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Bug 1416183 - Build LZ4 as C instead of including it as C++. r=froydnj

Browse source 
Apply 63a7f34fee
to our copy of lz4.h to allow to flag the lz4 symbols as not exported.

--HG--
extra : rebase_source : d9aafb04a56c0ae3620e0c873f77d124386a41c4
This commit is contained in:
Mike Hommey 2017-11-15 12:51:01 +09:00
parent 26b5914e89
commit a1ac099614
3 changed files with 18 additions and 39 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

19
mfbt/Compression.cpp
View file

@ -12,27 +12,10 @@
// corecrt_memory.h. // corecrt_memory.h.
#include <string> #include <string>
// Because we wrap lz4.c in an anonymous namespace, all of its #includes #include "lz4.h"
// go in the anonymous namespace too. This would create conflicting
// declarations for intrinsic functions that are internally defined
// at top-level. Including intrin.h here prevents it from being included
// later within the anonymous namespace.
#ifdef _MSC_VER
#include <intrin.h>
#endif
using namespace mozilla::Compression; using namespace mozilla::Compression;
namespace {
extern "C" {
#include "lz4.c"
}
}/* anonymous namespace */
/* Our wrappers */ /* Our wrappers */
size_t size_t

22
mfbt/lz4.h
View file

@ -72,19 +72,23 @@ extern "C" {
/* /*
* LZ4_DLL_EXPORT : * LZ4_DLL_EXPORT :
* Enable exporting of functions when building a Windows DLL * Enable exporting of functions when building a Windows DLL
* LZ4LIB_API : * LZ4LIB_VISIBILITY :
* Control library symbols visibility. * Control library symbols visibility.
*/ */
#if defined(LZ4_DLL_EXPORT) && (LZ4_DLL_EXPORT==1) #ifndef LZ4LIB_VISIBILITY
# define LZ4LIB_API __declspec(dllexport) # if defined(__GNUC__) && (__GNUC__ >= 4)
#elif defined(LZ4_DLL_IMPORT) && (LZ4_DLL_IMPORT==1) # define LZ4LIB_VISIBILITY __attribute__ ((visibility ("default")))
# define LZ4LIB_API __declspec(dllimport) /* It isn't required but allows to generate better code, saving a function pointer load from the IAT and an indirect jump.*/
#elif defined(__GNUC__) && (__GNUC__ >= 4)
# define LZ4LIB_API __attribute__ ((__visibility__ ("default")))
# else # else
# define LZ4LIB_API # define LZ4LIB_VISIBILITY
# endif
#endif
#if defined(LZ4_DLL_EXPORT) && (LZ4_DLL_EXPORT==1)
# define LZ4LIB_API __declspec(dllexport) LZ4LIB_VISIBILITY
#elif defined(LZ4_DLL_IMPORT) && (LZ4_DLL_IMPORT==1)
# define LZ4LIB_API __declspec(dllimport) LZ4LIB_VISIBILITY /* It isn't required but allows to generate better code, saving a function pointer load from the IAT and an indirect jump.*/
#else
# define LZ4LIB_API LZ4LIB_VISIBILITY
#endif #endif
/*------ Version ------*/ /*------ Version ------*/
#define LZ4_VERSION_MAJOR 1 /* for breaking interface changes */ #define LZ4_VERSION_MAJOR 1 /* for breaking interface changes */

14
mfbt/moz.build
View file

@ -147,24 +147,16 @@ DEFINES['IMPL_MFBT'] = True
SOURCES += [ SOURCES += [
'Compression.cpp', 'Compression.cpp',
'decimal/Decimal.cpp', 'decimal/Decimal.cpp',
'lz4.c',
] ]
DisableStlWrapping() DisableStlWrapping()
# Suppress warnings in third-party LZ4 code.
# TODO: Remove these suppressions after bug 993267 is fixed.
if CONFIG['GNU_CXX']:
SOURCES['Compression.cpp'].flags += ['-Wno-unused-function']
CXXFLAGS += ['-Wno-error=shadow']
if CONFIG['CLANG_CXX']: if CONFIG['CLANG_CXX']:
# Suppress warnings from third-party V8 Decimal code. # Suppress warnings from third-party V8 Decimal code.
SOURCES['decimal/Decimal.cpp'].flags += ['-Wno-implicit-fallthrough'] SOURCES['decimal/Decimal.cpp'].flags += ['-Wno-implicit-fallthrough']
if CONFIG['_MSC_VER']:
# Error 4804 is "'>' : unsafe use of type 'bool' in operation"
SOURCES['Compression.cpp'].flags += ['-wd4804']
if CONFIG['MOZ_NEEDS_LIBATOMIC']: if CONFIG['MOZ_NEEDS_LIBATOMIC']:
OS_LIBS += ['atomic'] OS_LIBS += ['atomic']
DEFINES['LZ4LIB_VISIBILITY'] = ''