libio/gen-params

   1 #!/bin/sh
   2 # Copyright (C) 1992, 1993, 1994, 1997, 1998, 1999 Free Software Foundation
   3 #
   4 # This file is part of the GNU IO Library.  This library is free
   5 # software; you can redistribute it and/or modify it under the
   6 # terms of the GNU General Public License as published by the
   7 # Free Software Foundation; either version 2, or (at your option)
   8 # any later version.
   9 #
  10 # This library is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this library; see the file COPYING.  If not, write to the Free
  17 # Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 #    Written by Per Bothner (bothner@cygnus.com)
  20
  21 # This is a shell-script that figures out various things about a
  22 # system, and writes (to stdout) a C-style include files with
  23 # suitable definitions, including all the standard Posix types.
  24 # It works by compiling various test programs -- some are run through
  25 # the C pre-processor, and the output examined.
  26 # The test programs are only compiled, not executed, so the script
  27 # should even if you're cross-compiling.
  28 # It uses $CC (which defaults to cc) to compile C programs (extension .c),
  29 # and $CXX (which defaults to gcc) to compile C++ programs (extension .C).
  30 # The shell-script is written for libg++.a.
  31
  32 # Usage: gen-params [NAME1=name1 ...]
  33 # - where an assignment (such as size_t="unsigned int" means to
  34 # use that value, instead of trying to figure it out.
  35
  36 # Uncomment following line for debugging
  37 # set -x
  38
  39 SED=sed
  40
  41 # Evaluate the arguments (which should be assignments):
  42 for arg in "$@"; do
  43   # Quote arg (i.e. FOO=bar => FOO='bar'), then eval it.
  44   eval `echo "$arg" | ${SED} -e "s|^\(.*\)=\(.*\)|\1='\2'|"`
  45 done
  46
  47 macro_prefix=${macro_prefix-"_G_"}
  48 rootdir=`pwd`/..
  49 gccdir=${gccdir-${rootdir}/gcc}
  50 binutilsdir=${binutilsdir-${rootdir}/binutils}
  51 CC=${CC-`if [ -f ${gccdir}/xgcc ] ; \
  52         then echo ${gccdir}/xgcc -B${gccdir}/ ; \
  53         else echo cc ; fi`}
  54 CXX=${CXX-`if [ -f ${gccdir}/xgcc ] ; \
  55         then echo ${gccdir}/xgcc -B${gccdir}/ ; \
  56         else echo gcc ; fi`}
  57 CPP=${CPP-`echo ${CC} -E`}
  58 CONFIG_NM=${CONFIG_NM-`if [ -f ${binutilsdir}/nm.new ] ; \
  59         then echo ${binutilsdir}/nm.new ; \
  60         else echo nm ; fi`}
  61
  62 cat <<!EOF!
  63 /* AUTOMATICALLY GENERATED; DO NOT EDIT! */
  64 #ifndef ${macro_prefix}config_h
  65 #define ${macro_prefix}config_h
  66 !EOF!
  67
  68 if [ x"${LIB_VERSION}" != "x" ] ; then
  69   echo "#define ${macro_prefix}LIB_VERSION" '"'${LIB_VERSION}'"'
  70 fi
  71
  72 # This program is used to test if the compiler prepends '_' before identifiers.
  73 # It is also used to check the g++ uses '$' or '.' various places.
  74
  75 if test -z "${NAMES_HAVE_UNDERSCORE}" \
  76    || test -z "${DOLLAR_IN_LABEL}" \
  77    || test -z "${VTABLE_LABEL_PREFIX}"; then
  78   cat >dummy.h <<!EOF!
  79 #ifdef __GNUG__
  80 #pragma interface
  81 #endif
  82   struct filebuf {
  83       virtual int foo();
  84   };
  85 !EOF!
  86   cat >dummy.C <<!EOF!
  87 #ifdef __GNUG__
  88 #pragma implementation
  89 #endif
  90 #include "dummy.h"
  91   int filebuf::foo() { return 0; }
  92   extern "C" int FUNC(int);
  93   int FUNC(int i) { return i+10; }
  94 !EOF!
