libiberty/configure.in

   1 dnl Process this file with autoconf to produce a configure script
   2
   3 AC_PREREQ(2.5)
   4 AC_INIT(pexecute.c)
   5
   6 dnl We use these options to decide which functions to include.
   7 AC_ARG_WITH(target-subdir,
   8 [  --with-target-subdir=SUBDIR      Configuring with a cross compiler])
   9 AC_ARG_WITH(newlib,
  10 [  --with-newlib                    Configuring with newlib])
  11
  12 if test "${srcdir}" = "."; then
  13   if test -z "${with_target_subdir}"; then
  14     libiberty_topdir="${srcdir}/.."
  15   else
  16     if test "${with_target_subdir}" != "."; then
  17       libiberty_topdir="${srcdir}/${with_multisrctop}../.."
  18     else
  19       libiberty_topdir="${srcdir}/${with_multisrctop}.."
  20     fi
  21   fi
  22 else
  23   libiberty_topdir="${srcdir}/.."
  24 fi
  25 AC_CONFIG_AUX_DIR($libiberty_topdir)
  26
  27 AC_CANONICAL_HOST
  28
  29 dnl When we start using automake:
  30 dnl AM_INIT_AUTOMAKE(libiberty, 1.0)
  31
  32 dnl These must be called before AM_PROG_LIBTOOL, because it may want
  33 dnl to call AC_CHECK_PROG.
  34 AC_CHECK_TOOL(AR, ar)
  35 AC_CHECK_TOOL(RANLIB, ranlib, :)
  36
  37 # FIXME: We temporarily define our own version of AC_PROG_CC.  This is
  38 # copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS.  We
  39 # are probably using a cross compiler, which will not be able to fully
  40 # link an executable.  This should really be fixed in autoconf
  41 # itself.
  42
  43 AC_DEFUN(LIB_AC_PROG_CC,
  44 [AC_BEFORE([$0], [AC_PROG_CPP])dnl
  45 AC_PROVIDE([AC_PROG_CC])
  46 AC_CHECK_PROG(CC, gcc, gcc)
  47 if test -z "$CC"; then
  48   AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
  49   test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
  50 fi
  51
  52 AC_PROG_CC_GNU
  53
  54 if test $ac_cv_prog_gcc = yes; then
  55   GCC=yes
  56 dnl Check whether -g works, even if CFLAGS is set, in case the package
  57 dnl plays around with CFLAGS (such as to build both debugging and
  58 dnl normal versions of a library), tasteless as that idea is.
  59   ac_test_CFLAGS="${CFLAGS+set}"
  60   ac_save_CFLAGS="$CFLAGS"
  61   CFLAGS=
  62   AC_PROG_CC_G
  63   if test "$ac_test_CFLAGS" = set; then
  64     CFLAGS="$ac_save_CFLAGS"
  65   elif test $ac_cv_prog_cc_g = yes; then
  66     CFLAGS="-g -O2"
  67   else
  68     CFLAGS="-O2"
  69   fi
  70 else
  71   GCC=
  72   test "${CFLAGS+set}" = set || CFLAGS="-g"
  73 fi
  74 ])
  75
  76 LIB_AC_PROG_CC
  77
  78 AC_ISC_POSIX
  79
  80 dnl When we start using libtool:
  81 dnl Default to a non shared library.  This may be overridden by the
  82 dnl configure option --enable-shared.
  83 dnl AM_DISABLE_SHARED
  84
  85 dnl When we start using libtool:
  86 dnl AM_PROG_LIBTOOL
  87
  88 dnl When we start using automake:
  89 dnl AM_CONFIG_HEADER(config.h:config.in)
  90 AC_CONFIG_HEADER(config.h:config.in)
  91
  92 dnl When we start using automake:
  93 dnl AM_MAINTAINER_MODE
  94 dnl AM_EXEEXT
  95
  96 dnl When we start using automake:
  97 dnl AM_PROG_INSTALL
  98 AC_PROG_INSTALL
  99
 100 . ${srcdir}/config.table
 101 host_makefile_frag=${frag}
 102 AC_SUBST_FILE(host_makefile_frag)
 103
 104 # It's OK to check for header files.  Although the compiler may not be
 105 # able to link anything, it had better be able to at least compile
 106 # something.
 107 AC_CHECK_HEADERS(sys/file.h sys/param.h stdlib.h string.h)
 108
 109 # This is the list of functions which libiberty will provide if they
 110 # are not available on the host.
