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- # hints/linux.sh
- # Original version by rsanders
- # Additional support by Kenneth Albanowski <kjahds@kjahds.com>
- #
- # ELF support by H.J. Lu <hjl@nynexst.com>
- # Additional info from Nigel Head <nhead@ESOC.bitnet>
- # and Kenneth Albanowski <kjahds@kjahds.com>
- #
- # Consolidated by Andy Dougherty <doughera@lafcol.lafayette.edu>
- #
- # Updated Thu Feb 8 11:56:10 EST 1996
-
- # Updated Thu May 30 10:50:22 EDT 1996 by <doughera@lafcol.lafayette.edu>
-
- # Updated Fri Jun 21 11:07:54 EDT 1996
- # NDBM support for ELF renabled by <kjahds@kjahds.com>
-
- # perl goes into the /usr tree. See the Filesystem Standard
- # available via anonymous FTP at tsx-11.mit.edu in
- # /pub/linux/docs/linux-standards/fsstnd.
- # Allow a command line override, e.g. Configure -Dprefix=/foo/bar
- case "$prefix" in
- '') prefix='/usr' ;;
- esac
-
- # gcc-2.6.3 defines _G_HAVE_BOOL to 1, but doesn't actually supply bool.
- ccflags="-Dbool=char -DHAS_BOOL $ccflags"
-
- # BSD compatability library no longer needed
- set `echo X "$libswanted "| sed -e 's/ bsd / /'`
- shift
- libswanted="$*"
-
- # Configure may fail to find lstat() since it's a static/inline
- # function in <sys/stat.h>.
- d_lstat=define
-
- # Explanation?
- case "$usemymalloc" in
- '') usemymalloc='n' ;;
- esac
-
- case "$optimize" in
- '') optimize='-O2' ;;
- esac
-
- # Are we using ELF? Thanks to Kenneth Albanowski <kjahds@kjahds.com>
- # for this test.
- cat >try.c <<'EOM'
- /* Test for whether ELF binaries are produced */
- #include <fcntl.h>
- #include <stdlib.h>
- main() {
- char buffer[4];
- int i=open("a.out",O_RDONLY);
- if(i==-1)
- exit(1); /* fail */
- if(read(i,&buffer[0],4)<4)
- exit(1); /* fail */
- if(buffer[0] != 127 || buffer[1] != 'E' ||
- buffer[2] != 'L' || buffer[3] != 'F')
- exit(1); /* fail */
- exit(0); /* succeed (yes, it's ELF) */
- }
- EOM
- if ${cc:-gcc} try.c >/dev/null 2>&1 && ./a.out; then
- cat <<'EOM' >&4
-
- You appear to have ELF support. I'll try to use it for dynamic loading.
- If dynamic loading doesn't work, read hints/linux.sh for further information.
- EOM
-
- #For RedHat Linux 3.0.3, you may need to fetch
- # ftp://ftp.redhat.com/pub/redhat-3.0.3/i386/updates/RPMS/ld.so-1.7.14-3.i386.rpm
- #
-
- else
- cat <<'EOM' >&4
-
- You don't have an ELF gcc. I will use dld if possible. If you are
- using a version of DLD earlier than 3.2.6, or don't have it at all, you
- should probably upgrade. If you are forced to use 3.2.4, you should
- uncomment a couple of lines in hints/linux.sh and restart Configure so
- that shared libraries will be disallowed.
-
- EOM
- lddlflags="-r $lddlflags"
- # These empty values are so that Configure doesn't put in the
- # Linux ELF values.
- ccdlflags=' '
- cccdlflags=' '
- ccflags="-DOVR_DBL_DIG=14 $ccflags"
- so='sa'
- dlext='o'
- nm_so_opt=' '
- ## If you are using DLD 3.2.4 which does not support shared libs,
- ## uncomment the next two lines:
- #ldflags="-static"
- #so='none'
-
- # In addition, on some systems there is a problem with perl and NDBM
- # which causes AnyDBM and NDBM_File to lock up. This is evidenced
- # in the tests as AnyDBM just freezing. Apparently, this only
- # happens on a.out systems, so we disable NDBM for all a.out linux
- # systems. If someone can suggest a more robust test
- # that would be appreciated.
- #
- # More info:
- # Date: Wed, 7 Feb 1996 03:21:04 +0900
- # From: Jeffrey Friedl <jfriedl@nff.ncl.omron.co.jp>
- #
- # I tried compiling with DBM support and sure enough things locked up
- # just as advertised. Checking into it, I found that the lockup was
- # during the call to dbm_open. Not *in* dbm_open -- but between the call
- # to and the jump into.
- #
- # To make a long story short, making sure that the *.a and *.sa pairs of
- # /usr/lib/lib{m,db,gdbm}.{a,sa}
- # were perfectly in sync took care of it.
- #
- # This will generate a harmless Whoa There! message
- case "$d_dbm_open" in
- '') cat <<'EOM' >&4
-
- Disabling ndbm. This will generate a Whoa There message in Configure.
- Read hints/linux.sh for further information.
- EOM
- # You can override this with Configure -Dd_dbm_open
- d_dbm_open=undef
- ;;
- esac
- fi
-
- rm -f try.c a.out
-
- if /bin/bash -c exit; then
- echo
- echo You appear to have a working bash. Good.
- else
- cat << 'EOM' >&4
-
- *********************** Warning! *********************
- It would appear you have a defective bash shell installed. This is likely to
- give you a failure of op/exec test #5 during the test phase of the build,
- Upgrading to a recent version (1.14.4 or later) should fix the problem.
- ******************************************************
- EOM
-
- fi
-
- # Avoid some troublesome gcvt() functions. With some libc versions,
- # perl -e '$x=1e5; print "$x\n";' prints 1e+5. We'd like it
- # to print 100000 instead, consistent with the integer value given
- # on other platforms. This isn't a bug in gcvt, really; more in our
- # expectations for it. We'd like it to behave exactly as
- # sprintf %.16g, but it isn't documented to do that.
- #
- # We'll use sprintf() instead, since we can control the output more
- # precisely.
- #
- # The next version of Configure will check for this automatically.
- d_Gconvert='sprintf((b),"%.*g",(n),(x))'
-
-