  95
  96   if ${CXX} -O -c dummy.C ; then
  97     if test -z "${NAMES_HAVE_UNDERSCORE}" ; then
  98       if test "`${CONFIG_NM} dummy.o | grep _FUNC`" != ""; then
  99         NAMES_HAVE_UNDERSCORE=1
 100       elif test "`${CONFIG_NM} dummy.o | grep FUNC`" != ""; then
 101         NAMES_HAVE_UNDERSCORE=0
 102       else
 103         echo "${CONFIG_NM} failed to find FUNC in dummy.o!" 1>&2; exit -1;
 104       fi
 105     fi
 106     echo "#define ${macro_prefix}NAMES_HAVE_UNDERSCORE ${NAMES_HAVE_UNDERSCORE}"
 107
 108     if test -z "${VTABLE_LABEL_PREFIX}" ; then
 109       # Determine how virtual function tables are named.  This is fragile,
 110       # because different nm's produce output in different formats.
 111       ${CONFIG_NM} dummy.o >TMP
 112       if [ -n "`${SED} -n -e 's/ virtual table/nope/p' <TMP`" ] ; then
 113         ${CONFIG_NM} --no-cplus dummy.o >TMP 2>/dev/null ||
 114           ${CONFIG_NM} --no-demangle dummy.o >TMP 2>/dev/null ||
 115           ${CONFIG_NM} dummy.o >TMP 2>/dev/null
 116       fi
 117       # First we look for a pattern that matches historical output from g++.
 118       # We surround the actual label name by <> to separate it from
 119       # other nm junk.
 120       ${SED} -n -e 's/_*vt[$_.]7*filebuf/<&>/p' <TMP >dummy.out
 121       # For paranoia's sake (e.g. if we're using some other C++ compiler)
 122       # we try a more general pattern, and append the result.
 123       grep -v foo <TMP \
 124         | ${SED} -n -e 's/[a-zA-Z0-9_.$]*filebuf[a-zA-Z0-9_.$]*/<&>/p' \
 125         >>dummy.out
 126       # Now we get rid of the <>, and any other junk on the nm output line.
 127       # (We get rid of <filebuf> in case nm included debugging output for
 128       # class filebuf itself.)  On windows32, we also need to delete the
 129       # unique sections (.data$_vt$*), otherwise we get the wrong result.
 130       # Finally, we select the first line of the result, and hope that's
 131       # what we wanted!
 132       vtab_name=`${SED} -n -e '/<filebuf>/d' \
 133         -e '/\.data[$_.]<_vt\$7filebuf>/d' \
 134         -e 's/^.*<\(.*\)>.*$/\1/p' \
 135         <dummy.out | ${SED} -n -e '1p'`
 136       case "${vtab_name}" in
 137         *7filebuf) echo "#define ${macro_prefix}VTABLE_LABEL_HAS_LENGTH 1" ;;
 138         *) echo "#define ${macro_prefix}VTABLE_LABEL_HAS_LENGTH 0" ;;
 139       esac
 140       VTABLE_LABEL_PREFIX=`echo $vtab_name | ${SED} -e 's/7*filebuf//'`
 141     fi
 142     echo "#define ${macro_prefix}VTABLE_LABEL_PREFIX" '"'"${VTABLE_LABEL_PREFIX}"'"'
 143     if [ "${VTABLE_LABEL_PREFIX}" = "__vt_" -o \
 144         "${VTABLE_LABEL_PREFIX}" = "___vt_" ] ; then
 145       echo "#define ${macro_prefix}USING_THUNKS"
 146     fi
 147
 148     # VTABLE_LABEL_PREFIX_ID is the same as VTABLE_LABEL_PREFIX,
 149     # but the former is a C identifier, while the latter is a quoted
 150     # st
 151     if [ -z ""`echo ${VTABLE_LABEL_PREFIX} | ${SED} -e 's/[a-zA-Z0-9_]//g'` ] ; then
 152       if [ "${NAMES_HAVE_UNDERSCORE}" = "1" ] ; then
 153         VTABLE_LABEL_PREFIX=`echo ${VTABLE_LABEL_PREFIX} | ${SED} -e 's/^_//'`
 154       fi
 155       echo "#define ${macro_prefix}VTABLE_LABEL_PREFIX_ID ${VTABLE_LABEL_PREFIX}"
 156     fi
 157
 158 #    if test -n "${DOLLAR_IN_LABEL}" ; then
 159 #      echo "#define ${macro_prefix}DOLLAR_IN_LABEL ${DOLLAR_IN_LABEL}"
 160 #    elif test "`${CONFIG_NM} dummy.o | grep 'vt[$$]7filebuf'`" != ""; then
 161 #      echo "#define ${macro_prefix}DOLLAR_IN_LABEL 1"
 162 #    elif test "`${CONFIG_NM} dummy.o | grep 'vt[.]7filebuf'`" != ""; then
 163 #      echo "#define ${macro_prefix}DOLLAR_IN_LABEL 0"
 164 #    elif test "`${CONFIG_NM} dummy.o | grep 'vtbl__7filebuf'`" != ""; then
 165 #      echo "#define ${macro_prefix}DOLLAR_IN_LABEL 0"
 166 #    else
 167 #      echo "gen-params: ${CONFIG_NM} failed to find vt[.\$]filebuf in dummy.o!" 1>&2; exit 1
 168 #    fi
 169   else
 170     # The compile failed for some reason (no C++?)
