Make use of pkg-config to retrieve gcc and ld options for liblasso

SoObjects/SOGo/GNUmakefile.preamble

@@ -37,7 +37,8 @@ endif
 endif
 
 ifeq ($(HAS_LIBRARY_lasso), yes)
-SOGo_LIBRARIES_DEPEND_UPON += -llasso
+ADDITIONAL_CPPFLAGS += $(LASSO_CFLAGS)
+SOGo_LIBRARIES_DEPEND_UPON += $(LASSO_LIBS)
 endif
 
 ifeq ($(findstring openbsd, $(GNUSTEP_HOST_OS)), openbsd)

configure

@@ -377,6 +377,12 @@ EOF
 checkDependencies() {
   if test "x$ARG_ENABLE_SAML2" = "x1"; then
       checkLinking "lasso"   required;
+      if test $? = 0; then
+          lasso_cflags="`pkg-config lasso --cflags`"
+          cfgwrite "LASSO_CFLAGS := $lasso_cflags"
+          lasso_libs="`pkg-config lasso --libs`"
+          cfgwrite "LASSO_LIBS := $lasso_libs"
+      fi;
   fi
   if test "x$ARG_CFGSSL" = "xauto"; then
       checkLinking "ssl"     optional;