Question

我在运行构建时面临以下问题：

C:/Test.cpp: In member function '........':
C:/Test.cpp:291:50: error: 'round_one' may be used uninitialized in this function [-Werror=maybe-uninitialized]

我试图在我的整个源代码中使用字符串可能未初始化，但我找不到。我期待一些声明如下：

set_source_files_properties(ROOT_DIR/Test.cpp PROPERTIES COMPILE_FLAGS "-Wno-maybe-uninitialized -Wno-misleading-indentation" )

或

SET(GCC_COVERAGE_COMPILE_FLAGS "-Wno-maybe-uninitialized")
add_definitions(${GCC_COVERAGE_COMPILE_FLAGS})

但是我找不到 - 请告诉我如何在CMAKE实用程序中设置编译器标志？

Answer 1

警告-Wmaybe-uninitialized是已启用的警告之一由-Wall。 -Wall始终由熟练的程序员指定。警告将被转换 -Werror错误，因此标记-Wall -Werror将生成-Werror=maybe-uninitialized，根据您的诊断，如果检测到潜在的未初始化变量。

您很可能会在相关-Wall ... -Werror

中的指定编译器标记中找到CMakeLists.txt

Answer 2

一种方法是为项目设置添加编译器标志：

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其他方法是为目标设置编译器标志：

cmake_minimum_required(VERSION 2.8)

# Project
project(008-compile-flags-01)

# Add compile flag
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DHELLO_WORLD" CACHE STRING "Hello World Define." FORCE)

# Executable source files
set(executable_SOURCES src/main.cpp)

# Executable
add_executable(executable ${executable_SOURCES})

其他方式是使用 target_compile_features 。我以前没用过这个。请参阅：

编译器标记CMAKE脚本中的设置

2 个答案: