Blame src/host/slbt_host_params.c

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/*******************************************************************/
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/*  slibtool: a skinny libtool implementation, written in C        */
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/*  Copyright (C) 2016--2024  SysDeer Technologies, LLC            */
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/*  Released under the Standard MIT License; see COPYING.SLIBTOOL. */
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/*******************************************************************/
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <fcntl.h>
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#include <spawn.h>
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#include <sys/wait.h>
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#include <slibtool/slibtool.h>
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#include "slibtool_driver_impl.h"
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#include "slibtool_errinfo_impl.h"
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#include "slibtool_visibility_impl.h"
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#include "slibtool_ar_impl.h"
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/* annotation strings */
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static const char cfgexplicit[] = "command-line argument";
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static const char cfghost[]     = "derived from <host>";
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static const char cfgtarget[]   = "derived from <target>";
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static const char cfgcompiler[] = "derived from <compiler>";
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static const char cfgnmachine[] = "native (cached in ccenv/host.mk)";
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static const char cfgxmachine[] = "foreign (derived from -dumpmachine)";
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static const char cfgnative[]   = "native";
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static void slbt_get_host_quad(
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	char *	hostbuf,
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	char ** hostquad)
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{
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	char *	mark;
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	char *	ch;
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	int	i;
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	for (i=0, ch=hostbuf, mark=hostbuf; *ch && i<4; ch++) {
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		if (*ch == '-') {
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			*ch = 0;
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			hostquad[i++] = mark;
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			mark = &ch[1];
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		}
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	}
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	if (i<4)
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		hostquad[i] = mark;
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	if (i==3) {
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		hostquad[1] = hostquad[2];
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		hostquad[2] = hostquad[3];
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		hostquad[3] = 0;
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	}
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}
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static void slbt_spawn_ar(char ** argv, int * ecode)
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{
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	int	estatus;
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	pid_t	pid;
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	*ecode = 127;
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	if ((pid = fork()) < 0) {
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		return;
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	} else if (pid == 0) {
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		execvp(argv[0],argv);
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		_exit(errno);
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	} else {
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		waitpid(pid,&estatus,0);
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		if (WIFEXITED(estatus))
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			*ecode = WEXITSTATUS(estatus);
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	}
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}
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slbt_hidden int slbt_init_host_params(
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	const struct slbt_driver_ctx *	dctx,
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	const struct slbt_common_ctx *	cctx,
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	struct slbt_host_strs *		drvhost,
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	struct slbt_host_params *	host,
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	struct slbt_host_params *	cfgmeta,
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	const char *                    cfgmeta_host,
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	const char *                    cfgmeta_ar,
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	const char *                    cfgmeta_as,
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	const char *                    cfgmeta_nm,
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	const char *                    cfgmeta_ranlib,
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	const char *                    cfgmeta_dlltool)
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{
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	int		fdcwd;
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	int		arprobe;
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	int		arfd;
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	int		ecode;
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	size_t		toollen;
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	char *		dash;
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	char *		base;
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	char *		mark;
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	const char *	machine;
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	bool		ftarget       = false;
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	bool		fhost         = false;
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	bool		fcompiler     = false;
