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source: driver/cfa.cc @ ded018f

Last change on this file since ded018f was 727c39d5, checked in by Peter A. Buhr <pabuhr@…>, 13 months ago
add commented alternative option for ARM atomics
Property mode set to `100644`
File size: 20.5 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	//
[76c7f65e]	7	// cfa.cc --
[b87a5ed]	8	//
[51b7345]	9	// Author : Peter A. Buhr
	10	// Created On : Tue Aug 20 13:44:49 2002
[201aeb9]	11	// Last Modified By : Peter A. Buhr
[727c39d5]	12	// Last Modified On : Fri Jun 9 14:36:41 2023
	13	// Update Count : 479
[b87a5ed]	14	//
[51b7345]	15
	16	#include <iostream>
[7f51b9d]	17	#include <cstdio> // perror
	18	#include <cstdlib> // putenv, exit
	19	#include <climits> // PATH_MAX
	20	#include <string> // STL version
	21	#include <algorithm> // find
[51b7345]	22
[36de20d]	23	#include <unistd.h> // execvp
[37fe352]	24	#include <sys/types.h>
	25	#include <sys/stat.h>
	26
[44bca7f]	27	#include "Common/SemanticError.h"
[b87a5ed]	28	#include "config.h" // configure info
[51b7345]	29
	30	using std::cerr;
	31	using std::endl;
	32	using std::string;
[47a8d17]	33	using std::to_string;
[51b7345]	34
[36de20d]	35	//#define __DEBUG_H__
[51b7345]	36
[7f51b9d]	37	#define xstr(s) str(s)
	38	#define str(s) #s
	39
[36de20d]	40	static string __CFA_FLAGPREFIX__( "__CFA_FLAG" ); // "__CFA_FLAG__=" suffix
[51b7345]	41
[7f51b9d]	42	static void Putenv( char * argv[], string arg ) {
[c2051e10]	43	// environment variables must have unique names
	44	static int flags = 0;
[2c60af75]	45
[81bd7e3]	46	// This allocation 'leaks' memory from the program to the execution
	47	// environment, as putenv does not manage the storage of the string used
	48	// as an environment variable. This leak is necessary to ensure the
	49	// underlying C string is allocated long enough.
[0bf5340]	50	if ( putenv( (char )( new string( string( __CFA_FLAGPREFIX__ + to_string( flags++ ) + "__=" ) + arg ) ).c_str() ) ) {
[2c60af75]	51	cerr << argv[0] << " error, cannot set environment variable." << endl;
	52	exit( EXIT_FAILURE );
	53	} // if
	54	} // Putenv
	55
[7f51b9d]	56	static bool prefix( const string & arg, const string & pre ) { // check if string has prefix
[b87a5ed]	57	return arg.substr( 0, pre.size() ) == pre;
[51b7345]	58	} // prefix
	59
[158b026]	60	// check if string has suffix
[7f51b9d]	61	static bool suffix( const string & arg ) {
[8c63bb4]	62	enum { NumSuffixes = 3 };
	63	static const string suffixes[NumSuffixes] = { "cfa", "hfa", "ifa" };
[dffaeac]	64
	65	size_t dot = arg.find_last_of( "." );
	66	if ( dot == string::npos ) return false;
[8c63bb4]	67	const string * end = suffixes + NumSuffixes;
	68	return std::find( suffixes, end, arg.substr( dot + 1 ) ) != end;
[dffaeac]	69	} // suffix
[51b7345]	70
[2c60af75]	71	static inline bool dirExists( const string & path ) { // check if directory exists
[37fe352]	72	struct stat info;
[2c60af75]	73	if ( stat( path.c_str(), &info ) != 0 ) return false;
[b544afa]	74	return (info.st_mode & S_IFDIR) != 0;
[2c60af75]	75	} // dirExists
[37fe352]	76
[bbfd0e0]	77	static inline string dir(const string & path) {
	78	return path.substr(0, path.find_last_of('/'));
[7f51b9d]	79	} // dir
[bbfd0e0]	80
[158b026]	81	// Different path modes
	82	enum PathMode {
	83	Installed, // cfa is installed, use prefix
	84	BuildTree, // cfa is in the tree, use source and build tree
	85	Distributed // cfa is distributed, use build tree for includes and executable directory for .cfs
	86	};
	87
	88	// Get path mode from /proc
	89	PathMode FromProc() {
	90	std::string abspath;
	91	abspath.resize(PATH_MAX);
	92
	93	// get executable path from /proc/self/exe
	94	ssize_t size = readlink("/proc/self/exe", const_cast<char*>(abspath.c_str()), abspath.size());
[fcd1a469]	95	if ( size <= 0 ) {
[158b026]	96	std::cerr << "Error could not evaluate absolute path from /proc/self/exe" << std::endl;
