FindICU: Add support for static libraries on Windows

When compiling ICU statically on Windows with Visual Studio, the library
file names are prefixed with 's' [1].

[1] http://source.icu-project.org/repos/icu/trunk/icu4c/source/icudefs.mk.in
    `STATIC_PREFIX_WHEN_USED = s`

1 files changed, 19 insertions, 0 deletions

diff --git a/Modules/FindICU.cmake b/Modules/FindICU.cmake
index 3021167..aa531d5 100644
--- a/Modules/FindICU.cmake
+++ b/Modules/FindICU.cmake
@@ -172,6 +172,11 @@ function(_ICU_FIND)
   # Find all ICU libraries
   list(APPEND icu_library_suffixes "${_lib64}" "lib")
   set(ICU_REQUIRED_LIBS_FOUND ON)
+  set(static_prefix )
+  # static icu libraries compiled with MSVC have the prefix 's'
+  if(MSVC)
+    set(static_prefix "s")
+  endif()
   foreach(component ${ICU_FIND_COMPONENTS})
     string(TOUPPER "${component}" component_upcase)
     set(component_cache "ICU_${component_upcase}_LIBRARY")
@@ -206,6 +211,20 @@ function(_ICU_FIND)
       list(APPEND component_debug_libnames "icui18nd")
     endif()
 
+    if(static_prefix)
+      unset(static_component_libnames)
+      unset(static_component_debug_libnames)
+      foreach(component_libname ${component_libnames})
+        list(APPEND static_component_libnames
+          ${static_prefix}${component_libname})
+      endforeach()
+      foreach(component_libname ${component_debug_libnames})
+        list(APPEND static_component_debug_libnames
+          ${static_prefix}${component_libname})
+      endforeach()
+      list(APPEND component_libnames ${static_component_libnames})
+      list(APPEND component_debug_libnames ${static_component_debug_libnames})
+    endif()
     find_library("${component_cache_release}" ${component_libnames}
       HINTS ${icu_roots}
       PATH_SUFFIXES ${icu_library_suffixes}