Fix issue #43

Building the SQLite3 shell with a static SQLite3 library failed for the autoconf tool chain.
Makefile.am has been adjusted to always build the SQLite3 library as an integrated part of the shell.

sqlite3secure/Makefile.am

@@ -8,8 +8,8 @@ ACLOCAL_AMFLAGS = -I ../admin/m4
 
 # Flags used for compiling all the targets and linking all the executables
 # (libraries use LIBADD which is set for lib@[email protected] only).
-AM_CXXFLAGS = -I$(top_srcdir)/src $(WX_CXXFLAGS)
-AM_CFLAGS   = -I$(top_srcdir)/src $(WX_CXXFLAGS)
+AM_CXXFLAGS = -I$(top_srcdir)/src
+AM_CFLAGS   = -I$(top_srcdir)/src
 
 AM_CFLAGS += -std=c99 -DTHREADSAFE=1 -DSQLITE_MAX_ATTACHED=10 -DSQLITE_SOUNDEX -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_HAS_CODEC -DSQLITE_SECURE_DELETE -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_FTS5 -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_RTREE -DSQLITE_CORE -DSQLITE_ENABLE_EXTFUNC -DSQLITE_ENABLE_CSV -DSQLITE_ENABLE_SHA3 -DSQLITE_ENABLE_CARRAY -DSQLITE_ENABLE_FILEIO -DSQLITE_ENABLE_SERIES -DSQLITE_TEMP_STORE=2 -DSQLITE_USE_URI -DSQLITE_USER_AUTHENTICATION 
 
@@ -71,9 +71,13 @@ lib@SQLITE3SECURE_LIBNAME@_la_LIBADD = -ldl -lm
 noinst_PROGRAMS = sqlite3shell
 
 sqlite3shell_SOURCES = \
+    src/sqlite3secure.c \
     src/shell.c
 
-sqlite3shell_LDADD = $(LDADD) -ldl -lm
+sqlite3shell_CFLAGS = -I$(top_srcdir)/src -std=c99 -DTHREADSAFE=1 -DSQLITE_MAX_ATTACHED=10 -DSQLITE_SOUNDEX -DSQLITE_ENABLE_COLUMN_METADATA -DSQLITE_HAS_CODEC -DSQLITE_SECURE_DELETE -DSQLITE_ENABLE_FTS3 -DSQLITE_ENABLE_FTS3_PARENTHESIS -DSQLITE_ENABLE_FTS4 -DSQLITE_ENABLE_FTS5 -DSQLITE_ENABLE_JSON1 -DSQLITE_ENABLE_RTREE -DSQLITE_CORE -DSQLITE_ENABLE_EXTFUNC -DSQLITE_ENABLE_CSV -DSQLITE_ENABLE_CARRAY -DSQLITE_ENABLE_SERIES -DSQLITE_TEMP_STORE=2 -DSQLITE_USE_URI -DSQLITE_USER_AUTHENTICATION 
+
+sqlite3shell_LDADD = -ldl -lm
+sqlite3shell_LDFLAGS = -pthread
 
 if USE_MSW
 sqlite3shell_SOURCES += src/sqlite3shell.rc
@@ -82,6 +86,6 @@ CLEANFILES = src/sqlite3shell.res_o
 else
 # libtool complains about unknown "-no-install" option when targetting MSW, so
 # use it only in the "else" branch.
-sqlite3shell_LDFLAGS = -no-install
+sqlite3shell_LDFLAGS += -no-install
 endif