feat: disable mingw useless exports

Author: dledda-r7

c/meterpreter/Makefile

@@ -1,6 +1,6 @@
 ID := $(shell id -u)
 DOCKER_CONTAINER=rapid7/msf-ubuntu-x64-meterpreter:latest
-COMMON_GEN=-Wno-dev -DUSE_STATIC_MSVC_RUNTIMES=ON
+COMMON_GEN=-Wno-dev -DCMAKE_SHARED_LINKER_FLAGS="-Wl,--strip-all,--build-id=none,--no-insert-timestamp,--exclude-all-symbols" -DCMAKE_MODULE_LINKER_FLAGS="-Wl,--strip-all,--build-id=none,--no-insert-timestamp,--exclude-all-symbols" -DUSE_STATIC_MSVC_RUNTIMES=ON
 COMMON_GEN_X86=-DCMAKE_TOOLCHAIN_FILE=../toolsets/i686-w64-mingw32.cmake -DBUILD_ARCH=Win32 ${COMMON_GEN}
 COMMON_GEN_X64=-DCMAKE_TOOLCHAIN_FILE=../toolsets/x86_64-w64-mingw32.cmake -DBUILD_ARCH=x64 ${COMMON_GEN}
 COMMON_BUILD=--config Release

c/meterpreter/workspace/metsrv/CMakeLists.txt

@@ -34,6 +34,10 @@ set_target_properties(${PROJECT_NAME} PROPERTIES OUTPUT_NAME ${PROJECT_NAME}.${T
 if(MSVC)
     set_target_properties(${PROJECT_NAME} PROPERTIES LINK_FLAGS "/DEF:\"${MOD_DEF_DIR}/metsrv.def\"")
     set_source_files_properties(${MOD_DEF_DIR}/metsrv.def PROPERTIES HEADER_FILE_ONLY TRUE)
+else()
+    # Prevent MinGW from auto-exporting symbols.
+    # With metsrv.def present this yields a single explicit export; without it, zero exports.
+    target_link_options(${PROJECT_NAME} PRIVATE "-Wl,--exclude-all-symbols")
 endif()
 
 set(LINK_LIBS advapi32 winhttp wininet crypt32)