qt5base-lts/mkspecs/common/gcc-base-unix.conf
Thiago Macieira 72ba0079c3 Add a linker version script to Qt libraries
This linker script is only enabled for systems with GCC or GCC-like
compilers, though technically it should work on the BSDs too (will
enable after testing). For regular modules, this declares one ELF
version "Qt_5" and places all QtCore symbols inside, then it declares
unused ELF versions "Qt_5.x" for each older minor release. For modules
declared "internal_module", all symbols are placed in version
Qt_5_PRIVATE_API.

The big advantage of an ELF version is that, when we do Qt 6, both
versions of QtCore could be loaded in memory without conflicts and all
symbols would be resolved to the correct library. No module can talk to
both at the same time, but this avoids mistakes of loading them
indirectly by plugins.

The extra Qt_5.x versions will be used in the next commit.

Change-Id: I049a653beeb5454c9539ffff13e3fe6f050fdf31
Reviewed-by: Lisandro Damián Nicanor Pérez Meyer <perezmeyer@gmail.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
2015-09-13 18:54:17 +00:00

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#
# Base qmake configuration for GCC on *nix-systems
#
# Before making changes to this file, please read the comment in
# gcc-base.conf, to make sure the change goes in the right place.
#
# To verify that your change has the desired effect on the final configuration
# you can use the manual test in tests/manual/mkspecs.
#
include(gcc-base.conf)
QMAKE_LFLAGS_SHLIB += -shared
QMAKE_LFLAGS_PLUGIN += $$QMAKE_LFLAGS_SHLIB
QMAKE_LFLAGS_SONAME += -Wl,-soname,
QMAKE_LFLAGS_THREAD +=
QMAKE_LFLAGS_RPATH = -Wl,-rpath,
QMAKE_LFLAGS_RPATHLINK = -Wl,-rpath-link,
QMAKE_LFLAGS_NEW_DTAGS = -Wl,--enable-new-dtags
QMAKE_LFLAGS_USE_GOLD = -fuse-ld=gold
# -Bsymbolic-functions (ld) support
QMAKE_LFLAGS_BSYMBOLIC_FUNC = -Wl,-Bsymbolic-functions
QMAKE_LFLAGS_DYNAMIC_LIST = -Wl,--dynamic-list,
QMAKE_LFLAGS_VERSION_SCRIPT = -Wl,--version-script,