detect unbound variables in scripts

boot/createimg-aarch64.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -e
+set -eu
 
 parent_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
 cd "$parent_path"

boot/createimg-x86_32.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -e
+set -eu
 
 parent_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
 cd "$parent_path"

boot/createimg-x86_64.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -e
+set -eu
 
 parent_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
 cd "$parent_path"

kernel/arch/aarch64/archlink.sh

@@ -1,4 +1,4 @@
 #!/usr/bin/env bash
-set -e
+set -eu
 
 ${INT_LD} ${INT_LDFLAGS} -T arch/aarch64/linker.ld kernel_partial.o -o kernel.o

kernel/arch/m68k/archlink.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -e
+set -eu
 
 source .config
 

kernel/arch/x86/archlink.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -e
+set -eu
 
 source .config
 

kernel/arch/xtensa/archlink.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -e
+set -eu
 
 ${INT_LD} ${INT_LDFLAGS} -T arch/xtensa/linker.ld kernel_partial.o -o kernel.o
 ${INT_NM} --format=bsd -n kernel.o | python3 scripts/gensyms.py .long > symtab.S