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source: driver/cc1.cc@ 9fb8f01

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ADT arm-eh ast-experimental enum forall-pointer-decay jacob/cs343-translation jenkins-sandbox new-ast new-ast-unique-expr pthread-emulation qualifiedEnum

Last change on this file since 9fb8f01 was bbb1b35, checked in by Peter A. Buhr <pabuhr@…>, 6 years ago
first attempt at -save-temp for cfa-cpp output, formatting
Property mode set to `100644`
File size: 17.0 KB

Rev	Line
[b87a5ed]	1	//
	2	// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
	3	//
	4	// The contents of this file are covered under the licence agreement in the
	5	// file "LICENCE" distributed with Cforall.
	6	//
[6dc19544]	7	// cc1.cc --
[b87a5ed]	8	//
	9	// Author : Peter A. Buhr
[51b73452]	10	// Created On : Fri Aug 26 14:23:51 2005
	11	// Last Modified By : Peter A. Buhr
[bbb1b35]	12	// Last Modified On : Fri Aug 23 15:06:27 2019
	13	// Update Count : 371
[51b73452]	14	//
	15
	16	#include <iostream>
	17	using std::cerr;
	18	using std::endl;
	19	#include <string>
	20	using std::string;
[2c60af75]	21	#include <algorithm> // find
[b87a5ed]	22	#include <cstdio> // stderr, stdout, perror, fprintf
	23	#include <cstdlib> // getenv, exit, mkstemp
	24	#include <unistd.h> // execvp, fork, unlink
	25	#include <sys/wait.h> // wait
[bbb1b35]	26	#include <fcntl.h>
	27
[51b73452]	28
[b87a5ed]	29	#include "config.h" // configure info
[51b73452]	30
	31
	32	//#define __DEBUG_H__
	33
	34
[2c60af75]	35	static string installlibdir( CFA_LIBDIR ); // fixed location of cc1 and cfa-cpp commands when installed
	36	static string compiler_path( CFA_BACKEND_CC ); // path/name of C compiler
	37	static bool CFA_flag = false; // -CFA flag
[bbb1b35]	38	static bool save_temps = false; // -save-temps flag
[2c60af75]	39	static string o_file;
[51b73452]	40
[bbb1b35]	41
[2c60af75]	42	static bool prefix( const string & arg, const string & pre ) {
[b87a5ed]	43	return arg.substr( 0, pre.size() ) == pre;
[51b73452]	44	} // prefix
	45
[2c60af75]	46	static void suffix( const string & arg, const char * args[], int & nargs ) {
	47	enum { NumSuffixes = 3 };
	48	static const string suffixes[NumSuffixes] = { "cfa", "hfa", "ifa" };
[dffaeac]	49
	50	size_t dot = arg.find_last_of( "." );
[b740f0b]	51	if ( dot == string::npos ) return;
[2c60af75]	52	const string * end = suffixes + NumSuffixes;
	53	if ( std::find( suffixes, end, arg.substr( dot + 1 ) ) != end ) {
	54	args[nargs++] = "-x";
	55	args[nargs++] = "c";
	56	} // if
[dffaeac]	57	} // suffix
	58
[51b73452]	59
[2c60af75]	60	static string __CFA_FLAGPREFIX__( "__CFA_FLAG" );
[51b73452]	61
[2c60af75]	62	static void checkEnv1( const char * args[], int & nargs ) { // stage 1
	63	extern char ** environ;
[51b73452]	64
[2c60af75]	65	for ( int i = 0; environ[i]; i += 1 ) {
[bbb1b35]	66	string arg( environ[i] );
[dffaeac]	67	#ifdef __DEBUG_H__
[2c60af75]	68	cerr << "env arg:\"" << arg << "\"" << endl;
[dffaeac]	69	#endif // __DEBUG_H__
[51b73452]	70
[2c60af75]	71	if ( prefix( arg, __CFA_FLAGPREFIX__ ) ) {
[bbb1b35]	72	string val( arg.substr( __CFA_FLAGPREFIX__.size() + 4 ) );
[2c60af75]	73	if ( prefix( val, "-compiler=" ) ) {
	74	compiler_path = val.substr( 10 );
	75	} // if
	76	} // if
	77	} // for
	78	} // checkEnv1
	79
	80
	81	static void checkEnv2( const char * args[], int & nargs ) { // stage 2