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	bool		fnative       = false;
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	bool		fdumpmachine  = false;
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	char		buf        [256];
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	char		hostbuf    [256];
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	char		machinebuf [256];
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	char *		hostquad   [4];
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	char *		machinequad[4];
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	char *		arprobeargv[4];
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	char		archivename[] = "/tmp/slibtool.ar.probe.XXXXXXXXXXXXXXXX";
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	/* base */
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	if ((base = strrchr(cctx->cargv[0],'/')))
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		base++;
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	else
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		base = cctx->cargv[0];
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	fdumpmachine  = (cctx->mode == SLBT_MODE_COMPILE)
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			|| (cctx->mode == SLBT_MODE_LINK)
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			|| (cctx->mode == SLBT_MODE_INFO);
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	fdumpmachine &= (!strcmp(base,"xgcc")
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			|| !strcmp(base,"xg++"));
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	/* support the portbld <--> unknown synonym */
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	if (!(drvhost->machine = strdup(SLBT_MACHINE)))
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		return -1;
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	if ((mark = strstr(drvhost->machine,"-portbld-")))
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		memcpy(mark,"-unknown",8);
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	/* host */
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	if (host->host) {
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		cfgmeta->host = cfgmeta_host ? cfgmeta_host : cfgexplicit;
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		fhost         = true;
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	} else if (cctx->target) {
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		host->host    = cctx->target;
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		cfgmeta->host = cfgtarget;
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		ftarget       = true;
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	} else if (strrchr(base,'-')) {
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		if (!(drvhost->host = strdup(cctx->cargv[0])))
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			return -1;
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		dash          = strrchr(drvhost->host,'-');
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		*dash         = 0;
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		host->host    = drvhost->host;
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		cfgmeta->host = cfgcompiler;
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		fcompiler     = true;
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	} else if (!fdumpmachine) {
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		host->host    = drvhost->machine;
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		cfgmeta->host = cfgnmachine;
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	} else if (slbt_util_dump_machine(cctx->cargv[0],buf,sizeof(buf)) < 0) {
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		if (dctx)
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			slbt_dprintf(
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				slbt_driver_fderr(dctx),
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				"%s: could not determine host "
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				"via -dumpmachine\n",
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				dctx->program);
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		return -1;
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	} else {
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		if (!(drvhost->host = strdup(buf)))
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			return -1;
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		host->host    = drvhost->host;
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		fcompiler     = true;
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		fnative       = !strcmp(host->host,drvhost->machine);
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		cfgmeta->host = fnative ? cfgnmachine : cfgxmachine;
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		if (!fnative) {
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			strcpy(hostbuf,host->host);
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			strcpy(machinebuf,drvhost->machine);
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			slbt_get_host_quad(hostbuf,hostquad);
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			slbt_get_host_quad(machinebuf,machinequad);
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			if (hostquad[2] && machinequad[2])
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				fnative = !strcmp(hostquad[0],machinequad[0])
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					&& !strcmp(hostquad[1],machinequad[1])
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					&& !strcmp(hostquad[2],machinequad[2]);
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		}
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	}
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	/* flavor */
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	if (host->flavor) {
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		cfgmeta->flavor = cfgexplicit;
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	} else {
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		if (fhost) {
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			machine         = host->host;
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			cfgmeta->flavor = cfghost;
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		} else if (ftarget) {
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			machine         = cctx->target;
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			cfgmeta->flavor = cfgtarget;
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		} else if (fcompiler) {
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			machine         = drvhost->host;
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			cfgmeta->flavor = cfgcompiler;
