CONFIG(release, debug|release) { # We need fat object files when creating static libraries on some platforms # so the linker will know to load a particular object from the library # in the first place. On others, we have special ar and nm to create the symbol # tables so the linker will know better. For other compilers, we disable LTCG # for static libraries. msvc { # Nothing to do } else { !isEmpty(QMAKE_AR_LTCG): QMAKE_AR = $$QMAKE_AR_LTCG !isEmpty(QMAKE_NM_LTCG): QMAKE_NM = $$QMAKE_NM_LTCG equals(QMAKE_RANLIB_LTCG, true): QMAKE_RANLIB = else: !isEmpty(QMAKE_RANLIB_LTCG): QMAKE_RANLIB = $$QMAKE_RANLIB_LTCG static:isEmpty(QMAKE_AR_LTCG):isEmpty(QMAKE_RANLIB_LTCG) { # We don't know how to create symbol tables for static libs with this # compiler, so disable LTCG QMAKE_CFLAGS_LTCG = QMAKE_CXXFLAGS_LTCG = QMAKE_LFLAGS_LTCG = } } fat-lto { QMAKE_CFLAGS_LTCG += $$QMAKE_CFLAGS_LTCG_FATOBJECTS QMAKE_CXXFLAGS_LTCG += $$QMAKE_CXXFLAGS_LTCG_FATOBJECTS } load(link_ltcg) QMAKE_CFLAGS *= $$QMAKE_CFLAGS_LTCG QMAKE_CXXFLAGS *= $$QMAKE_CXXFLAGS_LTCG QMAKE_LFLAGS *= $$QMAKE_LFLAGS_LTCG }