	82	extern char ** environ;
	83
	84	for ( int i = 0; environ[i]; i += 1 ) {
[bbb1b35]	85	string arg( environ[i] );
[dffaeac]	86	#ifdef __DEBUG_H__
[2c60af75]	87	cerr << "env arg:\"" << arg << "\"" << endl;
[dffaeac]	88	#endif // __DEBUG_H__
[2c60af75]	89
	90	if ( prefix( arg, __CFA_FLAGPREFIX__ ) ) {
[bbb1b35]	91	string val( arg.substr( __CFA_FLAGPREFIX__.size() + 4 ) );
[2c60af75]	92	if ( prefix( val, "-compiler=" ) ) {
	93	compiler_path = val.substr( 10 );
[bbb1b35]	94	} else if ( val == "-CFA" ) {
[2c60af75]	95	CFA_flag = true;
[bbb1b35]	96	} else if ( val == "-save-temps" ) {
	97	save_temps = true;
[2c60af75]	98	} else if ( prefix( val, "-o=" ) ) { // output file for -CFA
	99	o_file = val.substr( 3 );
	100	} else {
	101	args[nargs++] = ( *new string( arg.substr( __CFA_FLAGPREFIX__.size() + 4 ) ) ).c_str();
	102	} // if
	103	} // if
	104	} // for
	105	} // checkEnv2
[51b73452]	106
	107
[2c60af75]	108	static char tmpname[] = P_tmpdir "/CFAXXXXXX.i";
	109	static int tmpfilefd = -1;
	110	static bool startrm = false;
	111
	112	static void rmtmpfile() {
[bbb1b35]	113	if ( tmpfilefd == -1 ) return; // RACE, file created ?
	114
[2c60af75]	115	startrm = true; // RACE with C-c C-c
[b87a5ed]	116	if ( unlink( tmpname ) == -1 ) { // remove tmpname
[2c60af75]	117	perror ( "CC1 Translator error: failed, unlink" );
[b87a5ed]	118	exit( EXIT_FAILURE );
	119	} // if
[2c60af75]	120	tmpfilefd = -1; // mark removed
[bdd516a]	121	} // rmtmpfile
	122
	123
[2c60af75]	124	static void sigTermHandler( int ) { // C-c C-c
	125	if ( startrm ) return; // return and let rmtmpfile finish, and then program finishes
	126
[b87a5ed]	127	if ( tmpfilefd != -1 ) { // RACE, file created ?
[2c60af75]	128	rmtmpfile(); // remove tmpname
[b87a5ed]	129	} // if
[2c60af75]	130	exit( EXIT_FAILURE ); // terminate
[bdd516a]	131	} // sigTermHandler
	132
	133
[2c60af75]	134	static void Stage1( const int argc, const char * const argv[] ) {
[b87a5ed]	135	int code;
	136	string arg;
[51b73452]	137
[bbb1b35]	138	const char * cpp_in = nullptr;
	139	const char * cpp_out = nullptr;
[51b73452]	140
[b87a5ed]	141	bool cpp_flag = false;
[2c60af75]	142	bool o_flag = false;
[51b73452]	143
[bbb1b35]	144	const char * args[argc + 100]; // leave space for 100 additional cpp command line values
[b87a5ed]	145	int nargs = 1; // number of arguments in args list; 0 => command name
[bdd516a]	146
[dffaeac]	147	#ifdef __DEBUG_H__
[7b937575]	148	cerr << "Stage1" << endl;
[dffaeac]	149	#endif // __DEBUG_H__
[2c60af75]	150	checkEnv1( args, nargs ); // arguments passed via environment variables
[bec4d24]	151	#ifdef __DEBUG_H__
	152	for ( int i = 1; i < argc; i += 1 ) {
	153	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
	154	} // for
	155	#endif // __DEBUG_H__
[7b937575]	156
[b87a5ed]	157	// process all the arguments
[51b73452]	158
[bec4d24]	159	for ( int i = 1; i < argc; i += 1 ) {
[b87a5ed]	160	arg = argv[i];
	161	if ( prefix( arg, "-" ) ) {
	162	// strip g++ flags that are inappropriate or cause duplicates in subsequent passes
	163
	164	if ( arg == "-quiet" ) {
	165	} else if ( arg == "-imultilib" \|\| arg == "-imultiarch" ) {
	166	i += 1; // and the argument
	167	} else if ( prefix( arg, "-A" ) ) {
	168	} else if ( prefix( arg, "-D__GNU" ) ) {
	169	//********
	170	// GCC 5.6.0 SEPARATED THE -D FROM THE ARGUMENT!
