forked from osmocom/wireshark
23d1a63f39
even if it doesn't have "gzgets()", so one might think we could use it by using our own replacement for "gzgets()". One would be wrong to think so, however, as the "gzseek()" it has doesn't actually work when reading uncompressed files. zlib 1.0.9 has "gzgets()", and fixes that bug, so we rever to checking for "gzgets()" rather than "gzseek()", so that we don't accept pre-1.0.9 versions of zlib, and we get rid of our "gzgets()" replacement. svn path=/trunk/; revision=4702
98 lines
3 KiB
Text
98 lines
3 KiB
Text
dnl Macros that test for specific features.
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dnl This file is part of the Autoconf packaging for Ethereal.
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dnl Copyright (C) 1998-2000 by Gerald Combs.
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dnl
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dnl $Id: acinclude.m4,v 1.13 2002/02/06 09:58:30 guy Exp $
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dnl
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#
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# AC_WIRETAP_PCAP_CHECK
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#
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AC_DEFUN(AC_WIRETAP_PCAP_CHECK,
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[
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if test -z "$pcap_dir"
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then
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#
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# The user didn't specify a directory in which libpcap resides;
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# we assume that the current library search path will work,
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# but we may have to look for the header in a "pcap"
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# subdirectory of "/usr/include" or "/usr/local/include",
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# as some systems apparently put "pcap.h" in a "pcap"
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# subdirectory, and we also check "$prefix/include".
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#
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# XXX - should we just add "$prefix/include" to the include
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# search path?
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#
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AC_MSG_CHECKING(for extraneous pcap header directories)
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found_pcap_dir=""
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for pcap_dir in /usr/include/pcap /usr/local/include/pcap $prefix/include
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do
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if test -d $pcap_dir ; then
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CFLAGS="$CFLAGS -I$pcap_dir"
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CPPFLAGS="$CPPFLAGS -I$pcap_dir"
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found_pcap_dir=" $found_pcap_dir -I$pcap_dir"
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fi
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done
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if test "$found_pcap_dir" != "" ; then
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AC_MSG_RESULT(found --$found_pcap_dir added to CFLAGS)
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else
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AC_MSG_RESULT(not found)
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fi
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else
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#
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# The user specified a directory in which libpcap resides,
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# so add the "include" subdirectory of that directory to
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# the include file search path.
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#
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# XXX - if there's also a libpcap in a directory that's
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# already in CFLAGS, CPPFLAGS, or LDFLAGS, this won't
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# make us find the version in the specified directory,
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# as the compiler and/or linker will search that other
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# directory before it searches the specified directory.
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#
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CFLAGS="$CFLAGS -I$pcap_dir/include"
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CPPFLAGS="$CPPFLAGS -I$pcap_dir/include"
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fi
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# Pcap header check
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AC_CHECK_HEADERS(pcap.h)
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])
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#
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# AC_WIRETAP_ZLIB_CHECK
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#
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AC_DEFUN(AC_WIRETAP_ZLIB_CHECK,
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[
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AC_CHECK_HEADER(zlib.h,,enable_zlib=no)
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if test x$enable_zlib != xno
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then
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#
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# Well, we at least have the zlib header file.
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#
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# Check for "gzgets()" in zlib, because we need it, but
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# some older versions of zlib don't have it. It appears
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# from the zlib ChangeLog that any released version of zlib
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# with "gzgets()" should have the other routines we
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# depend on, such as "gzseek()", "gztell()", and "zError()".
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#
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# Another reason why we require "gzgets()" is that
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# some versions of zlib that didn't have it, such
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# as 1.0.8, had a bug in "gzseek()" that meant that it
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# doesn't work correctly on uncompressed files; this
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# means we cannot use version 1.0.8. (Unfortunately,
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# that's the version that comes with recent X11 source,
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# and many people who install XFree86 on their Slackware
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# boxes don't realize that they should configure it to
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# use the native zlib rather than building and installing
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# the crappy old version that comes with XFree86.)
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#
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# I.e., we can't just avoid using "gzgets()", as
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# versions of zlib without "gzgets()" are likely to have
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# a broken "gzseek()".
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#
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AC_CHECK_LIB(z, gzgets,,enable_zlib=no)
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fi
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])
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