vcpkg/ports/scotch/fix-build.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 83144b41b..1cfe80d42 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,9 +41,9 @@
 ##                                                        ##
 ############################################################
 
-project(SCOTCH)
 cmake_minimum_required(VERSION 3.10)
-enable_language(C Fortran)
+project(SCOTCH)
+enable_language(C)
 
 # Add module directory
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 22a81ffbe..7746b22af 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -95,14 +95,23 @@ endif()
 
 # Thread support in Scotch
 if(THREADS)
-  find_package(Threads)
-  if(Threads_FOUND)
+set(USE_PTHREAD OFF)
+if(NOT WIN32)
+  find_package(Threads REQUIRED)
+  if(CMAKE_USE_PTHREADS_INIT)
     add_definitions(-DCOMMON_PTHREAD -DSCOTCH_PTHREAD)
+    set(USE_PTHREAD ON)
   endif()
   include(CheckPthreadAffinity)
   if(PTHREAD_AFFINITY_LINUX_OK)
     add_definitions(-DCOMMON_PTHREAD_AFFINITY_LINUX)
   endif()
+else()
+  find_package(PThreads4W REQUIRED)
+  add_definitions(-DCOMMON_PTHREAD -DSCOTCH_PTHREAD)
+  link_libraries(PThreads4W::PThreads4W)
+  set(USE_PTHREAD ON)
+endif()
 endif()
 
 # decompression libs
@@ -174,8 +183,9 @@ if(BUILD_LIBSCOTCHMETIS)
 endif(BUILD_LIBSCOTCHMETIS)
 
 # Testing
-add_subdirectory(check)
-
+if(BUILD_TESTING)
+  add_subdirectory(check)
+endif()
 ####################
 #  Export targets  #
 ####################
diff --git a/src/libscotch/CMakeLists.txt b/src/libscotch/CMakeLists.txt
index e3b0cb939..5ab322eca 100644
--- a/src/libscotch/CMakeLists.txt
+++ b/src/libscotch/CMakeLists.txt
@@ -503,12 +503,30 @@ set(SCOTCH_C_SOURCES
   wgraph_part_zr.h
   wgraph_store.c)
 
+add_library(scotcherr library_error.c)
+target_include_directories(scotcherr PUBLIC
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+  $<BUILD_INTERFACE:${GENERATED_INCLUDE_DIR}>
+  $<INSTALL_INTERFACE:include>)
+
+add_dependencies(scotcherr scotch_h)
+
+add_library(scotcherrexit library_error_exit.c)
+target_include_directories(scotcherrexit PUBLIC
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+  $<BUILD_INTERFACE:${GENERATED_INCLUDE_DIR}>
+  $<INSTALL_INTERFACE:include>)
+
+add_dependencies(scotcherrexit scotch_h)
+
 add_library(scotch
   ${SCOTCH_C_SOURCES})
 set_target_properties(scotch PROPERTIES VERSION
   ${SCOTCH_VERSION}.${SCOTCH_RELEASE}.${SCOTCH_PATCHLEVEL})
 add_dependencies(scotch parser_yy_c parser_ll_c)
-target_link_libraries(scotch PUBLIC m)
+if(NOT WIN32)
+    target_link_libraries(scotch PUBLIC m)
+endif()
 target_include_directories(scotch PUBLIC
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
         $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}>
@@ -539,10 +557,14 @@ if(LIBLZMA_FOUND)
 endif()
 
 # Add thread library
-if(Threads_FOUND)
-  target_compile_definitions(scotch PUBLIC COMMON_PTHREAD SCOTCH_PTHREAD)
-  target_link_libraries(scotch PUBLIC Threads::Threads)
-endif(Threads_FOUND)
+if(USE_PTHREAD)
+    target_compile_definitions(scotch PUBLIC COMMON_PTHREAD SCOTCH_PTHREAD)
+    if(NOT WIN32)
+      target_link_libraries(scotch PUBLIC Threads::Threads)
+    else()
+      target_link_libraries(scotch PUBLIC PThreads4W::PThreads4W)
+    endif()
+endif(USE_PTHREAD)
 
 # Include files
 add_dependencies(scotch scotch_h scotchf_h)
@@ -555,21 +577,7 @@ if(CMAKE_BUILD_TYPE STREQUAL Debug)
   target_compile_definitions(scotch PRIVATE SCOTCH_DEBUG_LIBRARY1)
 endif()
 
-add_library(scotcherr library_error.c)
-target_include_directories(scotcherr PUBLIC
-  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
-  $<BUILD_INTERFACE:${GENERATED_INCLUDE_DIR}>
-  $<INSTALL_INTERFACE:include>)
-
-add_dependencies(scotcherr scotch_h)
-
-add_library(scotcherrexit library_error_exit.c)
-target_include_directories(scotcherrexit PUBLIC
-  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
-  $<BUILD_INTERFACE:${GENERATED_INCLUDE_DIR}>
-  $<INSTALL_INTERFACE:include>)
-
-add_dependencies(scotcherrexit scotch_h)
+target_link_libraries(scotch PRIVATE scotcherr)
 
