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source: driver/cc1.cc @ aeb31b1

ADTarm-ehast-experimentalenumforall-pointer-decayjacob/cs343-translationnew-ast-unique-exprpthread-emulationqualifiedEnum

Last change on this file since aeb31b1 was b4130f9, checked in by Peter A. Buhr <pabuhr@…>, 4 years ago
add command-line flag --save-temp along with -save-temp
Property mode set to `100644`
File size: 18.3 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
[51b7345]	10	// Created On : Fri Aug 26 14:23:51 2005
	11	// Last Modified By : Peter A. Buhr
[b4130f9]	12	// Last Modified On : Tue Nov 17 14:27:08 2020
	13	// Update Count : 414
[51b7345]	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
[36de20d]	26	#include <fcntl.h> // creat
[bbb1b35]	27
[51b7345]	28
[b87a5ed]	29	#include "config.h" // configure info
[51b7345]	30
	31
	32	//#define __DEBUG_H__
	33
	34
[33c849e]	35	static string compiler_path( CFA_BACKEND_CC ); // C compiler path/name
[2c60af75]	36	static bool CFA_flag = false; // -CFA flag
[bbb1b35]	37	static bool save_temps = false; // -save-temps flag
[2c60af75]	38	static string o_file;
[417a630]	39	static string bprefix;
[0163d3e]	40	static string lang; // -x flag
[51b7345]	41
[bbb1b35]	42
[2c60af75]	43	static bool prefix( const string & arg, const string & pre ) {
[b87a5ed]	44	return arg.substr( 0, pre.size() ) == pre;
[51b7345]	45	} // prefix
	46
[2c60af75]	47	static void suffix( const string & arg, const char * args[], int & nargs ) {
	48	enum { NumSuffixes = 3 };
	49	static const string suffixes[NumSuffixes] = { "cfa", "hfa", "ifa" };
[dffaeac]	50
	51	size_t dot = arg.find_last_of( "." );
[b740f0b]	52	if ( dot == string::npos ) return;
[2c60af75]	53	const string * end = suffixes + NumSuffixes;
	54	if ( std::find( suffixes, end, arg.substr( dot + 1 ) ) != end ) {
	55	args[nargs++] = "-x";
	56	args[nargs++] = "c";
	57	} // if
[dffaeac]	58	} // suffix
	59
[51b7345]	60
[36de20d]	61	static string __CFA_FLAGPREFIX__( "__CFA_FLAG" ); // "__CFA_FLAG__=" suffix
[51b7345]	62
[2c60af75]	63	static void checkEnv1( const char * args[], int & nargs ) { // stage 1
	64	extern char ** environ;
[51b7345]	65
[2c60af75]	66	for ( int i = 0; environ[i]; i += 1 ) {
[bbb1b35]	67	string arg( environ[i] );
[dffaeac]	68	#ifdef __DEBUG_H__
[2c60af75]	69	cerr << "env arg:\"" << arg << "\"" << endl;
[dffaeac]	70	#endif // __DEBUG_H__
[51b7345]	71
[2c60af75]	72	if ( prefix( arg, __CFA_FLAGPREFIX__ ) ) {
[0bf5340]	73	string val( arg.substr( arg.find_first_of( "=" ) + 1 ) );
[2c60af75]	74	if ( prefix( val, "-compiler=" ) ) {
	75	compiler_path = val.substr( 10 );
[0163d3e]	76	} else if ( prefix( val, "-x=" ) ) {
	77	lang = val.substr( 3 );
[2c60af75]	78	} // if
	79	} // if
	80	} // for
	81	} // checkEnv1
	82
	83
	84	static void checkEnv2( const char * args[], int & nargs ) { // stage 2
	85	extern char ** environ;
	86
	87	for ( int i = 0; environ[i]; i += 1 ) {
[bbb1b35]	88	string arg( environ[i] );
[dffaeac]	89	#ifdef __DEBUG_H__
[2c60af75]	90	cerr << "env arg:\"" << arg << "\"" << endl;
[dffaeac]	91	#endif // __DEBUG_H__
[2c60af75]	92
	93	if ( prefix( arg, __CFA_FLAGPREFIX__ ) ) {
[0bf5340]	94	string val( arg.substr( arg.find_first_of( "=" ) + 1 ) );
[2c60af75]	95	if ( prefix( val, "-compiler=" ) ) {
