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https://github.com/ldc-developers/ldc.git
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bb5b60e591
I have seen it used several times in benchmarks comparing it to 'gdc -O3' and 'dmd -O -inline' now, so people apparently expect it to yield the highest available optimization level.
964 lines
30 KiB
C++
964 lines
30 KiB
C++
//===-- ldmd.cpp - Drop-in DMD replacement wrapper for LDC ----------------===//
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//
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// LDC – the LLVM D compiler
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//
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// This file is distributed under the BSD-style LDC license, except for the
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// command line handling code, which originated from DMD. See the LICENSE
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// file for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Wrapper allowing use of LDC as drop-in replacement for DMD.
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//
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// The reason why full command line parsing is required instead of just
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// rewriting the names of a few switches is an annoying impedance mismatch
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// between the way how DMD handles arguments and the LLVM command line library:
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// DMD allows all switches to be specified multiple times – in case of
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// conflicts, the last one takes precedence. There is no easy way to replicate
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// this behavior with LLVM, save parsing the switches and re-emitting a cleaned
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// up string.
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//
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// DMD also reads switches from the DFLAGS enviroment variable, if present. This
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// is contrary to what C compilers do, where CFLAGS is usually handled by the
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// build system. Thus, conflicts like mentioned above occur quite frequently in
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// practice in makefiles written for DMD, as DFLAGS is also a natural name for
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// handling flags there.
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//
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// In order to maintain backwards compatibility with earlier versions of LDMD,
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// unknown switches are passed through verbatim to LDC. Finding a better
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// solution for this is tricky, as some of the LLVM arguments can be
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// intentionally specified multiple times to get a certain effect (e.g. pass,
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// linker options).
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//
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// Just as with the old LDMD script, arguments can be passed through unmodified
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// to LDC by using -Csomearg.
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//
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// If maintaining this wrapper is deemed too messy at some point, an alternative
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// would be to either extend the LLVM command line library to support the DMD
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// semantics (unlikely to happen), or to abandon it altogether (except for
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// passing the LLVM-defined flags to the various passes).
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//
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// Note: This program inherited ugly C-style string handling and memory leaks
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// from DMD, but this should not be a problem due to the short-livedness of
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// the process.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LDC_EXE_NAME
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# error "Please define LDC_EXE_NAME to the name of the LDC executable to use."
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#endif
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Program.h"
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#include "llvm/Support/SystemUtils.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cassert>
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#include <cerrno>
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#include <climits>
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#include <cstdarg>
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#include <cstdio>
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#include <cstdlib>
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#include <numeric>
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#include <vector>
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#ifdef HAVE_SC_ARG_MAX
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# include <unistd.h>
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#endif
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namespace ls = llvm::sys;
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// We reuse DMD's response file parsing routine for maximum compatibilty - it
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// handles quotes in a very peciuliar way.
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int response_expand(size_t *pargc, char ***pargv);
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void browse(const char *url);
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/**
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* Prints a formatted error message to stderr and exits the program.
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*/
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void error(const char* fmt, ...)
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{
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va_list argp;
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va_start(argp, fmt);
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fprintf(stderr, "Error: ");
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vfprintf(stderr, fmt, argp);
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fprintf(stderr, "\n");
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exit(EXIT_FAILURE);
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va_end(argp);
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}
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/**
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* Prints a formatted warning message to stderr.
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*/
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void warning(const char* fmt, ...)
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{
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va_list argp;
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va_start(argp, fmt);
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fprintf(stderr, "Warning: ");
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vfprintf(stderr, fmt, argp);
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fprintf(stderr, "\n");
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va_end(argp);
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}
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char* concat(const char* a, const char* b)
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{
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size_t na = strlen(a);
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size_t nb = strlen(b);
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char* result = static_cast<char*>(malloc(na + nb + 1));
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assert(result);
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memcpy(result, a, na);
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memcpy(result + na, b, nb + 1);
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return result;
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}
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char* concat(const char* a, int b)
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{
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char bStr[14];
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#if defined(_MSC_VER)
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_snprintf_s(bStr, _countof(bStr), sizeof(bStr), "%d", b);
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#else
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snprintf(bStr, sizeof(bStr), "%d", b);
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#endif
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return concat(a, bStr);
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}
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/**
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* Runs the given executable, returning its error code.
