configure: detect --prefix when checking for P11_KIT

If HAVE_P11KIT flag is set, install location will be changed (e.g.
'/usr/lib/x86_64-linux-gnu/pkcs11' on Ubuntu with libp11-kit-dev
package) even overwriting the path given by --prefix

This patch ensures that if --prefix is given even with the flag
HAVE_P11KIT is set, the install location will still use --prefix

Signed-off-by: Lim, Lukaz Wei Hwang <lukaz.wei.hwang.lim@intel.com>

Makefile.am

@@ -57,6 +57,10 @@ endif # HAVE_LD_VERSION_SCRIPT
 src_libtpm2_pkcs11_la_LIBADD = $(AM_LDFLAGS)
 src_libtpm2_pkcs11_la_SOURCES = $(LIB_PKCS11_SRC) $(LIB_PKCS11_INTERNAL_LIB_SRC)
 
+if HAVE_PREFIX
+  # Use standard install location when using --prefix
+  lib_LTLIBRARIES = $(libtpm2_pkcs11)
+else
 if HAVE_P11KIT
   # Use P11 kit library module install location
   p11libdir=$(P11_MODULE_PATH)
@@ -69,6 +73,7 @@ else
   # Use standard install location when P11Kit is not found
   lib_LTLIBRARIES = $(libtpm2_pkcs11)
 endif
+endif
 
 AM_DISTCHECK_CONFIGURE_FLAGS = --with-p11kitconfigdir='$$(datarootdir)/p11kitconfigdir' --with-p11kitmoduledir='$$(libdir)'
 

configure.ac

@@ -485,6 +485,10 @@ AS_IF([test "x$have_p11kit" = "xyes"], [
 
 AM_CONDITIONAL([HAVE_P11KIT], [test "x$have_p11kit" = "xyes"])
 
+# check for --prefix and set flag HAVE_PREFIX if found
+#   do not change install location if --prefix is given and with P11_KIT found
+AM_CONDITIONAL([HAVE_PREFIX], [test ! -z "$(prefix)"])
+
 # END P11 CONFIG
 
 AC_C_BIGENDIAN()