mirror of
https://github.com/xomboverlord/ldc.git
synced 2026-08-01 20:10:04 +02:00
[svn r5] Initial commit. Most things are very rough.
This commit is contained in:
Tomas Lindquist Olsen
504
dmd/link.c
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504
dmd/link.c
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@@ -0,0 +1,504 @@
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// Copyright (c) 1999-2007 by Digital Mars
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// All Rights Reserved
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// written by Walter Bright
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// http://www.digitalmars.com
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// License for redistribution is by either the Artistic License
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// in artistic.txt, or the GNU General Public License in gnu.txt.
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// See the included readme.txt for details.
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#include <stdio.h>
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#include <ctype.h>
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#include <assert.h>
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#include <stdarg.h>
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#include <string.h>
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#include <stdlib.h>
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#if _WIN32
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#include <process.h>
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#endif
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#if linux
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#endif
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#include "root.h"
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#include "mars.h"
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#include "mem.h"
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int executecmd(char *cmd, char *args, int useenv);
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int executearg0(char *cmd, char *args);
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/*****************************
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* Run the linker. Return status of execution.
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*/
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int runLINK()
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{
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#if _WIN32
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assert(0 && "linking not done for win32");
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char *p;
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int i;
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int status;
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OutBuffer cmdbuf;
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global.params.libfiles->push((void *) "user32");
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global.params.libfiles->push((void *) "kernel32");
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for (i = 0; i < global.params.objfiles->dim; i++)
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{
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if (i)
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cmdbuf.writeByte('+');
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p = (char *)global.params.objfiles->data[i];
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char *ext = FileName::ext(p);
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if (ext)
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cmdbuf.write(p, ext - p - 1);
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else
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cmdbuf.writestring(p);
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}
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cmdbuf.writeByte(',');
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if (global.params.exefile)
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cmdbuf.writestring(global.params.exefile);
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else
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{ // Generate exe file name from first obj name
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char *n = (char *)global.params.objfiles->data[0];
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char *ex;
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n = FileName::name(n);
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FileName *fn = FileName::forceExt(n, "exe");
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global.params.exefile = fn->toChars();
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}
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// Make sure path to exe file exists
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{ char *p = FileName::path(global.params.exefile);
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FileName::ensurePathExists(p);
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mem.free(p);
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}
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cmdbuf.writeByte(',');
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if (global.params.run)
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cmdbuf.writestring("nul");
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// if (mapfile)
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// cmdbuf.writestring(output);
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cmdbuf.writeByte(',');
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for (i = 0; i < global.params.libfiles->dim; i++)
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{
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if (i)
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cmdbuf.writeByte('+');
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cmdbuf.writestring((char *) global.params.libfiles->data[i]);
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}
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if (global.params.deffile)
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{
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cmdbuf.writeByte(',');
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cmdbuf.writestring(global.params.deffile);
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}
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/* Eliminate unnecessary trailing commas */
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while (1)
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{ i = cmdbuf.offset;
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if (!i || cmdbuf.data[i - 1] != ',')
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break;
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cmdbuf.offset--;
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}
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if (global.params.resfile)
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{
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cmdbuf.writestring("/RC:");
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cmdbuf.writestring(global.params.resfile);
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}
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#if 0
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if (mapfile)
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cmdbuf.writestring("/m");
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if (debuginfo)
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cmdbuf.writestring("/li");
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if (codeview)
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{
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cmdbuf.writestring("/co");
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if (codeview3)
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cmdbuf.writestring(":3");
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}
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#else
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if (global.params.symdebug)
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cmdbuf.writestring("/co");
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#endif
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cmdbuf.writestring("/noi");
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for (i = 0; i < global.params.linkswitches->dim; i++)
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{
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cmdbuf.writestring((char *) global.params.linkswitches->data[i]);
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}
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cmdbuf.writeByte(';');
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p = cmdbuf.toChars();
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FileName *lnkfilename = NULL;
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size_t plen = strlen(p);
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if (plen > 7000)
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{
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lnkfilename = FileName::forceExt(global.params.exefile, "lnk");
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File flnk(lnkfilename);
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flnk.setbuffer(p, plen);
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flnk.ref = 1;
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if (flnk.write())
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error("error writing file %s", lnkfilename);
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if (lnkfilename->len() < plen)
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sprintf(p, "@%s", lnkfilename->toChars());
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}
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char *linkcmd = getenv("LINKCMD");
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if (!linkcmd)
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linkcmd = "link";
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status = executecmd(linkcmd, p, 1);
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if (lnkfilename)
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{
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remove(lnkfilename->toChars());
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delete lnkfilename;
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}
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return status;
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#elif linux
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pid_t childpid;
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int i;
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int status;
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// Build argv[]
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Array argv;
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//char *cc = getenv("CC");
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//if (!cc)
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//cc = "gcc";
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char *cc = "llvm-ld";
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argv.push((void *)cc);
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// None of that a.out stuff. Use explicit exe file name, or
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// generate one from name of first source file.
