[gcc.git] / gcc / cp / g++spec.c

/* Specific flags and argument handling of the C++ front-end.
   Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.

This file is part of GNU CC.

GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#include "config.h"
#include "system.h"
#include "gcc.h"

/* This bit is set if we saw a `-xfoo' language specification.  */
#define LANGSPEC	(1<<1)
/* This bit is set if they did `-lm' or `-lmath'.  */
#define MATHLIB		(1<<2)
/* This bit is set if they did `-lc'.  */
#define WITHLIBC	(1<<3)

#ifndef MATH_LIBRARY
#define MATH_LIBRARY "-lm"
#endif

#ifndef LIBSTDCXX
#define LIBSTDCXX "-lstdc++"
#endif

void
lang_specific_driver (in_argc, in_argv, in_added_libraries)
     int *in_argc;
     char ***in_argv;
     int *in_added_libraries;
{
  int i, j;

  /* If non-zero, the user gave us the `-v' flag.  */ 
  int saw_verbose_flag = 0;

  /* This will be 0 if we encounter a situation where we should not
     link in libstdc++.  */
  int library = 1;

  /* The number of arguments being added to what's in argv, other than
     libraries.  We use this to track the number of times we've inserted
     -xc++/-xnone.  */
  int added = 2;

  /* Used to track options that take arguments, so we don't go wrapping
     those with -xc++/-xnone.  */
  const char *quote = NULL;

  /* The new argument list will be contained in this.  */
  char **real_arglist;
  const char **arglist;

  /* Non-zero if we saw a `-xfoo' language specification on the
     command line.  Used to avoid adding our own -xc++ if the user
     already gave a language for the file.  */
  int saw_speclang = 0;

  /* "-lm" or "-lmath" if it appears on the command line.  */
  const char *saw_math = 0;

  /* "-lc" if it appears on the command line.  */
  const char *saw_libc = 0;

  /* An array used to flag each argument that needs a bit set for
     LANGSPEC, MATHLIB, or WITHLIBC.  */
  int *args;

  /* By default, we throw on the math library if we have one.  */
  int need_math = (MATH_LIBRARY[0] != '\0');

  /* The total number of arguments with the new stuff.  */
  int argc;

  /* The argument list.  */
  char **argv;

  /* The number of libraries added in.  */
  int added_libraries;

  /* The total number of arguments with the new stuff.  */
  int num_args = 1;

#if ENABLE_NEW_GXX_ABI
  added++;
#endif

  argc = *in_argc;
  argv = *in_argv;
  added_libraries = *in_added_libraries;

  args = (int *) xcalloc (argc, sizeof (int));

  for (i = 1; i < argc; i++)
    {
      /* If the previous option took an argument, we swallow it here.  */
      if (quote)
	{
	  quote = NULL;
	  continue;
	}

      /* We don't do this anymore, since we don't get them with minus
	 signs on them.  */
      if (argv[i][0] == '\0' || argv[i][1] == '\0')
	continue;

      if (argv[i][0] == '-')
	{
	  if (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
			       || strcmp (argv[i], "-nodefaultlibs") == 0))
	    {
	      library = 0;
	    }
	  else if (strcmp (argv[i], "-lm") == 0
		   || strcmp (argv[i], "-lmath") == 0
		   || strcmp (argv[i], MATH_LIBRARY) == 0
#ifdef ALT_LIBM
		   || strcmp (argv[i], ALT_LIBM) == 0
#endif
		  )
	    {
	      args[i] |= MATHLIB;
	      need_math = 0;
	    }
	  else if (strcmp (argv[i], "-lc") == 0)
	    args[i] |= WITHLIBC;
	  else if (strcmp (argv[i], "-v") == 0)
	    {
	      saw_verbose_flag = 1;
	      if (argc == 2)
		{
		  /* If they only gave us `-v', don't try to link
		     in libg++.  */ 
		  library = 0;
		}
	    }
	  else if (strncmp (argv[i], "-x", 2) == 0)
	    saw_speclang = 1;
	  else if (((argv[i][2] == '\0'
		     && (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
		    || strcmp (argv[i], "-Tdata") == 0))
	    quote = argv[i];
	  else if (library != 0 && ((argv[i][2] == '\0'
		     && (char *) strchr ("cSEM", argv[i][1]) != NULL)
		    || strcmp (argv[i], "-MM") == 0))
	    {
	      /* Don't specify libraries if we won't link, since that would
		 cause a warning.  */
	      library = 0;
	      added -= 2;
	    }
	  else
	    /* Pass other options through.  */
	    continue;
	}
      else
	{
	  int len; 

	  if (saw_speclang)
	    {
	      saw_speclang = 0;
	      continue;
	    }

	  /* If the filename ends in .c or .i, put options around it.
	     But not if a specified -x option is currently active.  */
	  len = strlen (argv[i]);
	  if (len > 2
	      && (argv[i][len - 1] == 'c' || argv[i][len - 1] == 'i')
	      && argv[i][len - 2] == '.')
	    {
	      args[i] |= LANGSPEC;
	      added += 2;
	    }
	}
    }

  if (quote)
    fatal ("argument to `%s' missing\n", quote);

  /* If we know we don't have to do anything, bail now.  */
  if (! added && ! library)
    {
      free (args);
      return;
    }

  /* Make sure to have room for the trailing NULL argument.  */
  num_args = argc + added + need_math + 1;
  real_arglist = (char **) xmalloc (num_args * sizeof (char *));
  arglist = (const char **) real_arglist;

  /* NOTE: We start at 1 now, not 0.  */
  for (i = 0, j = 0; i < argc; i++, j++)
    {
      arglist[j] = argv[i];

      /* Make sure -lstdc++ is before the math library, since libstdc++
	 itself uses those math routines.  */
      if (!saw_math && (args[i] & MATHLIB) && library)
	{
	  --j;
	  saw_math = argv[i];
	}

      if (!saw_libc && (args[i] & WITHLIBC) && library)
	{
	  --j;
	  saw_libc = argv[i];
	}

      /* Wrap foo.c and foo.i files in a language specification to
	 force the gcc compiler driver to run cc1plus on them.  */
      if (args[i] & LANGSPEC)
	{
	  int len = strlen (argv[i]);
	  if (argv[i][len - 1] == 'i')
	    arglist[j++] = "-xc++-cpp-output";
	  else
	    arglist[j++] = "-xc++";
	  arglist[j++] = argv[i];
	  arglist[j] = "-xnone";
	}
  }

#if ENABLE_NEW_GXX_ABI
  arglist[j++] = "-fnew-abi";
#endif

  /* Add `-lstdc++' if we haven't already done so.  */
  if (library)
    {
      arglist[j++] = LIBSTDCXX;
      added_libraries++;
    }
  if (saw_math)
    arglist[j++] = saw_math;
  else if (library && need_math)
    {
      arglist[j++] = MATH_LIBRARY;
      added_libraries++;
    }
  if (saw_libc)
    arglist[j++] = saw_libc;

  arglist[j] = NULL;

  *in_argc = j;
  *in_argv = real_arglist;
  *in_added_libraries = added_libraries;
}

/* Called before linking.  Returns 0 on success and -1 on failure. */
int lang_specific_pre_link ()  /* Not used for C++. */
{
  return 0;
}

