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| author | Joerg Bornemann <joerg.bornemann@qt.io> | 2019-11-06 11:23:12 +0100 |
|---|---|---|
| committer | Joerg Bornemann <joerg.bornemann@qt.io> | 2019-11-08 17:00:17 +0100 |
| commit | 8ffb200153d1b1a8402c875c4961160efb149201 (patch) | |
| tree | c10b914ba68bc3072a4ce77a4e2d6eaa7ad21563 /mkspecs/features/ltcg.prf | |
| parent | 26f8adb1eefd1a8822413e036f2878b8cc1e7029 (diff) | |
Fix LTCG linker flags for macOS with separate debug info
The linker must not throw away the lto.o file. We now instruct the
linker to create a non-temporary lto.o, dependent on the target name.
In order to do that we introduce a new mkspec variable
QMAKE_LFLAGS_LTCG_SEPARATE_DEBUG_INFO. This variable can contain
single-$ variable references that get evaluated when loading ltcg.prf.
Fixes: QTBUG-72846
Change-Id: I0ea882628d63e5406ba0ee68c7435af597364b0f
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
Diffstat (limited to 'mkspecs/features/ltcg.prf')
| -rw-r--r-- | mkspecs/features/ltcg.prf | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mkspecs/features/ltcg.prf b/mkspecs/features/ltcg.prf index a94f6d0eeb..5fa6309016 100644 --- a/mkspecs/features/ltcg.prf +++ b/mkspecs/features/ltcg.prf @@ -1,6 +1,12 @@ static:no-static-ltcg { # Static library but no-static-ltcg enabled: skip LTCG } else: CONFIG(release, debug|release) { + separate_debug_info { + # Evaluate single-$ variable references that have no valid value at mkspec loading time + QMAKE_LFLAGS_LTCG_SEPARATE_DEBUG_INFO ~= s/\\$\\{/\$\$\{/ + eval(QMAKE_LFLAGS_LTCG += $$QMAKE_LFLAGS_LTCG_SEPARATE_DEBUG_INFO) + } + # 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 |