aclocal.m4 16.5 KB
Newer Older
sof's avatar
sof committed
1
dnl $Id: aclocal.m4,v 1.36 1999/01/11 10:15:04 sof Exp $
sof's avatar
sof committed
2 3 4
dnl 
dnl Extra autoconf macros for the Glasgow fptools
dnl
sof's avatar
sof committed
5 6 7
dnl To be a good autoconf citizen, names of local macros have
dnl prefixed with FPTOOLS_ to ensure we don't clash
dnl with any pre-supplied autoconf ones.
sof's avatar
sof committed
8

sof's avatar
sof committed
9 10 11 12
dnl
dnl Has timezone the type time_t or long (HP-UX 10.20 apparently
dnl has `long'..)
dnl 
sof's avatar
sof committed
13 14
AC_DEFUN(FPTOOLS_TYPE_TIMEZONE,
[AC_CACHE_CHECK([type of timezone], fptools_cv_type_timezone,
sof's avatar
sof committed
15 16 17 18 19 20 21 22 23 24 25 26 27
[AC_TRY_COMPILE([#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif

extern time_t timezone;
],
sof's avatar
sof committed
28 29
[int i;], fptools_cv_type_timezone=time_t, fptools_cv_type_timezone=long)])
AC_DEFINE_UNQUOTED(TYPE_TIMEZONE, $fptools_cv_type_timezone)
sof's avatar
sof committed
30 31
])

sof's avatar
sof committed
32 33
dnl *** Is altzone available? ***
dnl 
sof's avatar
sof committed
34 35
AC_DEFUN(FPTOOLS_ALTZONE,
[AC_CACHE_CHECK([altzone], fptools_cv_altzone,
sof's avatar
sof committed
36 37 38 39 40 41 42 43 44 45 46
[AC_TRY_LINK([#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif
], [return altzone;], 
sof's avatar
sof committed
47 48
fptools_cv_altzone=yes, fptools_cv_altzone=no)])
if test "$fptools_cv_altzone" = yes; then
sof's avatar
sof committed
49 50 51 52
  AC_DEFINE(HAVE_ALTZONE)
fi
])

sof's avatar
sof committed
53

sof's avatar
sof committed
54
dnl ** check for leading underscores in symbol names
sof's avatar
sof committed
55 56 57 58 59 60
dnl 
dnl Test for determining whether symbol names have a leading
dnl underscore.
dnl 
dnl We assume that they _haven't_ if anything goes wrong.
dnl
61 62 63 64 65
dnl Some nlist implementations seem to try to be compatible by ignoring
dnl a leading underscore sometimes (eg. FreeBSD).  We therefore have
dnl to work around this by checking for *no* leading underscore first.
dnl Sigh.  --SDM
dnl
sof's avatar
sof committed
66
AC_DEFUN(FPTOOLS_UNDERSCORE,
sof's avatar
sof committed
67
[AC_CHECK_LIB(elf, nlist, LIBS="-lelf $LIBS")dnl
sof's avatar
sof committed
68
AC_CACHE_CHECK([leading underscore in symbol names], fptools_cv_lead_uscore,
sof's avatar
sof committed
69 70 71

dnl
dnl Hack!: nlist() under Digital UNIX insist on there being an _,
sof's avatar
sof committed
72
dnl but symbol table listings shows none. What is going on here?!?
sof's avatar
sof committed
73
dnl
sof's avatar
sof committed
74 75
dnl Another hack: cygwin doesn't come with nlist.h , so we hardwire
dnl the underscoredness of that "platform"
76 77 78
changequote(<<, >>)dnl
<<
case $HostPlatform in
sof's avatar
sof committed
79
alpha-dec-osf*) fptools_cv_lead_uscore='no';;
sof's avatar
sof committed
80
*cygwin32)      fptools_cv_lead_uscore='yes';;
81 82
*) >>
changequote([, ])dnl
sof's avatar
sof committed
83 84 85 86
AC_TRY_RUN([#ifdef HAVE_NLIST_H
#include <nlist.h>
changequote(<<, >>)dnl
<<
87 88
struct nlist xYzzY1[] = {{"xYzzY1", 0},{0}};
struct nlist xYzzY2[] = {{"_xYzzY2", 0},{0}};
sof's avatar
sof committed
89 90 91 92 93 94 95
#endif