	96	compiler_path = val.substr( 10 );
[bbb1b35]	97	} else if ( val == "-CFA" ) {
[2c60af75]	98	CFA_flag = true;
[b4130f9]	99	} else if ( val == "-save-temps" \|\| val == "--save-temps" ) {
[bbb1b35]	100	save_temps = true;
[2c60af75]	101	} else if ( prefix( val, "-o=" ) ) { // output file for -CFA
	102	o_file = val.substr( 3 );
[417a630]	103	} else if ( prefix( val, "-B=" ) ) { // location of cfa-cpp
	104	bprefix = val.substr( 3 );
[0163d3e]	105	} else if ( prefix( val, "-x=" ) ) { // ignore
[33c849e]	106	} else { // normal flag for cfa-cpp
[0bf5340]	107	args[nargs++] = ( *new string( arg.substr( arg.find_first_of( "=" ) + 1 ) ) ).c_str();
[2c60af75]	108	} // if
	109	} // if
	110	} // for
	111	} // checkEnv2
[51b7345]	112
[36de20d]	113	#define CFA_SUFFIX ".ifa"
[51b7345]	114
[36de20d]	115	static char tmpname[] = P_tmpdir "/CFAXXXXXX" CFA_SUFFIX;
[2c60af75]	116	static int tmpfilefd = -1;
	117	static bool startrm = false;
	118
	119	static void rmtmpfile() {
[bbb1b35]	120	if ( tmpfilefd == -1 ) return; // RACE, file created ?
	121
[2c60af75]	122	startrm = true; // RACE with C-c C-c
[b87a5ed]	123	if ( unlink( tmpname ) == -1 ) { // remove tmpname
[2c60af75]	124	perror ( "CC1 Translator error: failed, unlink" );
[b87a5ed]	125	exit( EXIT_FAILURE );
	126	} // if
[2c60af75]	127	tmpfilefd = -1; // mark removed
[bdd516a]	128	} // rmtmpfile
	129
	130
[2c60af75]	131	static void sigTermHandler( int ) { // C-c C-c
	132	if ( startrm ) return; // return and let rmtmpfile finish, and then program finishes
	133
[b87a5ed]	134	if ( tmpfilefd != -1 ) { // RACE, file created ?
[2c60af75]	135	rmtmpfile(); // remove tmpname
[b87a5ed]	136	} // if
[2c60af75]	137	exit( EXIT_FAILURE ); // terminate
[bdd516a]	138	} // sigTermHandler
	139
	140
[2c60af75]	141	static void Stage1( const int argc, const char * const argv[] ) {
[b87a5ed]	142	int code;
	143	string arg;
[51b7345]	144
[bbb1b35]	145	const char * cpp_in = nullptr;
	146	const char * cpp_out = nullptr;
[51b7345]	147
[b87a5ed]	148	bool cpp_flag = false;
[2c60af75]	149	bool o_flag = false;
[51b7345]	150
[bbb1b35]	151	const char * args[argc + 100]; // leave space for 100 additional cpp command line values
[b87a5ed]	152	int nargs = 1; // number of arguments in args list; 0 => command name
[bdd516a]	153
[dffaeac]	154	#ifdef __DEBUG_H__
[7b937575]	155	cerr << "Stage1" << endl;
[dffaeac]	156	#endif // __DEBUG_H__
[2c60af75]	157	checkEnv1( args, nargs ); // arguments passed via environment variables
[bec4d24]	158	#ifdef __DEBUG_H__
	159	for ( int i = 1; i < argc; i += 1 ) {
	160	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
	161	} // for
	162	#endif // __DEBUG_H__
[7b937575]	163
[b87a5ed]	164	// process all the arguments
[51b7345]	165
[bec4d24]	166	for ( int i = 1; i < argc; i += 1 ) {
[b87a5ed]	167	arg = argv[i];
	168	if ( prefix( arg, "-" ) ) {
	169	// strip g++ flags that are inappropriate or cause duplicates in subsequent passes
	170
	171	if ( arg == "-quiet" ) {
	172	} else if ( arg == "-imultilib" \|\| arg == "-imultiarch" ) {
[db62eef]	173	i += 1; // and argument
[b87a5ed]	174	} else if ( prefix( arg, "-A" ) ) {
	175	} else if ( prefix( arg, "-D__GNU" ) ) {
	176	//********
	177	// GCC 5.6.0 SEPARATED THE -D FROM THE ARGUMENT!
