Revert portable march option

Author: nindanaoto

.github/workflows/test.yml

@@ -22,7 +22,7 @@ jobs:
         submodules: recursive
     - name: build
       run: |
-        cmake . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DENABLE_TEST=ON -DUSE_MARCH_NATIVE=OFF
+        cmake . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DENABLE_TEST=ON
         cd build
         ninja
     - name: test
@@ -46,7 +46,7 @@ jobs:
         submodules: recursive
     - name: build
       run: |
-        cmake . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DENABLE_TEST=ON -DUSE_MARCH_NATIVE=OFF
+        cmake . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DENABLE_TEST=ON
         cd build
         ninja
     - name: test
@@ -70,7 +70,7 @@ jobs:
         submodules: recursive
     - name: build
       run: |
-        cmake . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DENABLE_TEST=ON -DUSE_CONCRETE=ON -DUSE_MARCH_NATIVE=OFF
+        cmake . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DENABLE_TEST=ON -DUSE_CONCRETE=ON
         cd build
         ninja
     - name: test
@@ -94,7 +94,7 @@ jobs:
         submodules: recursive
     - name: build
       run: |
-        cmake . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DENABLE_TUTORIAL=ON -DUSE_MARCH_NATIVE=OFF
+        cmake . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DENABLE_TUTORIAL=ON
         cd build
         ninja
     - name: run tutorial
@@ -124,7 +124,7 @@ jobs:
         submodules: recursive
     - name: build
       run: |
-        /cmake-binary/bin/cmake . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_C_COMPILER=clang -DCMAKE_LINKER_TYPE=LLD -DENABLE_TEST=ON -DUSE_MARCH_NATIVE=OFF
+        /cmake-binary/bin/cmake . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_C_COMPILER=clang -DCMAKE_LINKER_TYPE=LLD -DENABLE_TEST=ON
         cd build
         ninja
     - name: test

CMakeLists.txt

@@ -2,15 +2,13 @@ cmake_minimum_required(VERSION 3.16)
 project(tfhe++ CXX C)
 set(CMAKE_CXX_STANDARD 20)
 option(DEBUG "Debug mode" OFF)
-option(USE_MARCH_NATIVE "Enable -march=native" ON)
-set(TFHEPP_BASE_CXX_FLAGS "-g -Wall -Wextra -pedantic -Wno-sign-compare")
-if(USE_MARCH_NATIVE)
-  string(APPEND TFHEPP_BASE_CXX_FLAGS " -march=native")
-endif()
 if(DEBUG)
-  set(CMAKE_CXX_FLAGS "${TFHEPP_BASE_CXX_FLAGS}")
+  set(CMAKE_CXX_FLAGS
+      "-march=native -g -Wall -Wextra -pedantic -Wno-sign-compare")
 else()
-  set(CMAKE_CXX_FLAGS "${TFHEPP_BASE_CXX_FLAGS} -O3 -funroll-loops")
+  set(CMAKE_CXX_FLAGS
+      "-march=native -O3 -g -funroll-loops -Wall -Wextra -pedantic -Wno-sign-compare"
+  )
   set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
 endif()
 

docs/Build.md

@@ -44,11 +44,6 @@ Build products:
 - `-DENABLE_SHARED=ON` — build `tfhe++` as a shared library.
 - `-DDEBUG=ON` — disable `-O3`, enable debug flags.
 
-Toolchain / CPU flags:
-
-- `-DUSE_MARCH_NATIVE=ON` (default) — enable `-march=native` for CPU‑tuned builds.
-- `-DUSE_MARCH_NATIVE=OFF` — build portable binaries (useful in CI or mixed CPUs).
-
 Randomness:
 
 - `-DUSE_BLAKE3=ON` (default) — BLAKE3‑XOF CSPRNG.