main(argc, argv)
int argc;
char **argv;
{
#ifdef HAVE_NLIST_H
96 97 98
    if(nlist(argv[0], xYzzY1) == 0 && xYzzY1[0].n_value != 0)
        exit(1);
    if(nlist(argv[0], xYzzY2) == 0 && xYzzY2[0].n_value != 0)
sof's avatar
sof committed
99 100 101 102
        exit(0);>>
changequote([, ])dnl
#endif
    exit(1);
103
}], fptools_cv_lead_uscore=yes, fptools_cv_lead_uscore=no, fptools_cv_lead_uscore=NO)
104 105
;;
esac);
sof's avatar
sof committed
106
LeadingUnderscore=`echo $fptools_cv_lead_uscore | sed 'y/yesno/YESNO/'`
sof's avatar
sof committed
107
AC_SUBST(LeadingUnderscore)
108 109 110
case $LeadingUnderscore in
YES) AC_DEFINE(LEADING_UNDERSCORE);;
esac
sof's avatar
sof committed
111 112
])

sof's avatar
sof committed
113 114 115
dnl
dnl Check for Happy and version.
dnl
sof's avatar
sof committed
116
AC_DEFUN(FPTOOLS_HAPPY,
sof's avatar
sof committed
117
[AC_PATH_PROG(HappyCmd,happy)
sof's avatar
sof committed
118
AC_CACHE_CHECK([for version of happy], fptools_cv_happy_version,
sof's avatar
sof committed
119
[if test x"$HappyCmd" != x; then
sof's avatar
sof committed
120
   fptools_cv_happy_version="`$HappyCmd -v |
sof's avatar
sof committed
121 122 123
changequote(, )dnl
			  grep 'Happy Version' | sed -e 's/Happy Version \([^ ]*\).*/\1/g'`" ;
changequote([, ])dnl
sof's avatar
sof committed
124
else
sof's avatar
sof committed
125
   fptools_cv_happy_version="";
sof's avatar
sof committed
126
fi;
sof's avatar
sof committed
127
if expr "$fptools_cv_happy_version" "<" 1.4 > /dev/null 2>&1; then
128 129 130 131
   echo
   echo "Happy version 1.4 or later is required to compile GHC."
   exit 1;
fi;
sof's avatar
sof committed
132 133 134 135 136
])
HappyVersion=$ac_cv_happy_version;
AC_SUBST(HappyVersion)
])

sof's avatar
sof committed
137 138 139 140 141
dnl
dnl What's the best way of doing context diffs?
dnl
dnl (NB: NeXTStep thinks diff'ing a file against itself is "trouble")
dnl
sof's avatar
sof committed
142 143
AC_DEFUN(FPTOOLS_PROG_DIFF,
[AC_CACHE_CHECK([for ok way to do context diffs], fptools_cv_context_diffs,
sof's avatar
sof committed
144 145 146
[echo foo > conftest1
echo foo > conftest2
if diff -C 1 conftest1 conftest2 > /dev/null 2>&1 ; then
sof's avatar
sof committed
147
    fptools_cv_context_diffs='diff -C 1'
sof's avatar
sof committed
148 149
else
    if diff -c1 conftest1 conftest2 > /dev/null 2>&1 ; then
sof's avatar
sof committed
150
        fptools_cv_context_diffs='diff -c1'
sof's avatar
sof committed
151 152 153 154 155 156 157
    else
        echo "Can't figure out how to do context diffs."
        echo "Neither \`diff -C 1' nor \`diff -c1' works."
        exit 1
    fi
fi
rm -f conftest1 conftest2
158
])
sof's avatar
sof committed
159
ContextDiffCmd=$fptools_cv_context_diffs
sof's avatar
sof committed
160
AC_SUBST(ContextDiffCmd)
sof's avatar
sof committed
161 162
])