	178	//********
	179	} else if ( arg == "-D" && prefix( argv[i + 1], "__GNU" ) ) {
[db62eef]	180	i += 1; // and argument
[b87a5ed]	181
	182	// strip flags controlling cpp step
	183
	184	} else if ( arg == "-D__CPP__" ) {
	185	cpp_flag = true;
	186	} else if ( arg == "-D" && string( argv[i + 1] ) == "__CPP__" ) {
[db62eef]	187	i += 1; // and argument
[b87a5ed]	188	cpp_flag = true;
	189
[2c60af75]	190	// all other flags
[b87a5ed]	191
	192	} else if ( arg == "-o" ) {
	193	i += 1;
[2c60af75]	194	o_flag = true;
	195	cpp_out = argv[i];
[b87a5ed]	196	} else {
[db62eef]	197	args[nargs++] = argv[i]; // pass flag along
[b87a5ed]	198	// CPP flags with an argument
[f8b6d921]	199	if ( arg == "-D" \|\| arg == "-U" \|\| arg == "-I" \|\| arg == "-MF" \|\| arg == "-MT" \|\| arg == "-MQ" \|\|
[b87a5ed]	200	arg == "-include" \|\| arg == "-imacros" \|\| arg == "-idirafter" \|\| arg == "-iprefix" \|\|
	201	arg == "-iwithprefix" \|\| arg == "-iwithprefixbefore" \|\| arg == "-isystem" \|\| arg == "-isysroot" ) {
	202	i += 1;
[db62eef]	203	args[nargs++] = argv[i]; // pass argument along
[dffaeac]	204	#ifdef __DEBUG_H__
[b87a5ed]	205	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
[dffaeac]	206	#endif // __DEBUG_H__
[b87a5ed]	207	} else if ( arg == "-MD" \|\| arg == "-MMD" ) {
[db62eef]	208	// gcc frontend generates the dependency file-name after the -MD/-MMD flag, but it is necessary to
	209	// prefix that file name with -MF.
