vcpkg/ports/scotch/fix-build.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ce3c5ba..b05667f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,7 +42,7 @@
 ############################################################
 
 cmake_minimum_required(VERSION 3.10)
-project(SCOTCH LANGUAGES C Fortran)
+project(SCOTCH LANGUAGES 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 1c05a82..fe7c106 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -105,9 +105,12 @@ 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()
   if(CMAKE_USE_WIN32_THREADS_INIT)
     add_definitions(-DCOMMON_THREAD_WIN32)
@@ -116,6 +119,12 @@ if(THREADS)
   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
diff --git a/src/libscotch/CMakeLists.txt b/src/libscotch/CMakeLists.txt
index f314d3a..27e466f 100644
--- a/src/libscotch/CMakeLists.txt
+++ b/src/libscotch/CMakeLists.txt
@@ -509,6 +509,22 @@ 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_LONG}
@@ -551,10 +567,14 @@ if(LIBLZMA_FOUND)
 endif()
 
 # Add thread library
-if(Threads_FOUND)
-  target_compile_definitions(scotch PRIVATE COMMON_PTHREAD SCOTCH_PTHREAD)
-  target_link_libraries(scotch PRIVATE Threads::Threads ${THREADS_PTHREADS_WIN32_LIBRARY})
-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)
@@ -567,25 +587,7 @@ if(CMAKE_BUILD_TYPE STREQUAL Debug)
   target_compile_definitions(scotch PRIVATE SCOTCH_DEBUG_LIBRARY1)
 endif()
 
-add_library(scotcherr library_error.c)
-set_target_properties(scotcherr PROPERTIES VERSION ${SCOTCH_VERSION_LONG}
-  SOVERSION ${SCOTCH_VERSION}.${SCOTCH_RELEASE})
-target_include_directories(scotcherr PUBLIC
-  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
-  $<BUILD_INTERFACE:${GENERATED_INCLUDE_DIR}>
-  $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
-
-add_dependencies(scotcherr scotch_h)
-
-add_library(scotcherrexit library_error_exit.c)
-set_target_properties(scotcherrexit PROPERTIES VERSION ${SCOTCH_VERSION_LONG}
-  SOVERSION ${SCOTCH_VERSION}.${SCOTCH_RELEASE})
-target_include_directories(scotcherrexit PUBLIC
-  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
-  $<BUILD_INTERFACE:${GENERATED_INCLUDE_DIR}>
-  $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
-
-add_dependencies(scotcherrexit scotch_h)
+target_link_libraries(scotch PRIVATE scotcherr)
 
 #################
 #  libPTScotch  #
@@ -786,10 +788,14 @@ if(BUILD_PTSCOTCH)
     set_target_properties(ptscotch PROPERTIES LINK_FLAGS "-undefined dynamic_lookup")
   endif(APPLE)
 
-  if(Threads_FOUND)
-    target_compile_definitions(ptscotch PRIVATE SCOTCH_PTHREAD COMMON_PTHREAD)
-    target_link_libraries(ptscotch PRIVATE Threads::Threads ${THREADS_PTHREADS_WIN32_LIBRARY})
-  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)
   set_target_properties(ptscotcherr PROPERTIES VERSION ${SCOTCH_VERSION_LONG}
diff --git a/src/libscotch/common_file_compress.c b/src/libscotch/common_file_compress.c
index 5255cdc..5f60dc8 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 6e80222..3048d90 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 a8d3284..2e9ae28 100644
--- a/src/libscotch/common_thread.h
+++ b/src/libscotch/common_thread.h
@@ -82,6 +82,8 @@ struct ThreadContext_ {
     int                         dummval;          /*+ Dummy value if no affinity enabled  +*/
 #ifdef COMMON_PTHREAD_AFFINITY_LINUX
     cpu_set_t                   cpusdat;          /*+ Original thread mask of main thread +*/
+#else
+    void*                       dummy;
 #endif /* COMMON_PTHREAD_AFFINITY_LINUX */
   }                             savedat;          /*+ Save area for affinity mask         +*/
 #endif /* COMMON_PTHREAD */
diff --git a/src/libscotch/context.c b/src/libscotch/context.c
index fbd8cbc..95e050a 100644
--- a/src/libscotch/context.c
+++ b/src/libscotch/context.c
@@ -70,8 +70,11 @@ static struct ContextValuesData_ {
 #else /* ((defined SCOTCH_DETERMINISTIC) || (defined COMMON_RANDOM_FIXED_SEED)) */
                               0
 #endif /* ((defined SCOTCH_DETERMINISTIC) || (defined COMMON_RANDOM_FIXED_SEED)) */
-  }, { -1.0 } };                                  /* Temporary hack: dummy value since ISO C does not accept zero-sized arrays */
-
+  }
+#ifndef _MSC_VER
+  , { }
+#endif
+  };
 /***********************************/
 /*                                 */
 /* These routines handle contexts. */
@@ -89,6 +92,6 @@ contextOptionsInit (
 Context * const             contptr)
 {
   return (contextValuesInit (contptr, &contextvaluesdat, sizeof (contextvaluesdat),
-                             CONTEXTOPTIONNUMNBR, (byte *) &contextvaluesdat.vinttab - (byte *) &contextvaluesdat,
-                             CONTEXTOPTIONDBLNBR, (byte *) &contextvaluesdat.vdbltab - (byte *) &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 d655669..c535e2e 100644
--- a/src/libscotch/parser_ll.l
+++ b/src/libscotch/parser_ll.l
@@ -95,6 +95,10 @@
 %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 2350980..77faadd 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 d706637..79e2be1 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 ${THREADS_PTHREADS_WIN32_LIBRARY})
-  endif(Threads_FOUND)
+
+  if(USE_PTHREAD)
+      target_compile_definitions(${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)
 
@@ -144,10 +149,14 @@ 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 ${THREADS_PTHREADS_WIN32_LIBRARY})
-    endif(Threads_FOUND)
+    if(USE_PTHREAD)
+      target_compile_definitions(${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)