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*/
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int execute(ls::Path exePath, const char** args)
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{
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std::string errorMsg;
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int rc = ls::Program::ExecuteAndWait(exePath, args, NULL, NULL,
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0, 0, &errorMsg);
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if (!errorMsg.empty())
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{
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error("Could not execute %s: %s", exePath.c_str(), errorMsg.c_str());
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}
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return rc;
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}
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/**
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* Prints usage information to stdout.
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*/
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void printUsage(const char* argv0, ls::Path ldcPath)
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{
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// Print version information by actually invoking ldc -version.
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const char* args[] = { ldcPath.c_str(), "-version", NULL };
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execute(ldcPath, args);
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printf("\n\
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Usage:\n\
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%s files.d ... { -switch }\n\
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\n\
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files.d D source files\n\
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@cmdfile read arguments from cmdfile\n\
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-c do not link\n"
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#if 0
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" -cov do code coverage analysis\n"
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#endif
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" -D generate documentation\n\
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-Dddocdir write documentation file to docdir directory\n\
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-Dffilename write documentation file to filename\n\
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-d allow deprecated features\n\
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-debug compile in debug code\n\
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-debug=level compile in debug code <= level\n\
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-debug=ident compile in debug code identified by ident\n\
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-debuglib=name set symbolic debug library to name\n\
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-defaultlib=name set default library to name\n\
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-deps=filename write module dependencies to filename\n\
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-fPIC generate position independent code\n\
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-g add symbolic debug info\n\
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-gc add symbolic debug info, pretend to be C\n\
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-gs always emit stack frame\n\
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-H generate 'header' file\n\
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-Hddirectory write 'header' file to directory\n\
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-Hffilename write 'header' file to filename\n\
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--help print help\n\
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-Ipath where to look for imports\n\
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-ignore ignore unsupported pragmas\n\
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-inline do function inlining\n\
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-Jpath where to look for string imports\n\
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-Llinkerflag pass linkerflag to link\n\
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-lib generate library rather than object files\n\
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-m32 generate 32 bit code\n\
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-m64 generate 64 bit code\n\
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-man open web browser on manual page\n"
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#if 0
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" -map generate linker .map file\n"
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#endif
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" -noboundscheck turns off array bounds checking for all functions\n"
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" -nofloat do not emit reference to floating point\n\
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-O optimize\n\
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-o- do not write object file\n\
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-odobjdir write object & library files to directory objdir\n\
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-offilename name output file to filename\n\
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-op do not strip paths from source file\n"
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#if 0
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" -profile profile runtime performance of generated code\n"
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#endif
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" -property enforce property syntax\n\
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-quiet suppress unnecessary messages\n\
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-release compile release version\n\
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-run srcfile args... run resulting program, passing args\n\
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-shared generate shared library\n\
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-unittest compile in unit tests\n\
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-v verbose\n\
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-vdmd print the command used to invoke the underlying compiler\n\
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-version=level compile in version code >= level\n\
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-version=ident compile in version code identified by ident\n"
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#if 0
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" -vtls list all variables going into thread local storage\n"
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#endif
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" -w enable warnings\n\
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-wi enable informational warnings\n\
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-X generate JSON file\n\
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-Xffilename write JSON file to filename\n\n", argv0
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);
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}
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/**
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* Parses an enviroment variable for flags and appends them to given list of
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* arguments.
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*
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* This corresponds to getenv_setargv() in DMD, but we need to duplicate it
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* here since it is defined in mars.c.