[2c60af75]	210	args[nargs++] = "-MF"; // insert before file
[b87a5ed]	211	i += 1;
[db62eef]	212	args[nargs++] = argv[i]; // pass argument along
[dffaeac]	213	#ifdef __DEBUG_H__
[b87a5ed]	214	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
[dffaeac]	215	#endif // __DEBUG_H__
[b87a5ed]	216	} // if
	217	} // if
	218	} else { // obtain input and possibly output files
[bbb1b35]	219	if ( cpp_in == nullptr ) {
[b87a5ed]	220	cpp_in = argv[i];
[dffaeac]	221	#ifdef __DEBUG_H__
[b87a5ed]	222	cerr << "cpp_in:\"" << cpp_in << "\"" << endl;
[dffaeac]	223	#endif // __DEBUG_H__
[bbb1b35]	224	} else if ( cpp_out == nullptr ) {
[b87a5ed]	225	cpp_out = argv[i];
[dffaeac]	226	#ifdef __DEBUG_H__
[b87a5ed]	227	cerr << "cpp_out:\"" << cpp_out << "\""<< endl;
[dffaeac]	228	#endif // __DEBUG_H__
[b87a5ed]	229	} else {
	230	cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
	231	exit( EXIT_FAILURE );
	232	} // if
	233	} // if
	234	} // for
	235
[dffaeac]	236	#ifdef __DEBUG_H__
[b87a5ed]	237	cerr << "args:";
[bec4d24]	238	for ( int i = 1; i < nargs; i += 1 ) {
[b87a5ed]	239	cerr << " " << args[i];
	240	} // for
[bbb1b35]	241	if ( cpp_in != nullptr ) cerr << " " << cpp_in;
	242	if ( cpp_out != nullptr ) cerr << " " << cpp_out;
[b87a5ed]	243	cerr << endl;
[dffaeac]	244	#endif // __DEBUG_H__
[b87a5ed]	245
[bbb1b35]	246	if ( cpp_in == nullptr ) {
[51b7345]	247	cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
	248	exit( EXIT_FAILURE );
	249	} // if
[b87a5ed]	250
	251	if ( cpp_flag ) {
	252	// The -E flag is specified on the cfa command so only run the preprocessor and output is written to standard
	253	// output or -o. The call to cfa has a -E so it does not have to be added to the argument list.
	254
[2c60af75]	255	args[0] = compiler_path.c_str();
[0163d3e]	256	if ( lang.size() == 0 ) {
	257	suffix( cpp_in, args, nargs ); // check suffix
	258	} else {
	259	args[nargs++] = "-x";
	260	args[nargs++] = ( *new string( lang.c_str() ) ).c_str();
	261	} // if
[2c60af75]	262	args[nargs++] = cpp_in;
	263	if ( o_flag ) { // location for output
	264	args[nargs++] = "-o";
[b87a5ed]	265	} // if
[2c60af75]	266	args[nargs++] = cpp_out;
[bbb1b35]	267	args[nargs] = nullptr; // terminate argument list
[51b7345]	268
[dffaeac]	269	#ifdef __DEBUG_H__
[b87a5ed]	270	cerr << "nargs: " << nargs << endl;
[bbb1b35]	271	for ( int i = 0; args[i] != nullptr; i += 1 ) {
[b87a5ed]	272	cerr << args[i] << " ";
	273	} // for
	274	cerr << endl;
[dffaeac]	275	#endif // __DEBUG_H__
[51b7345]	276
[bbb1b35]	277	execvp( args[0], (char * const *)args ); // should not return
[2c60af75]	278	perror( "CC1 Translator error: stage 1, execvp" );
[b87a5ed]	279	exit( EXIT_FAILURE );
[51b7345]	280	} // if
	281
[2c60af75]	282	// Run the C preprocessor and save the output in the given file.
[51b7345]	283
[db62eef]	284	if ( fork() == 0 ) { // child process ?
[b87a5ed]	285	// -o xxx.ii cannot be used to write the output file from cpp because no output file is created if cpp detects
	286	// an error (e.g., cannot find include file). Whereas, output is always generated, even when there is an error,
	287	// when cpp writes to stdout. Hence, stdout is redirected into the temporary file.
