-
-if test x"$with_libpq" != x"no" ; then
- AC_SEARCH_LIBS([PQexec], [pq], [libpq_in_std_lib_path=yes])
-
- AC_ARG_VAR([PG_CONFIG], [Full pathname of the pg_config program shipped with Postgresql])
- if test x"$cross_compiling" != x"yes" ; then
- AC_PATH_PROG([PG_CONFIG], [pg_config], [], [$PATH:/usr/local/pgsql/bin:/usr/pgsql/bin])
- fi
- if test -n "$PG_CONFIG" ; then
- AC_SUBST(PG_CONFIG)
- AC_DEFINE([PSQL_SUPPORT], 1,
- [Define to 1 if building in support for reading from postgres databases.])
- PG_CFLAGS=-I`$PG_CONFIG --includedir`
- AC_SUBST(PG_CFLAGS)
-
- if test "x$libpq_in_std_lib_path" != x"yes" ; then
- PG_LDFLAGS="-L`$PG_CONFIG --libdir` -R`$PG_CONFIG --libdir`"
- fi
- AC_SUBST(PG_LDFLAGS)
-
- PG_LIBS=-lpq
- AC_SUBST(PG_LIBS)
- PKG_CHECK_EXISTS(libssl,
- AC_DEFINE([USE_SSL],1,
- [Define to 1 if the openssl library is present.])
- ,)
- fi
+AC_ARG_VAR([PG_CONFIG],
+ [Full pathname of the pg_config program shipped with Postgresql])
+AC_PATH_PROG([PG_CONFIG], [pg_config], [],
+ [$PATH:/usr/local/pgsql/bin:/usr/pgsql/bin])
+
+if test x"$with_libpq" != x"no" && test -n "$PG_CONFIG" ; then
+ AC_SUBST(PG_CONFIG)
+ PG_CFLAGS=-I`$PG_CONFIG --includedir`
+ AC_SUBST(PG_CFLAGS)
+
+ AC_CHECK_LIB([pq], [PQexec],
+ [:],
+ [PG_LDFLAGS="-L`$PG_CONFIG --libdir` -R`$PG_CONFIG --libdir`"])
+ AC_SUBST(PG_LDFLAGS)
+
+ PG_LIBS=-lpq
+ AC_SUBST(PG_LIBS)
+
+ PKG_CHECK_EXISTS(libssl,
+ AC_DEFINE([USE_SSL],1,
+ [Define to 1 if the openssl library is present.])
+ ,)
+
+ # Now verify that we can actually link against libpq. If we are
+ # cross-compiling and picked up a host libpq, or if libpq is just
+ # badly installed, this will fail.
+ AC_CACHE_CHECK(
+ [whether -lpq links successfully],
+ [pspp_cv_have_libpq],
+ [save_CPPFLAGS=$CPPFLAGS
+ save_LIBS=$LIBS
+ save_LDFLAGS=$LDFLAGS
+ CPPFLAGS="$PG_CFLAGS $CPPFLAGS"
+ LIBS="$PG_LIBS $LIBS"
+ LDFLAGS="$PG_LDFLAGS $LDFLAGS"
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [#include <libpq-fe.h>
+ ], [PQfinish (0);])],
+ [pspp_cv_have_libpq=yes],
+ [pspp_cv_have_libpq=no])
+ CPPFLAGS=$save_CPPFLAGS
+ LIBS=$save_LIBS
+ LDFLAGS=$save_LDFLAGS])
+
+ if test $pspp_cv_have_libpq = yes; then
+ PSQL_SUPPORT=yes
+ AC_DEFINE([PSQL_SUPPORT], [1],
+ [Define to 1 if building in support for reading from postgres
+ databases.])
+ else
+ PSQL_SUPPORT=no
+ PG_CONFIG=
+ PG_CFLAGS=
+ PG_LDFLAGS=
+ PG_LIBS=
+ fi
+else
+ PSQL_SUPPORT=no
+ pspp_cv_have_libpq=no
+fi
+AC_SUBST([PSQL_SUPPORT])
+
+dnl Check for libxml2
+PKG_CHECK_MODULES(
+ [LIBXML2], [libxml-2.0],
+ [HAVE_LIBXML2=yes],
+ [HAVE_LIBXML2=no
+ PSPP_OPTIONAL_PREREQ([libxml2])])
+
+dnl Check for 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
+dnl only gnulib's crc32() directly, but it calls zlib's crc32()
+dnl indirectly through other zlib calls. If we don't rename gnulib's
+dnl crc32(), then zlib will call gnulib's version instead of its own,
+dnl causing failures. (This can happen even if zlib isn't detected
+dnl directly, because other libraries that PSPP uses, e.g. libpng,
+dnl sometimes use zlib themselves.)
+AC_DEFINE(
+ [crc32], [gl_crc32],
+ [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; then
+ GNM_READ_SUPPORT=yes
+ ODF_READ_SUPPORT=yes
+ AC_DEFINE(
+ [GNM_READ_SUPPORT], [1],
+ [Define to 1 if building in support for reading Gnumeric files.])
+ AC_DEFINE(
+ [ODF_READ_SUPPORT], [1],
+ [Define to 1 if building in support for reading OpenDocument files.])
+else
+ GNM_READ_SUPPORT=no
+ ODF_READ_SUPPORT=no