	171	//********
	172	} else if ( arg == "-D" && prefix( argv[i + 1], "__GNU" ) ) {
	173	i += 1; // and the argument
	174
	175	// strip flags controlling cpp step
	176
	177	} else if ( arg == "-D__CPP__" ) {
	178	cpp_flag = true;
	179	} else if ( arg == "-D" && string( argv[i + 1] ) == "__CPP__" ) {
	180	i += 1; // and the argument
	181	cpp_flag = true;
	182
[2c60af75]	183	// all other flags
[b87a5ed]	184
	185	} else if ( arg == "-o" ) {
	186	i += 1;
[2c60af75]	187	o_flag = true;
	188	cpp_out = argv[i];
[b87a5ed]	189	} else {
[2c60af75]	190	args[nargs++] = argv[i]; // pass the flag along
[b87a5ed]	191	// CPP flags with an argument
[f8b6d921]	192	if ( arg == "-D" \|\| arg == "-U" \|\| arg == "-I" \|\| arg == "-MF" \|\| arg == "-MT" \|\| arg == "-MQ" \|\|
[b87a5ed]	193	arg == "-include" \|\| arg == "-imacros" \|\| arg == "-idirafter" \|\| arg == "-iprefix" \|\|
	194	arg == "-iwithprefix" \|\| arg == "-iwithprefixbefore" \|\| arg == "-isystem" \|\| arg == "-isysroot" ) {
	195	i += 1;
[2c60af75]	196	args[nargs++] = argv[i]; // pass the argument along
[dffaeac]	197	#ifdef __DEBUG_H__
[b87a5ed]	198	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
[dffaeac]	199	#endif // __DEBUG_H__
[b87a5ed]	200	} else if ( arg == "-MD" \|\| arg == "-MMD" ) {
[2c60af75]	201	args[nargs++] = "-MF"; // insert before file
[b87a5ed]	202	i += 1;
[2c60af75]	203	args[nargs++] = argv[i]; // pass the argument along
[dffaeac]	204	#ifdef __DEBUG_H__
[b87a5ed]	205	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
[dffaeac]	206	#endif // __DEBUG_H__
[b87a5ed]	207	} // if
	208	} // if
	209	} else { // obtain input and possibly output files
[bbb1b35]	210	if ( cpp_in == nullptr ) {
[b87a5ed]	211	cpp_in = argv[i];
[dffaeac]	212	#ifdef __DEBUG_H__
[b87a5ed]	213	cerr << "cpp_in:\"" << cpp_in << "\"" << endl;
[dffaeac]	214	#endif // __DEBUG_H__
[bbb1b35]	215	} else if ( cpp_out == nullptr ) {
[b87a5ed]	216	cpp_out = argv[i];
[dffaeac]	217	#ifdef __DEBUG_H__
[b87a5ed]	218	cerr << "cpp_out:\"" << cpp_out << "\""<< endl;
[dffaeac]	219	#endif // __DEBUG_H__
[b87a5ed]	220	} else {
	221	cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
	222	exit( EXIT_FAILURE );
	223	} // if
	224	} // if
	225	} // for
	226
[dffaeac]	227	#ifdef __DEBUG_H__
[b87a5ed]	228	cerr << "args:";
[bec4d24]	229	for ( int i = 1; i < nargs; i += 1 ) {
[b87a5ed]	230	cerr << " " << args[i];
	231	} // for
[bbb1b35]	232	if ( cpp_in != nullptr ) cerr << " " << cpp_in;
	233	if ( cpp_out != nullptr ) cerr << " " << cpp_out;
[b87a5ed]	234	cerr << endl;
[dffaeac]	235	#endif // __DEBUG_H__
[b87a5ed]	236
[bbb1b35]	237	if ( cpp_in == nullptr ) {
[51b73452]	238	cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
	239	exit( EXIT_FAILURE );
	240	} // if
[b87a5ed]	241
	242	if ( cpp_flag ) {
	243	// The -E flag is specified on the cfa command so only run the preprocessor and output is written to standard
	244	// output or -o. The call to cfa has a -E so it does not have to be added to the argument list.
	245
[2c60af75]	246	args[0] = compiler_path.c_str();
[b740f0b]	247	suffix( cpp_in, args, nargs ); // check suffix
[2c60af75]	248	args[nargs++] = cpp_in;
	249	if ( o_flag ) { // location for output
	250	args[nargs++] = "-o";
[b87a5ed]	251	} // if
[2c60af75]	252	args[nargs++] = cpp_out;
[bbb1b35]	253	args[nargs] = nullptr; // terminate argument list
[51b73452]	254
[dffaeac]	255	#ifdef __DEBUG_H__
[b87a5ed]	256	cerr << "nargs: " << nargs << endl;
[bbb1b35]	257	for ( int i = 0; args[i] != nullptr; i += 1 ) {
[b87a5ed]	258	cerr << args[i] << " ";
	259	} // for
	260	cerr << endl;
[dffaeac]	261	#endif // __DEBUG_H__
[51b73452]	262
[bbb1b35]	263	execvp( args[0], (char * const *)args ); // should not return
[2c60af75]	264	perror( "CC1 Translator error: stage 1, execvp" );
[b87a5ed]	265	exit( EXIT_FAILURE );
[51b73452]	266	} // if
	267
[2c60af75]	268	// Run the C preprocessor and save the output in the given file.
[51b73452]	269
[b87a5ed]	270	if ( fork() == 0 ) { // child process ?
	271	// -o xxx.ii cannot be used to write the output file from cpp because no output file is created if cpp detects
	272	// an error (e.g., cannot find include file). Whereas, output is always generated, even when there is an error,
	273	// when cpp writes to stdout. Hence, stdout is redirected into the temporary file.
[bbb1b35]	274	if ( freopen( cpp_out, "w", stdout ) == nullptr ) { // redirect stdout to output file
[2c60af75]	275	perror( "CC1 Translator error: stage 1, freopen" );
[b87a5ed]	276	exit( EXIT_FAILURE );
	277	} // if
[51b73452]	278
[2c60af75]	279	args[0] = compiler_path.c_str();
[b740f0b]	280	suffix( cpp_in, args, nargs ); // check suffix
[2c60af75]	281	args[nargs++] = cpp_in; // input to cpp
[bbb1b35]	282	args[nargs] = nullptr; // terminate argument list
[51b73452]	283
[dffaeac]	284	#ifdef __DEBUG_H__
[b87a5ed]	285	cerr << "cpp nargs: " << nargs << endl;
[bbb1b35]	286	for ( int i = 0; args[i] != nullptr; i += 1 ) {
[b87a5ed]	287	cerr << args[i] << " ";
	288	} // for
	289	cerr << endl;
[dffaeac]	290	#endif // __DEBUG_H__
[51b73452]	291
[bbb1b35]	292	execvp( args[0], (char * const *)args ); // should not return
[2c60af75]	293	perror( "CC1 Translator error: stage 1, execvp" );
[b87a5ed]	294	exit( EXIT_FAILURE );
[51b73452]	295	} // if
	296
[b87a5ed]	297	wait( &code ); // wait for child to finish
[51b73452]	298
[dffaeac]	299	#ifdef __DEBUG_H__
[b87a5ed]	300	cerr << "return code from cpp:" << WEXITSTATUS(code) << endl;
[dffaeac]	301	#endif // __DEBUG_H__
[51b73452]	302
[b87a5ed]	303	if ( WIFSIGNALED(code) ) { // child failed ?