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*/
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void appendEnvVar(const char* envVarName, std::vector<char*>& args)
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{
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char *env = getenv(envVarName);
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if (!env)
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return;
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env = strdup(env); // create our own writable copy
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size_t j = 1; // leave argv[0] alone
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while (1)
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{
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switch (*env)
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{
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case ' ':
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case '\t':
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env++;
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break;
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case 0:
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return;
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default:
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args.push_back(env); // append
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j++;
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char* p = env;
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int slash = 0;
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int instring = 0;
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char c = 0;
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while (1)
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{
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c = *env++;
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switch (c)
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{
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case '"':
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p -= (slash >> 1);
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if (slash & 1)
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{ p--;
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goto Laddc;
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}
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instring ^= 1;
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slash = 0;
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continue;
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case ' ':
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case '\t':
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if (instring)
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goto Laddc;
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*p = 0;
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break;
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case '\\':
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slash++;
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*p++ = c;
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continue;
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case 0:
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*p = 0;
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return;
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default:
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Laddc:
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slash = 0;
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*p++ = c;
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continue;
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}
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break;
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}
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}
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}
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}
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struct Debug
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{
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enum Type
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{
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none,
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normal,
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pretendC
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};
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};
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struct Model
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{
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enum Type
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{
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automatic,
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m32,
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m64
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};
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};
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struct Warnings
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{
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enum Type
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{
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none,
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asErrors,
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informational
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};
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};
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struct Params
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{
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bool allowDeprecated;
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bool compileOnly;
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bool coverage;
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bool emitSharedLib;
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bool pic;
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bool emitMap;
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bool multiObj;
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Debug::Type debugInfo;
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bool alwaysStackFrame;
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Model::Type targetModel;
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bool profile;
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bool verbose;
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bool vdmd;
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bool logTlsUse;
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Warnings::Type warnings;
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bool optimize;
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bool noObj;
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char* objDir;
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char* objName;
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bool preservePaths;
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bool generateDocs;
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char* docDir;
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char* docName;
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bool generateHeaders;
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char* headerDir;
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||
char* headerName;
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||
bool generateJson;
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||
char* jsonName;
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||
bool ignoreUnsupportedPragmas;
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||
bool enforcePropertySyntax;
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||
bool enableInline;
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||
bool emitStaticLib;
|
||
bool noFloat;
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||
bool quiet;
|
||
bool release;
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||
bool noBoundsChecks;
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||
bool emitUnitTests;
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||
std::vector<char*> modulePaths;
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||
std::vector<char*> importPaths;
|
||
bool debugFlag;
|
||
unsigned debugLevel;
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||
std::vector<char*> debugIdentifiers;
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||
unsigned versionLevel;
|
||
std::vector<char*> versionIdentifiers;
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||
std::vector<char*> linkerSwitches;
|
||
char* defaultLibName;
|
||
char* debugLibName;
|
||
char* moduleDepsFile;
|
||
|
||
bool hiddenDebugB;
|
||
bool hiddenDebugC;
|
||
bool hiddenDebugF;
|
||
bool hiddenDebugR;
|
||
bool hiddenDebugX;
|
||
bool hiddenDebugY;
|
||
|
||
std::vector<char*> unknownSwitches;
|
||
|
||
bool run;
|
||
std::vector<char*> files;
|
||
std::vector<char*> runArgs;
|
||
|
||
Params()
|
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:
|
||
allowDeprecated(false),
|
||
compileOnly(false),
|
||
coverage(false),
|
||
emitSharedLib(false),
|
||
pic(false),
|
||
emitMap(false),
|
||
multiObj(false),
|
||
alwaysStackFrame(false),
|
||
profile(false),
|
||
verbose(false),
|
||
vdmd(false),
|
||
logTlsUse(false),
|
||
optimize(false),
|
||
noObj(false),
|
||
objDir(0),
|
||
objName(0),
|
||
preservePaths(false),
|
||
generateDocs(false),
|
||
docDir(0),
|
||
docName(0),
|
||
generateHeaders(false),
|
||
headerDir(0),
|
||
headerName(0),
|
||
generateJson(false),
|
||
jsonName(0),
|
||
ignoreUnsupportedPragmas(false),
|
||
enforcePropertySyntax(false),
|
||
enableInline(false),
|
||
emitStaticLib(false),
|
||
noFloat(false),
|
||
quiet(false),
|
||
release(false),
|
||
noBoundsChecks(false),
|
||
emitUnitTests(false),
|
||
debugFlag(false),
|
||
debugLevel(0),
|
||
versionLevel(0),
|
||
defaultLibName(0),
|
||
debugLibName(0),
|
||
moduleDepsFile(0),
|
||
hiddenDebugB(false),
|
||
hiddenDebugC(false),
|
||
hiddenDebugF(false),
|
||
hiddenDebugR(false),
|
||
hiddenDebugX(false),
|
||
hiddenDebugY(false),
|
||
run(false)
|
||
{ }
|
||
};
|
||
|
||
/**
|
||
* Parses the flags from the given command line and the DFLAGS environment
|
||
* variable into a Params struct.