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OutBuffer* exestr = new OutBuffer;
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if (global.params.exefile)
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{
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exestr->printf("-o=%s", global.params.exefile);
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argv.push(exestr->toChars());
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}
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else
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{ // Generate exe file name from first obj name
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char *n = (char *)global.params.objfiles->data[0];
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char *e;
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char *ex;
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n = FileName::name(n);
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e = FileName::ext(n);
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if (e)
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{
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e--; // back up over '.'
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ex = (char *)mem.malloc(e - n + 1);
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memcpy(ex, n, e - n);
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ex[e - n] = 0;
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}
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else
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ex = (char *)"a.out"; // no extension, so give up
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exestr->printf("-o=%s", ex);
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ex = exestr->toChars();
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argv.push(ex);
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global.params.exefile = ex;
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}
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// Make sure path to exe file exists
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{ char *p = FileName::path(global.params.exefile);
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FileName::ensurePathExists(p);
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mem.free(p);
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}
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argv.insert(argv.dim, global.params.libfiles);
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//if (global.params.symdebug)
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//argv.push((void *)"-g");
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//argv.push((void *)"-m32");
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if (!global.params.optimize)
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argv.push((void *)"-disable-opt");
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else {
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const char* s = 0;
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switch(global.params.optimizeLevel) {
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case 0:
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s = "-O0"; break;
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case 1:
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s = "-O1"; break;
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case 2:
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s = "-O2"; break;
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case 3:
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s = "-O3"; break;
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case 4:
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s = "-O4"; break;
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case 5:
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s = "-O5"; break;
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default:
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assert(0);
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}
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argv.push((void*)s);
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}
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#if 0
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if (0 && global.params.exefile)
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{
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/* This switch enables what is known as 'smart linking'
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* in the Windows world, where unreferenced sections
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* are removed from the executable. It eliminates unreferenced
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* functions, essentially making a 'library' out of a module.
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* Although it is documented to work with ld version 2.13,
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* in practice it does not, but just seems to be ignored.
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* Thomas Kuehne has verified that it works with ld 2.16.1.
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* BUG: disabled because it causes exception handling to fail
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*/
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argv.push((void *)"-Xlinker");
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argv.push((void *)"--gc-sections");
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}
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#endif
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for (i = 0; i < global.params.linkswitches->dim; i++)
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{ char *p = (char *)global.params.linkswitches->data[i];
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//if (!p || !p[0] || !(p[0] == '-' && p[1] == 'l'))
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//{ // Don't need -Xlinker if switch starts with -l
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// argv.push((void *)"-Xlinker");
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//}
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argv.push((void *) p);
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}
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argv.push((void*)"-native");
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/* Standard libraries must go after user specified libraries
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* passed with -l.
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*/
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//argv.push((void *)"-lphobos"); // turns into /usr/lib/libphobos.a
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//argv.push((void *)"-lpthread");
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//argv.push((void *)"-lm");
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std::string corelibpath = global.params.runtimeImppath;
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corelibpath.append("/llvmdcore.bc");
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argv.append(global.params.objfiles);
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argv.push((void *)corelibpath.c_str());
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if (!global.params.quiet)
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{
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// Print it
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for (i = 0; i < argv.dim; i++)
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printf("%s ", (char *)argv.data[i]);
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printf("\n");
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fflush(stdout);
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}
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argv.push(NULL);
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childpid = fork();
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if (childpid == 0)
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{
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execvp((char *)argv.data[0], (char **)argv.data);
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perror((char *)argv.data[0]); // failed to execute
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return -1;
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}
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waitpid(childpid, &status, 0);
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status=WEXITSTATUS(status);
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if (status)
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printf("--- errorlevel %d\n", status);
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return status;
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#else
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printf ("Linking is not yet supported for this version of LLVMDMD.\n");
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return -1;
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#endif
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}
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/**********************************
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* Delete generated EXE file.
