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Last change on this file since 9082d7e8 was d43a1fe, checked in by Peter A. Buhr <pabuhr@…>, 4 years ago
remove unused parameters from checkEnv1 to remove warnings
Property mode set to `100644`
File size: 18.4 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
[d43a1fe]	12	// Last Modified On : Thu Feb 17 18:04:23 2022
	13	// Update Count : 422
[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
[36de20d]	26	#include <fcntl.h> // creat
[bbb1b35]	27
[51b73452]	28
[b87a5ed]	29	#include "config.h" // configure info
[51b73452]	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
[51b73452]	41
[bbb1b35]	42
[2c60af75]	43	static bool prefix( const string & arg, const string & pre ) {
[b87a5ed]	44	return arg.substr( 0, pre.size() ) == pre;
[51b73452]	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
[51b73452]	60
[36de20d]	61	static string __CFA_FLAGPREFIX__( "__CFA_FLAG" ); // "__CFA_FLAG__=" suffix
[51b73452]	62
[d43a1fe]	63	static void checkEnv1() { // stage 1
[2c60af75]	64	extern char ** environ;
[51b73452]	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__
[51b73452]	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
[51b73452]	112
[36de20d]	113	#define CFA_SUFFIX ".ifa"
[51b73452]	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;
[51b73452]	144
[bbb1b35]	145	const char * cpp_in = nullptr;
	146	const char * cpp_out = nullptr;
[51b73452]	147
[b87a5ed]	148	bool cpp_flag = false;
[2c60af75]	149	bool o_flag = false;
[51b73452]	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__
[d43a1fe]	157	checkEnv1(); // 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
[51b73452]	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" \|\|
[6da81c7]	201	arg == "-iwithprefix" \|\| arg == "-iwithprefixbefore" \|\| arg == "-isystem" \|\| arg == "-isysroot" \|\|
	202	arg == "-dumpbase-ext" \|\| arg == "-dumpbase"
	203	) {
[b87a5ed]	204	i += 1;
[db62eef]	205	args[nargs++] = argv[i]; // pass argument along
[dffaeac]	206	#ifdef __DEBUG_H__
[b87a5ed]	207	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
[dffaeac]	208	#endif // __DEBUG_H__
[b87a5ed]	209	} else if ( arg == "-MD" \|\| arg == "-MMD" ) {
[db62eef]	210	// gcc frontend generates the dependency file-name after the -MD/-MMD flag, but it is necessary to
	211	// prefix that file name with -MF.
[2c60af75]	212	args[nargs++] = "-MF"; // insert before file
[b87a5ed]	213	i += 1;
[db62eef]	214	args[nargs++] = argv[i]; // pass argument along
[dffaeac]	215	#ifdef __DEBUG_H__
[b87a5ed]	216	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
[dffaeac]	217	#endif // __DEBUG_H__
[b87a5ed]	218	} // if
	219	} // if
	220	} else { // obtain input and possibly output files
[bbb1b35]	221	if ( cpp_in == nullptr ) {
[b87a5ed]	222	cpp_in = argv[i];
[dffaeac]	223	#ifdef __DEBUG_H__
[b87a5ed]	224	cerr << "cpp_in:\"" << cpp_in << "\"" << endl;
[dffaeac]	225	#endif // __DEBUG_H__
[bbb1b35]	226	} else if ( cpp_out == nullptr ) {
[b87a5ed]	227	cpp_out = argv[i];
[dffaeac]	228	#ifdef __DEBUG_H__
[b87a5ed]	229	cerr << "cpp_out:\"" << cpp_out << "\""<< endl;
[dffaeac]	230	#endif // __DEBUG_H__
[b87a5ed]	231	} else {
	232	cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
	233	exit( EXIT_FAILURE );
	234	} // if
	235	} // if
	236	} // for
	237
[dffaeac]	238	#ifdef __DEBUG_H__
[b87a5ed]	239	cerr << "args:";
[bec4d24]	240	for ( int i = 1; i < nargs; i += 1 ) {
[b87a5ed]	241	cerr << " " << args[i];
	242	} // for
[bbb1b35]	243	if ( cpp_in != nullptr ) cerr << " " << cpp_in;
	244	if ( cpp_out != nullptr ) cerr << " " << cpp_out;
[b87a5ed]	245	cerr << endl;
[dffaeac]	246	#endif // __DEBUG_H__
[b87a5ed]	247
[bbb1b35]	248	if ( cpp_in == nullptr ) {
[51b73452]	249	cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl;
	250	exit( EXIT_FAILURE );
	251	} // if
[b87a5ed]	252
	253	if ( cpp_flag ) {
	254	// The -E flag is specified on the cfa command so only run the preprocessor and output is written to standard
	255	// output or -o. The call to cfa has a -E so it does not have to be added to the argument list.
