dnl This file is an input file used by the GNU "autoconf" program to dnl generate the file "configure", which is run during Tk installation dnl to configure the system for the local environment. AC_INIT(tk.h) # @(#) configure.in 1.17 95/06/27 21:54:20 AC_PROG_INSTALL AC_PROG_RANLIB AC_PREFIX_PROGRAM(wish) CC=${CC-cc} AC_SUBST(CC) AC_HAVE_HEADERS(unistd.h limits.h) #-------------------------------------------------------------------- # Include sys/select.h if it exists and if it supplies things # that appear to be useful and aren't already in sys/types.h. # This appears to be true only on the RS/6000 under AIX. Some # systems like OSF/1 have a sys/select.h that's of no use, and # other systems like SCO UNIX have a sys/select.h that's # pernicious. If "fd_set" isn't defined anywhere then set a # special flag. #-------------------------------------------------------------------- AC_MSG_CHECKING([fd_set and sys/select]) AC_TRY_COMPILE([#include ], [fd_set readMask, writeMask;], tk_ok=yes, tk_ok=no) if test $tk_ok = no; then AC_HEADER_EGREP(fd_mask, sys/select.h, tk_ok=yes) if test $tk_ok = yes; then AC_DEFINE(HAVE_SYS_SELECT_H) fi fi AC_MSG_RESULT($tk_ok) if test $tk_ok = no; then AC_DEFINE(NO_FD_SET) fi #-------------------------------------------------------------------- # Supply a substitute for stdlib.h if it doesn't define strtol, # strtoul, or strtod (which it doesn't in some versions of SunOS). #-------------------------------------------------------------------- AC_MSG_CHECKING(stdlib.h) AC_HEADER_EGREP(strtol, stdlib.h, tk_ok=yes, tk_ok=no) AC_HEADER_EGREP(strtoul, stdlib.h, , tk_ok=no) AC_HEADER_EGREP(strtod, stdlib.h, , tk_ok=no) if test $tk_ok = no; then AC_DEFINE(NO_STDLIB_H) fi AC_MSG_RESULT($tk_ok) #-------------------------------------------------------------------- # Check for various typedefs and provide substitutes if # they don't exist. #-------------------------------------------------------------------- AC_MODE_T AC_PID_T AC_SIZE_T AC_UID_T #-------------------------------------------------------------------- # Locate the X11 header files and the X11 library archive. Try # the ac_path_x macro first, but if it doesn't find the X stuff # (e.g. because there's no xmkmf program) then check through # a list of possible directories. Under some conditions the # autoconf macro will return an include directory that contains # no include files, so double-check its result just to be safe. #-------------------------------------------------------------------- AC_PATH_X not_really_there="" if test "$no_x" = ""; then if test "$x_includes" = ""; then AC_TRY_CPP([#include ], , not_really_there="yes") else if test ! -r $x_includes/X11/Intrinsic.h; then not_really_there="yes" fi fi fi if test "$no_x" = "yes" -o "$not_really_there" = "yes"; then echo checking for X11 header files XINCLUDES="# no special path needed" AC_TRY_CPP([#include ], , XINCLUDES="nope") if test "$XINCLUDES" = nope; then dirs="/usr/unsupported/include /usr/local/include /usr/X386/include /usr/include/X11R4 /usr/X11R5/include /usr/include/X11R5 /usr/openwin/include /usr/X11/include /usr/sww/include" for i in $dirs ; do if test -r $i/X11/Intrinsic.h; then XINCLUDES=" -I$i" fi done fi else if test "$x_includes" != ""; then XINCLUDES=-I$x_includes else XINCLUDES="# no special path needed" fi fi if test "$XINCLUDES" = nope; then echo "Warning: couldn't find any X11 include files." XINCLUDES="# no include files found" fi AC_SUBST(XINCLUDES) if test "$no_x" = yes; then XLIBSW=nope if test "$XLIBSW" = nope; then