 100755
--- a/scripts/mkroot.sh
+++ b/scripts/mkroot.sh
@@ -1,12 +1,12 @@
#!/bin/bash
# Clear environment variables by restarting script w/bare minimum passed through
-[ -z "$NOCLEAR" ] &&
- exec env -i NOCLEAR=1 HOME="$HOME" PATH="$PATH" LINUX="$LINUX" CROSS="$CROSS"\
- CROSS_COMPILE="$CROSS_COMPILE" CROSS_SHORT="$CROSS_SHORT" "$0" "$@"
+# set ALL= LINUX= CROSS= on command line
+[ -z "$NOCLEAR" ] && exec env -i NOCLEAR=1 HOME="$HOME" PATH="$PATH" \
+ CROSS_COMPILE="$CROSS_COMPILE" "$0" "$@"
die() { echo "$@" >&2; exit 1; }
-announce() { echo -e "\033]2;$CROSS_SHORT $*\007\n=== $*"; }
+announce() { echo -e "\033]2;$CROSS $*\007\n=== $*"; }
getcross() { X="$(echo "$CCC/$1"-*cross/bin/"$1"*-cc)"; echo "${X%cc}"; }
# assign command line NAME=VALUE args to env vars
@@ -16,41 +16,46 @@ while [ $# -ne 0 ]; do
shift
done
+# set up directories (can override most of these paths on cmdline)
+TOP="$PWD/root"
+: ${BUILD:=$TOP/build} ${AIRLOCK:=$TOP/airlock}
+mkdir -p ${LOG:=$TOP/log} || exit 1
+
+# set CROSS_COMPILE from $CROSS using ccc. Handle "all" w/log, list, and err chk
if [ ! -z "$CROSS" ]; then
[ ! -d "${CCC:=$PWD/ccc}" ] && die "No ccc symlink to compiler directory."
- CCCLIST="$(ls "$CCC" | sed -n 's/-.*//p' | sort -u | xargs)"
if [ "$CROSS" == all ]; then
- for i in $CCCLIST; do CROSS_COMPILE="$(getcross $i)" exec "$0" "$@"; done
+ for i in $(ls "$CCC" | sed -n 's/-.*//p' | sort -u | xargs); do
+ { rm -f "$LOG/$i-log".{failed,success}
+ "$0" "$@" CROSS=$i ; [ $((X=$?)) -eq 0 ] && mv "$LOG/$i".{txt,success}
+ } |& tee "$LOG/$i.txt"
+ [ ! -e "$LOG/$i.success" ] &&
+ { mv "$LOG/$i".{txt,failed};[ -z "$ALL" ] && exit 1; }
+ done; exit
elif [ ! -e "${CROSS_COMPILE:=$(getcross $CROSS)}cc" ]; then
- ls "$CCC" | sed -n 's/-.*//p' | sort -u | xargs
- exit 0
+ ls "$CCC" | sed -n 's/-.*//p' | sort -u | xargs; exit
fi
fi
-# If we're cross compiling, set appropriate environment variables.
+# Digest $CROSS_COMPILE (if any) into appropriate environment variables.
if [ -z "$CROSS_COMPILE" ]; then
if ! cc --static -xc - -o /dev/null <<< "int main(void) {return 0;}"; then
- echo "Warning: host compiler can't create static binaries." >&2
- sleep 3
+ echo "Warning: host compiler can't create static binaries." >&2; sleep 3
fi
else
CROSS_PATH="$(dirname "$(which "${CROSS_COMPILE}cc")")"
CROSS_BASE="$(basename "$CROSS_COMPILE")"
- [ -z "$CROSS_SHORT" ] && CROSS_SHORT="${CROSS_BASE/-*/}"
[ -z "$CROSS_PATH" ] && die "no ${CROSS_COMPILE}cc in path"
+ : ${CROSS:=${CROSS_BASE/-*/}}
fi
-echo "Building for ${CROSS_SHORT:=host}"
+echo "Building for ${CROSS:=host}"
-# set up directories (can override most of these paths on cmdline)
-TOP="$PWD/root"
-[ -z "$BUILD" ] && BUILD="$TOP/build"
-[ -z "$AIRLOCK" ] && AIRLOCK="$TOP/airlock"
-[ -z "$OUTPUT" ] && OUTPUT="$TOP/$CROSS_SHORT"
+: ${OUTPUT:=$TOP/$CROSS}
[ -z "$ROOT" ] && ROOT="$OUTPUT/${CROSS_BASE}fs" && rm -rf "$ROOT"
MYBUILD="$BUILD/${CROSS_BASE:-host-}tmp"
rm -rf "$MYBUILD" && mkdir -p "$MYBUILD" || exit 1
-# Stabilize cross compiling by providing known $PATH contents
+# Provide known $PATH contents (airlock) for cross compile builds
if [ ! -z "$CROSS_COMPILE" ]; then
if [ ! -e "$AIRLOCK/toybox" ]; then
announce "airlock"
@@ -84,11 +89,15 @@ fi
if [ $$ -eq 1 ]; then
# Setup networking for QEMU (needs /proc)
+ ifconfig lo 127.0.0.1
ifconfig eth0 10.0.2.15
route add default gw 10.0.2.2
[ "$(date +%s)" -lt 1000 ] && rdate 10.0.2.2 # Ask QEMU what time it is
[ "$(date +%s)" -lt 10000000 ] && ntpd -nq -p north-america.pool.ntp.org
+ # Run expansion scripts (if any)
+ for i in $(/etc/rc/* | sort); do [ -e "$i" ] && . $i; done
+
[ -z "$CONSOLE" ] && CONSOLE="$(</sys/class/tty/console/active)"
[ -z "$HANDOFF" ] && HANDOFF=/bin/sh && echo Type exit when done.