sof's avatar
sof committed
163 164 165
dnl
dnl Finding the Right Yacc
dnl
sof's avatar
sof committed
166
AC_DEFUN(FPTOOLS_PROG_YACCY,
sof's avatar
sof committed
167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195
[AC_PROG_YACC
if test "$YACC" = "yacc"; then
   AC_CACHE_CHECK([if it is an OK yacc], ac_cv_prog_yacc,
   [AC_CHECK_PROG(WhatCmd, what, what, :)
    $WhatCmd $YACC > conftest.out
    if egrep 'y1\.c 1\..*SMI' conftest.out >/dev/null 2>&1; then
        echo "I don't trust your $YaccCmd; it looks like an old Sun yacc"
        if test -f /usr/lang/yacc; then
           echo "I'm going to use /usr/lang/yacc instead"
           ac_cv_prog_yacc=/usr/lang/yacc
        else
           echo "I'm assuming the worst...no parser generator at all"
           ac_cv_prog_yacc=:
        fi
    elif egrep 'y1\.c.*Revision: 4\.2\.6\.3.*DEC' conftest.out >/dev/null 2>&1; then
        echo "I don't trust your $YaccCmd; it looks like a lame DEC yacc"
        echo "I'm assuming the worst...no parser generator at all"
        ac_cv_prog_yacc=:
    else
	ac_cv_prog_yacc=$YACC
    fi
    rm -fr conftest*
])
else
    ac_cv_prog_yacc=$YACC
fi
YaccCmd=$ac_cv_prog_yacc
AC_SUBST(YaccCmd)
])
sof's avatar
sof committed
196

sof's avatar
sof committed
197 198 199 200
dnl *** Checking for ar and its arguments + whether we need ranlib.
dnl
dnl ArCmd and RANLIB are AC_SUBST'ed
dnl 
sof's avatar
sof committed
201
AC_DEFUN(FPTOOLS_PROG_AR_AND_RANLIB,
sof's avatar
sof committed
202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237
[AC_PATH_PROG(ArCmd,ar)
if test -z "$ArCmd"; then
    echo "You don't seem to have ar in your PATH...I have no idea how to make a library"
    exit 1;
fi
if $ArCmd clqs conftest.a >/dev/null 2>/dev/null; then
    ArCmd="$ArCmd clqs"
    NeedRanLib=''
elif $ArCmd cqs conftest.a >/dev/null 2>/dev/null; then
    ArCmd="$ArCmd cqs"
    NeedRanLib=''
elif $ArCmd clq conftest.a >/dev/null 2>/dev/null; then
    ArCmd="$ArCmd clq"
    NeedRanLib='YES'
elif $ArCmd cq conftest.a >/dev/null 2>/dev/null; then
    ArCmd="$ArCmd cq"
    NeedRanLib='YES'
elif $ArCmd cq conftest.a 2>&1 | grep 'no archive members specified' >/dev/null 2>/dev/null; then
    ArCmd="$ArCmd cq"
    NeedRanLib='YES'
else
    echo "I can't figure out how to use your $ArCmd"
    exit 1
fi
rm -rf conftest*
test -n "$ArCmd" && test -n "$verbose" && echo "        setting ArCmd to $ArCmd"
AC_SUBST(ArCmd)
if test -z "$NeedRanLib"; then
    RANLIB=':'
    test -n "$verbose" && echo "        setting RANLIB to $RANLIB"
    AC_SUBST(RANLIB)
else
    AC_PROG_RANLIB
fi
])

sof's avatar
sof committed
238
dnl
sof's avatar
sof committed
239
dnl AC_SHEBANG_PERL - can we she-bang perl?
sof's avatar
sof committed
240
dnl
sof's avatar
sof committed
241 242
AC_DEFUN(FPTOOLS_SHEBANG_PERL,
[AC_CACHE_CHECK([if your perl works in shell scripts], fptools_cv_shebang_perl,
sof's avatar
sof committed
243 244 245 246 247 248
[echo "#!$PerlCmd"'
exit $1;
' > conftest
chmod u+x conftest
(SHELL=/bin/sh; export SHELL; ./conftest 69 > /dev/null)
if test $? -ne 69; then
sof's avatar
sof committed
249
   fptools_cv_shebang_perl=yes
sof's avatar
sof committed
250
else
sof's avatar
sof committed
251
   fptools_cv_shebang_perl=no
sof's avatar
sof committed
252 253 254 255
fi
rm -f conftest
])])