 #################
 #  libPTScotch  #
@@ -769,10 +777,14 @@ if(BUILD_PTSCOTCH)
     set_target_properties(ptscotch PROPERTIES LINK_FLAGS "-undefined dynamic_lookup")
   endif(APPLE)
 
-  if(Threads_FOUND)
-    target_compile_definitions(ptscotch PUBLIC SCOTCH_PTHREAD COMMON_PTHREAD)
-    target_link_libraries(ptscotch PUBLIC Threads::Threads)
-  endif(Threads_FOUND)
+  if(USE_PTHREAD)
+      target_compile_definitions(ptscotch PUBLIC COMMON_PTHREAD SCOTCH_PTHREAD)
+      if(NOT WIN32)
+        target_link_libraries(ptscotch PUBLIC Threads::Threads)
+      else()
+        target_link_libraries(ptscotch PUBLIC PThreads4W::PThreads4W)
+      endif()
+  endif(USE_PTHREAD)
 
   add_library(ptscotcherr library_error.c)
   target_include_directories(ptscotcherr PUBLIC
diff --git a/src/libscotch/common_file_compress.c b/src/libscotch/common_file_compress.c
index e1ccff54d..4dc7673a6 100644
--- a/src/libscotch/common_file_compress.c
+++ b/src/libscotch/common_file_compress.c
@@ -378,8 +378,11 @@ FileCompress * const        compptr)
   encodat.avail_out = FILECOMPRESSDATASIZE;
   do {
     if ((encodat.avail_in == 0) && (enacval == LZMA_RUN)) {
+#ifdef _MSC_VER
+      int                 bytenbr; //According to MSDN _read only returns int
+#else
       ssize_t             bytenbr;
-
+#endif
       bytenbr = read (compptr->infdnum, compptr->bufftab, FILECOMPRESSDATASIZE); /* Read from pipe */
       if (bytenbr < 0) {
         errorPrint ("fileCompressLzma: cannot read");
diff --git a/src/libscotch/common_file_decompress.c b/src/libscotch/common_file_decompress.c
index 648b6f053..02bd9412c 100644
--- a/src/libscotch/common_file_decompress.c
+++ b/src/libscotch/common_file_decompress.c
@@ -373,7 +373,11 @@ FileCompress * const        compptr)
   decodat.avail_out = FILECOMPRESSDATASIZE;
   do {
     if ((decodat.avail_in == 0) && (deacval == LZMA_RUN)) {
+#ifdef _MSC_VER
+      size_t              bytenbr; //According to MSDN fread returns size_t
+#else
       ssize_t             bytenbr;
+#endif
 
       bytenbr = fread (compptr->bufftab, 1, FILECOMPRESSDATASIZE, compptr->oustptr); /* Read from pipe */
       if (ferror (compptr->oustptr)) {
diff --git a/src/libscotch/common_thread.h b/src/libscotch/common_thread.h
index 235d92044..6d35aeb1a 100644
--- a/src/libscotch/common_thread.h
+++ b/src/libscotch/common_thread.h
@@ -81,6 +81,8 @@ typedef struct ThreadContext_ {
   union {                                         /*+ Context save area for main thread   +*/
 #ifdef COMMON_PTHREAD_AFFINITY_LINUX
     cpu_set_t                   cpusdat;          /*+ Original thread mask of main thread +*/
+#else
+    void*                       dummy;
 #endif /* COMMON_PTHREAD_AFFINITY_LINUX */
   }                             savedat;
 #endif /* COMMON_PTHREAD */
diff --git a/src/libscotch/context.c b/src/libscotch/context.c
index 6becac0af..a88da0099 100644
--- a/src/libscotch/context.c
+++ b/src/libscotch/context.c
@@ -70,7 +70,11 @@ static struct ContextValuesData_ {
 #else /* ((defined SCOTCH_DETERMINISTIC) || (defined COMMON_RANDOM_FIXED_SEED)) */
                               0
 #endif /* ((defined SCOTCH_DETERMINISTIC) || (defined COMMON_RANDOM_FIXED_SEED)) */
-  }, { } };
+  }
+#ifndef _MSC_VER
+  , { }
+#endif
+  };
 