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		} else {
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			machine         = drvhost->machine;
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			cfgmeta->flavor = cfgnmachine;
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		}
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		dash = strrchr(machine,'-');
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		cfgmeta->flavor = cfghost;
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		if ((dash && !strcmp(dash,"-bsd")) || strstr(machine,"-bsd-"))
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			host->flavor = "bsd";
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		else if ((dash && !strcmp(dash,"-cygwin")) || strstr(machine,"-cygwin-"))
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			host->flavor = "cygwin";
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		else if ((dash && !strcmp(dash,"-msys")) || strstr(machine,"-msys-"))
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			host->flavor = "msys";
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		else if ((dash && !strcmp(dash,"-darwin")) || strstr(machine,"-darwin"))
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			host->flavor = "darwin";
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		else if ((dash && !strcmp(dash,"-linux")) || strstr(machine,"-linux-"))
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			host->flavor = "linux";
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		else if ((dash && !strcmp(dash,"-midipix")) || strstr(machine,"-midipix-"))
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			host->flavor = "midipix";
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		else if ((dash && !strcmp(dash,"-mingw")) || strstr(machine,"-mingw-"))
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			host->flavor = "mingw";
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		else if ((dash && !strcmp(dash,"-mingw32")) || strstr(machine,"-mingw32-"))
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			host->flavor = "mingw";
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		else if ((dash && !strcmp(dash,"-mingw64")) || strstr(machine,"-mingw64-"))
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			host->flavor = "mingw";
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		else if ((dash && !strcmp(dash,"-windows")) || strstr(machine,"-windows-"))
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			host->flavor = "mingw";
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		else {
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			host->flavor   = "default";
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			cfgmeta->flavor = "fallback, unverified";
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		}
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		if (fcompiler && !fnative)
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			if ((mark = strstr(drvhost->machine,host->flavor)))
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				if (mark > drvhost->machine)
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					fnative = (*--mark == '-');
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	}
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	/* toollen */
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	toollen =  fnative ? 0 : strlen(host->host);
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	toollen += strlen("-utility-name");
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	/* ar */
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	if (host->ar)
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		cfgmeta->ar = cfgmeta_ar ? cfgmeta_ar : cfgexplicit;
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	else {
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		if (!(drvhost->ar = calloc(1,toollen)))
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			return -1;
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		if (fnative) {
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			strcpy(drvhost->ar,"ar");
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			cfgmeta->ar = cfgnative;
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			arprobe = 0;
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		} else if (cctx->mode == SLBT_MODE_LINK) {
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			arprobe = true;
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		} else if (cctx->mode == SLBT_MODE_INFO) {
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			arprobe = true;
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		} else {
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			arprobe = false;
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		}
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		/* arprobe */
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		if (arprobe) {
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			sprintf(drvhost->ar,"%s-ar",host->host);
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			cfgmeta->ar = cfghost;
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			ecode       = 127;
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			/* empty archive */
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			if ((arfd = mkstemp(archivename)) >= 0) {
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				slbt_dprintf(arfd,"!<arch>\n");
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				arprobeargv[0] = drvhost->ar;
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				arprobeargv[1] = "-t";
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				arprobeargv[2] = archivename;
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				arprobeargv[3] = 0;
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				/* <target>-ar */
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				slbt_spawn_ar(
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					arprobeargv,
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					&ecode);
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			}
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			/* <target>-<compiler>-ar */
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			if (ecode && !strchr(base,'-')) {
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				sprintf(drvhost->ar,"%s-%s-ar",host->host,base);
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				slbt_spawn_ar(
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					arprobeargv,
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					&ecode);
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			}
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			/* <compiler>-ar */
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			if (ecode && !strchr(base,'-')) {