[2c60af75]	304	cerr << "CC1 Translator error: stage 1, child failed " << WTERMSIG(code) << endl;
[b87a5ed]	305	exit( EXIT_FAILURE );
	306	} // if
[51b73452]	307
[2c60af75]	308	exit( WEXITSTATUS(code) ); // bad cpp result stops top-level gcc
[51b73452]	309	} // Stage1
	310
	311
[2c60af75]	312	static void Stage2( const int argc, const char * const * argv ) {
	313	int code;
[b87a5ed]	314	string arg;
[51b73452]	315
[bbb1b35]	316	const char * cpp_in = nullptr;
	317	const char * cpp_out = nullptr;
[51b73452]	318
[bbb1b35]	319	const char * args[argc + 100]; // leave space for 100 additional cfa command line values
[b87a5ed]	320	int nargs = 1; // number of arguments in args list; 0 => command name
[bbb1b35]	321	const char * cargs[20]; // leave space for 20 additional cfa-cpp command line values
[2c60af75]	322	int ncargs = 1; // 0 => command name
[51b73452]	323
[dffaeac]	324	#ifdef __DEBUG_H__
[7b937575]	325	cerr << "Stage2" << endl;
[dffaeac]	326	#endif // __DEBUG_H__
[2c60af75]	327	checkEnv2( cargs, ncargs ); // arguments passed via environment variables
[bec4d24]	328	#ifdef __DEBUG_H__
	329	for ( int i = 1; i < argc; i += 1 ) {
	330	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
	331	} // for
	332	#endif // __DEBUG_H__
[7b937575]	333
[b87a5ed]	334	// process all the arguments
[51b73452]	335
[bec4d24]	336	for ( int i = 1; i < argc; i += 1 ) {
[b87a5ed]	337	arg = argv[i];
	338	if ( prefix( arg, "-" ) ) {
	339	// strip inappropriate flags
[51b73452]	340
[b87a5ed]	341	if ( arg == "-quiet" \|\| arg == "-version" \|\| arg == "-fpreprocessed" \|\|
[dffaeac]	342	// Currently CFA does not suppose precompiled .h files.
	343	prefix( arg, "--output-pch" ) ) {
[51b73452]	344
[b87a5ed]	345	// strip inappropriate flags with an argument
[51b73452]	346
[b87a5ed]	347	} else if ( arg == "-auxbase" \|\| arg == "-auxbase-strip" \|\| arg == "-dumpbase" ) {
	348	i += 1;
[dffaeac]	349	#ifdef __DEBUG_H__
[b87a5ed]	350	cerr << "arg:\"" << argv[i] << "\"" << endl;
[dffaeac]	351	#endif // __DEBUG_H__
[51b73452]	352
[b87a5ed]	353	// all other flags
[51b73452]	354
[b87a5ed]	355	} else {
[2c60af75]	356	args[nargs++] = argv[i]; // pass the flag along
[b87a5ed]	357	if ( arg == "-o" ) {
	358	i += 1;
[2c60af75]	359	cpp_out = argv[i];
	360	args[nargs++] = argv[i]; // pass the argument along
[68bceeb]	361	#ifdef __DEBUG_H__
[b87a5ed]	362	cerr << "arg:\"" << argv[i] << "\"" << endl;
[68bceeb]	363	#endif // __DEBUG_H__
[b87a5ed]	364	} // if
	365	} // if
	366	} else { // obtain input and possibly output files
[bbb1b35]	367	if ( cpp_in == nullptr ) {
[b87a5ed]	368	cpp_in = argv[i];
[dffaeac]	369	#ifdef __DEBUG_H__
[b87a5ed]	370	cerr << "cpp_in:\"" << cpp_in << "\"" << endl;
[dffaeac]	371	#endif // __DEBUG_H__
[bbb1b35]	372	} else if ( cpp_out == nullptr ) {
[2c60af75]	373	cpp_out = argv[i];
	374	#ifdef __DEBUG_H__
	375	cerr << "cpp_out:\"" << cpp_out << "\""<< endl;
	376	#endif // __DEBUG_H__
[b87a5ed]	377	} else {
[bbb1b35]	378	cerr << "Usage: " << argv[0] << " more than two files specified" << endl;
[b87a5ed]	379	exit( EXIT_FAILURE );
	380	} // if
	381	} // if
	382	} // for
[51b73452]	383
[bbb1b35]	384	if ( cpp_in == nullptr ) {
	385	cerr << "Usage: " << argv[0] << " missing input file" << endl;
	386	exit( EXIT_FAILURE );
	387	} // if
	388	if ( cpp_out == nullptr ) {
	389	cerr << "Usage: " << argv[0] << " missing output file" << endl;
	390	exit( EXIT_FAILURE );
	391	} // if
	392
[2c60af75]	393	// Create a temporary file, if needed, to store output of the cfa-cpp preprocessor. Cannot be created in forked
	394	// process because variables tmpname and tmpfilefd are cloned.
