fix(gcc16): import fix, INT_MAX fix and build fix for gcc16

Author: Neiko2002

cpp/CMakeLists.txt

@@ -70,12 +70,11 @@ else()  # Native build
 
   # setup compiler flags
   if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+  # Portable native build: generic code is compiled for the build machine's
+  # baseline ISA only (no explicit AVX-512), so the module imports cleanly on
+  # CPUs without AVX-512. AVX-512 kernels are per-function target attributes
+  # (DEGLIB_TARGET_AVX512*), gated at runtime by deglib::cpu::select_dist().
     target_compile_options(compile-options INTERFACE -O3 -march=native -fpic -w -pthread -ftree-vectorize)
-    if(SUPPORT_AVX512F)
-      target_compile_options(compile-options INTERFACE -mavx512f -mfma)
-    elseif(SUPPORT_AVX2)
-      target_compile_options(compile-options INTERFACE -mavx2 -mfma)
-    endif()
   elseif(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
     target_compile_options(compile-options INTERFACE -O2 -DNDEBUG -march=native -fpic)
   elseif(MSVC)

cpp/deglib/include/deglib/optimization/flas/junker_volgenant_solver.h

@@ -3,6 +3,8 @@
 #define EVP_FLAS_JUNKER_VOLGENANT_SOLVER_H
 
 #include <algorithm>
+#include <climits>
+#include <limits>
 #include <concepts>
 #include <cstddef>
 #include <vector>
@@ -137,7 +139,7 @@ inline void compute_assignment(const int* matrix, int dim, JVScratch& scratch) {
             num_free++;
         } else if (matches[i] == 1) {
             j1 = out_perm[i];
-            min = INT_MAX;
+            min = std::numeric_limits<int>::max();
             for (j = 0; j < dim; j++) {
                 if (j != j1 && matrix[i * dim + j] - v[j] < min) {
                     min = matrix[i * dim + j] - v[j];
@@ -156,7 +158,7 @@ inline void compute_assignment(const int* matrix, int dim, JVScratch& scratch) {
             k++;
             int umin = matrix[i * dim + 0] - v[0];
             j1 = 0;
-            int usubmin = INT_MAX;
+            int usubmin = std::numeric_limits<int>::max();
 
             for (j = 1; j < dim; j++) {
                 int h = matrix[i * dim + j] - v[j];

python/src/deg_cpp/deglib_cpp.cpp

@@ -15,6 +15,7 @@
 #include <pybind11/stl.h>
 
 #include <algorithm>
+#include <climits>
 #include <limits>
 #include <optional>
 #include <stdexcept>