add support for the GCC -include option.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@45810 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Driver/clang.cpp b/Driver/clang.cpp
index c2ebfb3..26cbd48 100644
--- a/Driver/clang.cpp
+++ b/Driver/clang.cpp
@@ -506,6 +506,11 @@
U_macros("U", llvm::cl::value_desc("macro"), llvm::cl::Prefix,
llvm::cl::desc("Undefine the specified macro"));
+static llvm::cl::list<std::string>
+ImplicitIncludes("include", llvm::cl::value_desc("file"),
+ llvm::cl::desc("Include file before parsing"));
+
+
// Append a #define line to Buf for Macro. Macro should be of the form XXX,
// in which case we emit "#define XXX 1" or "XXX=Y z W" in which case we emit
// "#define XXX Y z W". To get a #define with no value, use "XXX=".
@@ -526,6 +531,16 @@
Buf.push_back('\n');
}
+/// AddImplicitInclude - Add an implicit #include of the specified file to the
+/// predefines buffer.
+static void AddImplicitInclude(std::vector<char> &Buf, const std::string &File){
+ const char *Inc = "#include \"";
+ Buf.insert(Buf.end(), Inc, Inc+strlen(Inc));
+ Buf.insert(Buf.end(), File.begin(), File.end());
+ Buf.push_back('"');
+ Buf.push_back('\n');
+}
+
/// InitializePreprocessor - Initialize the preprocessor getting it and the
/// environment ready to process a single file. This returns the file ID for the
@@ -562,7 +577,11 @@
for (unsigned i = 0, e = U_macros.size(); i != e; ++i)
DefineBuiltinMacro(PredefineBuffer, U_macros[i].c_str(), "#undef ");
- // FIXME: Read any files specified by -imacros or -include.
+ // FIXME: Read any files specified by -imacros.
+
+ // Add implicit #includes from -include.
+ for (unsigned i = 0, e = ImplicitIncludes.size(); i != e; ++i)
+ AddImplicitInclude(PredefineBuffer, ImplicitIncludes[i]);
// Null terminate PredefinedBuffer and add it.
PredefineBuffer.push_back(0);
@@ -583,7 +602,7 @@
// FIXME: -nostdinc,-nostdinc++
// FIXME: -imultilib
//
-// FIXME: -include,-imacros
+// FIXME: -imacros
static llvm::cl::opt<bool>
nostdinc("nostdinc", llvm::cl::desc("Disable standard #include directories"));