[swift] autoconf support

Summary: Allow disabling swift and provide variable SWIFTC for makefile use.

Reviewed By: geralt-encore

Differential Revision: D68548690

fbshipit-source-id: 25372c2b6f663d765b7d187482400e34bb2f1215

Makefile.autoconf.in

@@ -93,6 +93,7 @@ REALPATH := @REALPATH@
 REBAR3 := @REBAR3@
 SDKROOT := @SDKROOT@
 SHASUM := @SHASUM@
+SWIFTC := @SWIFTC@
 USER_JAVA_HOME := @USER_JAVA_HOME@
 UTOP := @UTOP@
 WINDOWS_BUILD := @WINDOWS_BUILD@

configure.ac

@@ -150,6 +150,14 @@ AC_ARG_ENABLE(python-analyzers,
 BUILD_PYTHON_ANALYZERS=$enable_python_analyzers
 AC_SUBST([BUILD_PYTHON_ANALYZERS])
 
+AC_ARG_ENABLE(swift-analyzers,
+  AS_HELP_STRING([--disable-swift-analyzers],
+    [do not build the Swift analyzers (default is to build them)]),
+  ,
+  enable_swift_analyzers=yes)
+BUILD_SWIFT_ANALYZERS=$enable_swift_analyzers
+AC_SUBST([BUILD_SWIFT_ANALYZERS])
+
 AC_ARG_WITH(fcp-clang,
   AS_HELP_STRING([--with-fcp-clang],
     [use $CLANG_PREFIX/bin/clang to override the default compiler (default is not to override)]),
@@ -348,6 +356,10 @@ AS_IF([$HACKC --version >/dev/null 2>/dev/null],
   [HACKC=no
    AC_MSG_RESULT([no])])
 
+if test "x$enable_swift_analyzers" = "xyes"; then
+  AC_CHECK_TOOL([SWIFTC], [swiftc], [no])
+fi
+
 if test "x$enable_java_analyzers" = "xyes"; then
   AC_CHECK_TOOL([JAVA], [java], [no])
   AC_CHECK_TOOL([JAVAC], [javac], [no])
@@ -420,6 +432,7 @@ ENABLE_OCAML_BINANNOT=$enable_ocaml_bin_annot
 AC_SUBST([ENABLE_OCAML_BINANNOT])
 
 
+
 # We use Buck to run the Infer tests
 AS_IF([test x"$is_facebook_tree" = x"yes"],
   AC_MSG_CHECKING([which .buckjavaversion to use])

infer/src/base/Version.ml.in

@@ -61,4 +61,4 @@ let python_exe = "@PYTHON@"
 
 let python_enabled = is_yes "@BUILD_PYTHON_ANALYZERS@"
 
-let swift_enabled = is_yes "yes"
+let swift_enabled = is_yes "@BUILD_SWIFT_ANALYZERS@"