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merge bitcoin#25643: compile FastFixedDtoa with -O1 to fix cross-arch reproducibility for arm32

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Kittywhiskers Van Gogh 2023-06-27 18:51:37 +00:00 committed by PastaPastaPasta
parent f6869929d8
commit 30cd5ef2fa
2 changed files with 22 additions and 0 deletions
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2
depends/packages/qt.mk
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@ -16,6 +16,7 @@ $(package)_patches+= fix_limits_header.patch
$(package)_patches+= fix_montery_include.patch
$(package)_patches += glibc_compatibility.patch
$(package)_patches+= qtbase-moc-ignore-gcc-macro.patch
$(package)_patches += fast_fixed_dtoa_no_optimize.patch
$(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
$(package)_qttranslations_sha256_hash=577b0668a777eb2b451c61e8d026d79285371597ce9df06b6dee6c814164b7c3
@ -241,6 +242,7 @@ define $(package)_preprocess_cmds
patch -p1 -i $($(package)_patch_dir)/fix_montery_include.patch && \
patch -p1 -i $($(package)_patch_dir)/glibc_compatibility.patch && \
patch -p1 -i $($(package)_patch_dir)/qtbase-moc-ignore-gcc-macro.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 && \

20
depends/patches/qt/fast_fixed_dtoa_no_optimize.patch Normal file
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@ -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_