	256
[2c60af75]	257	args[0] = compiler_path.c_str();
[0163d3e]	258	if ( lang.size() == 0 ) {
	259	suffix( cpp_in, args, nargs ); // check suffix
	260	} else {
	261	args[nargs++] = "-x";
	262	args[nargs++] = ( *new string( lang.c_str() ) ).c_str();
	263	} // if
[2c60af75]	264	args[nargs++] = cpp_in;
	265	if ( o_flag ) { // location for output
	266	args[nargs++] = "-o";
[b87a5ed]	267	} // if
[2c60af75]	268	args[nargs++] = cpp_out;
[bbb1b35]	269	args[nargs] = nullptr; // terminate argument list
[51b73452]	270
[dffaeac]	271	#ifdef __DEBUG_H__
[b87a5ed]	272	cerr << "nargs: " << nargs << endl;
[bbb1b35]	273	for ( int i = 0; args[i] != nullptr; i += 1 ) {
[b87a5ed]	274	cerr << args[i] << " ";
	275	} // for
	276	cerr << endl;
[dffaeac]	277	#endif // __DEBUG_H__
[51b73452]	278
[bbb1b35]	279	execvp( args[0], (char * const *)args ); // should not return
[2c60af75]	280	perror( "CC1 Translator error: stage 1, execvp" );
[b87a5ed]	281	exit( EXIT_FAILURE );
[51b73452]	282	} // if
	283
[2c60af75]	284	// Run the C preprocessor and save the output in the given file.
[51b73452]	285
[db62eef]	286	if ( fork() == 0 ) { // child process ?
[b87a5ed]	287	// -o xxx.ii cannot be used to write the output file from cpp because no output file is created if cpp detects
	288	// an error (e.g., cannot find include file). Whereas, output is always generated, even when there is an error,
	289	// when cpp writes to stdout. Hence, stdout is redirected into the temporary file.
[bbb1b35]	290	if ( freopen( cpp_out, "w", stdout ) == nullptr ) { // redirect stdout to output file
[2c60af75]	291	perror( "CC1 Translator error: stage 1, freopen" );
[b87a5ed]	292	exit( EXIT_FAILURE );
	293	} // if
[51b73452]	294
[2c60af75]	295	args[0] = compiler_path.c_str();
[0163d3e]	296	if ( lang.size() == 0 ) {
	297	suffix( cpp_in, args, nargs ); // check suffix
	298	} else {
	299	args[nargs++] = "-x";
	300	args[nargs++] = ( *new string( lang.c_str() ) ).c_str();
	301	} // if
[2c60af75]	302	args[nargs++] = cpp_in; // input to cpp
[bbb1b35]	303	args[nargs] = nullptr; // terminate argument list
[51b73452]	304
[dffaeac]	305	#ifdef __DEBUG_H__
[b87a5ed]	306	cerr << "cpp nargs: " << nargs << endl;
[bbb1b35]	307	for ( int i = 0; args[i] != nullptr; i += 1 ) {
[b87a5ed]	308	cerr << args[i] << " ";
	309	} // for
	310	cerr << endl;
[dffaeac]	311	#endif // __DEBUG_H__
[51b73452]	312
[bbb1b35]	313	execvp( args[0], (char * const *)args ); // should not return
[5a43ab8]	314	perror( "CC1 Translator error: stage 1 cpp, execvp" );
	315	cerr << " invoked " << args[0] << endl;
[b87a5ed]	316	exit( EXIT_FAILURE );
[51b73452]	317	} // if
	318
[b87a5ed]	319	wait( &code ); // wait for child to finish
[51b73452]	320
[dffaeac]	321	#ifdef __DEBUG_H__
[b87a5ed]	322	cerr << "return code from cpp:" << WEXITSTATUS(code) << endl;
[dffaeac]	323	#endif // __DEBUG_H__
[51b73452]	324
[b87a5ed]	325	if ( WIFSIGNALED(code) ) { // child failed ?