	97	std::cerr << "Failed with " << std::strerror(errno) << std::endl;
	98	std::exit(1);
[fcd1a469]	99	} // if
[158b026]	100
	101	// Trim extra characters
	102	abspath.resize(size);
	103
	104	// Are we installed
[fcd1a469]	105	if ( abspath.rfind(CFA_BINDIR, 0) == 0 ) { return Installed; }
[158b026]	106
	107	// Is this the build tree
[fcd1a469]	108	if ( abspath.rfind(TOP_BUILDDIR, 0 ) == 0 ) { return BuildTree; }
[158b026]	109
	110	// Does this look like distcc
[fcd1a469]	111	if ( abspath.find( "/.cfadistcc/" ) != std::string::npos ) { return Distributed; }
[158b026]	112
	113	// None of the above? Give up since we don't know where the prelude or include directories are
	114	std::cerr << "Cannot find required files from excutable path " << abspath << std::endl;
	115	std::exit(1);
	116	}
	117
[51b7345]	118
[8c63bb4]	119	int main( int argc, char * argv[] ) {
[4b1afb6]	120	string Version( CFA_VERSION_LONG ); // current version number from CONFIG
[2c60af75]	121	string Major( xstr( CFA_VERSION_MAJOR ) ), Minor( xstr( CFA_VERSION_MINOR ) ), Patch( xstr( CFA_VERSION_PATCH ) );
[51b7345]	122
[d6f4488]	123	string installincdir( CFA_INCDIR ); // fixed location of include files
	124	string installlibdir( CFA_LIBDIR ); // fixed location of cc1 and cfa-cpp commands when installed
	125	string srcdriverdir ( TOP_BUILDDIR "driver"); // fixed location of cc1 and cfa-cpp commands when in tree
[51b7345]	126
[b87a5ed]	127	string heading; // banner printed at start of cfa compilation
	128	string arg; // current command-line argument during command-line parsing
[b544afa]	129	string bprefix; // path where gcc looks for compiler steps
[b87a5ed]	130	string langstd; // language standard
[51b7345]	131
[e24f13a]	132	string compiler_path( CFA_BACKEND_CC ); // path/name of C compiler
[b87a5ed]	133	string compiler_name; // name of C compiler
[51b7345]	134
[4f5a8a2]	135	bool x_flag = false; // -x flag
[bbb1b35]	136	bool nonoptarg = false; // no non-option arguments specified, i.e., no file names
	137	bool link = true; // link stage occurring
[b87a5ed]	138	bool verbose = false; // -v flag
[8c63bb4]	139	bool quiet = false; // -quiet flag
	140	bool debug = true; // -debug flag
	141	bool nolib = false; // -nolib flag
	142	bool help = false; // -help flag
[b87a5ed]	143	bool CFA_flag = false; // -CFA flag
	144	bool cpp_flag = false; // -E or -M flag, preprocessor only
[de62360d]	145	bool std_flag = false; // -std= flag
[d746bc8]	146	bool noincstd_flag = false; // -no-include-stdhdr= flag
[6e4b913]	147	bool debugging __attribute(( unused )) = false; // -g flag
[8c63bb4]	148	bool m32 = false; // -m32 flag
	149	bool m64 = false; // -m64 flag
[1ee048fd]	150	bool compiling_libs = false;
[2c60af75]	151	int o_file = 0; // -o filename position
[51b7345]	152
[158b026]	153	PathMode path = FromProc();
	154
[36de20d]	155	const char * args[argc + 100]; // cfa command line values, plus some space for additional flags
[b87a5ed]	156	int sargs = 1; // starting location for arguments in args list
	157	int nargs = sargs; // number of arguments in args list; 0 => command name
[51b7345]	158
[36de20d]	159	const char * libs[argc + 20]; // non-user libraries must come separately, plus some added libraries and flags
[b87a5ed]	160	int nlibs = 0;
[51b7345]	161
[dffaeac]	162	#ifdef __DEBUG_H__
[b87a5ed]	163	cerr << "CFA:" << endl;
[bec4d24]	164	for ( int i = 1; i < argc; i += 1 ) {
	165	cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl;
	166	} // for
[dffaeac]	167	#endif // __DEBUG_H__
[51b7345]	168
[b87a5ed]	169	// process command-line arguments
[51b7345]	170
[b87a5ed]	171	for ( int i = 1; i < argc; i += 1 ) {
	172	arg = argv[i]; // convert to string value
	173	if ( prefix( arg, "-" ) ) {
	174	// pass through arguments
	175
	176	if ( arg == "-Xlinker" \|\| arg == "-o" ) {
[67bfc50]	177	args[nargs++] = argv[i]; // pass flag along
[b87a5ed]	178	i += 1;
	179	if ( i == argc ) continue; // next argument available ?