|
||
*/
|
||
Params parseArgs(size_t originalArgc, char** originalArgv, ls::Path ldcPath)
|
||
{
|
||
// Expand any response files present into the list of arguments.
|
||
size_t argc = originalArgc;
|
||
char** argv = originalArgv;
|
||
if (response_expand(&argc, &argv))
|
||
{
|
||
error("Could not read response file.");
|
||
}
|
||
|
||
std::vector<char*> args(argv, argv + argc);
|
||
|
||
appendEnvVar("DFLAGS", args);
|
||
|
||
Params result = Params();
|
||
for (size_t i = 1; i < args.size(); i++)
|
||
{
|
||
char* p = args[i];
|
||
if (*p == '-')
|
||
{
|
||
if (strcmp(p + 1, "d") == 0)
|
||
result.allowDeprecated = true;
|
||
else if (strcmp(p + 1, "c") == 0)
|
||
result.compileOnly = true;
|
||
else if (strcmp(p + 1, "cov") == 0)
|
||
result.coverage = true;
|
||
else if (strcmp(p + 1, "shared") == 0
|
||
// backwards compatibility with old switch
|
||
|| strcmp(p + 1, "dylib") == 0
|
||
)
|
||
result.emitSharedLib = true;
|
||
else if (strcmp(p + 1, "fPIC") == 0)
|
||
result.pic = true;
|
||
else if (strcmp(p + 1, "map") == 0)
|
||
result.emitMap = true;
|
||
else if (strcmp(p + 1, "multiobj") == 0)
|
||
result.multiObj = true;
|
||
else if (strcmp(p + 1, "g") == 0)
|
||
result.debugInfo = Debug::normal;
|
||
else if (strcmp(p + 1, "gc") == 0)
|
||
result.debugInfo = Debug::pretendC;
|
||
else if (strcmp(p + 1, "gs") == 0)
|
||
result.alwaysStackFrame = true;
|
||
else if (strcmp(p + 1, "gt") == 0)
|
||
error("use -profile instead of -gt\n");
|
||
else if (strcmp(p + 1, "m32") == 0)
|
||
result.targetModel = Model::m32;
|
||
else if (strcmp(p + 1, "m64") == 0)
|
||
result.targetModel = Model::m64;
|
||
else if (strcmp(p + 1, "profile") == 0)
|
||
result.profile = true;
|
||
else if (strcmp(p + 1, "v") == 0)
|
||
result.verbose = true;
|
||
else if (strcmp(p + 1, "vdmd") == 0)
|
||
result.vdmd = true;
|
||
else if (strcmp(p + 1, "vtls") == 0)
|
||
result.logTlsUse = true;
|
||
else if (strcmp(p + 1, "v1") == 0)
|
||
{
|
||
error("use DMD 1.0 series compilers for -v1 switch");
|
||
break;
|
||
}
|
||
else if (strcmp(p + 1, "w") == 0)
|
||
result.warnings = Warnings::asErrors;
|
||
else if (strcmp(p + 1, "wi") == 0)
|
||
result.warnings = Warnings::informational;
|
||
else if (strcmp(p + 1, "O") == 0)
|
||
result.optimize = true;
|
||
else if (p[1] == 'o')
|
||
{
|
||
switch (p[2])
|
||
{
|
||
case '-':
|
||
result.noObj = true;
|
||
break;
|
||
|
||
case 'd':
|
||
if (!p[3])
|
||
goto Lnoarg;
|
||
result.objDir = p + 3;
|
||
break;
|
||
|
||
case 'f':
|
||
if (!p[3])
|
||
goto Lnoarg;
|
||
result.objName = p + 3;
|
||
break;
|
||
|
||
case 'p':
|
||
if (p[3])
|
||
goto Lerror;
|
||
result.preservePaths = 1;
|
||
break;
|
||
|
||
case 0:
|
||
error("-o no longer supported, use -of or -od");
|
||
break;
|
||
|
||
default:
|
||
goto Lerror;
|
||
}
|
||
}
|
||
else if (p[1] == 'D')
|
||
{
|
||
result.generateDocs = true;
|
||
switch (p[2])
|
||
{
|
||
case 'd':
|
||
if (!p[3])
|
||
goto Lnoarg;
|
||