	395
[bbb1b35]	396	string cfa_cpp_out;
	397
	398	if ( ! CFA_flag ) { // run compiler ?
	399	if ( save_temps ) {
	400	cfa_cpp_out = cpp_in;
	401	size_t dot = cfa_cpp_out.find_last_of( "." );
	402	if ( dot == string::npos ) {
	403	cerr << "CC1 Translator error: stage 2, bad file name " << endl;
	404	exit( EXIT_FAILURE );
	405	} // if
[2c60af75]	406
[bbb1b35]	407	cfa_cpp_out = cfa_cpp_out.substr( 0, dot ) + ".ifa";
	408	if ( creat( cfa_cpp_out.c_str(), 0666 ) == -1 ) {
	409	perror( "CC1 Translator error: stage 2, creat" );
	410	exit( EXIT_FAILURE );
	411	} // if
	412	} else {
	413	tmpfilefd = mkstemps( tmpname, 2 );
	414	if ( tmpfilefd == -1 ) {
	415	perror( "CC1 Translator error: stage 2, mkstemp" );
	416	exit( EXIT_FAILURE );
	417	} // if
	418	cfa_cpp_out = tmpname;
	419	} // if
[2c60af75]	420	#ifdef __DEBUG_H__
[bbb1b35]	421	cerr << "cfa_cpp_out: " << cfa_cpp_out << endl;
[2c60af75]	422	#endif // __DEBUG_H__
	423	} // if
	424
	425	// If -CFA flag specified, run the cfa-cpp preprocessor on the temporary file, and output is written to standard
	426	// output. Otherwise, run the cfa-cpp preprocessor on the temporary file and save the result into the output file.
	427
	428	if ( fork() == 0 ) { // child runs CFA
	429	cargs[0] = ( *new string( installlibdir + "cfa-cpp" ) ).c_str();
	430
	431	cargs[ncargs++] = cpp_in;
	432
	433	if ( CFA_flag ) { // run cfa-cpp ?
	434	if ( o_file.size() != 0 ) { // location for output
	435	cargs[ncargs++] = ( *new string( o_file.c_str() ) ).c_str();
	436	} // if
	437	} else {
[bbb1b35]	438	cargs[ncargs++] = cfa_cpp_out.c_str();
[2c60af75]	439	} // if
[bbb1b35]	440	cargs[ncargs] = nullptr; // terminate argument list
[2c60af75]	441
	442	#ifdef __DEBUG_H__
[bbb1b35]	443	for ( int i = 0; cargs[i] != nullptr; i += 1 ) {
[2c60af75]	444	cerr << cargs[i] << " ";
	445	} // for
	446	cerr << endl;
	447	#endif // __DEBUG_H__
	448
	449	execvp( cargs[0], (char * const *)cargs ); // should not return
	450	perror( "CC1 Translator error: stage 2, execvp" );
	451	exit( EXIT_FAILURE );
	452	} // if
	453
	454	wait( &code ); // wait for child to finish
	455
	456	if ( WIFSIGNALED(code) ) { // child failed ?
	457	rmtmpfile(); // remove tmpname
	458	cerr << "CC1 Translator error: stage 2, child failed " << WTERMSIG(code) << endl;
	459	exit( EXIT_FAILURE );
	460	} // if
	461
	462	if ( CFA_flag ) { // no tmpfile created
	463	exit( WEXITSTATUS( code ) ); // stop regardless of success or failure
	464	} // if
	465
	466	#ifdef __DEBUG_H__
	467	cerr << "return code from cfa-cpp:" << WEXITSTATUS(code) << endl;
	468	#endif // __DEBUG_H__
	469
	470	if ( WEXITSTATUS(code) ) { // child error ?