[36de20d]	326	rmtmpfile(); // remove tmpname
[2c60af75]	327	cerr << "CC1 Translator error: stage 1, child failed " << WTERMSIG(code) << endl;
[b87a5ed]	328	exit( EXIT_FAILURE );
	329	} // if
[51b73452]	330
[36de20d]	331	exit( WEXITSTATUS( code ) ); // bad cpp result stops top-level gcc
[51b73452]	332	} // Stage1
	333
	334
[2c60af75]	335	static void Stage2( const int argc, const char * const * argv ) {
	336	int code;
[b87a5ed]	337	string arg;
[51b73452]	338
[bbb1b35]	339	const char * cpp_in = nullptr;
	340	const char * cpp_out = nullptr;
[51b73452]	341
[bbb1b35]	342	const char * args[argc + 100]; // leave space for 100 additional cfa command line values
[b87a5ed]	343	int nargs = 1; // number of arguments in args list; 0 => command name
[bbb1b35]	344	const char * cargs[20]; // leave space for 20 additional cfa-cpp command line values
[2c60af75]	345	int ncargs = 1; // 0 => command name
[51b73452]	346
[dffaeac]	347	#ifdef __DEBUG_H__
[7b937575]	348	cerr << "Stage2" << endl;
[dffaeac]	349	#endif // __DEBUG_H__
[2c60af75]	350	checkEnv2( cargs, ncargs ); // arguments passed via environment variables
[bec4d24]	351	#ifdef __DEBUG_H__
	352	for ( int i = 1; i < argc; i += 1 ) {
	353	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
	354	} // for
	355	#endif // __DEBUG_H__
[7b937575]	356
[49d3128]	357	enum {
	358	Color_Auto = 0,
	359	Color_Always = 1,
	360	Color_Never = 2,
	361	} color_arg = Color_Auto;
	362
	363	const char * color_names[3] = { "--colors=auto", "--colors=always", "--colors=never" };
	364
[b87a5ed]	365	// process all the arguments
[51b73452]	366
[bec4d24]	367	for ( int i = 1; i < argc; i += 1 ) {
[b87a5ed]	368	arg = argv[i];
	369	if ( prefix( arg, "-" ) ) {
	370	// strip inappropriate flags
[51b73452]	371
[49d3128]	372	if ( prefix( arg, "-fdiagnostics-color=" ) ) {
	373	string choice = arg.substr(20);
[e7a63e3]	374	if ( choice == "always" ) color_arg = Color_Always;
	375	else if ( choice == "never" ) color_arg = Color_Never;
	376	else if ( choice == "auto" ) color_arg = Color_Auto;
[49d3128]	377	} else if ( arg == "-fno-diagnostics-color" ) {
	378	color_arg = Color_Auto;
[36de20d]	379	} // if
[49d3128]	380
[b87a5ed]	381	if ( arg == "-quiet" \|\| arg == "-version" \|\| arg == "-fpreprocessed" \|\|
[36de20d]	382	// Currently CFA does not suppose precompiled .h files.
	383	prefix( arg, "--output-pch" ) ) {
[51b73452]	384
[b87a5ed]	385	// strip inappropriate flags with an argument
[51b73452]	386
[a804f81]	387	} else if ( arg == "-auxbase" \|\| arg == "-auxbase-strip" \|\| arg == "-dumpbase" \|\| arg == "-dumpdir" ) {
[b87a5ed]	388	i += 1;
[dffaeac]	389	#ifdef __DEBUG_H__
[b87a5ed]	390	cerr << "arg:\"" << argv[i] << "\"" << endl;
[dffaeac]	391	#endif // __DEBUG_H__
[51b73452]	392
[b87a5ed]	393	// all other flags
[51b73452]	394
[b87a5ed]	395	} else {
[db62eef]	396	args[nargs++] = argv[i]; // pass flag along
[b87a5ed]	397	if ( arg == "-o" ) {
	398	i += 1;
[2c60af75]	399	cpp_out = argv[i];
[db62eef]	400	args[nargs++] = argv[i]; // pass argument along
[68bceeb]	401	#ifdef __DEBUG_H__
[b87a5ed]	402	cerr << "arg:\"" << argv[i] << "\"" << endl;
[68bceeb]	403	#endif // __DEBUG_H__
[b87a5ed]	404	} // if
	405	} // if
	406	} else { // obtain input and possibly output files
[bbb1b35]	407	if ( cpp_in == nullptr ) {
[b87a5ed]	408	cpp_in = argv[i];
[dffaeac]	409	#ifdef __DEBUG_H__
[b87a5ed]	410	cerr << "cpp_in:\"" << cpp_in << "\"" << endl;
[dffaeac]	411	#endif // __DEBUG_H__
[bbb1b35]	412	} else if ( cpp_out == nullptr ) {
[2c60af75]	413	cpp_out = argv[i];
	414	#ifdef __DEBUG_H__
	415	cerr << "cpp_out:\"" << cpp_out << "\""<< endl;
	416	#endif // __DEBUG_H__
[b87a5ed]	417	} else {
[bbb1b35]	418	cerr << "Usage: " << argv[0] << " more than two files specified" << endl;
[b87a5ed]	419	exit( EXIT_FAILURE );
	420	} // if
	421	} // if
	422	} // for
[51b73452]	423
[bbb1b35]	424	if ( cpp_in == nullptr ) {
	425	cerr << "Usage: " << argv[0] << " missing input file" << endl;
	426	exit( EXIT_FAILURE );
	427	} // if
	428	if ( cpp_out == nullptr ) {
	429	cerr << "Usage: " << argv[0] << " missing output file" << endl;
	430	exit( EXIT_FAILURE );
	431	} // if
	432
[2c60af75]	433	// Create a temporary file, if needed, to store output of the cfa-cpp preprocessor. Cannot be created in forked
	434	// process because variables tmpname and tmpfilefd are cloned.
	435
[bbb1b35]	436	string cfa_cpp_out;
	437
	438	if ( ! CFA_flag ) { // run compiler ?
	439	if ( save_temps ) {
	440	cfa_cpp_out = cpp_in;
	441	size_t dot = cfa_cpp_out.find_last_of( "." );
	442	if ( dot == string::npos ) {
	443	cerr << "CC1 Translator error: stage 2, bad file name " << endl;
	444	exit( EXIT_FAILURE );
	445	} // if
[2c60af75]	446
[36de20d]	447	cfa_cpp_out = cfa_cpp_out.substr( 0, dot ) + CFA_SUFFIX;
[bbb1b35]	448	if ( creat( cfa_cpp_out.c_str(), 0666 ) == -1 ) {
	449	perror( "CC1 Translator error: stage 2, creat" );
	450	exit( EXIT_FAILURE );
	451	} // if
	452	} else {
[0bf5340]	453	tmpfilefd = mkstemps( tmpname, 4 );
[bbb1b35]	454	if ( tmpfilefd == -1 ) {
	455	perror( "CC1 Translator error: stage 2, mkstemp" );
	456	exit( EXIT_FAILURE );
	457	} // if
	458	cfa_cpp_out = tmpname;
	459	} // if
[2c60af75]	460	#ifdef __DEBUG_H__
[bbb1b35]	461	cerr << "cfa_cpp_out: " << cfa_cpp_out << endl;
[2c60af75]	462	#endif // __DEBUG_H__
	463	} // if
	464
	465	// If -CFA flag specified, run the cfa-cpp preprocessor on the temporary file, and output is written to standard
	466	// output. Otherwise, run the cfa-cpp preprocessor on the temporary file and save the result into the output file.
	467
[36de20d]	468	if ( fork() == 0 ) { // child runs CFA preprocessor
[7c8246d]	469	cargs[0] = ( *new string( bprefix + "cfa-cpp" ) ).c_str();
[2c60af75]	470	cargs[ncargs++] = cpp_in;
	471
	472	if ( CFA_flag ) { // run cfa-cpp ?
	473	if ( o_file.size() != 0 ) { // location for output
	474	cargs[ncargs++] = ( *new string( o_file.c_str() ) ).c_str();
	475	} // if
	476	} else {
[bbb1b35]	477	cargs[ncargs++] = cfa_cpp_out.c_str();
[2c60af75]	478	} // if
[49d3128]	479
	480	cargs[ncargs++] = color_names[color_arg];
	481
[5a43ab8]	482	cargs[ncargs] = nullptr; // terminate argument list
[2c60af75]	483
	484	#ifdef __DEBUG_H__
[bbb1b35]	485	for ( int i = 0; cargs[i] != nullptr; i += 1 ) {
[2c60af75]	486	cerr << cargs[i] << " ";
	487	} // for
	488	cerr << endl;
	489	#endif // __DEBUG_H__
	490
	491	execvp( cargs[0], (char * const *)cargs ); // should not return
[5a43ab8]	492	perror( "CC1 Translator error: stage 2 cfa-cpp, execvp" );
	493	cerr << " invoked " << cargs[0] << endl;
[2c60af75]	494	exit( EXIT_FAILURE );
	495	} // if
	496
	497	wait( &code ); // wait for child to finish
	498
	499	if ( WIFSIGNALED(code) ) { // child failed ?
	500	rmtmpfile(); // remove tmpname
	501	cerr << "CC1 Translator error: stage 2, child failed " << WTERMSIG(code) << endl;
	502	exit( EXIT_FAILURE );
	503	} // if
	504
	505	if ( CFA_flag ) { // no tmpfile created
	506	exit( WEXITSTATUS( code ) ); // stop regardless of success or failure
	507	} // if
	508
	509	#ifdef __DEBUG_H__
	510	cerr << "return code from cfa-cpp:" << WEXITSTATUS(code) << endl;
	511	#endif // __DEBUG_H__
	512
	513	if ( WEXITSTATUS(code) ) { // child error ?
