Update to rra-c-util 10.5

[kerberos/krb5-strength.git] / m4 / sqlite3.m4

diff --git a/m4/sqlite3.m4 b/m4/sqlite3.m4
new file mode 100644 (file)
index 0000000..597a612
--- /dev/null
+++ b/m4/sqlite3.m4
@@ -0,0 +1,91 @@
+# serial 1
+
+dnl Find the compiler and linker flags for SQLite v3.
+dnl
+dnl Finds the compiler and linker flags for linking with the SQLite library.
+dnl Provides the --with-sqlite3, --with-sqlite3-lib, and
+dnl --with-sqlite3-include configure options to specify non-standard paths to
+dnl the SQLite v3 libraries or header files.
+dnl
+dnl Provides the macro RRA_LIB_SQLITE3 and sets the substitution variables
+dnl SQLITE3_CPPFLAGS, SQLITE3_LDFLAGS, and SQLITE3_LIBS.  Also provides
+dnl RRA_LIB_SQLITE3_SWITCH to set CPPFLAGS, LDFLAGS, and LIBS to include the
+dnl SQLite library, saving the current values first, and
+dnl RRA_LIB_SQLITE3_RESTORE to restore those settings to before the last
+dnl RRA_LIB_SQLITE3_SWITCH.  Defines HAVE_SQLITE3 and sets rra_use_SQLITE3 to
+dnl true.
+dnl
+dnl Provides the RRA_LIB_SQLITE3_OPTIONAL macro, which should be used if
+dnl SQLite support is optional.  This macro will still always set the
+dnl substitution variables, but they'll be empty if the SQLite library is not
+dnl found or if --without-sqlite3 is given.  Defines HAVE_SQLITE3 and sets
+dnl rra_use_SQLITE3 to true if the SQLite library is found and
+dnl --without-sqlite3 is not given.
+dnl
+dnl Depends on the lib-helper.m4 framework and the Autoconf macros that come
+dnl with pkg-config.
+dnl
+dnl The canonical version of this file is maintained in the rra-c-util
+dnl package, available at <https://www.eyrie.org/~eagle/software/rra-c-util/>.
+dnl
+dnl Written by Russ Allbery <eagle@eyrie.org>
+dnl Copyright 2020, 2022 Russ Allbery <eagle@eyrie.org>
+dnl Copyright 2014
+dnl     The Board of Trustees of the Leland Stanford Junior University
+dnl
+dnl This file is free software; the authors give unlimited permission to copy
+dnl and/or distribute it, with or without modifications, as long as this
+dnl notice is preserved.
+dnl
+dnl SPDX-License-Identifier: FSFULLR
+
+dnl Save the current CPPFLAGS, LDFLAGS, and LIBS settings and switch to
+dnl versions that include the SQLite 3 flags.  Used as a wrapper, with
+dnl RRA_LIB_SQLITE3_RESTORE, around tests.
+AC_DEFUN([RRA_LIB_SQLITE3_SWITCH], [RRA_LIB_HELPER_SWITCH([SQLITE3])])
+
+dnl Restore CPPFLAGS, LDFLAGS, and LIBS to their previous values before
+dnl RRA_LIB_SQLITE3_SWITCH was called.
+AC_DEFUN([RRA_LIB_SQLITE3_RESTORE], [RRA_LIB_HELPER_RESTORE([SQLITE3])])
+
+dnl Checks if SQLite v3 is present.  The single argument, if "true", says to
+dnl fail if the SQLite library could not be found.  Prefer probing with
+dnl pkg-config if available and the --with flags were not given.
+AC_DEFUN([_RRA_LIB_SQLITE3_INTERNAL],
+[RRA_LIB_HELPER_PATHS([SQLITE3])
+ AS_IF([test x"$SQLITE3_CPPFLAGS" = x && test x"$SQLITE3_LDFLAGS" = x],
+    [PKG_CHECK_EXISTS([sqlite3],
+        [PKG_CHECK_MODULES([SQLITE3], [sqlite3])
+         SQLITE3_CPPFLAGS="$SQLITE3_CFLAGS"])])
+ AS_IF([test x"$SQLITE3_LIBS" = x],
+    [RRA_LIB_SQLITE3_SWITCH
+     LIBS=
+     AC_SEARCH_LIBS([sqlite3_open_v2], [sqlite3],
+        [SQLITE3_LIBS="$LIBS"],
+        [AS_IF([test x"$1" = xtrue],
+            [AC_MSG_ERROR([cannot find usable libsqlite3 library])])])
+     RRA_LIB_SQLITE3_RESTORE])
+ RRA_LIB_SQLITE3_SWITCH
+ AC_CHECK_HEADERS([sqlite3.h])
+ RRA_LIB_SQLITE3_RESTORE])
+
+dnl The main macro for packages with mandatory SQLite v3 support.
+AC_DEFUN([RRA_LIB_SQLITE3],
+[RRA_LIB_HELPER_VAR_INIT([SQLITE3])
+ RRA_LIB_HELPER_WITH([sqlite3], [SQLite v3], [SQLITE3])
+ _RRA_LIB_SQLITE3_INTERNAL([true])
+ rra_use_SQLITE3=true
+ AC_DEFINE([HAVE_SQLITE3], 1, [Define if libsqlite3 is available.])])
+
+dnl The main macro for packages with optional SQLite v3 support.
+AC_DEFUN([RRA_LIB_SQLITE3_OPTIONAL],
+[RRA_LIB_HELPER_VAR_INIT([SQLITE3])
+ RRA_LIB_HELPER_WITH_OPTIONAL([sqlite3], [SQLite v3], [SQLITE3])
+ AS_IF([test x"$rra_use_SQLITE3" != xfalse],
+    [AS_IF([test x"$rra_use_SQLITE3" = xtrue],
+        [_RRA_LIB_SQLITE3_INTERNAL([true])],
+        [_RRA_LIB_SQLITE3_INTERNAL([false])])])
+ AS_IF([test x"$SQLITE3_LIBS" = x],
+    [RRA_LIB_HELPER_VAR_CLEAR([SQLITE3])],
+    [rra_use_SQLITE3=true
+     AC_DEFINE([HAVE_SQLITE3], 1, [Define if libsqlite3 is available.])])])