/* Number of extra output files that lang_specific_pre_link may generate. */
int lang_specific_extra_outfiles = 0;  /* Not used for C++. */
Commit	Line	Data
5b76d03b	1	/* Specific flags and argument handling of the C++ front-end.
eeb109f2	2	Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
5b76d03b BK	3
	4	This file is part of GNU CC.
	5
	6	GNU CC is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2, or (at your option)
	9	any later version.
	10
	11	GNU CC is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GNU CC; see the file COPYING. If not, write to
	18	the Free Software Foundation, 59 Temple Place - Suite 330,
	19	Boston, MA 02111-1307, USA. */
	20
da20811c	21	#include "config.h"
8d052bc7	22	#include "system.h"
9257393c	23	#include "gcc.h"
2ba25f50	24
f442f723 MS	25	/* This bit is set if we saw a `-xfoo' language specification. */
	26	#define LANGSPEC (1<<1)
	27	/* This bit is set if they did `-lm' or `-lmath'. */
	28	#define MATHLIB (1<<2)
	29	/* This bit is set if they did `-lc'. */
	30	#define WITHLIBC (1<<3)
	31
	32	#ifndef MATH_LIBRARY
	33	#define MATH_LIBRARY "-lm"
	34	#endif
	35
18cd4ded ME	36	#ifndef LIBSTDCXX
	37	#define LIBSTDCXX "-lstdc++"
	38	#endif
	39
f442f723	40	void
9257393c	41	lang_specific_driver (in_argc, in_argv, in_added_libraries)
f442f723 MS	42	int *in_argc;
f442f723 MS	43	char ***in_argv;
84914634	44	int *in_added_libraries;
f442f723 MS	45	{
	46	int i, j;
	47
	48	/* If non-zero, the user gave us the `-v' flag. */
	49	int saw_verbose_flag = 0;
	50
	51	/* This will be 0 if we encounter a situation where we should not
	52	link in libstdc++. */
	53	int library = 1;
	54
	55	/* The number of arguments being added to what's in argv, other than
	56	libraries. We use this to track the number of times we've inserted
	57	-xc++/-xnone. */
	58	int added = 2;
	59
	60	/* Used to track options that take arguments, so we don't go wrapping
	61	those with -xc++/-xnone. */
9257393c	62	const char *quote = NULL;
f442f723 MS	63
f442f723 MS	64	/* The new argument list will be contained in this. */
9257393c KG	65	char **real_arglist;
9257393c KG	66	const char **arglist;
f442f723 MS	67
	68	/* Non-zero if we saw a `-xfoo' language specification on the
	69	command line. Used to avoid adding our own -xc++ if the user
	70	already gave a language for the file. */
	71	int saw_speclang = 0;
	72
	73	/* "-lm" or "-lmath" if it appears on the command line. */
9257393c	74	const char *saw_math = 0;
f442f723 MS	75
f442f723 MS	76	/* "-lc" if it appears on the command line. */
9257393c	77	const char *saw_libc = 0;
f442f723 MS	78
	79	/* An array used to flag each argument that needs a bit set for
	80	LANGSPEC, MATHLIB, or WITHLIBC. */
	81	int *args;
	82
b54ccf71 JM	83	/* By default, we throw on the math library if we have one. */
b54ccf71 JM	84	int need_math = (MATH_LIBRARY[0] != '\0');
f442f723 MS	85
	86	/* The total number of arguments with the new stuff. */
	87	int argc;
	88
	89	/* The argument list. */
	90	char **argv;
	91
84914634 JW	92	/* The number of libraries added in. */
	93	int added_libraries;
	94
f442f723 MS	95	/* The total number of arguments with the new stuff. */
	96	int num_args = 1;
	97
eeb109f2 NS	98	#if ENABLE_NEW_GXX_ABI
	99	added++;
	100	#endif
	101
f442f723 MS	102	argc = *in_argc;
f442f723 MS	103	argv = *in_argv;
84914634	104	added_libraries = *in_added_libraries;
f442f723	105
9257393c	106	args = (int *) xcalloc (argc, sizeof (int));
f442f723	107
1bf2b2d2	108	for (i = 1; i < argc; i++)
f442f723 MS	109	{
	110	/* If the previous option took an argument, we swallow it here. */
	111	if (quote)
	112	{
	113	quote = NULL;
	114	continue;
	115	}
	116
	117	/* We don't do this anymore, since we don't get them with minus
	118	signs on them. */
	119	if (argv[i][0] == '\0' \|\| argv[i][1] == '\0')
	120	continue;
	121
	122	if (argv[i][0] == '-')
	123	{
1bf2b2d2 BK	124	if (library != 0 && (strcmp (argv[i], "-nostdlib") == 0
1bf2b2d2 BK	125	\|\| strcmp (argv[i], "-nodefaultlibs") == 0))
f442f723 MS	126	{
	127	library = 0;
	128	}
1bf2b2d2 BK	129	else if (strcmp (argv[i], "-lm") == 0
1bf2b2d2 BK	130	\|\| strcmp (argv[i], "-lmath") == 0
