Bug 1257468 - Replace tests on BUILDING_JS with tests on MOZ_BUILD_APP==js. r=nalexander

Now that MOZ_BUILD_APP is set to js when building js/src, we can
distinguish those builds with MOZ_BUILD_APP==js instead of BUILDING_JS.
Consequently, remove BUILDING_JS.

build/autoconf/ffi.m4

@@ -23,7 +23,7 @@ AC_SUBST(MOZ_SYSTEM_FFI)
 ])
 
 AC_DEFUN([MOZ_SUBCONFIGURE_FFI], [
-if test -z "$BUILDING_JS" -o -n "$JS_STANDALONE"; then
+if test "$MOZ_BUILD_APP" != js -o -n "$JS_STANDALONE"; then
 
   if test "$BUILD_CTYPES" -a -z "$MOZ_SYSTEM_FFI"; then
     # Run the libffi 'configure' script.

build/autoconf/icu.m4

@@ -128,7 +128,7 @@ fi
 
 AC_DEFUN([MOZ_SUBCONFIGURE_ICU], [
 
-if test -z "$BUILDING_JS" -o -n "$JS_STANDALONE"; then
+if test "$MOZ_BUILD_APP" != js -o -n "$JS_STANDALONE"; then
 
     if test -n "$USE_ICU" -a -z "$MOZ_SYSTEM_ICU"; then
         # Set ICU compile options

build/autoconf/jemalloc.m4

@@ -4,7 +4,7 @@ dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 AC_DEFUN([MOZ_SUBCONFIGURE_JEMALLOC], [
 
-if test -z "$BUILDING_JS" -o -n "$JS_STANDALONE"; then
+if test "$MOZ_BUILD_APP" != js -o -n "$JS_STANDALONE"; then
 
   # Run jemalloc configure script
 

build/autoconf/nspr-build.m4

@@ -8,11 +8,11 @@ ifelse([$1],,define(CONFIGURING_JS,yes))
 
 dnl Possible ways this can be called:
 dnl   from toplevel configure:
-dnl     JS_STANDALONE=  BUILDING_JS=
+dnl     JS_STANDALONE=  MOZ_BUILD_APP!=js
 dnl   from js/src/configure invoked by toplevel configure:
-dnl     JS_STANDALONE=  BUILDING_JS=1
+dnl     JS_STANDALONE=  MOZ_BUILD_APP=js
 dnl   from standalone js/src/configure:
-dnl     JS_STANDALONE=1 BUILDING_JS=1
+dnl     JS_STANDALONE=1 MOZ_BUILD_APP=js
 
 dnl ========================================================
 dnl = Find the right NSPR to use.
@@ -38,7 +38,7 @@ ifdef([CONFIGURING_JS],[
         MOZ_BUILD_NSPR=)
 ])
 
-if test -z "$BUILDING_JS" || test -n "$JS_STANDALONE"; then
+if test "$MOZ_BUILD_APP" != js || test -n "$JS_STANDALONE"; then
   _IS_OUTER_CONFIGURE=1
 fi
 
@@ -99,7 +99,7 @@ else
 fi
 
 if test -z "$nspr_opts"; then
-    if test -z "$BUILDING_JS"; then
+    if test "$MOZ_BUILD_APP" != js; then
       dnl Toplevel configure defaults to using nsprpub from the source tree
       MOZ_BUILD_NSPR=1
       which_nspr="source-tree"
@@ -124,7 +124,7 @@ fi
 
 AC_SUBST(MOZ_BUILD_NSPR)
 
-if test -n "$BUILDING_JS"; then
+if test "$MOZ_BUILD_APP" = js; then
   if test "$JS_POSIX_NSPR" = 1; then
     AC_DEFINE(JS_POSIX_NSPR)
   fi

configure.py

@@ -58,7 +58,7 @@ def config_status(config):
         fh.write("__all__ = ['topobjdir', 'topsrcdir', 'defines', "
                  "'non_global_defines', 'substs']")
 
-        if not config.get('BUILDING_JS') or config.get('JS_STANDALONE'):
+        if config.get('MOZ_BUILD_APP') != 'js' or config.get('JS_STANDALONE'):
             fh.write('''
 if __name__ == '__main__':
     args = dict([(name, globals()[name]) for name in __all__])
@@ -69,7 +69,7 @@ if __name__ == '__main__':
     # Other things than us are going to run this file, so we need to give it
     # executable permissions.
     os.chmod('config.status', 0755)
-    if not config.get('BUILDING_JS') or config.get('JS_STANDALONE'):
+    if config.get('MOZ_BUILD_APP') != 'js' or config.get('JS_STANDALONE'):
         if not config.get('JS_STANDALONE'):
             os.environ['WRITE_MOZINFO'] = '1'
         # Until we have access to the virtualenv from this script, execute

js/src/old-configure.in

@@ -85,8 +85,6 @@ else
   DIST="$MOZ_BUILD_ROOT/dist"
 fi
 AC_SUBST(JS_STANDALONE)
-BUILDING_JS=1
-AC_SUBST(BUILDING_JS)
 AC_SUBST(autoconfmk)
 
 MOZ_ARG_WITH_STRING(gonk-toolchain-prefix,