[2c60af75]	180	args[nargs++] = argv[i]; // pass argument along
	181	if ( arg == "-o" ) o_file = i; // remember file
[36de20d]	182
	183	// CFA specific arguments
	184
[67bfc50]	185	} else if ( strncmp(arg.c_str(), "-XCFA", 5) == 0 ) { // CFA pass through
	186	if ( arg.size() == 5 ) {
[0aa20e3]	187	i += 1;
[67bfc50]	188	if ( i == argc ) continue; // next argument available ?
[fcd1a469]	189	Putenv( argv, argv[i] ); // make available for cc1
[67bfc50]	190	} else if ( arg[5] == ',' ) { // CFA specific arguments
[fcd1a469]	191	string xcfargs = arg.substr( 6 ) + ","; // add sentinel
	192	for ( ;; ) {
	193	size_t posn = xcfargs.find_first_of( "," ); // find separator
	194	if ( posn == string::npos ) break; // any characters left ?
	195	string xcfarg = xcfargs.substr( 0, posn ); // remove XCFA argument
	196	Putenv( argv, xcfarg ); // make available for cc1
	197	xcfargs.erase( 0, posn + 1 ); // remove first argument and comma
	198	} // for
[67bfc50]	199	} else { // CFA specific arguments
[fcd1a469]	200	assert( false ); // this does not make sense
[0aa20e3]	201	args[nargs++] = argv[i];
[67bfc50]	202	} // if
[b87a5ed]	203	} else if ( arg == "-CFA" ) {
[372b6d3]	204	CFA_flag = true; // strip -CFA flag
[b87a5ed]	205	link = false;
[2c60af75]	206	args[nargs++] = "-fsyntax-only"; // stop after stage 2
[b87a5ed]	207	} else if ( arg == "-debug" ) {
[372b6d3]	208	debug = true; // strip debug flag
[b87a5ed]	209	} else if ( arg == "-nodebug" ) {
[372b6d3]	210	debug = false; // strip nodebug flag
[b87a5ed]	211	} else if ( arg == "-quiet" ) {
[372b6d3]	212	quiet = true; // strip quiet flag
[b87a5ed]	213	} else if ( arg == "-noquiet" ) {
[372b6d3]	214	quiet = false; // strip noquiet flag
	215	} else if ( arg == "-invariant" ) {
	216	Putenv( argv, "-" + arg );
	217	} else if ( arg == "--invariant" ) {
	218	Putenv( argv, arg );
[36de20d]	219	} else if ( arg == "-no-include-stdhdr" ) {
[372b6d3]	220	noincstd_flag = true; // strip no-include-stdhdr flag
[36de20d]	221	} else if ( arg == "-nolib" ) {
[372b6d3]	222	nolib = true; // strip nolib flag
[b87a5ed]	223	} else if ( arg == "-help" ) {
[372b6d3]	224	help = true; // strip help flag
[b87a5ed]	225	} else if ( arg == "-nohelp" ) {
[372b6d3]	226	help = false; // strip nohelp flag
[1ee048fd]	227	} else if ( arg == "-cfalib") {
	228	compiling_libs = true;
[b87a5ed]	229	} else if ( arg == "-compiler" ) {
	230	// use the user specified compiler
	231	i += 1;
	232	if ( i == argc ) continue; // next argument available ?
	233	compiler_path = argv[i];
[2c60af75]	234	Putenv( argv, arg + "=" + argv[i] );
[b87a5ed]	235
[de62360d]	236	// C specific arguments
[b87a5ed]	237
	238	} else if ( arg == "-v" ) {
	239	verbose = true; // verbosity required
[67bfc50]	240	args[nargs++] = argv[i]; // pass flag along
[b87a5ed]	241	} else if ( arg == "-g" ) {
	242	debugging = true; // symbolic debugging required
[67bfc50]	243	args[nargs++] = argv[i]; // pass flag along
[b4130f9]	244	} else if ( arg == "-save-temps" \|\| arg == "--save-temps" ) {
[67bfc50]	245	args[nargs++] = argv[i]; // pass flag along
[bbb1b35]	246	Putenv( argv, arg ); // save cfa-cpp output
[8c63bb4]	247	} else if ( prefix( arg, "-x" ) ) { // file suffix ?
	248	string lang;
[67bfc50]	249	args[nargs++] = argv[i]; // pass flag along
[8c63bb4]	250	if ( arg.length() == 2 ) { // separate argument ?
	251	i += 1;
	252	if ( i == argc ) continue; // next argument available ?
	253	lang = argv[i];
[2c60af75]	254	args[nargs++] = argv[i]; // pass argument along
[8c63bb4]	255	} else {
	256	lang = arg.substr( 2 );
	257	} // if
[0163d3e]	258	if ( x_flag ) {
	259	cerr << argv[0] << " warning, only one -x flag per compile, ignoring subsequent flag." << endl;
	260	} else {
	261	x_flag = true;
	262	Putenv( argv, string( "-x=" ) + lang );
	263	} // if
[e3215c5]	264	} else if ( prefix( arg, "-std=" ) \|\| prefix( arg, "--std=" ) ) {
[53ba273]	265	std_flag = true; // -std=XX provided
[67bfc50]	266	args[nargs++] = argv[i]; // pass flag along
[44bca7f]	267	} else if ( arg == "-w" ) {
[67bfc50]	268	args[nargs++] = argv[i]; // pass flag along
[2c60af75]	269	Putenv( argv, arg );
[44bca7f]	270	} else if ( prefix( arg, "-W" ) ) { // check before next tests
	271	if ( arg == "-Werror" \|\| arg == "-Wall" ) {
[67bfc50]	272	args[nargs++] = argv[i]; // pass flag along
[2c60af75]	273	Putenv( argv, argv[i] );
[44bca7f]	274	} else {
	275	unsigned int adv = prefix( arg, "-Wno-" ) ? 5 : 2;
[2c60af75]	276	args[nargs] = argv[i]; // conditionally pass argument along
	277	const char * warning = argv[i] + adv; // extract warning
[af39199d]	278	if ( SemanticWarning_Exist( warning ) ) { // replace the argument for cfa-cpp
[2c60af75]	279	Putenv( argv, arg );
[af39199d]	280	} // if
[44bca7f]	281	nargs += 1;
	282	} // if
[b87a5ed]	283	} else if ( prefix( arg, "-B" ) ) {
[372b6d3]	284	bprefix = arg.substr(2); // strip -B flag
[b87a5ed]	285	} else if ( arg == "-c" \|\| arg == "-S" \|\| arg == "-E" \|\| arg == "-M" \|\| arg == "-MM" ) {
[67bfc50]	286	args[nargs++] = argv[i]; // pass flag along
[b87a5ed]	287	if ( arg == "-E" \|\| arg == "-M" \|\| arg == "-MM" ) {
	288	cpp_flag = true; // cpp only
	289	} // if
	290	link = false; // no linkage required
[67bfc50]	291	} else if ( arg == "-D" \|\| arg == "-U" \|\| arg == "-I" \|\| arg == "-MF" \|\| arg == "-MT" \|\| arg == "-MQ" \|\|
	292	arg == "-include" \|\| arg == "-imacros" \|\| arg == "-idirafter" \|\| arg == "-iprefix" \|\|
	293	arg == "-iwithprefix" \|\| arg == "-iwithprefixbefore" \|\| arg == "-isystem" \|\| arg == "-isysroot" ) {
	294	args[nargs++] = argv[i]; // pass flag along
	295	i += 1;
	296	args[nargs++] = argv[i]; // pass argument along
[b87a5ed]	297	} else if ( arg[1] == 'l' ) {
	298	// if the user specifies a library, load it after user code
[2c60af75]	299	libs[nlibs++] = argv[i];
[37fe352]	300	} else if ( arg == "-m32" ) {
	301	m32 = true;
	302	m64 = false;
[2c60af75]	303	args[nargs++] = argv[i];
[37fe352]	304	} else if ( arg == "-m64" ) {
	305	m64 = true;
	306	m32 = false;
[2c60af75]	307	args[nargs++] = argv[i];
[b87a5ed]	308	} else {
	309	// concatenate any other arguments
[2c60af75]	310	args[nargs++] = argv[i];
[b87a5ed]	311	} // if
	312	} else {
[8c63bb4]	313	bool cfa = suffix( arg ); // check suffix
[4f5a8a2]	314	if ( ! x_flag && cfa ) { // no explicit suffix and cfa suffix ?
[2c60af75]	315	args[nargs++] = "-x";
	316	args[nargs++] = "c";
[8c63bb4]	317	} // if
[2c60af75]	318	args[nargs++] = argv[i]; // concatenate files
[4f5a8a2]	319	if ( ! x_flag && cfa ) { // no explicit suffix and cfa suffix ?
[2c60af75]	320	args[nargs++] = "-x";
	321	args[nargs++] = "none";
[dffaeac]	322	} // if
[b87a5ed]	323	nonoptarg = true;
	324	} // if
	325	} // for
[51b7345]	326
[f4530d7]	327	#ifdef __x86_64__
	328	args[nargs++] = "-mcx16"; // allow double-wide CAS
	329	#endif // __x86_64__
	330
[8cbb6aa]	331	// ARM -mno-outline-atomics => use LL/SC instead of calls to atomic routines: __aarch64_swp_acq_rel, __aarch64_cas8_acq_rel
	332	// ARM -march=armv8.2-a+lse => generate Arm LSE extension instructions SWAP and CAS
	333	// https://community.arm.com/developer/tools-software/tools/b/tools-software-ides-blog/posts/making-the-most-of-the-arm-architecture-in-gcc-10
[41639089]	334	#ifdef __ARM_ARCH
	335	args[nargs++] = "-mno-outline-atomics"; // use ARM LL/SC instructions for atomics
[727c39d5]	336	// args[nargs++] = "-march=armv8.2-a+lse"; // use atomic instructions
[41639089]	337	#endif // __ARM_ARCH
	338
[dffaeac]	339	#ifdef __DEBUG_H__
[b87a5ed]	340	cerr << "args:";
	341	for ( int i = 1; i < nargs; i += 1 ) {
	342	cerr << " " << args[i];
	343	} // for
	344	cerr << endl;
[dffaeac]	345	#endif // __DEBUG_H__
[51b7345]	346
[bbb1b35]	347	// -E flag stops at cc1 stage 1, so cfa-cpp in cc1 stage 2 is never executed.
[b87a5ed]	348	if ( cpp_flag && CFA_flag ) {
[aced69a]	349	CFA_flag = false;
	350	cerr << argv[0] << " warning, both -E and -CFA flags specified, using -E and ignoring -CFA." << endl;
[b87a5ed]	351	} // if
[51b7345]	352
[6e4b913]	353	// add the CFA include-library paths, which allow direct access to header files without directory qualification
[158b026]	354	string libbase;
	355	switch(path) {
[36de20d]	356	case Installed:
[2c60af75]	357	args[nargs++] = "-I" CFA_INCDIR;
[158b026]	358	// do not use during build
	359	if ( ! noincstd_flag ) {
[2c60af75]	360	args[nargs++] = "-I" CFA_INCDIR "stdhdr";
[a5121bf]	361	} // if
[2c60af75]	362	args[nargs++] = "-I" CFA_INCDIR "concurrency";
	363	args[nargs++] = "-I" CFA_INCDIR "containers";
[158b026]	364	libbase = CFA_LIBDIR;
	365	break;
[36de20d]	366	case BuildTree:
	367	case Distributed:
[2c60af75]	368	args[nargs++] = "-I" TOP_SRCDIR "libcfa/src";
[158b026]	369	// do not use during build
	370	if ( ! noincstd_flag ) {
[2c60af75]	371	args[nargs++] = "-I" TOP_SRCDIR "libcfa/src" "/stdhdr";
[a5121bf]	372	} // if
[2c60af75]	373	args[nargs++] = "-I" TOP_SRCDIR "libcfa/src" "/concurrency";
	374	args[nargs++] = "-I" TOP_SRCDIR "libcfa/src" "/containers";
[158b026]	375
	376	libbase = TOP_BUILDDIR "libcfa/";
	377
	378	break;
[2c60af75]	379	} // if
[76c7f65e]	380
[a37133c]	381	// add stdbool to get defines for bool/true/false
[2c60af75]	382	args[nargs++] = "-imacros";
	383	args[nargs++] = "stdbool.h";
[a37133c]	384
[fcd1a469]	385	if ( compiling_libs ) {
[2c60af75]	386	Putenv( argv, "-t" );
	387	} // if
[37fe352]	388
[bbb1b35]	389	string arch( m32 ? CFA_32_CPU : (m64 ? CFA_64_CPU : CFA_DEFAULT_CPU) );
[13a984c]	390	if ( ! m32 && ! m64 ) {
	391	if ( arch == "x86" ) {
[2c60af75]	392	args[nargs++] = "-m32";
[13a984c]	393	} else if ( arch == "x64" ) {
[2c60af75]	394	args[nargs++] = "-m64";
[13a984c]	395	} // if
[dfb7c96]	396	} // if
[a5121bf]	397
[c9e640e]	398	const char * config = nolib ? "nolib" : (debug ? "debug": "nodebug");
[a5121bf]	399	string libdir = libbase + arch + "-" + config;
[dfb7c96]	400
[36de20d]	401	if ( path != Distributed ) {
[bbfd0e0]	402	if ( ! nolib && ! dirExists( libdir ) ) {
	403	cerr << argv[0] << " internal error, configuration " << config << " not installed." << endl;
	404	cerr << "Was looking for " << libdir << endl;
	405	for(int i = 1; i < argc; i++) {
	406	cerr << argv[i] << " ";
	407	}
	408	cerr << endl;
	409	libdir = libbase + arch + "-" + "nolib";
	410	} // if
[a5121bf]	411
[bbfd0e0]	412	if ( ! dirExists( libdir ) ) {
	413	cerr << argv[0] << " internal error, cannot find prelude directory." << endl;
	414	cerr << "Was looking for " << libdir << endl;
	415	exit( EXIT_FAILURE );
	416	} // if
[dfb7c96]	417	} // if
[a5121bf]	418
[c680a4b]	419	string preludedir;
[158b026]	420	switch(path) {
[36de20d]	421	case Installed : preludedir = libdir; break;
	422	case BuildTree : preludedir = libdir + "/prelude"; break;
	423	case Distributed : preludedir = dir(argv[0]); break;
	424	} // switch
[81e60f7]	425
[c680a4b]	426	Putenv( argv, "--prelude-dir=" + preludedir );
	427	args[nargs++] = "-include";
	428	args[nargs++] = (*new string(preludedir + "/defines.hfa")).c_str();
	429
[def9d4e]	430	for ( int i = 0; i < nlibs; i += 1 ) { // copy non-user libraries after all user libraries
[2c60af75]	431	args[nargs++] = libs[i];