 171     echo "gen-params: could not compile dummy.C with ${CXX}" 1>&2; exit 1;
 172   fi
 173 fi
 174
 175 # A little test program to check if struct stat has st_blksize.
 176 cat >dummy.c <<!EOF!
 177 #include <sys/types.h>
 178 #include <sys/stat.h>
 179 int BLKSIZE(struct stat *st)
 180 {
 181     return st->st_blksize;
 182 }
 183 !EOF!
 184
 185 if ${CC} -c dummy.c >/dev/null 2>&1 ; then
 186   echo "#define ${macro_prefix}HAVE_ST_BLKSIZE 1"
 187 else
 188   echo "#define ${macro_prefix}HAVE_ST_BLKSIZE 0"
 189 fi
 190
 191 # A little test program to check if the name 'clog' is defined in libm,
 192 # as it is under DEC UNIX.
 193 cat >dummy.c <<!EOF!
 194 int clog;
 195 main () {}
 196 !EOF!
 197
 198 if ${CC} dummy.c -lm 2>&1 >/dev/null | grep clog >/dev/null; then
 199   echo "#define ${macro_prefix}CLOG_CONFLICT 1"
 200 fi
 201
 202 echo ""
 203
 204 # Next, generate definitions for the standard types (such as mode_t)
 205 # compatible with those in the standard C header files.
 206 # It works by a dummy program through the C pre-processor, and then
 207 # using sed to search for typedefs in the output.
 208
 209 for hdr in wchar wctype; do
 210   eval $hdr=0
 211   cat >dummy.c <<EOF
 212 #include <${hdr}.h>
 213 EOF
 214   if ${CPP} dummy.c >/dev/null 2>&1 ; then eval $hdr=1; fi
 215 done
 216
 217 cat >dummy.c <<!EOF!
 218 #include <sys/types.h>
 219 #include <stddef.h>
 220 #ifdef __STDC__
 221 #include <stdarg.h>
 222 #else /* !__STDC__ */
 223 #include <varargs.h>
 224 #endif /* __STDC__ */
 225 #include <stdio.h>
 226 #include <time.h>
 227 #include <signal.h>
 228 #ifdef __STDC__
 229 #include <limits.h>
 230 #endif
 231 #if WCHAR == 1
 232 #include <wchar.h>
 233 #endif
 234 #if WCTYPE == 1
 235 #include <wctype.h>
 236 #endif
 237 #ifdef size_t
 238 typedef size_t Xsize_t;
 239 #elif defined(__SIZE_TYPE__)
 240 typedef __SIZE_TYPE__ Xsize_t;
 241 #endif
 242 #ifdef ptrdiff_t
 243 typedef ptrdiff_t Xptrdiff_t;
 244 #elif defined(__PTRDIFF_TYPE__)
 245 typedef __PTRDIFF_TYPE__ Xptrdiff_t;
 246 #endif
 247 #ifdef wchar_t
 248 typedef wchar_t Xwchar_t;
 249 #elif defined(__WCHAR_TYPE__)
 250 typedef __WCHAR_TYPE__ Xwchar_t;
 251 #endif
 252 #ifdef va_list
 253 typedef va_list XXXva_list;
 254 #endif
 255 #ifdef BUFSIZ
 256 long XBUFSIZ=BUFSIZ;
 257 #endif
 258 #ifdef FOPEN_MAX
 259 long XFOPEN_MAX=FOPEN_MAX;
 260 #endif
 261 #ifdef FILENAME_MAX
 262 long XFILENAME_MAX=FILENAME_MAX;
 263 #endif
 264 #ifdef SHRT_MAX
 265 long XSHRT_MAX=SHRT_MAX;
 266 #endif
 267 #ifdef INT_MAX
 268 long XINT_MAX=INT_MAX;
 269 #endif
 270 #ifdef LONG_MAX
 271 long XLONG_MAX=LONG_MAX;
 272 #endif
 273 #ifdef LONG_LONG_MAX
 274 long XLONG_LONG_MAX=LONG_LONG_MAX;
 275 #endif
 276 !EOF!