result.docDir = p + 3;
|
||
break;
|
||
case 'f':
|
||
if (!p[3])
|
||
goto Lnoarg;
|
||
result.docName = p + 3;
|
||
break;
|
||
|
||
case 0:
|
||
break;
|
||
|
||
default:
|
||
goto Lerror;
|
||
}
|
||
}
|
||
else if (p[1] == 'H')
|
||
{
|
||
result.generateHeaders = true;
|
||
switch (p[2])
|
||
{
|
||
case 'd':
|
||
if (!p[3])
|
||
goto Lnoarg;
|
||
result.headerDir = p + 3;
|
||
break;
|
||
|
||
case 'f':
|
||
if (!p[3])
|
||
goto Lnoarg;
|
||
result.headerName = p + 3;
|
||
break;
|
||
|
||
case 0:
|
||
break;
|
||
|
||
default:
|
||
goto Lerror;
|
||
}
|
||
}
|
||
else if (p[1] == 'X')
|
||
{
|
||
result.generateJson = true;
|
||
switch (p[2])
|
||
{
|
||
case 'f':
|
||
if (!p[3])
|
||
goto Lnoarg;
|
||
result.jsonName = p + 3;
|
||
break;
|
||
|
||
case 0:
|
||
break;
|
||
|
||
default:
|
||
goto Lerror;
|
||
}
|
||
}
|
||
else if (strcmp(p + 1, "ignore") == 0)
|
||
result.ignoreUnsupportedPragmas = true;
|
||
else if (strcmp(p + 1, "property") == 0)
|
||
result.enforcePropertySyntax = true;
|
||
else if (strcmp(p + 1, "inline") == 0)
|
||
result.enableInline = true;
|
||
else if (strcmp(p + 1, "lib") == 0)
|
||
result.emitStaticLib = true;
|
||
else if (strcmp(p + 1, "nofloat") == 0)
|
||
result.noFloat = 1;
|
||
else if (strcmp(p + 1, "quiet") == 0)
|
||
result.quiet = 1;
|
||
else if (strcmp(p + 1, "release") == 0)
|
||
result.release = 1;
|
||
else if (strcmp(p + 1, "noboundscheck") == 0)
|
||
result.noBoundsChecks = 1;
|
||
else if (strcmp(p + 1, "unittest") == 0)
|
||
result.emitUnitTests = 1;
|
||
else if (p[1] == 'I')
|
||
result.modulePaths.push_back(p + 2);
|
||
else if (p[1] == 'J')
|
||
result.importPaths.push_back(p + 2);
|
||
else if (memcmp(p + 1, "debug", 5) == 0 && p[6] != 'l')
|
||
{
|
||
// Parse:
|
||
// -debug
|
||
// -debug=number
|
||
// -debug=identifier
|
||
if (p[6] == '=')
|
||
{
|
||
if (isdigit((unsigned char)p[7]))
|
||
{ long level;
|
||
|
||
errno = 0;
|
||
level = strtol(p + 7, &p, 10);
|
||
if (*p || errno || level > INT_MAX)
|
||
goto Lerror;
|
||
result.debugLevel = (int)level;
|
||
}
|
||
else
|
||
result.debugIdentifiers.push_back(p + 7);
|
||
}
|
||
else if (p[6])
|
||
goto Lerror;
|
||
else
|
||
result.debugFlag = true;
|
||
}
|
||
else if (memcmp(p + 1, "version", 5) == 0)
|
||
{
|
||
// Parse:
|
||
// -version=number
|
||
// -version=identifier
|
||
if (p[8] == '=')
|
||
{
|
||
if (isdigit((unsigned char)p[9]))
|
||
{ long level;
|
||
|
||
errno = 0;
|
||
level = strtol(p + 9, &p, 10);
|
||
if (*p || errno || level > INT_MAX)
|
||
goto Lerror;
|
||
result.versionLevel = (int)level;
|
||
}
|
||
else
|
||
result.versionIdentifiers.push_back(p + 9);
|
||
}
|
||
else
|
||
goto Lerror;
|
||
}
|
||
else if (strcmp(p + 1, "-b") == 0)
|
||
result.hiddenDebugB = 1;
|
||
else if (strcmp(p + 1, "-c") == 0)
|
||
result.hiddenDebugC = 1;
|
||
else if (strcmp(p + 1, "-f") == 0)
|
||
result.hiddenDebugF = 1;
|
||
else if (strcmp(p + 1, "-help") == 0)
|
||
{
|
||
printUsage(originalArgv[0], ldcPath);
