Add --with-system-libs configure option

Encompasses --with-system-gc, --with-system-memtailor,
--with-system-mathic, and --with-system-mathicgb

Author: d-torrance

M2/BUILD/docker/fedora/Makefile

@@ -14,8 +14,7 @@ rpmlint:;   docker run $(VOLUME) -it --entrypoint "" $(TAG) bash -c "rpmlint M2/
 ## autotools build
 ## TODO: generalize this to other distros, move to toplevel Makefile
 
-CONFIG_OPT = --with-system-gc --with-system-memtailor --with-system-mathic \
-	--with-system-mathicgb --enable-download --enable-rpm --prefix=/usr
+CONFIG_OPT = --with-system-libs --enable-download --enable-rpm --prefix=/usr
 
 define M2_BUILD_SCRIPT_autotools
 set -xe

M2/configure.ac

@@ -712,13 +712,18 @@ else if test $SHARED = no -a $TRY_STATIC = yes
      fi
 fi
 
+AC_ARG_WITH([system-libs],
+    [AS_HELP_STRING([--with-system-libs],
+        [use system gc, memtailor, mathic, and mathicgb instead of building them])],,
+    [with_system_libs=no])
+
 ## we build gc by default so we can configure it for large memory spaces
 ## see issue #2445
 AC_ARG_WITH([system-gc],
     [AS_HELP_STRING([--with-system-gc],
         [use system gc instead of building it])],
     [],
-    [with_system_gc=no])
+    [with_system_gc=$with_system_libs])
 
 AS_IF([test "x$with_system_gc" = xyes],
     [AC_MSG_CHECKING(whether package bdw-gc is provided)
@@ -1311,7 +1316,7 @@ AS_IF([test $BUILD_tbb = yes],
 AC_ARG_WITH([system-memtailor],
     [AS_HELP_STRING([--with-system-memtailor],
 	[use system memtailor instead of building git submodule])],,
-    [with_system_memtailor=no])
+    [with_system_memtailor=$with_system_libs])
 if test $with_system_memtailor = no
 then
     BUILD_memtailor=yes
@@ -1327,7 +1332,7 @@ fi
 AC_ARG_WITH([system-mathic],
     [AS_HELP_STRING([--with-system-mathic],
 	[use system mathic instead of building git submodule])],,
-    [with_system_mathic=no])
+    [with_system_mathic=$with_system_libs])
 if test $with_system_mathic = no
 then
     BUILD_mathic=yes
@@ -1343,7 +1348,7 @@ fi
 AC_ARG_WITH([system-mathicgb],
     [AS_HELP_STRING([--with-system-mathicgb],
 	[use system mathicgb instead of building git submodule])],,
-    [with_system_mathicgb=no])
+    [with_system_mathicgb=$with_system_libs])
 if test $with_system_mathicgb = no
 then
     BUILD_mathicgb=yes