0b69faf716
Fixes
make[3]: Entering directory '/home/buildroot/br7_freeswitch/output/build/audiofile-0.3.6/libaudiofile/modules'
/bin/bash ../../libtool --tag=CXX --mode=compile /home/buildroot/br7_freeswitch/output/host/usr/bin/i586-buildroot-linux-uclibc-g++ -DHAVE_CONFIG_H -I. -I../.. -I./.. -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -DNDEBUG -Wall -Wno-multichar -fvisibility=hidden -fno-rtti -fno-exceptions -fvisibility-inlines-hidden -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -c -o ALAC.lo ALAC.cpp
libtool: compile: /home/buildroot/br7_freeswitch/output/host/usr/bin/i586-buildroot-linux-uclibc-g++ -DHAVE_CONFIG_H -I. -I../.. -I./.. -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -DNDEBUG -Wall -Wno-multichar -fvisibility=hidden -fno-rtti -fno-exceptions -fvisibility-inlines-hidden -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -c ALAC.cpp -fPIC -DPIC -o .libs/ALAC.o
In file included from ALAC.cpp:29:0:
SimpleModule.h: In instantiation of 'const int signConverter<(FormatCode)0>::kMinSignedValue':
SimpleModule.h:130:52: required from 'signConverter<Format>::UnsignedType signConverter<Format>::signedToUnsigned::operator()(signConverter<Format>::SignedType) [with FormatCode Format = (FormatCode)0; signConverter<Format>::UnsignedType = unsigned char; signConverter<Format>::SignedType = signed char]'
/home/buildroot/br7_freeswitch/output/host/usr/i586-buildroot-linux-uclibc/include/c++/6.1.0/bits/stl_algo.h:4184:24: required from '_OIter std::transform(_IIter, _IIter, _OIter, _UnaryOperation) [with _IIter = const signed char*; _OIter = unsigned char*; _UnaryOperation = signConverter<(FormatCode)0>::signedToUnsigned]'
SimpleModule.h:104:16: required from 'void transform(const void*, void*, size_t) [with UnaryFunction = signConverter<(FormatCode)0>::signedToUnsigned; size_t = unsigned int]'
SimpleModule.h:176:62: required from 'static void ConvertSign::convertSignedToUnsigned(const void*, void*, size_t) [with FormatCode Format = (FormatCode)0; size_t = unsigned int]'
SimpleModule.h:183:51: required from here
SimpleModule.h:126:40: error: left operand of shift expression '(-1 << 7)' is negative [-fpermissive]
static const int kMinSignedValue = -1 << kScaleBits;
~~~^~~~~~~~~~~~~
To reproduce the build error use this defconfig:
BR2_GCC_VERSION_6_X=y
BR2_TOOLCHAIN_BUILDROOT_CXX=y
BR2_PACKAGE_AUDIOFILE=y
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
29 lines
1.2 KiB
Diff
29 lines
1.2 KiB
Diff
From 28cfdbbcb96a69087c3d21faf69b5eae7bcf6d69 Mon Sep 17 00:00:00 2001
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From: Hodorgasm <nsane457@gmail.com>
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Date: Wed, 11 May 2016 21:42:07 -0400
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Subject: [PATCH] Cast to unsigned while left bit-shifting
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GCC-6 now treats the left bitwise-shift of a negative integer as nonconformant so explicitly cast to an unsigned int while bit-shifting.
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Downloaded from upstream PR:
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https://github.com/mpruett/audiofile/pull/28
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Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
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---
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libaudiofile/modules/SimpleModule.h | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/libaudiofile/modules/SimpleModule.h b/libaudiofile/modules/SimpleModule.h
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index 03c6c69..4014fb2 100644
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--- a/libaudiofile/modules/SimpleModule.h
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+++ b/libaudiofile/modules/SimpleModule.h
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@@ -123,7 +123,7 @@ struct signConverter
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typedef typename IntTypes<Format>::UnsignedType UnsignedType;
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static const int kScaleBits = (Format + 1) * CHAR_BIT - 1;
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- static const int kMinSignedValue = -1 << kScaleBits;
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+ static const int kMinSignedValue = static_cast<signed>(static_cast<unsigned>(-1) << kScaleBits);;
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struct signedToUnsigned : public std::unary_function<SignedType, UnsignedType>
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{
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