build: finish cross-platform release tooling

CMakeLists.txt

@@ -172,9 +172,12 @@ endif()
 if(WIN32)
   # MinGW has no <regex.h>: musl's TRE engine, UTF-8 aware (vendor/tre-regex)
   include_directories(vendor/tre-regex)
-  list(APPEND CST_CORE_SOURCES
+  set(_CST_TRE_SOURCES
     vendor/tre-regex/regcomp.c vendor/tre-regex/regexec.c
     vendor/tre-regex/regerror.c vendor/tre-regex/tre-mem.c)
+  list(APPEND CST_CORE_SOURCES ${_CST_TRE_SOURCES})
+  # Upstream code, kept as is: CST_WIN_CFLAGS=-Werror must not apply to it.
+  set_source_files_properties(${_CST_TRE_SOURCES} PROPERTIES COMPILE_OPTIONS "-w")
 endif()
 
 set(CST_SOURCES ${CST_CORE_SOURCES} src/main.c)
@@ -307,7 +310,7 @@ foreach(t ${_CST_SMALL_TESTS})
   target_include_directories(${t} PRIVATE include "${CJSON_DIR}")
   target_compile_definitions(${t} PRIVATE _GNU_SOURCE)
   if(NOT WIN32)
-    target_link_libraries(${t} PRIVATE m)
+    target_link_libraries(${t} PRIVATE m Threads::Threads)
   endif()
   cst_win_exe(${t})
   add_test(NAME ${t} COMMAND ${t} WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}")