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Added an option to TableGen that allows users to specify a directory in which 

to find include files.  TableGen will load include files from this directory if
it cannot find them in the current directory.
This feature was needed for building code inside the object tree (a la autoconf
style).
TODO: Allow for multiple -I options to specify a list of directories to search.

llvm-svn: 8159
This commit is contained in:
John Criswell 2003-08-27 13:41:57 +00:00
parent 7b972a24e1
commit 3ec1fab3ad
2 changed files with 42 additions and 5 deletions
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39
llvm/support/tools/TableGen/FileLexer.l
View File

@ -21,9 +21,13 @@
%{
#include "Record.h"
#include "Support/CommandLine.h"
typedef std::pair<Record*, std::vector<Init*>*> SubClassRefTy;
#include "FileParser.h"
// Global variable recording the location of the include directory
std::string IncludeDirectory;
// ParseInt - This has to handle the special case of binary numbers 0b0101
static int ParseInt(const char *Str) {
if (Str[0] == '0' && Str[1] == 'b')
@ -61,7 +65,18 @@ std::ostream &err() {
int Fileparse();
void ParseFile(const std::string &Filename) {
//
// Function: ParseFile()
//
// Description:
// This function begins the parsing of the specified tablegen file.
//
// Inputs:
// Filename - A string containing the name of the file to parse.
// IncludeDir - A string containing the directory from which include
// files can be found.
//
void ParseFile(const std::string &Filename, const std::string & IncludeDir) {
FILE *F = stdin;
if (Filename != "-") {
F = fopen(Filename.c_str(), "r");
@ -75,6 +90,12 @@ void ParseFile(const std::string &Filename) {
IncludeStack.push_back(IncludeRec("<stdin>", stdin));
}
//
// Record the location of the include directory so that the lexer can find
// it later.
//
IncludeDirectory = IncludeDir;
Filein = F;
Filelineno = 1;
Fileparse();
@ -103,8 +124,20 @@ static void HandleInclude(const char *Buffer) {
// Open the new input file...
yyin = fopen(Filename.c_str(), "r");
if (yyin == 0) {
err() << "Could not find include file '" << Filename << "'!\n";
abort();
//
// If we couldn't find the file in the current directory, look for it in
// the include directories.
//
// NOTE:
// Right now, there is only one directory. We need to eventually add
// support for more.
//
Filename = IncludeDirectory + "/" + Filename;
yyin = fopen(Filename.c_str(), "r");
if (yyin == 0) {
err() << "Could not find include file '" << Filename << "'!\n";
abort();
}
}
// Add the file to our include stack...

8
llvm/support/tools/TableGen/TableGen.cpp
View File

@ -64,10 +64,14 @@ namespace {
cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"));
cl::opt<std::string>
IncludeDir("I", cl::desc("Directory of include files"),
cl::value_desc("directory"), cl::init(""));
}
void ParseFile(const std::string &Filename);
void ParseFile(const std::string &Filename, const std::string & IncludeDir);
RecordKeeper Records;
@ -398,7 +402,7 @@ static void ParseMachineCode() {
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv);
ParseFile(InputFilename);
ParseFile(InputFilename, IncludeDir);
std::ostream *Out = &std::cout;
if (OutputFilename != "-") {