dirs="/usr/unsupported/lib /usr/local/lib /usr/X386/lib /usr/lib/X11R4 /usr/X11R5/lib /usr/lib/X11R5 /usr/openwin/lib /usr/X11/lib /usr/sww/X11/lib" for i in $dirs ; do if test -r $i/libX11.a; then XLIBSW="-L$i -lX11" fi done fi else if test "$x_libraries" = ""; then XLIBSW=-lX11 else XLIBSW="-L$x_libraries -lX11" fi fi if test "$XLIBSW" = nope ; then AC_CHECK_LIB(Xwindow, XCreateWindow, XLIBSW=-lXwindow) fi if test "$XLIBSW" = nope ; then echo "Warning: couldn't find the X11 library archive. Using -lX11." XLIBSW=-lX11 fi AC_SUBST(XLIBSW) #-------------------------------------------------------------------- # Check for the existence of various libraries. The order here # is important, so that then end up in the right order in the # command line generated by make. The -lsocket and -lnsl libraries # require a couple of special tricks: # 1. Use "connect" and "accept" to check for -lsocket, and # "gethostbyname" to check for -lnsl. # 2. Use each function name only once: can't redo a check because # autoconf caches the results of the last check and won't redo it. # 3. Use -lnsl and -lsocket only if they supply procedures that # aren't already present in the normal libraries. This is because # IRIX 5.2 has libraries, but they aren't needed and they're # bogus: they goof up name resolution if used. # 4. On some SVR4 systems, can't use -lsocket without -lnsl too. # To get around this problem, check for both libraries together # if -lsocket doesn't work by itself. #-------------------------------------------------------------------- AC_CHECK_LIB(Xbsd, main, [LIBS="$LIBS -lXbsd"]) tk_checkBoth=0 AC_CHECK_FUNC(connect, tk_checkSocket=0, tk_checkSocket=1) if test "$tk_checkSocket" = 1; then AC_CHECK_LIB(socket, main, LIBS="$LIBS -lsocket", tk_checkBoth=1) fi if test "$tk_checkBoth" = 1; then tk_oldLibs=$LIBS LIBS="$LIBS -lsocket -lnsl" AC_CHECK_FUNC(accept, tk_checkNsl=0, [LIBS=$tk_oldLibs]) fi AC_CHECK_FUNC(gethostbyname, , AC_CHECK_LIB(nsl, main, [LIBS="$LIBS -lnsl"])) #-------------------------------------------------------------------- # One more check related to the X libraries. The standard releases # of Ultrix don't support the "xauth" mechanism, so send won't work # unless TK_NO_SECURITY is defined. However, there are usually copies # of the MIT X server available as well, which do support xauth. # Check for the MIT stuff and use it if it exists. # # Note: can't use ac_check_lib macro (at least, not in Autoconf 2.1) # because it can't deal with the "-" in the library name. #-------------------------------------------------------------------- if test -d /usr/include/mit ; then AC_MSG_CHECKING([MIT X libraries]) tk_oldCFlags=$CFLAGS CFLAGS="$CFLAGS -I/usr/include/mit" tk_oldLibs=$LIBS LIBS="$LIBS -lX11-mit" AC_TRY_LINK([ #include ], [ XOpenDisplay(0); ], [ AC_MSG_RESULT(yes) XLIBSW="-lX11-mit" XINCLUDES="-I/usr/include/mit" ], AC_MSG_RESULT(no)) CFLAGS=$tk_oldCFlags LIBS=$tk_oldLibs fi #-------------------------------------------------------------------- # Figure out how to find out whether a FILE structure contains # buffered readable data. Some known names for the count field: # _cnt: Most UNIX systems # __cnt: HPUX # _r: BSD # readCount: Sprite # Or, in GNU libc there are two fields, _gptr and _egptr, which # have to be compared. #-------------------------------------------------------------------- AC_MSG_CHECKING([count field in FILE structures]) AC_TRY_COMPILE([#include ], [FILE *f = stdin; f->_cnt = 0;], fcnt="_cnt", ) if test "$fcnt" = ""; then