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AC_DEFUN([AX_SQLITE_BUILTIN_FTS5],
[
AC_REQUIRE([AC_PROG_CC])
OLD_CFLAGS="$CFLAGS"
OLD_LDFLAGS="$LDFLAGS"
OLD_LIBS="$LIBS"
CFLAGS="$SQLITE3_CFLAGS"
LDFLAGS="$SQLITE3_LDFLAGS"
LIBS="$SQLITE3_LIBS"
AC_CHECK_HEADERS([sqlite3.h])
AC_CACHE_CHECK([whether SQLite3 has required FTS features],
[ax_cv_sqlite_builtin_fts5],
[
AC_RUN_IFELSE(
[AC_LANG_PROGRAM([[#include <sqlite3.h>]],
[[sqlite3 *db;
int rc;
rc = sqlite3_open(":memory:", &db);
if (rc!=SQLITE_OK) return -1;
rc = sqlite3_exec(db, "create table a(text)", 0, 0, 0);
if (rc!=SQLITE_OK) return -1;
rc = sqlite3_exec(db, "create virtual table t using fts5(content='a',text)", 0, 0, 0);
if (rc!=SQLITE_OK) return -1;]])],
[ax_cv_sqlite_builtin_fts5=yes],
[ax_cv_sqlite_builtin_fts5=no],
[ax_cv_sqlite_builtin_fts5=no])])
CFLAGS="$OLD_CFLAGS"
LDFLAGS="$OLD_LDFLAGS"
LIBS="$OLD_LIBS"
])
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