PSPP_OPTIONAL_PREREQ([libxml2])])
dnl Check for zlib.
-AC_SEARCH_LIBS(
- [gzopen], [z],
- [HAVE_ZLIB=yes],
- [HAVE_ZLIB=no
- PSPP_OPTIONAL_PREREQ([zlib])])
-AC_CHECK_HEADERS(
- [zlib.h],
- [],
- [HAVE_ZLIB=no
- PSPP_OPTIONAL_PREREQ([zlib])])
+AC_SEARCH_LIBS([gzopen], [z], [], [PSPP_REQUIRED_PREREQ([zlib])])
+AC_CHECK_HEADERS([zlib.h], [], [PSPP_REQUIRED_PREREQ([zlib])])
dnl Avoid interference between zlib's crc32() function and gnulib's
dnl crc32() function, which have different signatures. PSPP calls
[Avoid making zlib call gnulib's crc32() instead of its own.])
dnl Gnumeric and OpenDocument (read) support requires libxml2 and zlib.
-if test $HAVE_LIBXML2 = yes && test $HAVE_ZLIB = yes; then
+if test $HAVE_LIBXML2 = yes; then
GNM_READ_SUPPORT=yes
ODF_READ_SUPPORT=yes
AC_DEFINE(