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*/
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void deleteExeFile()
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{
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if (global.params.exefile)
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{
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//printf("deleteExeFile() %s\n", global.params.exefile);
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remove(global.params.exefile);
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}
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}
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/******************************
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* Execute a rule. Return the status.
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* cmd program to run
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* args arguments to cmd, as a string
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* useenv if cmd knows about _CMDLINE environment variable
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*/
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#if _WIN32
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int executecmd(char *cmd, char *args, int useenv)
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{
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int status;
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char *buff;
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size_t len;
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if (!global.params.quiet || global.params.verbose)
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{
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printf("%s %s\n", cmd, args);
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fflush(stdout);
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}
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if ((len = strlen(args)) > 255)
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{ char *q;
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static char envname[] = "@_CMDLINE";
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envname[0] = '@';
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switch (useenv)
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{ case 0: goto L1;
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case 2: envname[0] = '%'; break;
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}
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q = (char *) alloca(sizeof(envname) + len + 1);
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sprintf(q,"%s=%s", envname + 1, args);
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status = putenv(q);
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if (status == 0)
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args = envname;
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else
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{
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L1:
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error("command line length of %d is too long",len);
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}
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}
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status = executearg0(cmd,args);
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#if _WIN32
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if (status == -1)
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status = spawnlp(0,cmd,cmd,args,NULL);
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#endif
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// if (global.params.verbose)
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// printf("\n");
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if (status)
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{
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if (status == -1)
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printf("Can't run '%s', check PATH\n", cmd);
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else
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printf("--- errorlevel %d\n", status);
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}
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return status;
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}
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#endif
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/**************************************
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* Attempt to find command to execute by first looking in the directory
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* where DMD was run from.
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* Returns:
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* -1 did not find command there
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* !=-1 exit status from command
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*/
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#if _WIN32
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int executearg0(char *cmd, char *args)
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{
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char *file;
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char *argv0 = global.params.argv0;
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//printf("argv0='%s', cmd='%s', args='%s'\n",argv0,cmd,args);
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// If cmd is fully qualified, we don't do this
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if (FileName::absolute(cmd))
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return -1;
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file = FileName::replaceName(argv0, cmd);
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//printf("spawning '%s'\n",file);
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#if _WIN32
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return spawnl(0,file,file,args,NULL);
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#elif linux
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char *full;
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int cmdl = strlen(cmd);
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full = (char*) mem.malloc(cmdl + strlen(args) + 2);
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if (full == NULL)
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return 1;
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strcpy(full, cmd);
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full [cmdl] = ' ';
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strcpy(full + cmdl + 1, args);
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int result = system(full);
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mem.free(full);
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return result;
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#else
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assert(0);
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#endif
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}
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#endif
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/***************************************
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* Run the compiled program.
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* Return exit status.
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*/
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int runProgram()
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{
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//printf("runProgram()\n");
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if (global.params.verbose)
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{
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printf("%s", global.params.exefile);
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for (size_t i = 0; i < global.params.runargs_length; i++)
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printf(" %s", (char *)global.params.runargs[i]);
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printf("\n");
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}
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// Build argv[]
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Array argv;
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argv.push((void *)global.params.exefile);
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for (size_t i = 0; i < global.params.runargs_length; i++)
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{ char *a = global.params.runargs[i];
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#if _WIN32
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// BUG: what about " appearing in the string?
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if (strchr(a, ' '))
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{ char *b = (char *)mem.malloc(3 + strlen(a));
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sprintf(b, "\"%s\"", a);
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a = b;
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}
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#endif
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argv.push((void *)a);
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}
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argv.push(NULL);
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#if _WIN32
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char *ex = FileName::name(global.params.exefile);
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if (ex == global.params.exefile)
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ex = FileName::combine(".", ex);
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else
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ex = global.params.exefile;
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return spawnv(0,ex,(char **)argv.data);
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#elif linux
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pid_t childpid;
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int status;
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childpid = fork();
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if (childpid == 0)
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||||
{
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char *fn = (char *)argv.data[0];
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||||
if (!FileName::absolute(fn))
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||||
{ // Make it "./fn"
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fn = FileName::combine(".", fn);
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}
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execv(fn, (char **)argv.data);
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perror(fn); // failed to execute
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||||
return -1;
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||||
}
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||||
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||||
waitpid(childpid, &status, 0);
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status = WEXITSTATUS(status);
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return status;
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#else
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assert(0);
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||||
#endif
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||||
}
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||||
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