 111
 112 funcs="asprintf"
 113 funcs="$funcs atexit"
 114 funcs="$funcs basename"
 115 funcs="$funcs bcmp"
 116 funcs="$funcs bcopy"
 117 funcs="$funcs bzero"
 118 funcs="$funcs clock"
 119 funcs="$funcs getcwd"
 120 funcs="$funcs getpagesize"
 121 funcs="$funcs index"
 122 funcs="$funcs insque"
 123 funcs="$funcs memchr"
 124 funcs="$funcs memcmp"
 125 funcs="$funcs memcpy"
 126 funcs="$funcs memmove"
 127 funcs="$funcs memset"
 128 funcs="$funcs random"
 129 funcs="$funcs rename"
 130 funcs="$funcs rindex"
 131 funcs="$funcs sigsetmask"
 132 funcs="$funcs strcasecmp"
 133 funcs="$funcs strchr"
 134 funcs="$funcs strdup"
 135 funcs="$funcs strncasecmp"
 136 funcs="$funcs strrchr"
 137 funcs="$funcs strstr"
 138 funcs="$funcs strtod"
 139 funcs="$funcs strtol"
 140 funcs="$funcs strtoul"
 141 funcs="$funcs tmpnam"
 142 funcs="$funcs vasprintf"
 143 funcs="$funcs vfprintf"
 144 funcs="$funcs vprintf"
 145 funcs="$funcs vsprintf"
 146 funcs="$funcs waitpid"
 147
 148 # Also in the old function.def file: alloca, vfork, getopt.
 149
 150 vars="sys_errlist sys_nerr sys_siglist"
 151
 152 checkfuncs="getrusage on_exit psignal strerror strsignal sysconf times"
 153
 154 # These are neither executed nor required, but they help keep
 155 # autoheader happy without adding a bunch of text to acconfig.h.
 156 if test "x" = "y"; then
 157   AC_CHECK_FUNCS(asprintf atexit basename bcmp bcopy bzero clock getcwd)
 158   AC_CHECK_FUNCS(getpagesize index insque memchr memcmp memcpy memmove)
 159   AC_CHECK_FUNCS(memset random rename rindex sigsetmask strcasecmp)
 160   AC_CHECK_FUNCS(strchr strdup strncasecmp strrchr strstr strtod strtol)
 161   AC_CHECK_FUNCS(strtoul tmpnam vasprintf vfprintf vprintf vsprintf waitpid)
 162   AC_DEFINE(HAVE_SYS_ERRLIST)
 163   AC_DEFINE(HAVE_SYS_NERR)
 164   AC_DEFINE(HAVE_SYS_SIGLIST)
 165   AC_CHECK_FUNCS(getrusage on_exit psignal strerror strsignal sysconf times)
 166 fi
 167
 168 # For each of these functions, if the host does not provide the
 169 # function we want to put FN.o in LIBOBJS, and if the host does
 170 # provide the function, we want to define HAVE_FN in config.h.  Also,
 171 # if the host does not provide alloca, we set ALLOCA to alloca.o
 172
 173 setobjs=
 174 if test -n "${with_target_subdir}"; then
 175
 176   # We are being configured with a cross compiler.  AC_REPLACE_FUNCS
 177   # may not work correctly, because the compiler may not be able to
 178   # link executables.
 179
 180   # If we are being configured for newlib, we know which functions
 181   # newlib provide and which ones we will be expected to provide.
 182
 183   if test "x${with_newlib}" = "xyes"; then
 184     ALLOCA="alloca.o"
 185     LIBOBJS="basename.o insque.o random.o strdup.o vasprintf.o"
 186
 187     for f in $funcs; do
 188       case "$f" in
 189         basename | insque | random | strdup | vasprintf)
 190           ;;
 191         *)
 192           n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 193           AC_DEFINE_UNQUOTED($n)
 194           ;;
 195       esac
 196     done
 197
 198     # newlib doesnt provide any of the variables in $vars, so we
 199     # dont have to check them here.
 200
 201     # Of the functions in $checkfuncs, VxWorks only has strerror.
 202     AC_DEFINE(HAVE_STRERROR)
 203
 204     setobjs=yes
 205
 206   fi
 207 fi
 208
 209 if test -z "${setobjs}"; then
 210   case "${host}" in
 211
 212   *-*-vxworks*)
 213     # Handle VxWorks configuration specially, since on VxWorks the
 214     # libraries are actually on the target board, not in the file
 215     # system.