b54ccf71	131	\|\| strcmp (argv[i], MATH_LIBRARY) == 0
f442f723 MS	132	#ifdef ALT_LIBM
	133	\|\| strcmp (argv[i], ALT_LIBM) == 0
	134	#endif
	135	)
	136	{
	137	args[i] \|= MATHLIB;
	138	need_math = 0;
	139	}
1bf2b2d2	140	else if (strcmp (argv[i], "-lc") == 0)
f442f723	141	args[i] \|= WITHLIBC;
1bf2b2d2	142	else if (strcmp (argv[i], "-v") == 0)
f442f723 MS	143	{
f442f723 MS	144	saw_verbose_flag = 1;
1bf2b2d2	145	if (argc == 2)
f442f723 MS	146	{
	147	/* If they only gave us `-v', don't try to link
	148	in libg++. */
	149	library = 0;
	150	}
	151	}
1bf2b2d2	152	else if (strncmp (argv[i], "-x", 2) == 0)
f442f723 MS	153	saw_speclang = 1;
	154	else if (((argv[i][2] == '\0'
	155	&& (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
1bf2b2d2	156	\|\| strcmp (argv[i], "-Tdata") == 0))
f442f723 MS	157	quote = argv[i];
	158	else if (library != 0 && ((argv[i][2] == '\0'
	159	&& (char *) strchr ("cSEM", argv[i][1]) != NULL)
1bf2b2d2	160	\|\| strcmp (argv[i], "-MM") == 0))
f442f723 MS	161	{
	162	/* Don't specify libraries if we won't link, since that would
	163	cause a warning. */
	164	library = 0;
	165	added -= 2;
	166	}
	167	else
	168	/* Pass other options through. */
	169	continue;
	170	}
	171	else
	172	{
	173	int len;
	174
	175	if (saw_speclang)
	176	{
	177	saw_speclang = 0;
	178	continue;
	179	}
	180
	181	/* If the filename ends in .c or .i, put options around it.
	182	But not if a specified -x option is currently active. */
	183	len = strlen (argv[i]);
	184	if (len > 2
	185	&& (argv[i][len - 1] == 'c' \|\| argv[i][len - 1] == 'i')
	186	&& argv[i][len - 2] == '.')
	187	{
	188	args[i] \|= LANGSPEC;
	189	added += 2;
	190	}
	191	}
	192	}
	193
	194	if (quote)
9257393c	195	fatal ("argument to `%s' missing\n", quote);
f442f723 MS	196
	197	/* If we know we don't have to do anything, bail now. */
	198	if (! added && ! library)
	199	{
	200	free (args);
	201	return;
	202	}
	203
732d9b8c MK	204	/* Make sure to have room for the trailing NULL argument. */
732d9b8c MK	205	num_args = argc + added + need_math + 1;
9257393c KG	206	real_arglist = (char *) xmalloc (num_args sizeof (char *));
9257393c KG	207	arglist = (const char **) real_arglist;
f442f723 MS	208
	209	/* NOTE: We start at 1 now, not 0. */
	210	for (i = 0, j = 0; i < argc; i++, j++)
	211	{
	212	arglist[j] = argv[i];
	213
	214	/* Make sure -lstdc++ is before the math library, since libstdc++
	215	itself uses those math routines. */
	216	if (!saw_math && (args[i] & MATHLIB) && library)
	217	{
	218	--j;
	219	saw_math = argv[i];
	220	}
	221
	222	if (!saw_libc && (args[i] & WITHLIBC) && library)
	223	{
	224	--j;
	225	saw_libc = argv[i];
	226	}
	227
	228	/* Wrap foo.c and foo.i files in a language specification to
	229	force the gcc compiler driver to run cc1plus on them. */
	230	if (args[i] & LANGSPEC)
	231	{
	232	int len = strlen (argv[i]);
	233	if (argv[i][len - 1] == 'i')
	234	arglist[j++] = "-xc++-cpp-output";
	235	else
	236	arglist[j++] = "-xc++";
	237	arglist[j++] = argv[i];
	238	arglist[j] = "-xnone";
	239	}
	240	}
	241
eeb109f2 NS	242	#if ENABLE_NEW_GXX_ABI
	243	arglist[j++] = "-fnew-abi";
	244	#endif
	245
f442f723 MS	246	/* Add `-lstdc++' if we haven't already done so. */
f442f723 MS	247	if (library)
84914634	248	{
18cd4ded	249	arglist[j++] = LIBSTDCXX;
84914634 JW	250	added_libraries++;
84914634 JW	251	}
f442f723 MS	252	if (saw_math)
f442f723 MS	253	arglist[j++] = saw_math;
17294adf	254	else if (library && need_math)
84914634 JW	255	{
	256	arglist[j++] = MATH_LIBRARY;
	257	added_libraries++;
	258	}
f442f723 MS	259	if (saw_libc)
	260	arglist[j++] = saw_libc;
	261
	262	arglist[j] = NULL;
	263
	264	*in_argc = j;
9257393c	265	*in_argv = real_arglist;
84914634	266	*in_added_libraries = added_libraries;
f442f723	267	}
240661ba PB	268
	269	/* Called before linking. Returns 0 on success and -1 on failure. */
	270	int lang_specific_pre_link () /* Not used for C++. */
	271	{
	272	return 0;
	273	}
	274
	275	/* Number of extra output files that lang_specific_pre_link may generate. */
8db79477	276	int lang_specific_extra_outfiles = 0; /* Not used for C++. */