AC_DEFINE([ELFCORE], 1, [Define for ELF core file support])
])
+AC_MSG_CHECKING(for zlib support)
+AC_ARG_ENABLE(zlib,
+[AS_HELP_STRING([--disable-zlib], [disable zlib compression support @<:@default=auto@:>@])])
+AC_MSG_RESULT($enable_zlib)
+
AC_MSG_CHECKING(for file formats in man section 5)
AC_ARG_ENABLE(fsect-man5,
[ --enable-fsect-man5 enable file formats in man section 5],
AC_CHECK_HEADERS(stddef.h utime.h wchar.h wctype.h limits.h)
AC_CHECK_HEADERS(getopt.h err.h xlocale.h signal.h)
AC_CHECK_HEADERS(sys/mman.h sys/stat.h sys/types.h sys/utime.h sys/time.h)
-AC_CHECK_HEADERS(zlib.h)
+if test "$enable_zlib" != "no"; then
+ AC_CHECK_HEADERS(zlib.h)
+fi
AC_CHECK_TYPE([sig_t],[AC_DEFINE([HAVE_SIG_T],1,[Have sig_t type])],,[
#ifdef HAVE_SIGNAL_H
#include <signal.h>
AC_REPLACE_FUNCS(getopt_long asprintf vasprintf strlcpy strlcat getline ctime_r asctime_r localtime_r gmtime_r pread strcasestr fmtcheck dprintf)
dnl Checks for libraries
-AC_CHECK_LIB(z,gzopen)
+if test "$enable_zlib" != "no"; then
+ AC_CHECK_LIB(z, gzopen)
+fi
if test "$MINGW" = 1; then
AC_CHECK_LIB(gnurx,regexec,,AC_MSG_ERROR([libgnurx is required to build file(1) with MinGW]))
fi
dnl See if we are cross-compiling
AM_CONDITIONAL(IS_CROSS_COMPILE, test "$cross_compiling" = yes)
+dnl Final sanity checks
+if test "$enable_zlib" = "yes"; then
+ if test "$ac_cv_header_zlib_h$ac_cv_lib_z_gzopen" != "yesyes"; then
+ AC_MSG_ERROR([zlib support requested but not found])
+ fi
+elif test "$ac_cv_header_zlib_h$ac_cv_lib_z_gzopen" = "yesyes"; then
+ AC_DEFINE([ZLIBSUPPORT], 1, [Enable zlib compression support])
+fi
+
AC_CONFIG_FILES([Makefile src/Makefile magic/Makefile tests/Makefile doc/Makefile python/Makefile])
AC_OUTPUT
#include "file.h"
#ifndef lint
-FILE_RCSID("@(#)$File: compress.c,v 1.96 2016/04/20 00:00:26 christos Exp $")
+FILE_RCSID("@(#)$File: compress.c,v 1.97 2016/05/13 23:02:28 christos Exp $")
#endif
#include "magic.h"
#if defined(HAVE_SYS_TIME_H)
#include <sys/time.h>
#endif
-#if defined(HAVE_ZLIB_H) && defined(HAVE_LIBZ)
+#if defined(HAVE_ZLIB_H)
#define BUILTIN_DECOMPRESS
#include <zlib.h>
-#define ZLIBSUPPORT
#endif
#ifdef DEBUG
int tty = -1;