|
||
exit(EXIT_SUCCESS);
|
||
}
|
||
else if (strcmp(p + 1, "-r") == 0)
|
||
result.hiddenDebugR = 1;
|
||
else if (strcmp(p + 1, "-x") == 0)
|
||
result.hiddenDebugX = 1;
|
||
else if (strcmp(p + 1, "-y") == 0)
|
||
result.hiddenDebugY = 1;
|
||
else if (p[1] == 'L')
|
||
{
|
||
result.linkerSwitches.push_back(p + 2);
|
||
}
|
||
else if (memcmp(p + 1, "defaultlib=", 11) == 0)
|
||
{
|
||
result.defaultLibName = p + 1 + 11;
|
||
}
|
||
else if (memcmp(p + 1, "debuglib=", 9) == 0)
|
||
{
|
||
result.debugLibName = p + 1 + 9;
|
||
}
|
||
else if (memcmp(p + 1, "deps=", 5) == 0)
|
||
{
|
||
result.moduleDepsFile = p + 1 + 5;
|
||
if (!result.moduleDepsFile[0])
|
||
goto Lnoarg;
|
||
}
|
||
else if (memcmp(p + 1, "man", 3) == 0)
|
||
{
|
||
browse("http://ldc-developers.github.com");
|
||
exit(EXIT_SUCCESS);
|
||
}
|
||
else if (strcmp(p + 1, "run") == 0)
|
||
{
|
||
result.run = true;
|
||
int runargCount = ((i >= originalArgc) ? argc : originalArgc) - i - 1;
|
||
if (runargCount)
|
||
{
|
||
result.files.push_back(argv[i + 1]);
|
||
result.runArgs = std::vector<char*>(argv + i + 2, argv + i + runargCount + 1);
|
||
i += runargCount;
|
||
}
|
||
else
|
||
{
|
||
result.run = false;
|
||
goto Lnoarg;
|
||
}
|
||
}
|
||
else if (p[1] == 'C')
|
||
{
|
||
result.unknownSwitches.push_back(concat("-", p + 2));
|
||
}
|
||
else
|
||
{
|
||
Lerror:
|
||
result.unknownSwitches.push_back(p);
|
||
continue;
|
||
|
||
Lnoarg:
|
||
error("argument expected for switch '%s'", p);
|
||
continue;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
// FIXME: #if TARGET_WINDOS
|
||
llvm::StringRef ext = ls::path::extension(p);
|
||
if (ext.equals_lower("exe"))
|
||
{
|
||
result.objName = p;
|
||
continue;
|
||
}
|
||
// #endif
|
||
result.files.push_back(p);
|
||
}
|
||
}
|
||
if (result.files.empty())
|
||
{
|
||
printUsage(originalArgv[0], ldcPath);
|
||
error("No source file specified.");
|
||
}
|
||
return result;
|
||
}
|
||
|
||
void pushSwitches(const char* prefix, const std::vector<char*>& vals, std::vector<const char*>& r)
|
||
{
|
||
typedef std::vector<char*>::const_iterator It;
|
||
for (It it = vals.begin(), end = vals.end(); it != end; ++it)
|
||
{
|
||
r.push_back(concat(prefix, *it));
|
||
}
|
||
}
|
||
|
||
/**
|
||
* Appends the LDC command line parameters corresponding to the given set of
|
||
* parameters to r.
|
||
*/
|
||
void buildCommandLine(std::vector<const char*>& r, const Params& p)
|
||
{
|
||
if (p.allowDeprecated) r.push_back("-d");
|
||
if (p.compileOnly) r.push_back("-c");
|
||
if (p.coverage) warning("Coverage report generation not yet supported by LDC.");
|
||
if (p.emitSharedLib) r.push_back("-shared");
|
||
if (p.pic) r.push_back("-relocation-model=pic");
|
||
if (p.emitMap) warning("Map file generation not yet supported by LDC.");
|
||
// LDMD historically did not enable singleobj mode, so in order not to
|
||
// break build systems as a D1 parting gift, don't change this right now.