 277
 278 if ${CPP} dummy.c -DWCHAR=$wchar -DWCTYPE=$wctype >TMP ; then true
 279 else
 280   echo "gen-params: could not invoke ${CPP} on dummy.c" 1>&2 ; exit 1
 281 fi
 282 tr '    ' ' ' <TMP >dummy.out
 283
 284 for TYPE in dev_t clock_t fpos_t gid_t ino_t mode_t nlink_t off_t pid_t ptrdiff_t sigset_t size_t ssize_t time_t uid_t va_list wchar_t wint_t int16_t uint16_t int32_t uint_32_t u_int16_t u_int32_t; do
 285     eval IMPORTED=\$$TYPE
 286     if [ -n "${IMPORTED}" ] ; then
 287         eval "$TYPE='$IMPORTED'"
 288     else
 289         t=$TYPE
 290         VALUE=''
 291
 292         # Follow `typedef VALUE TYPE' chains, but don't loop indefinitely.
 293         for iteration in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20; do
 294             # Search dummy.out for a typedef for X*$t.
 295             sed_script="
 296                 s/unsigned long long int/_G_ullong/g
 297                 s/long long int/_G_llong/g
 298                 s/unsigned long long/_G_ullong/g
 299                 s/long long/_G_llong/g
 300                 /.*typedef  *\\(.*[^ ]\\)  *X*$t *;.*/{s||\1|;p;q;}
 301                 /.*typedef  *\\(.*[^ a-zA-Z0-9_]\\)X*$t *;.*/{s||\1|;p;q;}
 302             "
 303             t=`${SED} -n "$sed_script" <dummy.out`
 304             case "$t" in
 305               '')
 306                 break;;
 307               *)
 308                 # Found a type $t; save it in VALUE.
 309                 VALUE=$t
 310                 # If it won't cause problems in matching,
 311                 # look for a typedef for it in turn.
 312                 case "$VALUE" in
 313                   *.* | */* | *\ * | *\** | *\[* | *\\*) break;;
 314                 esac;;
 315             esac
 316         done
 317
 318         case "$VALUE" in
 319           ?*) eval "$TYPE=\"$VALUE\""
 320         esac
 321     fi
 322 done
 323
 324 # Look for some standard macros.
 325 for NAME in BUFSIZ FOPEN_MAX FILENAME_MAX NULL; do
 326     eval IMPORTED=\$$NAME
 327     if [ -n "${IMPORTED}" ] ; then
 328         eval "$NAME='$IMPORTED /* specified */'"
 329     else
 330         rm -f TMP
 331         ${SED} -n -e 's| *;|;|g' -e "s|long X${NAME}= *\(.*\);|\1|w TMP" \
 332           <dummy.out>/dev/null
 333         # Now select the first definition.
 334         if [ -s TMP ]; then
 335             eval "$NAME='"`${SED} -e '2,$d' <TMP`"'"
 336         fi
 337     fi
 338 done
 339
 340 # These macros must be numerical constants; strip any trailing 'L's.
 341 for NAME in SHRT_MAX INT_MAX LONG_MAX LONG_LONG_MAX; do
 342     eval IMPORTED=\$$NAME
 343     if [ -n "${IMPORTED}" ] ; then
 344         eval "$NAME='$IMPORTED /* specified */'"
 345     else
 346         rm -f TMP
 347         ${SED} -n -e 's| *;|;|g' -e "s|long X${NAME}= *\([0-9]*\)L* *;|\1|w TMP" \
 348           <dummy.out>/dev/null
 349         # Now select the first definition.
 350         if [ -s TMP ]; then
 351             eval "$NAME='"`${SED} -e '2,$d' <TMP`"'"
 352         fi
 353     fi
 354 done
 355
 356 # Figure out integral type sizes.