[bbb1b35]	288	if ( freopen( cpp_out, "w", stdout ) == nullptr ) { // redirect stdout to output file
[2c60af75]	289	perror( "CC1 Translator error: stage 1, freopen" );
[b87a5ed]	290	exit( EXIT_FAILURE );
	291	} // if
[51b7345]	292
[2c60af75]	293	args[0] = compiler_path.c_str();
[0163d3e]	294	if ( lang.size() == 0 ) {
	295	suffix( cpp_in, args, nargs ); // check suffix
	296	} else {
	297	args[nargs++] = "-x";
	298	args[nargs++] = ( *new string( lang.c_str() ) ).c_str();
	299	} // if
[2c60af75]	300	args[nargs++] = cpp_in; // input to cpp
[bbb1b35]	301	args[nargs] = nullptr; // terminate argument list
[51b7345]	302
[dffaeac]	303	#ifdef __DEBUG_H__
[b87a5ed]	304	cerr << "cpp nargs: " << nargs << endl;
[bbb1b35]	305	for ( int i = 0; args[i] != nullptr; i += 1 ) {
[b87a5ed]	306	cerr << args[i] << " ";
	307	} // for
	308	cerr << endl;
[dffaeac]	309	#endif // __DEBUG_H__
[51b7345]	310
[bbb1b35]	311	execvp( args[0], (char * const *)args ); // should not return
[5a43ab8]	312	perror( "CC1 Translator error: stage 1 cpp, execvp" );
	313	cerr << " invoked " << args[0] << endl;
[b87a5ed]	314	exit( EXIT_FAILURE );
[51b7345]	315	} // if
	316
[b87a5ed]	317	wait( &code ); // wait for child to finish
[51b7345]	318
[dffaeac]	319	#ifdef __DEBUG_H__
[b87a5ed]	320	cerr << "return code from cpp:" << WEXITSTATUS(code) << endl;
[dffaeac]	321	#endif // __DEBUG_H__
[51b7345]	322
[b87a5ed]	323	if ( WIFSIGNALED(code) ) { // child failed ?
[36de20d]	324	rmtmpfile(); // remove tmpname
[2c60af75]	325	cerr << "CC1 Translator error: stage 1, child failed " << WTERMSIG(code) << endl;
[b87a5ed]	326	exit( EXIT_FAILURE );
	327	} // if
[51b7345]	328
[36de20d]	329	exit( WEXITSTATUS( code ) ); // bad cpp result stops top-level gcc
[51b7345]	330	} // Stage1
	331
	332
[2c60af75]	333	static void Stage2( const int argc, const char * const * argv ) {
	334	int code;
[b87a5ed]	335	string arg;
[51b7345]	336
[bbb1b35]	337	const char * cpp_in = nullptr;
	338	const char * cpp_out = nullptr;
[51b7345]	339
[bbb1b35]	340	const char * args[argc + 100]; // leave space for 100 additional cfa command line values
[b87a5ed]	341	int nargs = 1; // number of arguments in args list; 0 => command name
[bbb1b35]	342	const char * cargs[20]; // leave space for 20 additional cfa-cpp command line values
[2c60af75]	343	int ncargs = 1; // 0 => command name
[51b7345]	344
[dffaeac]	345	#ifdef __DEBUG_H__
[7b937575]	346	cerr << "Stage2" << endl;
[dffaeac]	347	#endif // __DEBUG_H__
[2c60af75]	348	checkEnv2( cargs, ncargs ); // arguments passed via environment variables
[bec4d24]	349	#ifdef __DEBUG_H__
	350	for ( int i = 1; i < argc; i += 1 ) {
	351	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
	352	} // for
	353	#endif // __DEBUG_H__
[7b937575]	354
[49d3128]	355	enum {
	356	Color_Auto = 0,
	357	Color_Always = 1,
	358	Color_Never = 2,
	359	} color_arg = Color_Auto;
	360
	361	const char * color_names[3] = { "--colors=auto", "--colors=always", "--colors=never" };
	362
[b87a5ed]	363	// process all the arguments
[51b7345]	364
[bec4d24]	365	for ( int i = 1; i < argc; i += 1 ) {
[b87a5ed]	366	arg = argv[i];
	367	if ( prefix( arg, "-" ) ) {
	368	// strip inappropriate flags
[51b7345]	369
[49d3128]	370	if ( prefix( arg, "-fdiagnostics-color=" ) ) {
	371	string choice = arg.substr(20);
	372	if(choice == "always") color_arg = Color_Always;
	373	else if(choice == "never" ) color_arg = Color_Never;
	374	else if(choice == "auto" ) color_arg = Color_Auto;
	375	} else if ( arg == "-fno-diagnostics-color" ) {
	376	color_arg = Color_Auto;
[36de20d]	377	} // if
[49d3128]	378
[b87a5ed]	379	if ( arg == "-quiet" \|\| arg == "-version" \|\| arg == "-fpreprocessed" \|\|
[36de20d]	380	// Currently CFA does not suppose precompiled .h files.