|
||
// This might change based on user feedback, though.
|
||
if (!p.multiObj) r.push_back("-singleobj");
|
||
if (p.debugInfo == Debug::normal) r.push_back("-g");
|
||
else if (p.debugInfo == Debug::pretendC) r.push_back("-gc");
|
||
if (p.alwaysStackFrame) r.push_back("-disable-fp-elim");
|
||
if (p.targetModel == Model::m32) r.push_back("-m32");
|
||
else if (p.targetModel == Model::m32) r.push_back("-m64");
|
||
if (p.profile) warning("CPU profile generation not yet supported by LDC.");
|
||
if (p.verbose) r.push_back("-v");
|
||
if (p.logTlsUse) warning("-vtls not yet supported by LDC.");
|
||
if (p.warnings == Warnings::asErrors) r.push_back("-w");
|
||
else if (p.warnings == Warnings::informational) r.push_back("-wi");
|
||
if (p.optimize) r.push_back("-O3");
|
||
if (p.noObj) r.push_back("-o-");
|
||
if (p.objDir) r.push_back(concat("-od=", p.objDir));
|
||
if (p.objName) r.push_back(concat("-of=", p.objName));
|
||
if (p.preservePaths) r.push_back("-op");
|
||
if (p.generateDocs) r.push_back("-D");
|
||
if (p.docDir) r.push_back(concat("-Dd=", p.docDir));
|
||
if (p.docName) r.push_back(concat("-Df=", p.docName));
|
||
if (p.generateHeaders) r.push_back("-H");
|
||
if (p.headerDir) r.push_back(concat("-Hd=", p.headerDir));
|
||
if (p.headerName) r.push_back(concat("-Hf=", p.headerName));
|
||
if (p.generateJson) r.push_back("-X");
|
||
if (p.jsonName) r.push_back(concat("-Xf=", p.jsonName));
|
||
if (p.ignoreUnsupportedPragmas) r.push_back("-ignore");
|
||
if (p.enforcePropertySyntax) r.push_back("-property");
|
||
if (p.enableInline) r.push_back("-enable-inlining");
|
||
if (p.emitStaticLib) r.push_back("-lib");
|
||
if (p.noFloat) warning("-nofloat is ignored by LDC.");
|
||
if (p.quiet) r.push_back("-quiet"); // Undocumented.
|
||
if (p.release) r.push_back("-release"); // Also disables boundscheck.
|
||
if (p.noBoundsChecks) r.push_back("-disable-boundscheck");
|
||
if (p.emitUnitTests) r.push_back("-unittest");
|
||
pushSwitches("-I=", p.modulePaths, r);
|
||
pushSwitches("-J=", p.importPaths, r);
|
||
if (p.debugFlag) r.push_back("-d-debug");
|
||
if (p.debugLevel) r.push_back(concat("-d-debug=", p.debugLevel));
|
||
pushSwitches("-d-debug=", p.debugIdentifiers, r);
|
||
if (p.versionLevel) r.push_back(concat("-d-version=", p.versionLevel));
|
||
pushSwitches("-d-version=", p.versionIdentifiers, r);
|
||
pushSwitches("-L=", p.linkerSwitches, r);
|
||
if (p.defaultLibName) r.push_back(concat("-defaultlib=", p.defaultLibName));
|
||
if (p.debugLibName) r.push_back(concat("-debuglib=", p.debugLibName));
|
||
if (p.moduleDepsFile) r.push_back(concat("-deps=", p.moduleDepsFile));
|
||
if (p.hiddenDebugB) r.push_back("-hidden-debug-b");
|
||
if (p.hiddenDebugC) r.push_back("-hidden-debug-c");
|
||
if (p.hiddenDebugF) r.push_back("-hidden-debug-f");
|
||
if (p.hiddenDebugR) r.push_back("-hidden-debug-r");
|
||
if (p.hiddenDebugX) r.push_back("-hidden-debug-x");
|
||
if (p.hiddenDebugY) r.push_back("-hidden-debug-y");
|
||
r.insert(r.end(), p.unknownSwitches.begin(), p.unknownSwitches.end());
|
||
if (p.run) r.push_back("-run");
|
||
r.insert(r.end(), p.files.begin(), p.files.end());
|
||
r.insert(r.end(), p.runArgs.begin(), p.runArgs.end());
|
||
}
|
||
|
||
/**
|
||
* Returns the OS-dependent length limit for the command line when invoking
|
||
* subprocesses.
