Try to fix build on appveyor (mingw).

diff --git a/src/include/surf/maxmin.hpp b/src/include/surf/maxmin.hpp
index e1ec09e..97239fd 100644 (file)
--- a/src/include/surf/maxmin.hpp
+++ b/src/include/surf/maxmin.hpp
@@ -163,7 +163,7 @@ XBT_PUBLIC(double) func_vegas_fpi(lmm_variable_t var, double x);
  * Then, it is used to list all variables involved in constraint through constraint's xxx_element_set lists, or
  * vice-versa list all constraints for a given variable.
  */
-class s_lmm_element_t {
+XBT_PUBLIC_CLASS s_lmm_element_t {
 public:
   int get_concurrency() const;
   void decrease_concurrency();
@@ -200,7 +200,7 @@ struct s_lmm_constraint_light_t {
  * \li Active elements which variable's weight is non-zero (i.e. it is enabled) AND its element value is non-zero.
  *     LMM_solve iterates over active elements during resolution, dynamically making them active or unactive.
  */
-class s_lmm_constraint_t {
+XBT_PUBLIC_CLASS s_lmm_constraint_t {
 public:
   s_lmm_constraint_t() = default;
   s_lmm_constraint_t(void* id_value, double bound_value);
@@ -320,7 +320,7 @@ private:
  * When something prevents us from enabling a variable, we "stage" the weight that we would have like to set, so that as
  * soon as possible we enable the variable with desired weight
  */
-class s_lmm_variable_t {
+XBT_PUBLIC_CLASS s_lmm_variable_t {
 public:
   void initialize(simgrid::surf::Action* id_value, double sharing_weight_value, double bound_value,
                   int number_of_constraints, unsigned visited_value);
@@ -427,7 +427,7 @@ inline void s_lmm_element_t::make_inactive()
 /**
  * @brief LMM system
  */
-class s_lmm_system_t {
+XBT_PUBLIC_CLASS s_lmm_system_t {
 public:
   /**
    * @brief Create a new Linear MaxMim system