 216     LIBOBJS="basename.o getpagesize.o insque.o random.o strcasecmp.o"
 217     LIBOBJS="$LIBOBJS strncasecmp.o strdup.o vfork.o waitpid.o vasprintf.o"
 218     for f in $funcs; do
 219       case "$f" in
 220         basename | getpagesize | insque | random | strcasecmp)
 221           ;;
 222         strncasecmp | strdup | vfork | waitpid | vasprintf)
 223           ;;
 224         *)
 225           n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 226           AC_DEFINE_UNQUOTED($n)
 227           ;;
 228       esac
 229     done
 230
 231     # VxWorks doesn't provide any of the variables in $vars, so we
 232     # don't have to check them here.
 233
 234     # Of the functions in $checkfuncs, VxWorks only has strerror.
 235     AC_DEFINE(HAVE_STRERROR)
 236
 237     setobjs=yes
 238     ;;
 239
 240   esac
 241 fi
 242
 243 if test -z "${setobjs}"; then
 244
 245   case "${host}" in
 246
 247   *-*-cygwin32*)
 248     # The cygwin32 library actually uses a couple of files from
 249     # libiberty when it is built.  If we are building a native
 250     # cygwin32, and we run the tests, we will appear to have these
 251     # files.  However, when we go on to build winsup, we will wind up
 252     # with a library which does not have the files, since they should
 253     # have come from libiberty.
 254
 255     # We handle this by removing the functions the winsup library
 256     # provides from our shell variables, so that they appear to be
 257     # missing.
 258
 259     funcs="`echo $funcs | sed -e 's/random//'`"
 260     LIBOBJS="$LIBOBJS random.o"
 261     vars="`echo $vars | sed -e 's/sys_siglist//'`"
 262     checkfuncs="`echo $checkfuncs | sed -e 's/strsignal//' -e 's/psignal//`"
 263     ;;
 264
 265   *-*-mingw32*)
 266     # Under mingw32, sys_nerr and sys_errlist exist, but they are
 267     # macros, so the test below won't find them.
 268     vars="`echo $vars | sed -e 's/sys_nerr//' -e 's/sys_errlist//'`"
 269     AC_DEFINE(HAVE_SYS_NERR)
 270     AC_DEFINE(HAVE_SYS_ERRLIST)
 271     ;;
 272
 273   esac
 274
 275   # We haven't set the list of objects yet.  Use the standard autoconf
 276   # tests.  This will only work if the compiler works.
 277   AC_PROG_CC_WORKS
 278   AC_REPLACE_FUNCS($funcs)
 279   AC_FUNC_ALLOCA
 280   AC_FUNC_VFORK
 281   if test $ac_cv_func_vfork_works = no; then
 282     LIBOBJS="$LIBOBJS vfork.o"
 283   fi
 284   for v in $vars; do
 285     AC_MSG_CHECKING([for $v])
 286     AC_CACHE_VAL(libiberty_cv_var_$v,
 287       [AC_TRY_LINK([int *p;], [extern int $v; p = &$v;],
 288                    [eval "libiberty_cv_var_$v=yes"],
 289                    [eval "libiberty_cv_var_$v=no"])])
 290     if eval "test \"`echo '$libiberty_cv_var_'$v`\" = yes"; then
 291       AC_MSG_RESULT(yes)
 292       n=HAVE_`echo $v | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 293       AC_DEFINE_UNQUOTED($n)
 294     else
 295       AC_MSG_RESULT(no)
 296     fi
 297   done
 298   AC_CHECK_FUNCS($checkfuncs)
 299 fi
 300
 301 # Install a library built with a cross compiler in $(tooldir) rather
 302 # than $(libdir).
 303 if test -z "${with_target_subdir}"; then
 304   INSTALL_DEST=libdir
 305 else
 306   INSTALL_DEST=tooldir
 307 fi
 308 AC_SUBST(INSTALL_DEST)
 309
 310 # We need multilib support, but only if configuring for the target.
 311 AC_OUTPUT(Makefile,
 312 [test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
 313 if test -n "$CONFIG_FILES"; then
 314   if test -n "${with_target_subdir}"; then
 315     # FIXME: We shouldn't need to set ac_file
 316     ac_file=Makefile
 317     . ${libiberty_topdir}/config-ml.in
 318   fi
 319 fi],
 320 srcdir=${srcdir}
 321 host=${host}
 322 target=${target}
 323 with_target_subdir=${with_target_subdir}
 324 with_multisubdir=${with_multisubdir}
 325 ac_configure_args="--enable-multilib ${ac_configure_args}"
 326 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 327 libiberty_topdir=${libiberty_topdir}
 328 )