sof's avatar
sof committed
256 257 258 259
dnl
dnl Extra testing of the result AC_PROG_CC, testing the gcc version no.
dnl *Must* be called after AC_PROG_CC
dnl
sof's avatar
sof committed
260 261
AC_DEFUN(FPTOOLS_HAVE_GCC,
[AC_CACHE_CHECK([whether you have an ok gcc], fptools_cv_have_gcc,
sof's avatar
sof committed
262 263 264 265
[if test -z "$GCC"; then
    echo ''
    echo "You would be better off with gcc"
    echo "Perhaps it is already installed, but not in your PATH?"
sof's avatar
sof committed
266
    fptools_cv_have_gcc='no'
sof's avatar
sof committed
267 268
else
changequote(, )dnl
sof's avatar
sof committed
269
    cmd_string="`$CC -v 2>&1 | grep 'version ' | sed -e 's/.*version [^0-9]*\([0-9][0-9]*\)\.\([0-9][0-9]*\).*/expr 20 \\\< \1 \\\* 10 + \2/g' `"
sof's avatar
sof committed
270 271 272 273 274 275
changequote([, ])dnl
    if test `eval $cmd_string 2>/dev/null` != "1"; then
	echo ''
        echo "I'm not sure if your version of gcc will work,"
        echo "but it's worth a shot, eh?"
    fi
sof's avatar
sof committed
276
    fptools_cv_have_gcc='yes'
sof's avatar
sof committed
277 278
fi
])
sof's avatar
sof committed
279
HaveGcc=`echo $fptools_cv_have_gcc | sed 'y/yesno/YESNO/'`
sof's avatar
sof committed
280 281 282
AC_SUBST(HaveGcc)
])

sof's avatar
sof committed
283
dnl
sof's avatar
sof committed
284
dnl FPTOOLS_PROG_GNUCPP gathers the path to the cpp that the
sof's avatar
sof committed
285 286 287 288
dnl gcc driver calls upon.
dnl
dnl Substitutes: GNUCPP and RAWCPP (latter is 'GNUCPP -traditional')
dnl
sof's avatar
sof committed
289 290
AC_DEFUN(FPTOOLS_PROG_GNUCPP,
[AC_CACHE_CHECK([how to invoke GNU cpp directly], fptools_cv_gnu_cpp,
291 292 293
[if test "$HaveGcc" = "YES"; then
	echo > conftest.c
	gcc -v -E conftest.c >/dev/null 2>conftest.out
sof's avatar
sof committed
294
	# \x5c = backslash
sof's avatar
sof committed
295
	echo 'tr/\x5c/\//; /(\S+\/)cpp/ && print "[$]{1}cpp -iprefix [$]1";' > conftest.pl
sof's avatar
sof committed
296
	fptools_cv_gnu_cpp="`eval $PerlCmd -n conftest.pl conftest.out`"
297 298 299 300 301 302 303
	rm -fr conftest*
 else
	# We need to be able to invoke CPP directly, preferably
	# with input from stdin (mkdependHS and hscpp depend on
	# this at the moment).
	# Take a guess at what to use, this probably won't work.
	echo Warning: GNU cpp not found, using $CPP
sof's avatar
sof committed
304
	fptools_cv_gnu_cpp = $CPP
305
 fi
sof's avatar
sof committed
306
])
sof's avatar
sof committed
307
GNUCPP=$fptools_cv_gnu_cpp
308
RAWCPP="$GNUCPP -traditional"
sof's avatar
sof committed
309 310 311 312
AC_SUBST(GNUCPP)
AC_SUBST(RAWCPP)
])

sof's avatar
sof committed
313 314 315
dnl Small feature test for perl version. Assumes PerlCmd
dnl contains path to perl binary
dnl
sof's avatar
sof committed
316
AC_DEFUN(FPTOOLS_CHECK_PERL_VERSION,
sof's avatar
sof committed
317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341
[$PerlCmd -v >conftest.out 2>&1
if grep "version 4" conftest.out >/dev/null 2>&1; then
   if grep "Patch level: 35" conftest.out >/dev/null 2>&1; then
      echo "
************************************************************************
Uh-oh...looks like you have Perl 4.035.