	514	rmtmpfile(); // remove tmpname
	515	exit( WEXITSTATUS( code ) ); // do not continue
	516	} // if
	517
[dffaeac]	518	#ifdef __DEBUG_H__
[b87a5ed]	519	cerr << "args:";
[bec4d24]	520	for ( int i = 1; i < nargs; i += 1 ) {
[b87a5ed]	521	cerr << " " << args[i];
	522	} // for
[bbb1b35]	523	cerr << " " << cpp_in << endl;
[dffaeac]	524	#endif // __DEBUG_H__
[51b73452]	525
[36de20d]	526	if ( fork() == 0 ) { // child runs gcc
[2c60af75]	527	args[0] = compiler_path.c_str();
	528	args[nargs++] = "-S"; // only compile and put assembler output in specified file
[0bf5340]	529	args[nargs++] = "-x";
	530	args[nargs++] = "cpp-output";
	531
[bbb1b35]	532	args[nargs++] = cfa_cpp_out.c_str();
	533	args[nargs] = nullptr; // terminate argument list
[2c60af75]	534
	535	#ifdef __DEBUG_H__
	536	cerr << "stage2 nargs: " << nargs << endl;
[bbb1b35]	537	for ( int i = 0; args[i] != nullptr; i += 1 ) {
[2c60af75]	538	cerr << args[i] << " ";
	539	} // for
	540	cerr << endl;
	541	#endif // __DEBUG_H__
	542
	543	execvp( args[0], (char * const *)args ); // should not return
[5a43ab8]	544	perror( "CC1 Translator error: stage 2 cc1, execvp" );
[c5c0148]	545	cerr << " invoked " << args[0] << endl;
[2c60af75]	546	exit( EXIT_FAILURE ); // tell gcc not to go any further
	547	} // if
	548
	549	wait( &code ); // wait for child to finish
[0bf5340]	550	rmtmpfile(); // remove tmpname
[2c60af75]	551
	552	if ( WIFSIGNALED(code) ) { // child failed ?
	553	cerr << "CC1 Translator error: stage 2, child failed " << WTERMSIG(code) << endl;
	554	exit( EXIT_FAILURE );
	555	} // if
[51b73452]	556
[dffaeac]	557	#ifdef __DEBUG_H__
[2c60af75]	558	cerr << "return code from gcc cc1:" << WEXITSTATUS(code) << endl;
[dffaeac]	559	#endif // __DEBUG_H__
[51b73452]	560
[2c60af75]	561	exit( WEXITSTATUS( code ) ); // stop regardless of success or failure
[51b73452]	562	} // Stage2
	563
	564
[2c60af75]	565	// This program is called twice because of the -no-integrated-cpp. The calls are differentiated by the first
	566	// command-line argument. The first call replaces the traditional cpp pass to preprocess the C program. The second call
	567	// is to the compiler, which is broken into two steps: preprocess again with cfa-cpp and then call gcc to compile the
	568	// doubly preprocessed program.
	569
[b3c36f4]	570	int main( const int argc, const char * const argv[], __attribute__((unused)) const char * const env[] ) {
[dffaeac]	571	#ifdef __DEBUG_H__
[bbb1b35]	572	for ( int i = 0; env[i] != nullptr; i += 1 ) {
[b87a5ed]	573	cerr << env[i] << endl;
	574	} // for
[dffaeac]	575	#endif // __DEBUG_H__
[51b73452]	576
[2c60af75]	577	signal( SIGINT, sigTermHandler );
	578	signal( SIGTERM, sigTermHandler );
	579
[bbb1b35]	580	string arg( argv[1] );
[51b73452]	581
[b87a5ed]	582	// Currently, stage 1 starts with flag -E and stage 2 with flag -fpreprocessed.
[51b73452]	583
[b87a5ed]	584	if ( arg == "-E" ) {
	585	Stage1( argc, argv );
	586	} else if ( arg == "-fpreprocessed" ) {
	587	Stage2( argc, argv );
	588	} else {
[bf5eeb2]	589	cerr << "Usage: " << argv[0] << " [-E input-file [output-file] ] \| [-fpreprocessed input-file output-file] [options]" << endl;
[b87a5ed]	590	exit( EXIT_FAILURE );
	591	} // if
[51b73452]	592	} // main
	593
	594	// Local Variables: //
[b87a5ed]	595	// tab-width: 4 //
	596	// mode: c++ //
[51b73452]	597	// compile-command: "make install" //
	598	// End: //

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