Merge branch 'lukas/skip-extra-applications/OTP-11288' into maint

* lukas/skip-extra-applications/OTP-11288:
  Refactor and change EXTRA_APPLICATIONS to use ls
  Add configure option --without-$app

4 files changed, 58 insertions, 19 deletions

diff --git a/.gitignore b/.gitignore
index 7ccedd3ff3..9cd91245f5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -150,6 +150,7 @@ JAVADOC-GENERATED
 /erts/epmd/test/Emakefile
 
 /lib/*/SKIP
+/lib/SKIP-APPLICATIONS
 
 /lib/*/doc/html/*.html
 /lib/*/doc/html/*.css
diff --git a/HOWTO/INSTALL.md b/HOWTO/INSTALL.md
index fa1b9d2e89..5bde47e1f6 100644
--- a/HOWTO/INSTALL.md
+++ b/HOWTO/INSTALL.md
@@ -296,6 +296,12 @@ Some of the available `configure` options are:
     you can build using a fallback implementation based on mutexes or spinlocks.
     Performance of the SMP runtime system will however suffer immensely without
     an implementation for native atomic memory accesses.
+*   `--without-$app` - By default all applications in Erlang/OTP will be included
+	in a release. If this is not wanted it is possible to specify that Erlang/OTP
+	should be compiled without that applications, i.e. `--without-wx`. There is
+	no automatic dependency handling inbetween applications. So if you disable
+	an application that another depends on, you also have to disable the
+	dependant application.
 
 If you or your system has special requirements please read the `Makefile` for
 additional configuration information.
diff --git a/configure.in b/configure.in
index 4b3884864c..bcb0581e0d 100644
--- a/configure.in
+++ b/configure.in
@@ -390,6 +390,15 @@ if test X${enable_native_libs} = Xyes -a X${enable_hipe} != Xno; then
 fi
 AC_SUBST(NATIVE_LIBS_ENABLED)
 
+
+rm -f $ERL_TOP/lib/SKIP-APPLICATIONS
+for app in `cd lib && ls -d *`; do
+    var="with_$app"
+    if test X${!var} == Xno; then
+       echo "$app" >> $ERL_TOP/lib/SKIP-APPLICATIONS
+     fi
+done
+
 export ERL_TOP
 AC_CONFIG_SUBDIRS(lib erts)
 
@@ -400,15 +409,22 @@ AC_OUTPUT
 
 pattern="lib/*/SKIP"
 files=`echo $pattern`
-if test "$files" != "$pattern"; then
+if test "$files" != "$pattern" || test -f $ERL_TOP/lib/SKIP-APPLICATIONS; then
   echo '*********************************************************************'
   echo '**********************  APPLICATIONS DISABLED  **********************'
   echo '*********************************************************************'
   echo
-  for skipfile in $files; do
-    app=`dirname $skipfile`; app=`basename $app`
-    printf "%-15s: " $app; cat $skipfile
-  done
+  if test "$files" != "$pattern"; then
+    for skipfile in $files; do
+      app=`dirname $skipfile`; app=`basename $app`
+      printf "%-15s: " $app; cat $skipfile
+    done
+  fi
+  if test -f $ERL_TOP/lib/SKIP-APPLICATIONS; then
+    for skipapp in `cat $ERL_TOP/lib/SKIP-APPLICATIONS`; do
+      printf "%-15s: User gave --without-%s option\n" $skipapp $skipapp
+    done
+  fi
   echo
   echo '*********************************************************************'
 fi
diff --git a/lib/Makefile b/lib/Makefile
index 9ddf3a0544..47a6d5f9aa 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -19,20 +19,32 @@
 include $(ERL_TOP)/make/target.mk
 include $(ERL_TOP)/make/$(TARGET)/otp.mk
 
-ERTS_SUB_DIRECTORIES = stdlib sasl kernel compiler
-OTHER_SUB_DIRECTORIES = tools test_server common_test runtime_tools \
+
+# These have to be built first
+ERTS_APPLICATIONS = stdlib sasl kernel compiler
+
+# Then these have to be build
+ERLANG_APPLICATIONS = tools test_server common_test runtime_tools \
 			inets xmerl edoc erl_docgen
+
+# These are only build if -a is given to otp_build or make is used directly
+ALL_ERLANG_APPLICATIONS = snmp otp_mibs appmon erl_interface asn1 jinterface \
+	          wx debugger reltool gs \
+	          ic mnesia crypto orber os_mon parsetools syntax_tools \
+	          pman public_key ssl toolbar tv observer odbc diameter \
+	          cosTransactions cosEvent cosTime cosNotification \
+	          cosProperty cosFileTransfer cosEventDomain et megaco webtool \
+		  eunit ssh typer percept eldap dialyzer hipe
+
 ifdef BUILD_ALL
-  OTHER_SUB_DIRECTORIES += \
-          snmp otp_mibs appmon erl_interface asn1 jinterface \
-          wx debugger reltool gs \
-          ic mnesia crypto orber os_mon parsetools syntax_tools \
-          pman public_key ssl toolbar tv observer odbc diameter \
-          cosTransactions cosEvent cosTime cosNotification \
-          cosProperty cosFileTransfer cosEventDomain et megaco webtool \
-	  eunit ssh typer percept eldap dialyzer hipe
-  EXTRA_FILE := $(wildcard EXTRA-APPLICATIONS)
-  EXTRA_APPLICATIONS := $(if $(EXTRA_FILE),$(shell cat $(EXTRA_FILE)))
+  ERLANG_APPLICATIONS += $(ALL_ERLANG_APPLICATIONS)
+
+# We use whildcard */ to figure out if there are any other applications
+# in here.
+  EXPECTED_APPLICATIONS := $(ERTS_APPLICATIONS) $(ERLANG_APPLICATIONS) \
+	autom4te.cache
+  EXTRA_APPLICATIONS += $(filter-out $(EXPECTED_APPLICATIONS),\
+				$(subst /,,$(wildcard */)))
 endif
 
 ifdef BOOTSTRAP
@@ -45,13 +57,17 @@ else
     ifdef TERTIARY_BOOTSTRAP
       SUB_DIRECTORIES = snmp sasl jinterface ic syntax_tools wx
     else # Not bootstrap build
-      SUB_DIRECTORIES = $(ERTS_SUB_DIRECTORIES) \
-			$(OTHER_SUB_DIRECTORIES) \
+      SUB_DIRECTORIES = $(ERTS_APPLICATIONS) \
+			$(ERLANG_APPLICATIONS) \
 			$(EXTRA_APPLICATIONS)
     endif
   endif
 endif
 
+# Any applications listed in SKIP-APPLICATIONS should be skipped
+SKIP_FILE := $(wildcard SKIP-APPLICATIONS)
+SKIP_APPLICATIONS := $(if $(SKIP_FILE),$(shell cat $(SKIP_FILE)))
+SUB_DIRECTORIES := $(filter-out $(SKIP_APPLICATIONS),$(SUB_DIRECTORIES))
 
 # ----------------------------------------------------------------------
 include $(ERL_TOP)/make/otp_subdir.mk