 357
 358 default_int16='short /* deduction failed */'
 359 default_int32='long /* deduction failed */'
 360 INT16=32767
 361 INT32=2147483647
 362
 363 if [ "${SHRT_MAX}" = $INT16 ] ; then
 364   default_int16='short /* deduced */'
 365   if [ "${LONG_MAX}" = $INT32 ] ; then
 366     default_int32='long /* deduced */'
 367   elif [ "${INT_MAX}" = $INT32 ] ; then
 368     default_int32='int /* deduced */'
 369   fi
 370 fi
 371
 372 [ -n "$u_int16_t" ] && uint16_t="$u_int16_t"
 373 [ -n "$u_int32_t" ] && uint32_t="$u_int32_t"
 374
 375 [ -z  "$int16_t" ] &&  int16_t="$default_int16"
 376 [ -z "$uint16_t" ] && uint16_t="unsigned $int16_t"
 377 [ -z  "$int32_t" ] &&  int32_t="$default_int32"
 378 [ -z "$uint32_t" ] && uint32_t="unsigned $int32_t"
 379
 380 cat <<!EOF!
 381 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
 382 typedef          int   ${macro_prefix}int8_t __attribute__((__mode__(__QI__)));
 383 typedef unsigned int  ${macro_prefix}uint8_t __attribute__((__mode__(__QI__)));
 384 typedef          int  ${macro_prefix}int16_t __attribute__((__mode__(__HI__)));
 385 typedef unsigned int ${macro_prefix}uint16_t __attribute__((__mode__(__HI__)));
 386 typedef          int  ${macro_prefix}int32_t __attribute__((__mode__(__SI__)));
 387 typedef unsigned int ${macro_prefix}uint32_t __attribute__((__mode__(__SI__)));
 388 typedef          int  ${macro_prefix}int64_t __attribute__((__mode__(__DI__)));
 389 typedef unsigned int ${macro_prefix}uint64_t __attribute__((__mode__(__DI__)));
 390 #if __GNUC__ > 2 || __GNUC_MINOR__ >= 8
 391 __extension__ typedef long long ${macro_prefix}llong;
 392 __extension__ typedef unsigned long long ${macro_prefix}ullong;
 393 #endif
 394 #else
 395 typedef  $int16_t  ${macro_prefix}int16_t;
 396 typedef $uint16_t ${macro_prefix}uint16_t;
 397 typedef  $int32_t  ${macro_prefix}int32_t;
 398 typedef $uint32_t ${macro_prefix}uint32_t;
 399 #endif
 400
 401 typedef ${clock_t-int /* default */} ${macro_prefix}clock_t;
 402 typedef ${dev_t-int /* default */} ${macro_prefix}dev_t;
 403 typedef ${fpos_t-long /* default */} ${macro_prefix}fpos_t;
 404 typedef ${gid_t-int /* default */} ${macro_prefix}gid_t;
 405 typedef ${ino_t-int /* default */} ${macro_prefix}ino_t;
 406 typedef ${mode_t-int /* default */} ${macro_prefix}mode_t;
 407 typedef ${nlink_t-int /* default */} ${macro_prefix}nlink_t;
 408 typedef ${off_t-long /* default */} ${macro_prefix}off_t;
 409 typedef ${pid_t-int /* default */} ${macro_prefix}pid_t;
 410 #ifndef __PTRDIFF_TYPE__
 411 #define __PTRDIFF_TYPE__ ${ptrdiff_t-long int /* default */}
 412 #endif
 413 typedef __PTRDIFF_TYPE__ ${macro_prefix}ptrdiff_t;
 414 typedef ${sigset_t-int /* default */} ${macro_prefix}sigset_t;
 415 #ifndef __SIZE_TYPE__
 416 #define __SIZE_TYPE__ ${size_t-unsigned long /* default */}
 417 #endif
 418 typedef __SIZE_TYPE__ ${macro_prefix}size_t;
 419 typedef ${time_t-int /* default */} ${macro_prefix}time_t;
 420 typedef ${uid_t-int /* default */} ${macro_prefix}uid_t;
 421 typedef ${wchar_t-int /* default */} ${macro_prefix}wchar_t;
 422
 423 #define ${macro_prefix}BUFSIZ ${BUFSIZ-1024 /* default */}
 424 #define ${macro_prefix}FOPEN_MAX ${FOPEN_MAX-32 /* default */}
 425 #define ${macro_prefix}FILENAME_MAX ${FILENAME_MAX-1024 /* default */}
 426 #if defined (__cplusplus) || defined (__STDC__)
 427 #define ${macro_prefix}ARGS(ARGLIST) ARGLIST
 428 #else
 429 #define ${macro_prefix}ARGS(ARGLIST) ()
 430 #endif
 431 #if !defined (__GNUG__) || defined (__STRICT_ANSI__)
 432 #define ${macro_prefix}NO_NRV
 433 #endif
 434 #if !defined (__GNUG__)
 435 #define _G_NO_EXTERN_TEMPLATES
 436 #endif
 437 !EOF!
 438
 439 # ssize_t is the signed version of size_t
 440 if [ -n "${ssize_t}" ] ; then
 441     echo "typedef ${ssize_t} ${macro_prefix}ssize_t;"
 442 elif [ -z "${size_t}" ] ; then
 443     echo "typedef long ${macro_prefix}ssize_t;"
 444 else
 445     # Remove "unsigned" from ${size_t} to get ${ssize_t}.
 446     tmp="`echo ${size_t} | ${SED} -e 's|unsigned||g' -e 's|  | |g'`"
 447     if [ -z "$tmp" ] ; then
 448         tmp=int
 449     else
 450         # check $tmp doesn't conflict with <unistd.h>
 451         echo "#include <unistd.h>
 452         extern $tmp read();" >dummy.c
 453         ${CC} -c dummy.c >/dev/null 2>&1 || tmp=int
 454     fi
 455     echo "typedef $tmp /* default */ ${macro_prefix}ssize_t;"
 456 fi
 457
 458 # wint_t is often the integral type to which wchar_t promotes.
 459 if [ -z "${wint_t}" ] ; then
 460   for TYPE in int 'unsigned int' 'long int' 'long unsigned int'; do
 461     cat >dummy.C <<!EOF!
 462 #ifndef __WCHAR_TYPE__
 463 #define __WCHAR_TYPE__ ${wchar_t-int /* default */}
 464 #endif
 465 typedef __WCHAR_TYPE__ ${macro_prefix}wchar_t;
 466 void foo ($TYPE);
 467 void foo (double);
 468 void bar (${macro_prefix}wchar_t w)
 469 {
 470   foo (w);
 471 }
 472 !EOF!
 473     if ${CXX} -c dummy.C >/dev/null 2>&1 ; then
 474       wint_t="$TYPE /* default */"
 475       break
 476     fi
 477   done
 478 fi
 479 echo "typedef ${wint_t-int /* wchar_t is broken */} ${macro_prefix}wint_t;"
 480
 481 # va_list can cause problems (e.g. some systems have va_list as a struct).
 482 # Check to see if ${va_list-char*} really is compatible with stdarg.h.
 483 cat >dummy.C <<!EOF!
 484 #define X_va_list ${va_list-char* /* default */}
 485 extern long foo(X_va_list ap); /* Check that X_va_list compiles on its own */
 486 extern "C" {
 487 #include <stdarg.h>
 488 }
 489 long foo(X_va_list ap) { return va_arg(ap, long); }
 490 long bar(int i, ...)
 491 { va_list ap; long j; va_start(ap, i); j = foo(ap); va_end(ap); return j; }
 492 !EOF!
 493 if ${CXX} -c dummy.C >/dev/null 2>&1 ; then
 494   # Ok: We have something that works.
 495   echo "typedef ${va_list-char* /* default */} ${macro_prefix}va_list;"
 496 else
 497   echo "#define ${macro_prefix}NEED_STDARG_H"
 498   # Check and see if we have __gnuc_va_list, as we might set up define
 499   # loops if we use va_list.
 500   cat >dummy.C <<!EOF!
 501 #include <stdarg.h>
 502 long foo(__gnuc_va_list ap) { return va_arg(ap, long); }
 503 !EOF!
 504   if ${CXX} -c dummy.C >/dev/null 2>&1 ; then
 505     echo "#define ${macro_prefix}va_list __gnuc_va_list"
 506   else
 507     echo "#define ${macro_prefix}va_list va_list"
 508   fi
 509 fi
 510
 511 cat >dummy.c <<!EOF!
 512 #include <signal.h>
 513 extern int (*signal())();
 514 extern int dummy (int);
 515 main()
 516 {
 517     int (*oldsig)(int) = signal (1, dummy);
 518     (void) signal (2, oldsig);
 519     return 0;
 520 }
 521 !EOF!
 522 if ${CC} -c dummy.c >/dev/null 2>&1 ; then
 523   echo "#define ${macro_prefix}signal_return_type int"
 524 else
 525   echo "#define ${macro_prefix}signal_return_type void"
 526 fi
 527
 528 # check sprintf return type
 529
 530 cat >dummy.c <<!EOF!
 531 #include <stdio.h>
 532 extern int sprintf(); char buf[100];
 533 int main() { return sprintf(buf, "%d", 34); }
 534 !EOF!