Perl version 4.035 has a bug to do with recursion that will bite if
you run the lit2texi script, when making Info files from
literate files of various sorts.  Either use perl5, the last version of perl4 
(4.036), or an older version (e.g., perl 4.019). Failing that, don't create
any Info files :-)
************************************************************************
"
   fi
else
   if grep "version 5" conftest.out >/dev/null 2>&1; then
      :
   else
     echo "I'm not sure if your version of perl will work,"
     echo "but it's worth a shot, eh?"
   fi
fi
rm -fr conftest*
])
reid's avatar
reid committed
342

sof's avatar
sof committed
343
dnl ** figure out the alignment restriction of a type
reid's avatar
reid committed
344 345 346
dnl    (required SIZEOF test but AC_CHECK_SIZEOF doesn't call PROVIDE
dnl     so we can't call REQUIRE)

sof's avatar
sof committed
347 348
dnl FPTOOLS_CHECK_ALIGNMENT(TYPE)
AC_DEFUN(FPTOOLS_CHECK_ALIGNMENT,
reid's avatar
reid committed
349 350 351 352 353 354 355 356 357 358 359
[changequote(<<, >>)dnl
dnl The name to #define.
define(<<AC_TYPE_NAME>>, translit(alignment_$1, [a-z *], [A-Z_P]))dnl
dnl The cache variable name.
define(<<AC_CV_NAME>>, translit(ac_cv_alignment_$1, [ *], [_p]))dnl
dnl The name of the corresponding size.
define(<<AC_CV_SIZEOF_NAME>>, translit(ac_cv_sizeof_$1, [ *], [_p]))dnl
changequote([, ])dnl
AC_MSG_CHECKING(alignment of $1)
AC_CACHE_VAL(AC_CV_NAME,
[AC_TRY_RUN([
sof's avatar
sof committed
360 361 362 363 364 365 366 367
#include <stdio.h>
#if HAVE_STDDEF_H
#include <stddef.h>
#endif
#ifndef offsetof
#define offsetof(ty,field) ((size_t)((char *)&((ty *)0)->field - (char *)(ty *)0))
#endif
int
reid's avatar
reid committed
368 369
main()
{
sof's avatar
sof committed
370 371 372 373 374 375
  FILE *f=fopen("conftestval", "w");
  if (!f) exit(1);
  fprintf(f, "%d\n", offsetof(struct { char c; $1 ty;},ty));
  exit(0);
}],
AC_CV_NAME=`cat conftestval`,
reid's avatar
reid committed
376 377 378 379 380 381 382 383 384 385
AC_CV_NAME=$AC_CV_SIZEOF_NAME,
AC_CV_NAME=$AC_CV_SIZEOF_NAME)])
AC_MSG_RESULT($AC_CV_NAME)
AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME)
AC_PROVIDE($AC_TYPE_NAME)
undefine([AC_TYPE_NAME])dnl
undefine([AC_CV_NAME])dnl
undefine([AC_CV_SIZEOF_NAME])dnl
])

sof's avatar
sof committed
386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410
dnl ** figure out whether C compiler supports 'long long's
dnl    (Closely based on Andreas Zeller's macro for testing
dnl     for this under C++)
dnl
dnl    If the C compiler supports `long long' types,
dnl    define `HAVE_LONG_LONG'.
dnl
AC_DEFUN(FPTOOLS_C_LONG_LONG,
[
AC_REQUIRE([AC_PROG_CC])
AC_MSG_CHECKING(whether ${CC} supports long long types)
AC_CACHE_VAL(fptools_cv_have_long_long,
[
AC_LANG_SAVE
AC_LANG_C
AC_TRY_COMPILE(,[long long a;],
fptools_cv_have_long_long=yes,
fptools_cv_have_long_long=no)
AC_LANG_RESTORE
])
AC_MSG_RESULT($fptools_cv_have_long_long)
if test "$fptools_cv_have_long_long" = yes; then
AC_DEFINE(HAVE_LONG_LONG)
fi
])
sof's avatar
sof committed
411 412 413 414 415 416 417 418 419 420 421

