azalea/kotlin-fork
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Replace some libstdc++ functions by simpler implementations

Browse Source 
This helps to avoid linking large libstdc++ parts,
thus reducing the binary size.
This commit is contained in:
Svyatoslav Scherbina
2018-01-15 13:48:58 +03:00
committed by SvyatoslavScherbina
parent 1aa2e26344
commit 45cd41ce81
2 changed files with 48 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
backend.native/konan.properties
+12 -5
View File
@@ -141,7 +141,8 @@ llvmLtoOptFlags.linux = -O3 -function-sections
llvmLtoNooptFlags.linux = -O1
llvmLtoDynamicFlags.linux = -relocation-model=pic
llvmLlcFlags.linux = -march=x86-64
linkerKonanFlags.linux = -Bstatic -lstdc++ -Bdynamic -ldl -lm -lpthread
linkerKonanFlags.linux = -Bstatic -lstdc++ -Bdynamic -ldl -lm -lpthread \
--defsym __cxa_demangle=Konan_cxa_demangle
linkerOptimizationFlags.linux = --gc-sections
linkerNoDebugFlags.linux = -S
linkerDynamicFlags.linux = -shared
@@ -172,7 +173,8 @@ linkerOptimizationFlags.raspberrypi = --gc-sections
targetSysRoot.raspberrypi = target-sysroot-1-raspberrypi
# We could reuse host toolchain here.
libffiDir.raspberrypi = libffi-3.2.1-2-raspberrypi
linkerKonanFlags.raspberrypi = -Bstatic -lstdc++ -Bdynamic -ldl -lm -lpthread
linkerKonanFlags.raspberrypi = -Bstatic -lstdc++ -Bdynamic -ldl -lm -lpthread \
--defsym __cxa_demangle=Konan_cxa_demangle
# targetSysroot-relative.
libGcc.raspberrypi = lib/gcc/arm-linux-gnueabihf/4.8.3
llvmLtoFlags.raspberrypi = -float-abi=hard -mcpu=arm1136jf-s
@@ -201,7 +203,8 @@ linkerDynamicFlags.linux_mips32 = -shared
targetSysRoot.linux_mips32 = target-sysroot-2-mips
# We could reuse host toolchain here.
libffiDir.linux_mips32 = libffi-3.2.1-2-linux-mips
linkerKonanFlags.linux_mips32 = -Bstatic -lstdc++ -Bdynamic -ldl -lm -lpthread
linkerKonanFlags.linux_mips32 = -Bstatic -lstdc++ -Bdynamic -ldl -lm -lpthread \
--defsym __cxa_demangle=Konan_cxa_demangle
# targetSysroot-relative.
libGcc.linux_mips32 = lib/gcc/mips-unknown-linux-gnu/4.9.4
llvmLtoFlags.linux_mips32 =
@@ -227,7 +230,8 @@ linkerDynamicFlags.linux_mipsel32 = -shared
targetSysRoot.linux_mipsel32 = target-sysroot-2-mipsel
# We could reuse host toolchain here.
libffiDir.linux_mipsel32 = libffi-3.2.1-2-linux-mipsel
linkerKonanFlags.linux_mipsel32 = -Bstatic -lstdc++ -Bdynamic -ldl -lm -lpthread
linkerKonanFlags.linux_mipsel32 = -Bstatic -lstdc++ -Bdynamic -ldl -lm -lpthread \
--defsym __cxa_demangle=Konan_cxa_demangle
# targetSysroot-relative.
libGcc.linux_mipsel32 = lib/gcc/mipsel-unknown-linux-gnu/4.9.4
llvmLtoFlags.linux_mipsel32 =
@@ -298,7 +302,10 @@ llvmLtoOptFlags.mingw = -O3 -function-sections
llvmLtoNooptFlags.mingw = -O1
linkerNoDebugFlags.mingw = -Wl,-S
linkerDynamicFlags.mingw = -shared
linkerKonanFlags.mingw =-static-libgcc -static-libstdc++ -Xclang -flto-visibility-public-std -Wl,-Bstatic,--whole-archive -lwinpthread -Wl,--no-whole-archive,-Bdynamic
linkerKonanFlags.mingw =-static-libgcc -static-libstdc++ \
-Xclang -flto-visibility-public-std \
-Wl,-Bstatic,--whole-archive -lwinpthread -Wl,--no-whole-archive,-Bdynamic \
-Wl,--defsym,__cxa_demangle=Konan_cxa_demangle
linkerOptimizationFlags.mingw = -Wl,--gc-sections
entrySelector.mingw = -Wl,--defsym,main=Konan_main
dependencies.mingw = \
runtime/src/main/cpp/StdCppStubs.cpp
+36
View File
@@ -0,0 +1,36 @@
/*
* Copyright 2010-2018 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "Assert.h"
#include "Porting.h"
#include "Common.h"
// This function replaces `__cxa_demangle` defined in GNU libstdc++
// by adding `--defsym` flag in `konan.properties`.
// This allows to avoid linking `__cxa_demangle` and its dependencies, thus reducing binary size.
RUNTIME_USED extern "C" char* Konan_cxa_demangle(
const char* __mangled_name, char* __output_buffer,
size_t* __length, int* __status
) {
*__status = -2; // __mangled_name is not a valid name under the C++ ABI mangling rules.
return nullptr;
}
namespace std {
void __throw_length_error(const char* __s __attribute__((unused))) {
RuntimeAssert(false, __s);
}
}