commit 8c3976544af138aa5d8bc21aa5bc80ba91babc92
Author: Andrew Savchenko <bircoph@gentoo.org>
Date:   Wed Sep 30 17:12:18 2020 +0300

    add cracklib support to the new build system

diff --git a/Makefile.am b/Makefile.am
index 42068bf..3871295 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -19,9 +19,15 @@ common_apg_sources = \
         convert.c
 
 apg_SOURCES = $(common_apg_sources)
+if HAVE_CRACKLIB
+apg_LDFLAGS = -lcrack
+apg_CPPFLAGS = -DAPG_USE_CRACKLIB -DCRACKLIB_DICTPATH=\"/usr/lib/cracklib_dict\"
+endif
 
 apgd_SOURCES = $(common_apg_sources)
 apgd_CPPFLAGS = -DCLISERV
+apgd_CPPFLAGS += $(apg_CPPFLAGS)
+apgd_LDFLAGS = $(apg_LDFLAGS)
 
 apgbfm_SOURCES = apgbfm.c bloom.c sha/sha.c errors.c getopt.c convert.c
 apgbfm_CPPFLAGS = -DAPGBFM
diff --git a/configure.ac b/configure.ac
index d8fd056..75483d1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,8 +43,16 @@ AC_SEARCH_LIBS([strerror], [cposix])
 AC_CHECK_FUNCS([getpass gettimeofday inet_ntoa memset strchr strerror])
 AC_CHECK_FUNCS([crypt])
 
+AC_ARG_WITH([cracklib],
+    AC_HELP_STRING([--with-cracklib], [Use cracklib for strong password checking [default=no]]))
+AS_IF([test "x$with_cracklib" = "xyes"],[
+    AC_SEARCH_LIBS([FascistCheck],[crack],[HAVE_CRACKLIB=1],
+        AC_MSG_ERROR([cracklib requested but not found]))
+])
+
 LT_PREREQ([2.4.2])
 LT_INIT([win32-dll disable-static pic-only])
 
+AM_CONDITIONAL([HAVE_CRACKLIB],[test "x$HAVE_CRACKLIB" != "x"])
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT