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From: David Bremner <david@tethera.net>
To: notmuch@notmuchmail.org
Subject: [PATCH 2/3] configure: detect Xapian:FieldProcessor
Date: Sat, 19 Mar 2016 22:38:23 -0300
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Rather than check versions, it seems more robust to do a test compile.
---
 configure | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index eb6dbac..8feb23f 100755
--- a/configure
+++ b/configure
@@ -356,9 +356,10 @@ if [ ${have_xapian} = "0" ]; then
     errors=$((errors + 1))
 fi
 
-# Compaction is only supported on Xapian > 1.2.6
 have_xapian_compact=0
+have_xapian_field_processor=0
 if [ ${have_xapian} = "1" ]; then
+    # Compaction is only supported on Xapian > 1.2.6
     printf "Checking for Xapian compaction support... "
     case "${xapian_version}" in
 	0.*|1.[01].*|1.2.[0-5])
@@ -369,6 +370,25 @@ if [ ${have_xapian} = "1" ]; then
 	*)
 	    printf "Unknown version.\n" ;;
     esac
+
+    printf "Checking for Xapian FieldProcessor API... "
+    cat>_field_processor.cc<<EOF
+#include <xapian.h>
+class TitleFieldProcessor : public Xapian::FieldProcessor {
+    Xapian::Query operator()(const std::string & str) {
+        return Xapian::Query::MatchAll;
+    }
+};
+EOF
+    if ${CXX} ${CXXLAGS} ${xapian_cxxflags} -c _field_processor.cc -o _field_processor.o > /dev/null 2>&1
+    then
+	have_xapian_field_processor=1
+	printf "Yes.\n"
+    else
+	printf "No. (optional)\n"
+    fi
+
+    rm -f _field_processor.o _field_processor.cc
 fi
 
 
@@ -979,6 +999,9 @@ HAVE_D_TYPE = ${have_d_type}
 # Whether the Xapian version in use supports compaction
 HAVE_XAPIAN_COMPACT = ${have_xapian_compact}
 
+# Whether the Xapian version in use supports field processors
+HAVE_XAPIAN_FIELD_PROCESSOR = ${have_xapian_field_processor}
+
 # Whether the getpwuid_r function is standards-compliant
 # (if not, then notmuch will #define _POSIX_PTHREAD_SEMANTICS
 # to enable the standards-compliant version -- needed for Solaris)
@@ -1050,6 +1073,7 @@ CONFIGURE_CFLAGS = -DHAVE_GETLINE=\$(HAVE_GETLINE) \$(GMIME_CFLAGS)      \\
 		   -DSTD_GETPWUID=\$(STD_GETPWUID)                       \\
 		   -DSTD_ASCTIME=\$(STD_ASCTIME)                         \\
 		   -DHAVE_XAPIAN_COMPACT=\$(HAVE_XAPIAN_COMPACT)	 \\
+		   -DHAVE_XAPIAN_FIELD_PROCESSOR=\$(HAVE_XAPIAN_PROCESSOR) \\
 		   -DUTIL_BYTE_ORDER=\$(UTIL_BYTE_ORDER)
 
 CONFIGURE_CXXFLAGS = -DHAVE_GETLINE=\$(HAVE_GETLINE) \$(GMIME_CFLAGS)    \\
@@ -1064,6 +1088,7 @@ CONFIGURE_CXXFLAGS = -DHAVE_GETLINE=\$(HAVE_GETLINE) \$(GMIME_CFLAGS)    \\
 		     -DSTD_GETPWUID=\$(STD_GETPWUID)                     \\
 		     -DSTD_ASCTIME=\$(STD_ASCTIME)                       \\
 		     -DHAVE_XAPIAN_COMPACT=\$(HAVE_XAPIAN_COMPACT)       \\
+		     -DHAVE_XAPIAN_FIELD_PROCESSOR=\$(HAVE_XAPIAN_FIELD_PROCESSOR) \\
 		     -DUTIL_BYTE_ORDER=\$(UTIL_BYTE_ORDER)
 
 CONFIGURE_LDFLAGS =  \$(GMIME_LDFLAGS) \$(TALLOC_LDFLAGS) \$(ZLIB_LDFLAGS) \$(XAPIAN_LDFLAGS)
@@ -1077,6 +1102,9 @@ cat > sh.config <<EOF
 # Whether the Xapian version in use supports compaction
 NOTMUCH_HAVE_XAPIAN_COMPACT=${have_xapian_compact}
 
+# Whether the Xapian version in use supports field processors
+NOTMUCH_HAVE_XAPIAN_FIELD_PROCESSOR=${have_xapian_field_processor}
+
 # do we have man pages?
 NOTMUCH_HAVE_MAN=$((have_sphinx))
 
-- 
2.7.0