	381	prefix( arg, "--output-pch" ) ) {
[51b7345]	382
[b87a5ed]	383	// strip inappropriate flags with an argument
[51b7345]	384
[b87a5ed]	385	} else if ( arg == "-auxbase" \|\| arg == "-auxbase-strip" \|\| arg == "-dumpbase" ) {
	386	i += 1;
[dffaeac]	387	#ifdef __DEBUG_H__
[b87a5ed]	388	cerr << "arg:\"" << argv[i] << "\"" << endl;
[dffaeac]	389	#endif // __DEBUG_H__
[51b7345]	390
[b87a5ed]	391	// all other flags
[51b7345]	392
[b87a5ed]	393	} else {
[db62eef]	394	args[nargs++] = argv[i]; // pass flag along
[b87a5ed]	395	if ( arg == "-o" ) {
	396	i += 1;
[2c60af75]	397	cpp_out = argv[i];
[db62eef]	398	args[nargs++] = argv[i]; // pass argument along
[68bceeb]	399	#ifdef __DEBUG_H__
[b87a5ed]	400	cerr << "arg:\"" << argv[i] << "\"" << endl;
[68bceeb]	401	#endif // __DEBUG_H__
[b87a5ed]	402	} // if
	403	} // if
	404	} else { // obtain input and possibly output files
[bbb1b35]	405	if ( cpp_in == nullptr ) {
[b87a5ed]	406	cpp_in = argv[i];
[dffaeac]	407	#ifdef __DEBUG_H__
[b87a5ed]	408	cerr << "cpp_in:\"" << cpp_in << "\"" << endl;
[dffaeac]	409	#endif // __DEBUG_H__
[bbb1b35]	410	} else if ( cpp_out == nullptr ) {
[2c60af75]	411	cpp_out = argv[i];
	412	#ifdef __DEBUG_H__
	413	cerr << "cpp_out:\"" << cpp_out << "\""<< endl;
	414	#endif // __DEBUG_H__
[b87a5ed]	415	} else {
[bbb1b35]	416	cerr << "Usage: " << argv[0] << " more than two files specified" << endl;
[b87a5ed]	417	exit( EXIT_FAILURE );
	418	} // if
	419	} // if
	420	} // for
[51b7345]	421
[bbb1b35]	422	if ( cpp_in == nullptr ) {
	423	cerr << "Usage: " << argv[0] << " missing input file" << endl;
	424	exit( EXIT_FAILURE );
	425	} // if
	426	if ( cpp_out == nullptr ) {
	427	cerr << "Usage: " << argv[0] << " missing output file" << endl;
	428	exit( EXIT_FAILURE );
	429	} // if
	430
[2c60af75]	431	// Create a temporary file, if needed, to store output of the cfa-cpp preprocessor. Cannot be created in forked
	432	// process because variables tmpname and tmpfilefd are cloned.
	433
[bbb1b35]	434	string cfa_cpp_out;
	435
	436	if ( ! CFA_flag ) { // run compiler ?
