diff options
Diffstat (limited to 'mkspecs/features/ltcg.prf')
| -rw-r--r-- | mkspecs/features/ltcg.prf | 38 |
1 files changed, 16 insertions, 22 deletions
diff --git a/mkspecs/features/ltcg.prf b/mkspecs/features/ltcg.prf index b0765a85c3..ccf0226272 100644 --- a/mkspecs/features/ltcg.prf +++ b/mkspecs/features/ltcg.prf @@ -1,38 +1,32 @@ 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. With GCC, we have -ffat-lto-objects. MSVC - # seems to work just fine. For other compilers, we disable LTCG + # 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: gcc { - !clang:!intel_icc { - static|fat-lto { - QMAKE_CFLAGS_LTCG += -ffat-lto-objects - QMAKE_CXXFLAGS_LTCG += -ffat-lto-objects - } else { - QMAKE_CFLAGS_LTCG += -fno-fat-lto-objects - QMAKE_CXXFLAGS_LTCG += -fno-fat-lto-objects - } - linux { - # Get the number of online processors, like _SC_NPROCESSORS_ONLN - isEmpty(QMAKE_NPROCESSORS_ONLN) { - QMAKE_NPROCESSORS_ONLN = $$system("grep -c '^processor' /proc/cpuinfo 2>/dev/null || echo 1") - cache(QMAKE_NPROCESSORS_ONLN, set stash) - } + } else { + !isEmpty(QMAKE_AR_LTCG): QMAKE_AR = $$QMAKE_AR_LTCG + !isEmpty(QMAKE_NM_LTCG): QMAKE_NM = $$QMAKE_NM_LTCG - # Override LTO number of jobs - QMAKE_LFLAGS_LTCG -= -flto - QMAKE_LFLAGS_LTCG += -flto=$$QMAKE_NPROCESSORS_ONLN - } - } else: static { + 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 |