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				sprintf(drvhost->ar,"%s-ar",base);
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				slbt_spawn_ar(
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					arprobeargv,
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					&ecode);
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			}
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			/* if target is the native target, fallback to native ar */
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			if (ecode && !strcmp(host->host,SLBT_MACHINE)) {
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				strcpy(drvhost->ar,"ar");
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				cfgmeta->ar = cfgnative;
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			}
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			/* fdcwd */
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			fdcwd = slbt_driver_fdcwd(dctx);
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			/* clean up */
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			if (arfd >= 0) {
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				unlinkat(fdcwd,archivename,0);
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				close(arfd);
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			}
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		}
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		host->ar = drvhost->ar;
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	}
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	/* as */
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	if (host->as)
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		cfgmeta->as = cfgmeta_as ? cfgmeta_as : cfgexplicit;
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	else {
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		if (!(drvhost->as = calloc(1,toollen)))
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			return -1;
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		if (fnative) {
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			strcpy(drvhost->as,"as");
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			cfgmeta->as = cfgnative;
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		} else {
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			sprintf(drvhost->as,"%s-as",host->host);
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			cfgmeta->as = cfghost;
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		}
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		host->as = drvhost->as;
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	}
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	/* nm */
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	if (host->nm)
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		cfgmeta->nm = cfgmeta_nm ? cfgmeta_nm : cfgexplicit;
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	else {
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		if (!(drvhost->nm = calloc(1,toollen)))
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			return -1;
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		if (fnative) {
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			strcpy(drvhost->nm,"nm");
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			cfgmeta->nm = cfgnative;
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		} else {
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			sprintf(drvhost->nm,"%s-nm",host->host);
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			cfgmeta->nm = cfghost;
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		}
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		host->nm = drvhost->nm;
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	}
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	/* ranlib */
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	if (host->ranlib)
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		cfgmeta->ranlib = cfgmeta_ranlib ? cfgmeta_ranlib : cfgexplicit;
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	else {
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		if (!(drvhost->ranlib = calloc(1,toollen)))
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			return -1;
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		if (fnative) {
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			strcpy(drvhost->ranlib,"ranlib");
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			cfgmeta->ranlib = cfgnative;
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		} else {
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			sprintf(drvhost->ranlib,"%s-ranlib",host->host);
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			cfgmeta->ranlib = cfghost;
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		}
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		host->ranlib = drvhost->ranlib;
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	}
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	/* windres */
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	if (host->windres)
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		cfgmeta->windres = cfgexplicit;
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	else if (strcmp(host->flavor,"cygwin")
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			&& strcmp(host->flavor,"msys")
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			&& strcmp(host->flavor,"midipix")
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			&& strcmp(host->flavor,"mingw")) {
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		host->windres    = "";
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		cfgmeta->windres = "not applicable";
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	} else {
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		if (!(drvhost->windres = calloc(1,toollen)))
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			return -1;
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		if (fnative) {
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			strcpy(drvhost->windres,"windres");
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			cfgmeta->windres = cfgnative;
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		} else {
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			sprintf(drvhost->windres,"%s-windres",host->host);
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			cfgmeta->windres = cfghost;
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		}
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		host->windres = drvhost->windres;
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	}
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	/* dlltool */
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	if (host->dlltool)
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		cfgmeta->dlltool = cfgmeta_dlltool ? cfgmeta_dlltool : cfgexplicit;