|
||
*/
|
||
size_t maxCommandLineLen()
|
||
{
|
||
#if defined(HAVE_SC_ARG_MAX)
|
||
// http://www.in-ulm.de/~mascheck/various/argmax – the factor 2 is just
|
||
// a wild guess to account for the enviroment.
|
||
return sysconf(_SC_ARG_MAX) / 2;
|
||
#elif defined(_WIN32)
|
||
// http://blogs.msdn.com/b/oldnewthing/archive/2003/12/10/56028.aspx
|
||
return 32767;
|
||
#else
|
||
# error "Do not know how to determine maximum command line length."
|
||
#endif
|
||
}
|
||
|
||
/**
|
||
* Tries to locate an executable with the given name, or an invalid path if
|
||
* nothing was found. Search paths: 1. Directory where this binary resides.
|
||
* 2. System PATH.
|
||
*/
|
||
ls::Path locateBinary(std::string exeName, const char* argv0)
|
||
{
|
||
ls::Path path = llvm::PrependMainExecutablePath(exeName,
|
||
argv0, (void*)&locateBinary);
|
||
if (path.canExecute()) return path;
|
||
|
||
path = ls::Program::FindProgramByName(exeName);
|
||
if (path.canExecute()) return path;
|
||
|
||
return ls::Path();
|
||
}
|
||
|
||
static size_t addStrlen(size_t acc, const char* str)
|
||
{
|
||
if (!str) return acc;
|
||
return acc + strlen(str);
|
||
}
|
||
|
||
int main(int argc, char *argv[])
|
||
{
|
||
ls::Path ldcPath = locateBinary(LDC_EXE_NAME, argv[0]);
|
||
if (!ldcPath.isValid())
|
||
{
|
||
error("Could not locate "LDC_EXE_NAME" executable.");
|
||
}
|
||
|
||
// We need to manually set up argv[0] and the terminating NULL.
|
||
std::vector<const char*> args;
|
||
args.push_back(ldcPath.c_str());
|
||
|
||
Params p = parseArgs(argc, argv, ldcPath);
|
||
buildCommandLine(args, p);
|
||
if (p.vdmd)
|
||
{
|
||
printf(" -- Invoking:");
|
||
for (size_t i = 0; i < args.size(); ++i)
|
||
printf(" %s", args[i]);
|
||
puts("");
|
||
}
|
||
|
||
args.push_back(NULL);
|
||
|
||
// Check if we need to write out a response file.
|
||
size_t totalLen = std::accumulate(args.begin(), args.end(), 0, addStrlen);
|
||
if (totalLen > maxCommandLineLen())
|
||
{
|
||
int rspFd;
|
||
llvm::SmallString<128> rspPath;
|
||
if (ls::fs::unique_file("ldmd-%%-%%-%%-%%.rsp", rspFd, rspPath) !=
|
||
llvm::errc::success)
|
||
{
|
||
error("Could not open temporary response file.");
|
||
}
|
||
|
||
{
|
||
llvm::raw_fd_ostream rspOut(rspFd, /*shouldClose=*/true);
|
||
typedef std::vector<const char*>::const_iterator It;
|
||
for (It it = args.begin(), end = args.end(); it != end; ++it)
|
||
{
|
||
rspOut << *it << '\n';
|
||
}
|
||
}
|
||
|
||
std::string rspArg = "@";
|
||
rspArg += rspPath.str();
|
||
|
||
std::vector<const char*> newArgs;
|
||
newArgs.push_back(argv[0]);
|
||
newArgs.push_back(rspArg.c_str());
|
||
newArgs.push_back(NULL);
|
||
|
||
int rc = execute(ldcPath, &newArgs[0]);
|
||
|
||
bool couldRemove;
|
||
if (ls::fs::remove(rspPath.str(), couldRemove) != llvm::errc::success ||
|
||
!couldRemove)
|
||
{
|
||
warning("Could not remove response file.");
|
||
}
|
||
|
||
return rc;
|
||
}
|
||
else
|
||
{
|
||
return execute(ldcPath, &args[0]);
|
||
}
|
||
}
|