Fix cabextract CMake build on Windows

Author: val-ms

cabextract/CMakeLists.txt

@@ -209,21 +209,32 @@ add_executable(cabextract)
 target_sources(cabextract
     PRIVATE
         src/cabextract.c
+        getopt.c  getopt.h
+        getopt1.c
         md5.h md5.c)
+if(NOT WIN32)
+    target_include_directories(cabextract PRIVATE ${PROJECT_SOURCE_DIR})
+else()
+    target_include_directories(cabextract PRIVATE ${PROJECT_SOURCE_DIR} ${PROJECT_SOURCE_DIR}/win32)
+    target_sources(cabextract PRIVATE win32/dirent.h)
+    target_link_libraries(cabextract Shlwapi.lib)
+endif()
 target_include_directories(cabextract PRIVATE ${PROJECT_SOURCE_DIR})
 target_link_libraries(cabextract MSPack::mspack)
 install(TARGETS cabextract DESTINATION ${CMAKE_INSTALL_BINDIR})
 
-add_executable(cabinfo)
-target_sources(cabinfo
-    PRIVATE
-        src/cabinfo.c)
-target_include_directories(cabinfo PRIVATE ${PROJECT_SOURCE_DIR})
-target_link_libraries(cabinfo MSPack::mspack)
-
-enable_testing()
-add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND})
-add_subdirectory(test)
+if(NOT WIN32)
+    add_executable(cabinfo)
+    target_sources(cabinfo
+        PRIVATE
+            src/cabinfo.c)
+    target_include_directories(cabinfo PRIVATE ${PROJECT_SOURCE_DIR})
+    target_link_libraries(cabinfo MSPack::mspack)
+
+    enable_testing()
+    add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND})
+    add_subdirectory(test)
+endif()
 
 #
 # The Summary Info.

cabextract/README.md

@@ -160,3 +160,25 @@ cmake --build . --config Release
 ctest -C Release -V
 cmake --build . --config Release --target install
 ```
+
+#### Windows=specific build instructions
+
+A build using the bundled mspack files won't work on Windows for a couple of reasons. Instead, you can build cabextract on Windows by first building libmspack and then build cabextract using the ENABLE_EXTERNAL_MSPACK option.
+
+In the example below, we use build and link with the static libmspack library so we don't have to copy mspack.dll into the cabextract.exe directory.
+
+In the libmspack directory:
+```ps1
+mkdir build ; if($?) {cd build}
+cmake -DCMAKE_INSTALL_PREFIX:PATH=install .. -DENABLE_STATIC_LIB=ON
+cmake --build . --config Release --target install
+```
+
+Then in the cabextract directory something like this*:
+```ps1
+mkdir build ; if($?) {cd build}
+cmake .. -DENABLE_EXTERNAL_MSPACK=ON -DMSPack_INCLUDE_DIR="C:\Users\...\libmspack\build\install\include" -DMSPack_LIBRARY="C:\Users\...\libmspack\install\lib\mspack_static.lib"
+cmake --build . --config Debug
+.\Debug\cabextract.exe --help
+
+*Important*: set the `MSPack_INCLUDE_DIR` and `MSPack_LIBRARY` variables to your mspack `include` directory and `mspack_static.lib` file

cabextract/src/cabextract.c

@@ -31,7 +31,11 @@
 #include <ctype.h>
 #include <dirent.h>
 #include <errno.h>
+#ifndef _WIN32
 #include <fnmatch.h>
+#else
+#include <shlwapi.h>
+#endif
 #include <limits.h>
 #include <locale.h>
 #include <stdarg.h>
@@ -473,7 +477,11 @@ static int process_cabinet(char *basename) {
         int matched = 0;
         struct filter *f;
         for (f = args.filters; f; f = f->next) {
+#ifndef _WIN32
           if (!fnmatch(f->filter, &name[fname_offset], FNM_CASEFOLD)) {
+#else
+          if (TRUE == PathMatchSpecA(&name[fname_offset], f->filter)) {
+#endif
             matched = 1;
             break;
           }