 /***********************************/
 /*                                 */
@@ -89,6 +93,6 @@ contextOptionsInit (
 Context * const             contptr)
 {
   return (contextValuesInit (contptr, &contextvaluesdat, sizeof (contextvaluesdat),
-                             CONTEXTOPTIONNUMNBR, (void *) &contextvaluesdat.vinttab - (void *) &contextvaluesdat,
-                             CONTEXTOPTIONDBLNBR, (void *) &contextvaluesdat.vdbltab - (void *) &contextvaluesdat));
+                             CONTEXTOPTIONNUMNBR, (char *) &contextvaluesdat.vinttab - (char *) &contextvaluesdat,
+                             CONTEXTOPTIONDBLNBR, (char *) &contextvaluesdat.vdbltab - (char *) &contextvaluesdat));
 }
diff --git a/src/libscotch/parser_ll.l b/src/libscotch/parser_ll.l
index 6a795aad6..582f5e201 100644
--- a/src/libscotch/parser_ll.l
+++ b/src/libscotch/parser_ll.l
@@ -85,6 +85,10 @@
 %option noyywrap
 %option reentrant
 
+/* To support build on Windows */
+%option nounistd
+
+
 IDENT                       [A-Za-z][0-9A-Za-z]*
 INTEGER                     [0-9]+
 FLOAT                       [0-9]+(\.[0-9]+)?([Ee][-+]?[0-9]+)?
diff --git a/src/libscotch/parser_yy.y b/src/libscotch/parser_yy.y
index b287da4ca..bbc10b3ef 100644
--- a/src/libscotch/parser_yy.y
+++ b/src/libscotch/parser_yy.y
@@ -81,6 +81,9 @@ typedef void * YY_BUFFER_STATE;                   /* The same; Flex and Bison de
 **  The defines and includes (bis).
 */
 
+#ifdef _MSC_VER
+#define YY_NO_UNISTD_H
+#endif
 #include "parser.h"
 #include "parser_yy.h"
 #include "parser_ly.h"
diff --git a/src/scotch/CMakeLists.txt b/src/scotch/CMakeLists.txt
index 3974f4fce..b9149b931 100644
--- a/src/scotch/CMakeLists.txt
+++ b/src/scotch/CMakeLists.txt
@@ -67,10 +67,15 @@ function(add_scotch_exe)
   add_dependencies(${file_we} scotch_h)
   target_include_directories(${file_we} PRIVATE ${GENERATED_INCLUDE_DIR})
   target_compile_definitions(${file_we} PUBLIC "SCOTCH_CODENAME=\"${SCOTCH_CODENAME}\"")
-  if(Threads_FOUND)
-    target_compile_definitions(${file_we} PUBLIC SCOTCH_PTHREAD COMMON_PTHREAD)
-    target_link_libraries(${file_we} PUBLIC Threads::Threads)
-  endif(Threads_FOUND)
+  
+  if(USE_PTHREAD)
+      target_compile_definitions(${file_we} PUBLIC COMMON_PTHREAD SCOTCH_PTHREAD)
+      if(NOT WIN32)
+        target_link_libraries(${file_we} PUBLIC Threads::Threads)
+      else()
+        target_link_libraries(${file_we} PUBLIC PThreads4W::PThreads4W)
+      endif()
+  endif(USE_PTHREAD)
   target_link_libraries(${file_we} PUBLIC scotch scotcherrexit)
 endfunction(add_scotch_exe)
 
@@ -110,8 +115,9 @@ endforeach()
 
 # Targets which need special source lists
 add_scotch_exe(gout gout_c.c gout_o.c)
-target_link_libraries(gout PRIVATE m)
-
+if(NOT WIN32)
+    target_link_libraries(gout PRIVATE m)
+endif()
 # gpart is a special target (same source as gmap)
 add_scotch_exe(gpart gmap.c gmap.h)
 target_compile_definitions(gpart PRIVATE SCOTCH_COMPILE_PART)
@@ -142,10 +148,14 @@ if(BUILD_PTSCOTCH)
       ${GENERATED_INCLUDE_DIR}/ptscotch.h)
     add_dependencies(${file_we} ptscotch_h)
     target_compile_definitions(${file_we} PUBLIC "SCOTCH_CODENAME=\"${SCOTCH_CODENAME}\"")
-    if(Threads_FOUND)
-      target_compile_definitions(${file_we} PUBLIC SCOTCH_PTHREAD COMMON_PTHREAD)
-      target_link_libraries(${file_we} PUBLIC Threads::Threads)
-    endif(Threads_FOUND)
+    if(USE_PTHREAD)
+      target_compile_definitions(${file_we} PUBLIC COMMON_PTHREAD SCOTCH_PTHREAD)
+      if(NOT WIN32)
+        target_link_libraries(${file_we} PUBLIC Threads::Threads)
+      else()
+        target_link_libraries(${file_we} PUBLIC PThreads4W::PThreads4W)
+      endif()
+    endif(USE_PTHREAD)
     target_include_directories(${file_we} PRIVATE ${GENERATED_INCLUDE_DIR})
     target_link_libraries(${file_we} PUBLIC scotch ptscotch ptscotcherrexit)
   endfunction(add_ptscotch_exe)