[def9d4e]	432	} // for
	433
[b87a5ed]	434	if ( link ) {
[2c60af75]	435	args[nargs++] = "-Xlinker";
	436	args[nargs++] = "--undefined=__cfaabi_dbg_bits_write";
	437	args[nargs++] = "-Xlinker";
	438	args[nargs++] = "--undefined=__cfaabi_interpose_startup";
	439	args[nargs++] = "-Xlinker";
	440	args[nargs++] = "--undefined=__cfaabi_appready_startup";
[c8c0c7c5]	441	args[nargs++] = "-z";
	442	args[nargs++] = "execstack";
[6bfe5cc]	443
[b544afa]	444	// include the cfa library in case it is needed
[158b026]	445	args[nargs++] = ( *new string( string("-L" ) + libdir + (path != Installed ? "/src/.libs" : "")) ).c_str();
	446	args[nargs++] = ( *new string( string("-Wl,-rpath," ) + libdir + (path != Installed ? "/src/.libs" : "")) ).c_str();
[2c60af75]	447	args[nargs++] = "-Wl,--push-state,--as-needed";
	448	args[nargs++] = "-lcfathread";
	449	args[nargs++] = "-Wl,--pop-state";
[92a9768]	450	args[nargs++] = "-Wl,--push-state,--no-as-needed";
[2c60af75]	451	args[nargs++] = "-lcfa";
[92a9768]	452	args[nargs++] = "-Wl,--pop-state";
[f4530d7]	453	args[nargs++] = "-pthread";
[9b34766]	454	#if defined( __x86_64__ ) \|\| defined( __ARM_ARCH )
[f4530d7]	455	args[nargs++] = "-latomic"; // allow double-wide CAS
[314dab6]	456	#endif // __x86_64__
[2c60af75]	457	args[nargs++] = "-ldl";
	458	args[nargs++] = "-lm";
[51b7345]	459	} // if
	460
[2c60af75]	461	args[nargs++] = "-fexceptions"; // add exception flags (unconditionally)
[f5f2768]	462	args[nargs++] = "-D_GNU_SOURCE"; // force gnu libraries
[e9145a3]	463
[2c60af75]	464	// add flags based on the type of compile
[8c17ab0]	465
[2c60af75]	466	args[nargs++] = ( *new string( string("-D__CFA_MAJOR__=") + Major ) ).c_str();
	467	args[nargs++] = ( *new string( string("-D__CFA_MINOR__=") + Minor ) ).c_str();
	468	args[nargs++] = ( *new string( string("-D__CFA_PATCH__=") + Patch ) ).c_str();
	469	args[nargs++] = "-D__CFA__";
	470	args[nargs++] = "-D__CFORALL__";
	471	args[nargs++] = "-D__cforall";
[51b7345]	472
[b87a5ed]	473	if ( cpp_flag ) {
[2c60af75]	474	args[nargs++] = "-D__CPP__";
[b87a5ed]	475	} // if
[51b7345]	476
[b87a5ed]	477	if ( CFA_flag ) {
[2c60af75]	478	Putenv( argv, "-N" );
	479	Putenv( argv, "-CFA" );
[bbb1b35]	480	// -CFA implies cc1 stage 2, but gcc does not pass the -o file to this stage because it believe the file is for
	481	// the linker. Hence, the -o file is explicit passed to cc1 stage 2 and used as cfa-cpp's output file.
[2c60af75]	482	if ( o_file ) Putenv( argv, string( "-o=" ) + argv[o_file] );
[fa477f7]	483	} else {
[2c60af75]	484	Putenv( argv, "-L" );
[b87a5ed]	485	} // if
[2c60af75]	486
[b87a5ed]	487	if ( debug ) {
	488	heading += " (debug)";
[2c60af75]	489	args[nargs++] = "-D__CFA_DEBUG__";
[b87a5ed]	490	} else {
	491	heading += " (no debug)";
	492	} // if
[51b7345]	493
[417a630]	494	if ( bprefix.length() == 0 ) {
[158b026]	495	switch(path) {
[36de20d]	496	case Installed : bprefix = installlibdir; break;
	497	case BuildTree : bprefix = srcdriverdir ; break;
	498	case Distributed : bprefix = dir(argv[0]) ; break;
	499	} // switch
[b87a5ed]	500	} // if
[36de20d]	501	if ( bprefix[bprefix.length() - 1] != '/' ) bprefix += '/';
	502	Putenv( argv, string("-B=") + bprefix );
[51b7345]	503
[2c60af75]	504	args[nargs++] = "-Xlinker"; // used by backtrace
	505	args[nargs++] = "-export-dynamic";
