1 files changed, 73 insertions, 0 deletions

diff --git a/make_single_applets.sh b/make_single_applets.sh
new file mode 100755
index 000000000..00f502eda
--- /dev/null
+++ b/make_single_applets.sh
@@ -0,0 +1,73 @@
+#!/bin/sh
+# This script expects that the tree was built with the desired .config:
+# in particular, it expects that include/applets.h is generated already.
+#
+# The script will try to rebuild each enabled applet in isolation.
+# All other options which chose general bbox config, applet features, etc,
+# are not modified for the builds.
+
+makeopts="-j9"
+
+# The list of all applet config symbols
+test -f include/applets.h || { echo "No include/applets.h file"; exit 1; }
+apps="`
+grep ^IF_ include/applets.h \
+| grep -v ^IF_FEATURE_ \
+| sed 's/IF_\([A-Z0-9._-]*\)(.*/\1/' \
+| sort | uniq
+`"
+
+# Take existing config
+test -f .config || { echo "No .config file"; exit 1; }
+cfg="`cat .config`"
+
+# Make a config with all applet symbols off
+allno="$cfg"
+for app in $apps; do
+        allno="`echo "$allno" | sed "s/^CONFIG_${app}=y\$/# CONFIG_${app} is not set/"`"
+done
+#echo "$allno" >.config_allno
+
+# Turn on each applet individually and build single-applet executable
+fail=0
+for app in $apps; do
+        # Only if it was indeed originally enabled...
+        { echo "$cfg" | grep -q "^CONFIG_${app}=y\$"; } || continue
+
+        echo "Making ${app}..."
+        mv .config .config.SV
+        echo "CONFIG_${app}=y" >.config
+        echo "$allno" | sed "/^# CONFIG_${app} is not set\$/d" >>.config
+
+        if test x"${app}" != x"SH_IS_ASH" && test x"${app}" != x"SH_IS_HUSH"; then
+                # $allno has all choices for "sh" aliasing set to off.
+                # "sh" aliasing defaults to "ash", not none.
+                # without this fix, "make oldconfig" sets it wrong,
+                # resulting in NUM_APPLETS = 2 (the second applet is "sh")
+                sed '/CONFIG_SH_IS_NONE/d' -i .config
+                echo "CONFIG_SH_IS_NONE=y" >>.config
+        fi
+
+        if ! yes '' | make oldconfig >busybox_make_${app}.log 2>&1; then
+                : $((fail++))
+                echo "Config error for ${app}"
+                mv .config busybox_config_${app}
+        elif ! make $makeopts >>busybox_make_${app}.log 2>&1; then
+                : $((fail++))
+                echo "Build error for ${app}"
+                mv .config busybox_config_${app}
+        elif ! grep -q '^#define NUM_APPLETS 1$' include/NUM_APPLETS.h; then
+                mv busybox busybox_${app}
+                : $((fail++))
+                echo "NUM_APPLETS != 1 for ${app}: `cat include/NUM_APPLETS.h`"
+                mv .config busybox_config_${app}
+        else
+                mv busybox busybox_${app}
+                rm busybox_make_${app}.log
+        fi
+        mv .config.SV .config
+        #exit
+done
+touch .config # or else next "make" can be confused
+echo "Failures: $fail"
+test $fail = 0 # set exitcode