AC_TRY_COMPILE([#include ], [FILE *f = stdin; f->__cnt = 0;], fcnt="__cnt", ) fi if test "$fcnt" = ""; then AC_TRY_COMPILE([#include ], [FILE *f = stdin; f->_r = 0;], fcnt="_r", ) fi if test "$fcnt" = ""; then AC_TRY_COMPILE([#include ], [FILE *f = stdin; f->readCount = 0;], fcnt="readCount", ) fi if test "$fcnt" != ""; then AC_DEFINE_UNQUOTED(TK_FILE_COUNT, $fcnt) fi if test "$fcnt" = ""; then AC_TRY_COMPILE([#include ], [FILE *f = stdin; f->_gptr = f->egptr;], tk_ok=yes, tk_ok=no) if test $tk_ok = yes; then AC_DEFINE(TK_FILE_GPTR) fcnt="_gptr/_egptr" fi fi if test "$fcnt" = ""; then AC_TRY_COMPILE([#include ], [FILE *f = stdin; f->_IO_read_ptr = f->_IO_read_end;], tk_ok=yes, tk_ok=no) if test $tk_ok = yes; then AC_DEFINE(TK_FILE_READ_PTR) fcnt="_IO_read_ptr/_IO_read_end" fi fi if test "$fcnt" = ""; then AC_MSG_RESULT([not found; must supply TkReadDataPending procedure]) else AC_MSG_RESULT("$fcnt") fi #-------------------------------------------------------------------- # On a few very rare systems, all of the libm.a stuff is # already in libc.a. Set compiler flags accordingly. # Also, Linux requires the "ieee" library for math to # work right (and it must appear before "-lm"). #-------------------------------------------------------------------- MATH_LIBS="" AC_CHECK_FUNC(sin, , MATH_LIBS="-lm") AC_CHECK_LIB(ieee, main, [MATH_LIBS="-lieee $MATH_LIBS"]) AC_SUBST(MATH_LIBS) #-------------------------------------------------------------------- # If this system doesn't have a memmove procedure, use memcpy # instead. #-------------------------------------------------------------------- AC_CHECK_FUNC(memmove, , [AC_DEFINE(memmove, memcpy)]) #-------------------------------------------------------------------- # Figure out whether "char" is unsigned. If so, set a # #define. #-------------------------------------------------------------------- AC_MSG_CHECKING(type of "char") AC_TRY_RUN([ int main() { char c; int i; c = 0377; i = c; if (i == -1) { exit(0); } exit(1); }], tk_signed=1, tk_signed=0) if test $tk_signed = 0; then AC_DEFINE(CHAR_UNSIGNED) AC_MSG_RESULT(unsigned) else AC_MSG_RESULT(signed) fi #-------------------------------------------------------------------- # SGI systems don't use the BSD form of the gettimeofday function, # but they have a BSDgettimeofday function that can be used instead. # # Also, check for the existence of a gettimeofday declaration, # to tkPort.h can declare it if it isn't already declared. #-------------------------------------------------------------------- AC_CHECK_FUNC(BSDgettimeofday, AC_DEFINE(HAVE_BSDGETTIMEOFDAY)) AC_MSG_CHECKING([for gettimeofday declaration]) AC_EGREP_HEADER(gettimeofday, sys/time.h, AC_MSG_RESULT(present), [ AC_MSG_RESULT(missing) AC_DEFINE(GETTOD_NOT_DECLARED) ]) #-------------------------------------------------------------------- # Under Solaris 2.4, strtod returns the wrong value for the # terminating character under some conditions. Check for this # and if the problem exists use a substitute procedure # "fixstrtod" (provided by Tcl) that corrects the error. #-------------------------------------------------------------------- AC_CHECK_FUNC(strtod, tk_strtod=1, tk_strtod=0) if test "$tk_strtod" = 1; then AC_MSG_CHECKING([for Solaris 2.4 strtod bug]) AC_TRY_RUN([ extern double strtod(); int main() { char *string = "NaN"; char *term; strtod(string, &term); if ((term != string) && (term[-1] == 0)) { exit(1); } exit(0); }], AC_MSG_RESULT(ok), [ AC_MSG_RESULT(buggy) AC_DEFINE(strtod, fixstrtod) ]) fi AC_OUTPUT(Makefile)