 535 if ${CC} -c dummy.c >/dev/null 2>&1 ; then
 536   echo "#define ${macro_prefix}sprintf_return_type int"
 537 else
 538   echo "#define ${macro_prefix}sprintf_return_type char*"
 539 fi
 540
 541 if test -n "${HAVE_ATEXIT}" ; then
 542  echo "#define ${macro_prefix}HAVE_ATEXIT ${HAVE_ATEXIT}"
 543 else
 544   cat >dummy.c <<!EOF!
 545 #include <stdlib.h>
 546 int main()
 547 {
 548   atexit (0);
 549 }
 550 !EOF!
 551   if ${CC} dummy.c >/dev/null 2>&1 ; then
 552     echo "#define ${macro_prefix}HAVE_ATEXIT 1"
 553   else
 554     echo "#define ${macro_prefix}HAVE_ATEXIT 0"
 555   fi
 556 fi
 557
 558
 559 # *** Check for presence of certain include files ***
 560
 561 # check for sys/resource.h
 562
 563 if test -n "${HAVE_SYS_RESOURCE}" ; then
 564  echo "#define ${macro_prefix}HAVE_SYS_RESOURCE ${HAVE_SYS_RESOURCE}"
 565 else
 566   cat >dummy.c <<!EOF!
 567 #include <sys/types.h>
 568 #include <sys/time.h>
 569 #include <sys/resource.h>
 570   int main()
 571   {
 572     struct rusage res;
 573     getrusage(RUSAGE_SELF, &res);
 574     return (int)(res.ru_utime.tv_sec + (res.ru_utime.tv_usec / 1000000.0));
 575   }
 576 !EOF!
 577   # Note: We link because some systems have sys/resource, but not getrusage().
 578   if ${CC} dummy.c >/dev/null 2>&1 ; then
 579     echo "#define ${macro_prefix}HAVE_SYS_RESOURCE 1"
 580   else
 581     echo "#define ${macro_prefix}HAVE_SYS_RESOURCE 0"
 582   fi
 583 fi
 584
 585 # check for struct tms in sys/times.h
 586
 587 if test -n "${HAVE_SYS_TIMES}" ; then
 588  echo "#define ${macro_prefix}HAVE_SYS_TIMES ${HAVE_SYS_TIMES}"
 589 else
 590  cat >dummy.c <<!EOF!
 591 #include <sys/types.h>
 592 #include <sys/times.h>
 593   int main()
 594   {
 595     struct tms s;
 596     return s.tms_utime;
 597   }
 598 !EOF!
 599   if ${CC} -c dummy.c >/dev/null 2>&1 ; then
 600     echo "#define ${macro_prefix}HAVE_SYS_TIMES 1"
 601   else
 602     echo "#define ${macro_prefix}HAVE_SYS_TIMES 0"
 603   fi
 604 fi
 605
 606 # check for sys/socket.h
 607
 608 if test -n "${HAVE_SYS_SOCKET}" ; then
 609  echo "#define ${macro_prefix}HAVE_SYS_SOCKET ${HAVE_SYS_SOCKET}"
 610 else
 611   echo '#include <sys/types.h>' >dummy.c
 612   echo '#include <sys/socket.h>' >>dummy.c
 613   if ${CC} -c dummy.c >/dev/null 2>&1 ; then
 614     echo "#define ${macro_prefix}HAVE_SYS_SOCKET 1"
 615   else
 616     echo "#define ${macro_prefix}HAVE_SYS_SOCKET 0"
 617   fi
 618 fi
 619
 620 # check for sys/cdefs.h
 621
 622 if test -n "${HAVE_SYS_CDEFS}" ; then
 623  echo "#define ${macro_prefix}HAVE_SYS_CDEFS ${HAVE_SYS_CDEFS}"
 624 else
 625   echo '#include <sys/cdefs.h>' >dummy.c
 626   echo 'extern int myfunc __P((int, int));' >>dummy.c
 627   if ${CC} -c dummy.c >/dev/null 2>&1 ; then
 628     echo "#define ${macro_prefix}HAVE_SYS_CDEFS 1"
 629   else
 630     echo "#define ${macro_prefix}HAVE_SYS_CDEFS 0"
 631   fi
 632 fi
 633
 634 # Check for a (Posix-compatible) sys/wait.h */
 635
 636 if test -n "${HAVE_SYS_WAIT}" ; then
 637  echo "#define ${macro_prefix}HAVE_SYS_WAIT ${HAVE_SYS_WAIT}"
 638 else
 639   cat >dummy.c <<!EOF!