[6bfe5cc]	506
[b87a5ed]	507	// execute the compilation command
[51b7345]	508
[b87a5ed]	509	args[0] = compiler_path.c_str(); // set compiler command for exec
	510	// find actual name of the compiler independent of the path to it
	511	int p = compiler_path.find_last_of( '/' ); // scan r -> l for first '/'
	512	if ( p == -1 ) {
	513	compiler_name = compiler_path;
	514	} else {
	515	compiler_name = *new string( compiler_path.substr( p + 1 ) );
	516	} // if
[51b7345]	517
[b87a5ed]	518	if ( prefix( compiler_name, "gcc" ) ) { // allow suffix on gcc name
[2c60af75]	519	args[nargs++] = "-no-integrated-cpp";
	520	args[nargs++] = "-Wno-deprecated";
[e35a32b]	521	args[nargs++] = "-Wno-strict-aliasing"; // casting from one type to another
[2c60af75]	522	#ifdef HAVE_CAST_FUNCTION_TYPE
	523	args[nargs++] = "-Wno-cast-function-type";
	524	#endif // HAVE_CAST_FUNCTION_TYPE
[36de20d]	525	if ( ! std_flag && ! x_flag ) {
	526	args[nargs++] = "-std=gnu11"; // default c11, if none specified
[de62360d]	527	} // if
[2c60af75]	528	args[nargs++] = "-fgnu89-inline";
	529	args[nargs++] = "-D__int8_t_defined"; // prevent gcc type-size attributes
[417a630]	530	args[nargs++] = ( *new string( string("-B") + bprefix ) ).c_str();
[b87a5ed]	531	} else {
[e24f13a]	532	cerr << argv[0] << " error, compiler \"" << compiler_name << "\" unsupported." << endl;
[b87a5ed]	533	exit( EXIT_FAILURE );
	534	} // if
[51b7345]	535
[bbb1b35]	536	args[nargs] = nullptr; // terminate
[51b7345]	537
[dffaeac]	538	#ifdef __DEBUG_H__
[b87a5ed]	539	cerr << "nargs: " << nargs << endl;
	540	cerr << "args:" << endl;
[bbb1b35]	541	for ( int i = 0; args[i] != nullptr; i += 1 ) {
[b87a5ed]	542	cerr << " \"" << args[i] << "\"" << endl;
	543	} // for
[1ee048fd]	544	cerr << endl;
[dffaeac]	545	#endif // __DEBUG_H__
[51b7345]	546
[b87a5ed]	547	if ( ! quiet ) {
	548	cerr << "CFA " << "Version " << Version << heading << endl;
	549	if ( help ) {
	550	cerr <<
	551	"-debug\t\t\t: use cfa runtime with debug checking" << endl <<
	552	"-help\t\t\t: print this help message" << endl <<
	553	"-quiet\t\t\t: print no messages from the cfa command" << endl <<
	554	"-CFA\t\t\t: run the cpp preprocessor and the cfa-cpp translator" << endl <<
	555	"-XCFA -cfa-cpp-flag\t: pass next flag as-is to the cfa-cpp translator" << endl <<
	556	"...\t\t\t: any other " << compiler_name << " flags" << endl;
	557	} // if
[51b7345]	558	} // if
	559
[b87a5ed]	560	if ( verbose ) {
	561	if ( argc == 2 ) exit( EXIT_SUCCESS ); // if only the -v flag is specified, do not invoke gcc
[51b7345]	562
[bbb1b35]	563	for ( int i = 0; args[i] != nullptr; i += 1 ) {
[b87a5ed]	564	cerr << args[i] << " ";
	565	} // for
	566	cerr << endl;
	567	} // if
[51b7345]	568
[b87a5ed]	569	if ( ! nonoptarg ) {
	570	cerr << argv[0] << " error, no input files" << endl;
	571	exit( EXIT_FAILURE );
	572	} // if
[51b7345]	573
[b87a5ed]	574	// execute the command and return the result
[51b7345]	575
[36de20d]	576	execvp( args[0], (char * const *)args ); // should not return
[2c60af75]	577	perror( "CFA Translator error: execvp" );
[b87a5ed]	578	exit( EXIT_FAILURE );
[51b7345]	579	} // main
	580
	581	// Local Variables: //
[b87a5ed]	582	// tab-width: 4 //
	583	// mode: c++ //
[51b7345]	584	// compile-command: "make install" //
	585	// End: //

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