From c0e56edaf256adb6c60c5a052525a1ffbb927901 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Mon, 8 Oct 2012 00:02:30 -0500
Subject: New build infrastructure to generate FLAG_ macros and TT alias,
 #define FOR_commandname before #including toys.h to trigger it. Rename
 DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was
 DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and
 replace optflag constants with FLAG_ macros where appropriate.

---
 scripts/make.sh | 85 +++++++++++++++++++++++++++------------------------------
 1 file changed, 40 insertions(+), 45 deletions(-)

(limited to 'scripts')

diff --git a/scripts/make.sh b/scripts/make.sh
index af56e6d1..6c1672e3 100755
--- a/scripts/make.sh
+++ b/scripts/make.sh
@@ -10,6 +10,33 @@ then
   exit 1
 fi
 
+echo "Make generated/config.h from .config."
+
+# This long and roundabout sed invocation is to make old versions of sed happy.
+# New ones have '\n' so can replace one line with two without all the branches
+# and tedious mucking about with hold space.
+
+sed -n \
+  -e 's/^# CONFIG_\(.*\) is not set.*/\1/' \
+  -e 't notset' \
+  -e 's/^CONFIG_\(.*\)=y.*/\1/' \
+  -e 't isset' \
+  -e 's/^CONFIG_\([^=]*\)=\(.*\)/#define CFG_\1 \2/p' \
+  -e 'd' \
+  -e ':notset' \
+  -e 'h' \
+  -e 's/.*/#define CFG_& 0/p' \
+  -e 'g' \
+  -e 's/.*/#define USE_&(...)/p' \
+  -e 'd' \
+  -e ':isset' \
+  -e 'h' \
+  -e 's/.*/#define CFG_& 1/p' \
+  -e 'g' \
+  -e 's/.*/#define USE_&(...) __VA_ARGS__/p' \
+  .config > generated/config.h || exit 1
+
+
 echo "Extract configuration information from toys/*.c files..."
 scripts/genconfig.sh
 
@@ -22,47 +49,41 @@ echo "Generate headers from toys/*/*.c..."
 
 echo "generated/newtoys.h"
 
-function newtoys()
-{
-  for i in toys/*/*.c
-  do
-    sed -n -e '1,/^config [A-Z]/s/^USE_/&/p' $i || exit 1
-  done
-}
 echo "NEWTOY(toybox, NULL, TOYFLAG_STAYROOT)" > generated/newtoys.h
-newtoys | sed 's/\(.*TOY(\)\([^,]*\),\(.*\)/\2 \1\2,\3/' | sort -k 1,1 \
+sed -n -e 's/^USE_[A-Z0-9_]*(/&/p' toys/*/*.c \
+	| sed 's/\(.*TOY(\)\([^,]*\),\(.*\)/\2 \1\2,\3/' | sort -k 1,1 \
 	| sed 's/[^ ]* //'  >> generated/newtoys.h
 
 # Extract global structure definitions and flag definitions from toys/*/*.c
 
 function getglobals()
 {
+  NEWTOYS="$(cat generated/config.h generated/newtoys.h | gcc -E - | sed 's/" *"//g')"
   for i in toys/*/*.c
   do
     NAME="$(echo $i | sed 's@.*/\(.*\)\.c@\1@')"
 
     echo -e "// $i\n"
-    sed -n -e '/^DEFINE_GLOBALS(/,/^)/b got;b;:got' \
-        -e 's/^DEFINE_GLOBALS(/struct '"$NAME"'_data {/' \
+    sed -n -e '/^GLOBALS(/,/^)/b got;b;:got' \
+        -e 's/^GLOBALS(/struct '"$NAME"'_data {/' \
         -e 's/^)/};/' -e 'p' $i
 
     # And get flag definitions
-    FLAGS="$(sed -n \
+    FLAGS="$(echo "$NEWTOYS" | sed -n \
                  -e "s/.*TOY($NAME"',[ \t]*"\([^"]*\)"[ \t]*,.*)/\1/' \
-                 -e 't keep;d;:keep' \
-                 -e 's/[><=][0-9][0-9]*//g' \
-                 -e 's/+.//g' \
-                 -e 's/([^)]*)//g' \
-                 -e 's/[-?^:&#|@*]//g' \
-                 -e 'p' \
-                 generated/newtoys.h)"
+                 -e 't keep;d;:keep' -e 's/^[<>=][0-9]//' -e 's/[?&^]//' \
+                 -e 't keep' -e 's/[><=][0-9][0-9]*//g' -e 's/+.//g' \
+                 -e 's/([^)]*)//g' -e 's/[-?^:&#|@*]//g' -e 'p')"
+    echo "#ifdef FOR_${NAME}"
     X=0
     while [ $X -lt ${#FLAGS} ]
     do
-      echo -ne "#define OPTFLAG_${NAME}_${FLAGS:$X:1}\t"
+      echo -ne "#define FLAG_${FLAGS:$X:1}\t"
       X=$(($X+1))
       echo "(1<<$((${#FLAGS}-$X)))"
     done
+    echo "#define TT this.${NAME}"
+    echo "#endif"
   done
 }
 
@@ -85,32 +106,6 @@ then
   scripts/config2help.py Config.in > generated/help.h || exit 1
 fi
 
-echo "Make generated/config.h from .config."
-
-# This long and roundabout sed invocation is to make old versions of sed happy.
-# New ones have '\n' so can replace one line with two without all the branches
-# and tedious mucking about with hold space.
-
-sed -n \
-  -e 's/^# CONFIG_\(.*\) is not set.*/\1/' \
-  -e 't notset' \
-  -e 's/^CONFIG_\(.*\)=y.*/\1/' \
-  -e 't isset' \
-  -e 's/^CONFIG_\([^=]*\)=\(.*\)/#define CFG_\1 \2/p' \
-  -e 'd' \
-  -e ':notset' \
-  -e 'h' \
-  -e 's/.*/#define CFG_& 0/p' \
-  -e 'g' \
-  -e 's/.*/#define USE_&(...)/p' \
-  -e 'd' \
-  -e ':isset' \
-  -e 'h' \
-  -e 's/.*/#define CFG_& 1/p' \
-  -e 'g' \
-  -e 's/.*/#define USE_&(...) __VA_ARGS__/p' \
-  .config > generated/config.h || exit 1
-
 # Extract a list of toys/*/*.c files to compile from the data in ".config":
 
 # 1) Get a list of C files in toys/* and glue them together into a regex we can
-- 
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