dnl *** Can we open files in binary mode? ***
dnl 
AC_DEFUN(FPTOOLS_O_BINARY,
[
AC_REQUIRE([AC_PROG_CC])
AC_MSG_CHECKING(whether we can open files in binary mode)
AC_CACHE_VAL(fptools_cv_have_o_binary,
[
AC_LANG_SAVE
AC_LANG_C
sof's avatar
sof committed
422 423 424 425 426
AC_TRY_COMPILE(,
[#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
int x = O_BINARY;],
sof's avatar
sof committed
427 428 429 430 431 432 433 434 435
fptools_cv_have_o_binary=yes,
fptools_cv_have_o_binary=no)
AC_LANG_RESTORE
])
AC_MSG_RESULT($fptools_cv_have_o_binary)
if test "$fptools_cv_have_o_binary" = yes; then
AC_DEFINE(HAVE_O_BINARY)
fi
])
sof's avatar
sof committed
436

sof's avatar
sof committed
437 438 439 440 441 442 443 444 445 446
dnl *** Which one comes first, .text or .data? ***
dnl 
AC_DEFUN(FPTOOLS_CODE_BEFORE_DATA,
[AC_CACHE_CHECK([if code section appears before data], fptools_cv_code_bef_data,
[AC_TRY_RUN([
int f() { return 1; }
int i;
int main() { return ((char*)&f > (char*)&i); }

],
sof's avatar
sof committed
447
fptools_cv_code_bef_data=yes, fptools_cv_code_bef_data=no,false)])
sof's avatar
sof committed
448 449 450 451 452 453 454 455 456 457 458 459
if test "$fptools_cv_code_bef_data" = yes; then
  AC_DEFINE(CODE_BEFORE_DATA)
fi
])

dnl *** Helper function **
dnl 
AC_DEFUN(FPTOOLS_IN_SCOPE,AC_TRY_LINK([extern char* $1;],[return (int)&$2], $3=yes, $3=no))

dnl *** What's the end-of-text-section marker called? ***
dnl
AC_DEFUN(FPTOOLS_END_TEXT_SECTION,
sof's avatar
sof committed
460
[AC_MSG_CHECKING([for end of text section marker])
sof's avatar
sof committed
461 462
not_done=1
for i in etext _etext __etext; do
sof's avatar
sof committed
463 464 465 466
  FPTOOLS_IN_SCOPE($i,$i,fptools_end_of_text)
  if test "$fptools_end_of_text" = yes; then
   AC_CACHE_VAL([fptools_cv_end_of_text_decl], AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER_DECL, $i))
   AC_CACHE_VAL([fptools_cv_end_of_text], AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER, $i))
sof's avatar
sof committed
467 468 469 470
   not_done=0
   break
  fi
done
471
if test "$not_done" = 1; then
sof's avatar
sof committed
472 473 474 475
FPTOOLS_IN_SCOPE(etext asm("etext"),etext,fptools_end_of_text);
if test "$fptools_end_of_text" = yes; then
  AC_CACHE_VAL([fptools_cv_end_of_text], AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER, etext))
  AC_CACHE_VAL([fptools_cv_end_of_text_decl], AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER_DECL, etext asm("etext")))
sof's avatar
sof committed
476
else
sof's avatar
sof committed
477 478
  AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER_DECL, dunno_what_it_is)
  AC_DEFINE_UNQUOTED(TEXT_SECTION_END_MARKER, dunno_what_it_is)
sof's avatar
sof committed
479 480
fi
fi
sof's avatar
sof committed
481 482
AC_MSG_RESULT([$]fptools_cv_end_of_text)
])
sof's avatar
sof committed
483 484 485 486