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	else if (strcmp(host->flavor,"cygwin")
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			&& strcmp(host->flavor,"msys")
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			&& strcmp(host->flavor,"midipix")
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			&& strcmp(host->flavor,"mingw")) {
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		host->dlltool = "";
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		cfgmeta->dlltool = "not applicable";
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	} else {
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		if (!(drvhost->dlltool = calloc(1,toollen)))
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			return -1;
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		if (fnative) {
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			strcpy(drvhost->dlltool,"dlltool");
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			cfgmeta->dlltool = cfgnative;
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		} else {
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			sprintf(drvhost->dlltool,"%s-dlltool",host->host);
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			cfgmeta->dlltool = cfghost;
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		}
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		host->dlltool = drvhost->dlltool;
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	}
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	/* mdso */
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	if (host->mdso)
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		cfgmeta->mdso = cfgexplicit;
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	else if (strcmp(host->flavor,"cygwin")
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			&& strcmp(host->flavor,"msys")
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			&& strcmp(host->flavor,"midipix")
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			&& strcmp(host->flavor,"mingw")) {
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		host->mdso = "";
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		cfgmeta->mdso = "not applicable";
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	} else {
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		if (!(drvhost->mdso = calloc(1,toollen)))
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			return -1;
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		if (fnative) {
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			strcpy(drvhost->mdso,"mdso");
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			cfgmeta->mdso = cfgnative;
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		} else {
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			sprintf(drvhost->mdso,"%s-mdso",host->host);
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			cfgmeta->mdso = cfghost;
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		}
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		host->mdso = drvhost->mdso;
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	}
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	return 0;
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}
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static void slbt_free_host_tool_argv(char ** argv)
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{
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	char ** parg;
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	if (!argv)
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		return;
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	for (parg=argv; *parg; parg++)
5ddd2a
		free(*parg);
5ddd2a
5ddd2a
	free(argv);
5ddd2a
}
8f60d4
4b56de
slbt_hidden void slbt_free_host_params(struct slbt_host_strs * host)
8f60d4
{
8f60d4
	if (host->machine)
8f60d4
		free(host->machine);
8f60d4
8f60d4
	if (host->host)
8f60d4
		free(host->host);
8f60d4
8f60d4
	if (host->flavor)
8f60d4
		free(host->flavor);
8f60d4
8f60d4
	if (host->ar)
8f60d4
		free(host->ar);
8f60d4
6bc170
	if (host->as)
6bc170
		free(host->as);
6bc170
b5e104
	if (host->nm)
b5e104
		free(host->nm);
b5e104
8f60d4
	if (host->ranlib)
8f60d4
		free(host->ranlib);
8f60d4
8f60d4
	if (host->windres)
8f60d4
		free(host->windres);
8f60d4
8f60d4
	if (host->dlltool)
8f60d4
		free(host->dlltool);
8f60d4
8f60d4
	if (host->mdso)
8f60d4
		free(host->mdso);
8f60d4
5ddd2a
	slbt_free_host_tool_argv(host->ar_argv);
5ddd2a
	slbt_free_host_tool_argv(host->as_argv);
b5e104
	slbt_free_host_tool_argv(host->nm_argv);
5ddd2a
	slbt_free_host_tool_argv(host->ranlib_argv);
5ddd2a
	slbt_free_host_tool_argv(host->windres_argv);
5ddd2a
	slbt_free_host_tool_argv(host->dlltool_argv);
5ddd2a
	slbt_free_host_tool_argv(host->mdso_argv);
5ddd2a
8f60d4
	memset(host,0,sizeof(*host));
8f60d4
}
8f60d4
8f60d4
4373b8
void slbt_host_reset_althost(const struct slbt_driver_ctx * ctx)
8f60d4
{
8f60d4
	struct slbt_driver_ctx_alloc *	ictx;
8f60d4
	uintptr_t			addr;
8f60d4
8f60d4
	addr = (uintptr_t)ctx - offsetof(struct slbt_driver_ctx_alloc,ctx);
8f60d4
	addr = addr - offsetof(struct slbt_driver_ctx_impl,ctx);
8f60d4
	ictx = (struct slbt_driver_ctx_alloc *)addr;
8f60d4
8f60d4
	slbt_free_host_params(&ictx->ctx.ahost);
8f60d4
}
8f60d4
4373b8
int  slbt_host_set_althost(
8f60d4
	const struct slbt_driver_ctx *	ctx,
8f60d4
	const char *			host,
8f60d4
	const char *			flavor)
8f60d4
{
8f60d4
	struct slbt_driver_ctx_alloc *	ictx;
8f60d4
	uintptr_t			addr;
8f60d4
8f60d4
	addr = (uintptr_t)ctx - offsetof(struct slbt_driver_ctx_alloc,ctx);
8f60d4
	addr = addr - offsetof(struct slbt_driver_ctx_impl,ctx);
8f60d4
	ictx = (struct slbt_driver_ctx_alloc *)addr;
8f60d4
	slbt_free_host_params(&ictx->ctx.ahost);
8f60d4
8f60d4
	if (!(ictx->ctx.ahost.host = strdup(host)))
8f60d4
		return SLBT_SYSTEM_ERROR(ctx,0);
8f60d4
8f60d4
	if (!(ictx->ctx.ahost.flavor = strdup(flavor))) {
8f60d4
		slbt_free_host_params(&ictx->ctx.ahost);
8f60d4
		return SLBT_SYSTEM_ERROR(ctx,0);
8f60d4
	}
8f60d4
8f60d4
	ictx->ctx.cctx.ahost.host   = ictx->ctx.ahost.host;
8f60d4
	ictx->ctx.cctx.ahost.flavor = ictx->ctx.ahost.flavor;
8f60d4
8f60d4
	if (slbt_init_host_params(
8f60d4
			0,
8f60d4
			ctx->cctx,
8f60d4
			&ictx->ctx.ahost,
8f60d4
			&ictx->ctx.cctx.ahost,
8f60d4
			&ictx->ctx.cctx.acfgmeta,
b5e104
			0,0,0,0,0,0)) {
8f60d4
		slbt_free_host_params(&ictx->ctx.ahost);
8f60d4
		return SLBT_CUSTOM_ERROR(ctx,SLBT_ERR_HOST_INIT);
8f60d4
	}
8f60d4
8f60d4
	slbt_init_flavor_settings(
8f60d4
		&ictx->ctx.cctx,
8f60d4
		&ictx->ctx.cctx.ahost,
8f60d4
		&ictx->ctx.cctx.asettings);
8f60d4
8f60d4
	if (slbt_init_ldrpath(
8f60d4
			&ictx->ctx.cctx,
8f60d4
			&ictx->ctx.cctx.ahost)) {
8f60d4
		slbt_free_host_params(&ictx->ctx.ahost);
8f60d4
		return SLBT_CUSTOM_ERROR(ctx,SLBT_ERR_LDRPATH_INIT);
8f60d4
	}
8f60d4
8f60d4
	return 0;
8f60d4
}