 640 #include <sys/types.h>
 641 #include <sys/wait.h>
 642   int f() { int i; wait(&i); return i; }
 643 !EOF!
 644   if ${CC} -c dummy.c >/dev/null 2>&1 ; then
 645     echo "#define ${macro_prefix}HAVE_SYS_WAIT 1"
 646   else
 647     echo "#define ${macro_prefix}HAVE_SYS_WAIT 0"
 648   fi
 649 fi
 650
 651 if test -n "${HAVE_UNISTD}" ; then
 652  echo "#define ${macro_prefix}HAVE_UNISTD ${HAVE_UNISTD}"
 653 else
 654   echo '#include <unistd.h>' >dummy.c
 655   if ${CC} -c dummy.c >/dev/null 2>&1 ; then
 656     echo "#define ${macro_prefix}HAVE_UNISTD 1"
 657   else
 658     echo "#define ${macro_prefix}HAVE_UNISTD 0"
 659   fi
 660 fi
 661
 662 if test -n "${HAVE_DIRENT}" ; then
 663  echo "#define ${macro_prefix}HAVE_DIRENT ${HAVE_DIRENT}"
 664 else
 665   echo '#include <sys/types.h>
 666 #include <dirent.h>' >dummy.c
 667   if ${CC} -c dummy.c >/dev/null 2>&1 ; then
 668     echo "#define ${macro_prefix}HAVE_DIRENT 1"
 669   else
 670     echo "#define ${macro_prefix}HAVE_DIRENT 0"
 671   fi
 672 fi
 673
 674 if test -n "${HAVE_CURSES}" ; then
 675  echo "#define ${macro_prefix}HAVE_CURSES ${HAVE_CURSES}"
 676 else
 677   echo '#include <curses.h>' >dummy.c
 678   if ${CC} -c dummy.c >/dev/null 2>&1 ; then
 679     echo "#define ${macro_prefix}HAVE_CURSES 1"
 680   else
 681     echo "#define ${macro_prefix}HAVE_CURSES 0"
 682   fi
 683 fi
 684
 685 # There is no test for this at the moment; it is just set by the
 686 # configuration files.
 687 if test -n "${MATH_H_INLINES}" ; then
 688   echo "#define ${macro_prefix}MATH_H_INLINES ${MATH_H_INLINES}"
 689 else
 690   echo "#define ${macro_prefix}MATH_H_INLINES 0"
 691 fi
 692
 693 if test -n "${HAVE_BOOL}" ; then
 694  echo "#define ${macro_prefix}HAVE_BOOL ${HAVE_BOOL}"
 695 else
 696   echo 'bool i=true,j=false;' >dummy.C
 697   if ${CXX} -c dummy.C >/dev/null 2>&1 ; then
 698     echo "#define ${macro_prefix}HAVE_BOOL 1"
 699   else
 700     echo "#define ${macro_prefix}HAVE_BOOL 0"
 701   fi
 702 fi
 703
 704 if test -n "${NO_USE_DTOA}" ; then
 705     echo "#define ${macro_prefix}NO_USE_DTOA 1"
 706 fi
 707 if test -n "${USE_INT32_FLAGS}" ; then
 708     echo "#define ${macro_prefix}USE_INT32_FLAGS 1"
 709 fi
 710
 711 # A little test program to check if __printf_fp is available.
 712 cat >dummy.c <<EOF
 713 int main()
 714 {
 715     return __printf_fp ();
 716 }
 717 EOF
 718
 719 if ${CC} dummy.c >/dev/null 2>&1 ; then
 720   echo "#define ${macro_prefix}HAVE_PRINTF_FP 1"
 721   echo "#define ${macro_prefix}HAVE_LONG_DOUBLE_IO 1"
 722 else
 723   echo "#define ${macro_prefix}HAVE_PRINTF_FP 0"
 724   echo "#define ${macro_prefix}HAVE_LONG_DOUBLE_IO 0"
 725 fi
 726
 727 # Uncomment the following line if you don't have working templates.
 728 # echo "#define ${macro_prefix}NO_TEMPLATES"
 729
 730 # Override bogus definitions of NULL in system headers.
 731 cat <<EOF
 732 #undef NULL
 733 #define __need_NULL
 734 #include <stddef.h>
 735 EOF
 736
 737 rm -f dummy.C dummy.o dummy.c dummy.out TMP core a.out
 738
 739 echo "#endif /* !${macro_prefix}config_h */"