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fix: change hello_world cmake compiler use -std=c++17 #116

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fix: change hello_world cmake compiler use -std=c++17 #116

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73db335
fix: change hello_world cmake compiler use -std=c++17 && argv add const
weedge Mar 21, 2024
7165806
change example helloworld gemma.cpp git tag
weedge Mar 21, 2024
9b7804c
change main use char** argv
weedge Mar 21, 2024
9c66eca
change main use char** argv
weedge Mar 21, 2024
2bdcf6f
remove const argv
weedge Mar 22, 2024
b9829cc
revert hello_world gemma git tag
weedge Mar 22, 2024
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5 changes: 4 additions & 1 deletion examples/hello_world/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,10 @@

cmake_minimum_required(VERSION 3.11)
project(hello_world)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
#set(CMAKE_CXX_FLAGS "-Wall -Wextra -fPIC -Wno-unused-parameter")

include(FetchContent)
FetchContent_Declare(highway GIT_REPOSITORY https://github.com/google/highway.git GIT_TAG da250571a45826b21eebbddc1e50d0c1137dee5f)
Expand All @@ -33,7 +36,7 @@ if (BUILD_MODE STREQUAL "local")
# Relative path to gemma.cpp from examples/hello_world/build/
FetchContent_Declare(gemma SOURCE_DIR ../../..)
else()
FetchContent_Declare(gemma GIT_REPOSITORY https://github.com/google/gemma.cpp.git GIT_TAG a9aa63fd2ea6b786ed0706d619588bfe2d43370e)
FetchContent_Declare(gemma GIT_REPOSITORY https://github.com/google/gemma.cpp.git GIT_TAG 73db33580b90f55042285b99139056c632f159bd)
endif()
FetchContent_MakeAvailable(gemma)

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2 changes: 1 addition & 1 deletion examples/hello_world/run.cc
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Expand Up @@ -37,7 +37,7 @@ std::vector<int> tokenize(
return tokens;
}

int main(int argc, char** argv) {
int main(int argc, const char** argv) {
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Why do we use const here? char** or char*[] is standard, see 3.6.1 in https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3337.pdf.

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@weedge weedge Mar 21, 2024 •
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argv from command params just read, so want use const char**, want use libgemma util/app.h this function gcpp::LoaderArgs loader(argc, argv) i want to cast const char** to char** , like this char** nonConstPtr = const_cast<char*>(constPtr);; but this command argv is immutable

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Why do we use const here? char** or char*[] is standard, see 3.6.1 in https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3337.pdf.

use main(int argc, char** argv) it's ok~

gcpp::LoaderArgs loader(argc, argv);

// Rough heuristic for the number of threads to use
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2 changes: 1 addition & 1 deletion run.cc
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Expand Up @@ -273,7 +273,7 @@ void Run(LoaderArgs& loader, InferenceArgs& inference, AppArgs& app) {

} // namespace gcpp

int main(int argc, char** argv) {
int main(int argc, const char** argv) {
{
PROFILER_ZONE("Startup.misc");

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6 changes: 3 additions & 3 deletions util/app.h
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Expand Up @@ -95,7 +95,7 @@ class AppArgs : public ArgsBase<AppArgs> {
}

public:
AppArgs(int argc, char* argv[]) {
AppArgs(int argc, const char* argv[]) {
InitAndParse(argc, argv);
ChooseNumThreads();
}
Expand Down Expand Up @@ -128,7 +128,7 @@ class AppArgs : public ArgsBase<AppArgs> {
};

struct LoaderArgs : public ArgsBase<LoaderArgs> {
LoaderArgs(int argc, char* argv[]) { InitAndParse(argc, argv); }
LoaderArgs(int argc, const char* argv[]) { InitAndParse(argc, argv); }

static std::string ToLower(const std::string& text) {
std::string result = text;
Expand Down Expand Up @@ -205,7 +205,7 @@ struct LoaderArgs : public ArgsBase<LoaderArgs> {
};

struct InferenceArgs : public ArgsBase<InferenceArgs> {
InferenceArgs(int argc, char* argv[]) { InitAndParse(argc, argv); }
InferenceArgs(int argc, const char* argv[]) { InitAndParse(argc, argv); }

size_t max_tokens;
size_t max_generated_tokens;
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10 changes: 5 additions & 5 deletions util/args.h
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Expand Up @@ -106,7 +106,7 @@ class ArgsBase {
// consider adding a hash-map to speed this up.
class ParseVisitor {
public:
ParseVisitor(int argc, char* argv[]) : argc_(argc), argv_(argv) {}
ParseVisitor(int argc, const char* argv[]) : argc_(argc), argv_(argv) {}

template <typename T>
void operator()(T& t, const char* name, const T& /*init*/,
Expand Down Expand Up @@ -167,7 +167,7 @@ class ArgsBase {
}

int argc_;
char** argv_;
const char** argv_;
}; // ParseVisitor

template <class Visitor>
Expand All @@ -192,19 +192,19 @@ class ArgsBase {
ForEach(visitor);
}

void Parse(int argc, char* argv[]) {
void Parse(int argc, const char* argv[]) {
ParseVisitor visitor(argc, argv);
ForEach(visitor);
}

// For convenience, enables single-line constructor.
void InitAndParse(int argc, char* argv[]) {
void InitAndParse(int argc, const char* argv[]) {
Init();
Parse(argc, argv);
}
};

static inline HWY_MAYBE_UNUSED bool HasHelp(int argc, char* argv[]) {
static inline HWY_MAYBE_UNUSED bool HasHelp(int argc, const char* argv[]) {
// TODO(austinvhuang): handle case insensitivity
if (argc == 1) {
// no arguments - print help
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