Add a new macro for configuring projects, LLVM_CONFIG_PROJECT. This macro

takes care of the --with-llvmsrc and --with-llvmobj options for the project
It was moved here from the project's configure.ac file because there is
some tricky handling of the llvm_src variable to tell the project where the
llvm source tree is (for mkinstalldirs and install-sh commands).

llvm-svn: 20303

llvm/autoconf/m4/config_project.m4

@@ -0,0 +1,14 @@
+#
+# Provide the arguments and other processing needed for an LLVM project
+#
+AC_DEFUN([LLVM_CONFIG_PROJECT],
+  [AC_ARG_WITH([llvmsrc],
+    AS_HELP_STRING([--with-llvmsrc],[Location of LLVM Source Code]),
+    [llvm_src="$withval"],[llvm_src=`cd ${srcdir}/../..; pwd`])
+  AC_SUBST(LLVM_SRC,$llvm_src)
+  AC_ARG_WITH([llvmobj],
+    AS_HELP_STRING([--with-llvmobj],[Location of LLVM Object Code]),
+    [llvm_obj="$withval"],[llvm_obj=`cd ../..; pwd`])
+  AC_SUBST(LLVM_OBJ,$llvm_obj)
+  AC_CONFIG_COMMANDS([setup],,[llvm_src="${LLVM_SRC}"])
+])