From aee3cef1e003f8638d4ff21d3e76dbf1a462ad19 Mon Sep 17 00:00:00 2001 From: "Rick Farina (Zero_Chaos)" Date: Thu, 8 Oct 2026 13:16:09 -0400 Subject: [PATCH] client: fix Qt6 build and linker failures on GCC 15 toolchains Enforces Position Independent Code (-fPIC) across both the Makefile and CMake compilation paths for the host client software. Modern toolchains utilizing GCC 15+ and binutils 2.46+ strictly prohibit absolute copy relocations against shared objects flagged with protected visibility. Because Qt6 marks core data layouts (such as QImage vtables) as protected, compiling the client GUI without position independence breaks downstream compilation pipelines during linking: ld: obj/proxguiqt.moc.o: copy relocation against non-copyable protected symbol _ZTV6QImage@@Qt_6 Fixes the issue by explicitly appending -fPIC to the final PM3CFLAGS/ PM3CXXFLAGS variables inside client/Makefile and activating CMAKE_POSITION_INDEPENDENT_CODE within client/CMakeLists.txt. --- client/CMakeLists.txt | 2 ++ client/Makefile | 3 +++ 2 files changed, 5 insertions(+) diff --git a/client/CMakeLists.txt b/client/CMakeLists.txt index 6ccb4d98ac..1a845d81f6 100644 --- a/client/CMakeLists.txt +++ b/client/CMakeLists.txt @@ -605,6 +605,8 @@ if ((NOT SKIPQT EQUAL 1) AND (Qt5_FOUND OR Qt6_FOUND)) add_definitions("-DHAVE_GUI") if (Qt6_FOUND) + # Fix copy relocation issues with Qt6 protected visibility symbols on GCC 15 toolchains + set(CMAKE_POSITION_INDEPENDENT_CODE ON) set(ADDITIONAL_DIRS ${Qt6_INCLUDE_DIRS} ${ADDITIONAL_DIRS}) set(ADDITIONAL_LNK ${Qt6_LIBRARIES} ${ADDITIONAL_LNK}) else (Qt6_FOUND) diff --git a/client/Makefile b/client/Makefile index d1be39d84e..08ea8975c2 100644 --- a/client/Makefile +++ b/client/Makefile @@ -548,6 +548,9 @@ ifeq ($(QT_FOUND),1) # On OSX Qt6 is claiming for a C++11 compiler (gnu++14 works too, but if nothing it fails) PM3CXXFLAGS += -std=c++11 endif + # Fix GCC 15 + Qt6 linker error + PM3CFLAGS += -fPIC + PM3CXXFLAGS += -fPIC endif PM3CXXFLAGS += -DHAVE_SNPRINTF