exec /sbin/oneit -c /dev/"${CONSOLE:-console}" $HANDOFF
@@ -111,8 +120,8 @@ echo "nameserver 8.8.8.8" > "$ROOT"/etc/resolv.conf || exit 1
# Build toybox
announce toybox
-make clean
-make $([ -z .config ] && echo defconfig || echo silentoldconfig)
+make clean &&
+make $([ -z .config ] && echo defconfig || echo silentoldconfig) &&
LDFLAGS=--static PREFIX="$ROOT" make toybox install || exit 1
write_miniconfig()
@@ -208,27 +217,32 @@ else
announce "linux-$KARCH"
pushd "$LINUX" && make distclean && popd &&
- cp -sfR "$LINUX" "$MYBUILD/linux" && pushd "$MYBUILD/linux" || exit 1
+ cp -sfR "$LINUX" "$MYBUILD/linux" && pushd "$MYBUILD/linux" &&
write_miniconfig > "$OUTPUT/miniconfig-$TARGET" &&
- make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG="$OUTPUT/miniconfig-$TARGET" &&
- make ARCH=$KARCH CROSS_COMPILE="$CROSS_COMPILE" -j $(nproc) || exit 1
+ make ARCH=$KARCH allnoconfig KCONFIG_ALLCONFIG="$OUTPUT/miniconfig-$TARGET" ||
+ exit 1
+
+ # Remove stupid kernel defaults that shouldn't be on by default
+ # See http://lkml.iu.edu/hypermail/linux/kernel/1912.3/03493.html
+ # And yes, CONFIG_EXPERT forces on CONFIG_DEBUG which adds gratuitous bloat.
+ sed -e 's/# CONFIG_EXPERT .*/CONFIG_EXPERT=y/' \
+ -e "$(sed -E '/^$/d;s@([^,]*)($|,)@/^CONFIG_\1=y/d;$a# CONFIG_\1 is not set/\n@g' <<< VT,SCHED_DEBUG,DEBUG_MISC,X86_DEBUG_FPU)" -i .config &&
+ yes "" | make ARCH=$KARCH oldconfig > /dev/null &&
+
+ make ARCH=$KARCH CROSS_COMPILE="$CROSS_COMPILE" -j $(nproc) &&
+ cp .config "$OUTPUT/linux-fullconfig" || exit 1
# If we have a device tree binary, save it for QEMU.
if [ ! -z "$DTB" ]; then
cp "$DTB" "$OUTPUT/$(basename "$DTB")" || exit 1
fi
- cp "$VMLINUX" "$OUTPUT/$(basename "$VMLINUX")" && cd .. && rm -rf linux &&
- popd || exit 1
+ cp "$VMLINUX" "$OUTPUT" && cd .. && rm -rf linux && popd || exit 1
fi
+# Build any modules, clean up, and package root filesystem for initramfs.
for i in $PKG; do announce "$i"; ./$i; done
-
rmdir "$MYBUILD" "$BUILD" 2>/dev/null
-
-# package root filesystem for initramfs.
-# we do it here so module install can add files (not implemented yet)
announce "${CROSS_BASE}root.cpio.gz"
-
(cd "$ROOT" && find . | cpio -o -H newc | gzip) > \
"$OUTPUT/${CROSS_BASE}root.cpio.gz"