dnl *** What's the end-of-data-section marker called? ***
dnl
AC_DEFUN(FPTOOLS_END_DATA_SECTION,
sof's avatar
sof committed
487
[AC_MSG_CHECKING([for end of data section marker])
sof's avatar
sof committed
488 489
not_done=1
for i in end _end __end; do
sof's avatar
sof committed
490 491 492 493
  FPTOOLS_IN_SCOPE($i,$i,fptools_end_of_data)
  if test "$fptools_end_of_data" = yes; then
   AC_CACHE_VAL([fptools_cv_end_of_data_decl], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER_DECL, $i)])
   AC_CACHE_VAL([fptools_cv_end_of_data], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER, $i)])
sof's avatar
sof committed
494 495 496 497
   not_done=0
   break
  fi
done
498
if test "$not_done" = 1; then
sof's avatar
sof committed
499 500 501 502
FPTOOLS_IN_SCOPE(end asm("end"),end,fptools_end_of_data);
if test "$fptools_end_of_data" = yes; then
  AC_CACHE_VAL([fptools_cv_end_of_data_decl], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER_DECL, end asm("end"))])
  AC_CACHE_VAL([fptools_cv_end_of_data], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER, end)])
sof's avatar
sof committed
503
else
sof's avatar
sof committed
504 505
  AC_CACHE_VAL([fptools_cv_end_of_data_decl], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER_DECL, dunno_what_it_is)])
  AC_CACHE_VAL([fptools_cv_end_of_data], [AC_DEFINE_UNQUOTED(DATA_SECTION_END_MARKER, dunno_what_it_is)])
sof's avatar
sof committed
506 507
fi
fi
sof's avatar
sof committed
508 509
AC_MSG_RESULT([$]fptools_cv_end_of_data)
])
reid's avatar
reid committed
510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605



dnl Based on AC_TRY_LINK - run iftrue if links cleanly with no warning

dnl FPTOOLS_TRY_LINK_NOWARN(flags,main?,iftrue,iffalse)

AC_DEFUN(FPTOOLS_TRY_LINK_NOWARN,
[
ac_save_LIBS="$LIBS"
LIBS=[$1];
cat > conftest.$ac_ext <<EOF
dnl This sometimes fails to find confdefs.h, for some reason.
dnl [#]line __oline__ "[$]0"
[#]line __oline__ "configure"
#include "confdefs.h"
[$2]
int t() { return 0; }
EOF
if AC_TRY_EVAL(ac_link); then
  ifelse([$3], , :, [
    LIBS="$ac_save_LIBS"
    rm -rf conftest*
    $3])
  ifelse([$4], , , [else
    LIBS="$ac_save_LIBS"
    rm -rf conftest*
    $4
])dnl
fi
rm -f conftest*
]
)

dnl Loosely based on AC_CHECK_LIB in acgeneral.m4 in autoconf distribution

dnl FPTOOLS_CHECK_FLAG_NOWARN(NAME, FLAG, CODE, iftrue, iffalse)

AC_DEFUN(FPTOOLS_CHECK_FLAG_NOWARN,
[AC_MSG_CHECKING([for $1])
 AC_CACHE_VAL(ac_cv_flag_$1,
   [FPTOOLS_TRY_LINK_NOWARN("$2", [main() { $3; exit(0); } ],
     eval "ac_cv_flag_$1=yes",
     eval "ac_cv_flag_$1=no"
   )]
 )
if eval "test \"`echo '$ac_cv_flag_'$1`\" = yes"; then
  AC_MSG_RESULT(yes)
  LIBS="$2 $LIBS"
  $4
else
  AC_MSG_RESULT(no)
  $5
fi
])

dnl FPTOOLS_CHECK_LIB_NOWARN(LIBRARY, FUNCTION)

AC_DEFUN(FPTOOLS_CHECK_LIB_NOWARN,
[FPTOOLS_CHECK_FLAG_NOWARN([function_$2],[],[extern char $2(); $2();],
[changequote(, )dnl
  ac_tr_lib=HAVE_LIB`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 changequote([, ])dnl
 AC_DEFINE_UNQUOTED($ac_tr_lib)
],
[FPTOOLS_CHECK_FLAG_NOWARN([library_$1],[-l$1],[extern char $2(); $2();],
[changequote(, )dnl
  ac_tr_lib=HAVE_LIB`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 changequote([, ])dnl
 AC_DEFINE_UNQUOTED($ac_tr_lib)
],
[]
)])]
)

dnl check for prototypes
dnl
AC_DEFUN(AC_C_PROTOTYPES,
[AC_CACHE_CHECK([prototypes], ac_cv_prototypes,
[AC_TRY_COMPILE([
void foo(int);
void foo(i)
int i; { 
return;
}
],
[int i;], 
ac_cv_prototypes=yes,
ac_cv_prototypes=no)])
if test "$ac_cv_prototypes" = yes; then
AC_DEFINE(HAVE_PROTOTYPES)
fi
])


# LocalWords:  fi