From b34143f8a19040a457d399a22f0bde53ac327ff1 Mon Sep 17 00:00:00 2001 From: Yuhang Zhao <2546789017@qq.com> Date: Tue, 11 Dec 2018 00:52:36 +0800 Subject: Fix clang LTCG config on Windows To enable LTCG, clang-cl.exe need "-flto" instead of "-GL". But if you enabled LTO, the lib tool will have to change to "llvm-lib.exe" and the link tool also need to change to "lld-link.exe", because msvc linker will see these lib files as corrupted files. Leave QMAKE_LFLAGS_LTCG empty because lld-link doesn't need any additional parameters. Fixes: QTBUG-72402 Change-Id: Ia34d98bd1ad919d542ea3eac83944bf8c40ce0cd Reviewed-by: Thiago Macieira Reviewed-by: Friedemann Kleint Reviewed-by: Oswald Buddenhagen --- mkspecs/win32-clang-msvc/qmake.conf | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'mkspecs/win32-clang-msvc/qmake.conf') diff --git a/mkspecs/win32-clang-msvc/qmake.conf b/mkspecs/win32-clang-msvc/qmake.conf index ba9704e069..027f93ca6e 100644 --- a/mkspecs/win32-clang-msvc/qmake.conf +++ b/mkspecs/win32-clang-msvc/qmake.conf @@ -15,6 +15,14 @@ QMAKE_CFLAGS += -Wno-microsoft-enum-value QMAKE_CXXFLAGS += -Wno-microsoft-enum-value +QMAKE_LINK = lld-link +QMAKE_LIB = llvm-lib /NOLOGO + +QMAKE_CFLAGS_LTCG = -flto +QMAKE_CXXFLAGS_LTCG = $$QMAKE_CFLAGS_LTCG +# Leave QMAKE_LFLAGS_LTCG empty because lld-link doesn't need any additional parameters +QMAKE_LFLAGS_LTCG = + # Precompiled headers are not supported yet by clang CONFIG -= precompile_header -- cgit v1.2.3