	471	rmtmpfile(); // remove tmpname
	472	exit( WEXITSTATUS( code ) ); // do not continue
	473	} // if
	474
[dffaeac]	475	#ifdef __DEBUG_H__
[b87a5ed]	476	cerr << "args:";
[bec4d24]	477	for ( int i = 1; i < nargs; i += 1 ) {
[b87a5ed]	478	cerr << " " << args[i];
	479	} // for
[bbb1b35]	480	cerr << " " << cpp_in << endl;
[dffaeac]	481	#endif // __DEBUG_H__
[51b73452]	482
[2c60af75]	483	if ( fork() == 0 ) { // child runs CFA
	484	args[0] = compiler_path.c_str();
	485	args[nargs++] = "-S"; // only compile and put assembler output in specified file
[bbb1b35]	486	if ( save_temps ) { // make gcc accept .ifa suffix
	487	args[nargs++] = "-x";
	488	args[nargs++] = "cpp-output";
	489	} // if
	490	args[nargs++] = cfa_cpp_out.c_str();
	491	args[nargs] = nullptr; // terminate argument list
[2c60af75]	492
	493	#ifdef __DEBUG_H__
	494	cerr << "stage2 nargs: " << nargs << endl;
[bbb1b35]	495	for ( int i = 0; args[i] != nullptr; i += 1 ) {
[2c60af75]	496	cerr << args[i] << " ";
	497	} // for
	498	cerr << endl;
	499	#endif // __DEBUG_H__
	500
	501	execvp( args[0], (char * const *)args ); // should not return
	502	perror( "CC1 Translator error: stage 2, execvp" );
	503	exit( EXIT_FAILURE ); // tell gcc not to go any further
	504	} // if
	505
	506	wait( &code ); // wait for child to finish
	507
	508	if ( WIFSIGNALED(code) ) { // child failed ?
	509	rmtmpfile(); // remove tmpname
	510	cerr << "CC1 Translator error: stage 2, child failed " << WTERMSIG(code) << endl;
	511	exit( EXIT_FAILURE );
	512	} // if
[51b73452]	513
[dffaeac]	514	#ifdef __DEBUG_H__
[2c60af75]	515	cerr << "return code from gcc cc1:" << WEXITSTATUS(code) << endl;
[dffaeac]	516	#endif // __DEBUG_H__
[51b73452]	517
[2c60af75]	518	rmtmpfile(); // remove tmpname
	519	exit( WEXITSTATUS( code ) ); // stop regardless of success or failure
[51b73452]	520	} // Stage2
	521
	522
[2c60af75]	523	// This program is called twice because of the -no-integrated-cpp. The calls are differentiated by the first
	524	// command-line argument. The first call replaces the traditional cpp pass to preprocess the C program. The second call
	525	// is to the compiler, which is broken into two steps: preprocess again with cfa-cpp and then call gcc to compile the
	526	// doubly preprocessed program.
	527
[b3c36f4]	528	int main( const int argc, const char * const argv[], __attribute__((unused)) const char * const env[] ) {
[dffaeac]	529	#ifdef __DEBUG_H__
[bbb1b35]	530	for ( int i = 0; env[i] != nullptr; i += 1 ) {
[b87a5ed]	531	cerr << env[i] << endl;
	532	} // for
[dffaeac]	533	#endif // __DEBUG_H__
[51b73452]	534
[2c60af75]	535	signal( SIGINT, sigTermHandler );
	536	signal( SIGTERM, sigTermHandler );
	537
[bbb1b35]	538	string arg( argv[1] );
[51b73452]	539
[b87a5ed]	540	// Currently, stage 1 starts with flag -E and stage 2 with flag -fpreprocessed.
[51b73452]	541
[b87a5ed]	542	if ( arg == "-E" ) {
	543	Stage1( argc, argv );
	544	} else if ( arg == "-fpreprocessed" ) {
	545	Stage2( argc, argv );
	546	} else {
	547	cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
	548	exit( EXIT_FAILURE );
	549	} // if
[51b73452]	550	} // main
	551
	552	// Local Variables: //
[b87a5ed]	553	// tab-width: 4 //
	554	// mode: c++ //
[51b73452]	555	// compile-command: "make install" //
	556	// End: //

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