	437	if ( save_temps ) {
	438	cfa_cpp_out = cpp_in;
	439	size_t dot = cfa_cpp_out.find_last_of( "." );
	440	if ( dot == string::npos ) {
	441	cerr << "CC1 Translator error: stage 2, bad file name " << endl;
	442	exit( EXIT_FAILURE );
	443	} // if
[2c60af75]	444
[36de20d]	445	cfa_cpp_out = cfa_cpp_out.substr( 0, dot ) + CFA_SUFFIX;
[bbb1b35]	446	if ( creat( cfa_cpp_out.c_str(), 0666 ) == -1 ) {
	447	perror( "CC1 Translator error: stage 2, creat" );
	448	exit( EXIT_FAILURE );
	449	} // if
	450	} else {
[0bf5340]	451	tmpfilefd = mkstemps( tmpname, 4 );
[bbb1b35]	452	if ( tmpfilefd == -1 ) {
	453	perror( "CC1 Translator error: stage 2, mkstemp" );
	454	exit( EXIT_FAILURE );
	455	} // if
	456	cfa_cpp_out = tmpname;
	457	} // if
[2c60af75]	458	#ifdef __DEBUG_H__
[bbb1b35]	459	cerr << "cfa_cpp_out: " << cfa_cpp_out << endl;
[2c60af75]	460	#endif // __DEBUG_H__
	461	} // if
	462
	463	// If -CFA flag specified, run the cfa-cpp preprocessor on the temporary file, and output is written to standard
	464	// output. Otherwise, run the cfa-cpp preprocessor on the temporary file and save the result into the output file.
	465
[36de20d]	466	if ( fork() == 0 ) { // child runs CFA preprocessor
[7c8246d]	467	cargs[0] = ( *new string( bprefix + "cfa-cpp" ) ).c_str();
[2c60af75]	468	cargs[ncargs++] = cpp_in;
	469
	470	if ( CFA_flag ) { // run cfa-cpp ?
	471	if ( o_file.size() != 0 ) { // location for output
	472	cargs[ncargs++] = ( *new string( o_file.c_str() ) ).c_str();
	473	} // if
	474	} else {
[bbb1b35]	475	cargs[ncargs++] = cfa_cpp_out.c_str();
[2c60af75]	476	} // if
[49d3128]	477
	478	cargs[ncargs++] = color_names[color_arg];
	479
[5a43ab8]	480	cargs[ncargs] = nullptr; // terminate argument list
[2c60af75]	481
	482	#ifdef __DEBUG_H__
[bbb1b35]	483	for ( int i = 0; cargs[i] != nullptr; i += 1 ) {
[2c60af75]	484	cerr << cargs[i] << " ";
	485	} // for
	486	cerr << endl;
	487	#endif // __DEBUG_H__
	488
	489	execvp( cargs[0], (char * const *)cargs ); // should not return
[5a43ab8]	490	perror( "CC1 Translator error: stage 2 cfa-cpp, execvp" );
	491	cerr << " invoked " << cargs[0] << endl;
[2c60af75]	492	exit( EXIT_FAILURE );
	493	} // if
	494
	495	wait( &code ); // wait for child to finish
	496
	497	if ( WIFSIGNALED(code) ) { // child failed ?
	498	rmtmpfile(); // remove tmpname
	499	cerr << "CC1 Translator error: stage 2, child failed " << WTERMSIG(code) << endl;
	500	exit( EXIT_FAILURE );
	501	} // if
	502
	503	if ( CFA_flag ) { // no tmpfile created
	504	exit( WEXITSTATUS( code ) ); // stop regardless of success or failure
	505	} // if
	506
	507	#ifdef __DEBUG_H__
	508	cerr << "return code from cfa-cpp:" << WEXITSTATUS(code) << endl;
	509	#endif // __DEBUG_H__
	510
	511	if ( WEXITSTATUS(code) ) { // child error ?
