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-rw-r--r--depends/packages/qt.mk2
-rw-r--r--depends/patches/qt/fast_fixed_dtoa_no_optimize.patch20
2 files changed, 22 insertions, 0 deletions
diff --git a/depends/packages/qt.mk b/depends/packages/qt.mk
index d46ca9ff9c..25f483808c 100644
--- a/depends/packages/qt.mk
+++ b/depends/packages/qt.mk
@@ -21,6 +21,7 @@ $(package)_patches += fix_limits_header.patch
$(package)_patches += use_android_ndk23.patch
$(package)_patches += rcc_hardcode_timestamp.patch
$(package)_patches += duplicate_lcqpafonts.patch
+$(package)_patches += fast_fixed_dtoa_no_optimize.patch
$(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
$(package)_qttranslations_sha256_hash=5d7869f670a135ad0986e266813b9dd5bbae2b09577338f9cdf8904d4af52db0
@@ -251,6 +252,7 @@ define $(package)_preprocess_cmds
patch -p1 -i $($(package)_patch_dir)/use_android_ndk23.patch && \
patch -p1 -i $($(package)_patch_dir)/rcc_hardcode_timestamp.patch && \
patch -p1 -i $($(package)_patch_dir)/duplicate_lcqpafonts.patch && \
+ patch -p1 -i $($(package)_patch_dir)/fast_fixed_dtoa_no_optimize.patch && \
mkdir -p qtbase/mkspecs/macx-clang-linux &&\
cp -f qtbase/mkspecs/macx-clang/qplatformdefs.h qtbase/mkspecs/macx-clang-linux/ &&\
cp -f $($(package)_patch_dir)/mac-qmake.conf qtbase/mkspecs/macx-clang-linux/qmake.conf && \
diff --git a/depends/patches/qt/fast_fixed_dtoa_no_optimize.patch b/depends/patches/qt/fast_fixed_dtoa_no_optimize.patch
new file mode 100644
index 0000000000..d4d6539f56
--- /dev/null
+++ b/depends/patches/qt/fast_fixed_dtoa_no_optimize.patch
@@ -0,0 +1,20 @@
+Modify the optimisation flags for FastFixedDtoa.
+This fixes a non-determinism issue in the asm produced for
+this function when cross-compiling on x86_64 and aarch64 for
+the arm-linux-gnueabihf HOST.
+
+--- a/qtbase/src/3rdparty/double-conversion/fixed-dtoa.h
++++ b/qtbase/src/3rdparty/double-conversion/fixed-dtoa.h
+@@ -48,9 +48,12 @@ namespace double_conversion {
+ //
+ // This method only works for some parameters. If it can't handle the input it
+ // returns false. The output is null-terminated when the function succeeds.
++#pragma GCC push_options
++#pragma GCC optimize ("-O1")
+ bool FastFixedDtoa(double v, int fractional_count,
+ Vector<char> buffer, int* length, int* decimal_point);
+
++#pragma GCC pop_options
+ } // namespace double_conversion
+
+ #endif // DOUBLE_CONVERSION_FIXED_DTOA_H_