	512	rmtmpfile(); // remove tmpname
	513	exit( WEXITSTATUS( code ) ); // do not continue
	514	} // if
	515
[dffaeac]	516	#ifdef __DEBUG_H__
[b87a5ed]	517	cerr << "args:";
[bec4d24]	518	for ( int i = 1; i < nargs; i += 1 ) {
[b87a5ed]	519	cerr << " " << args[i];
	520	} // for
[bbb1b35]	521	cerr << " " << cpp_in << endl;
[dffaeac]	522	#endif // __DEBUG_H__
[51b7345]	523
[36de20d]	524	if ( fork() == 0 ) { // child runs gcc
[2c60af75]	525	args[0] = compiler_path.c_str();
	526	args[nargs++] = "-S"; // only compile and put assembler output in specified file
[0bf5340]	527	args[nargs++] = "-x";
	528	args[nargs++] = "cpp-output";
	529
[bbb1b35]	530	args[nargs++] = cfa_cpp_out.c_str();
	531	args[nargs] = nullptr; // terminate argument list
[2c60af75]	532
	533	#ifdef __DEBUG_H__
	534	cerr << "stage2 nargs: " << nargs << endl;
[bbb1b35]	535	for ( int i = 0; args[i] != nullptr; i += 1 ) {
[2c60af75]	536	cerr << args[i] << " ";
	537	} // for
	538	cerr << endl;
	539	#endif // __DEBUG_H__
	540
	541	execvp( args[0], (char * const *)args ); // should not return
[5a43ab8]	542	perror( "CC1 Translator error: stage 2 cc1, execvp" );
[c5c0148]	543	cerr << " invoked " << args[0] << endl;
[2c60af75]	544	exit( EXIT_FAILURE ); // tell gcc not to go any further
	545	} // if
	546
	547	wait( &code ); // wait for child to finish
[0bf5340]	548	rmtmpfile(); // remove tmpname
[2c60af75]	549
	550	if ( WIFSIGNALED(code) ) { // child failed ?
	551	cerr << "CC1 Translator error: stage 2, child failed " << WTERMSIG(code) << endl;
	552	exit( EXIT_FAILURE );
	553	} // if
[51b7345]	554
[dffaeac]	555	#ifdef __DEBUG_H__
[2c60af75]	556	cerr << "return code from gcc cc1:" << WEXITSTATUS(code) << endl;
[dffaeac]	557	#endif // __DEBUG_H__
[51b7345]	558
[2c60af75]	559	exit( WEXITSTATUS( code ) ); // stop regardless of success or failure
[51b7345]	560	} // Stage2
	561
	562
[2c60af75]	563	// This program is called twice because of the -no-integrated-cpp. The calls are differentiated by the first
	564	// command-line argument. The first call replaces the traditional cpp pass to preprocess the C program. The second call
	565	// is to the compiler, which is broken into two steps: preprocess again with cfa-cpp and then call gcc to compile the
	566	// doubly preprocessed program.
	567
[b3c36f4]	568	int main( const int argc, const char * const argv[], __attribute__((unused)) const char * const env[] ) {
[dffaeac]	569	#ifdef __DEBUG_H__
[bbb1b35]	570	for ( int i = 0; env[i] != nullptr; i += 1 ) {
[b87a5ed]	571	cerr << env[i] << endl;
	572	} // for
[dffaeac]	573	#endif // __DEBUG_H__
[51b7345]	574
[2c60af75]	575	signal( SIGINT, sigTermHandler );
	576	signal( SIGTERM, sigTermHandler );
	577
[bbb1b35]	578	string arg( argv[1] );
[51b7345]	579
[b87a5ed]	580	// Currently, stage 1 starts with flag -E and stage 2 with flag -fpreprocessed.
[51b7345]	581
[b87a5ed]	582	if ( arg == "-E" ) {
	583	Stage1( argc, argv );
	584	} else if ( arg == "-fpreprocessed" ) {
	585	Stage2( argc, argv );
	586	} else {
	587	cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
	588	exit( EXIT_FAILURE );
	589	} // if
[51b7345]	590	} // main
	591
	592	// Local Variables: //
[b87a5ed]	593	// tab-width: 4 //
	594	// mode: c++ //
[51b7345]	595	// compile-command: "make install" //
	596	// End: //

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