set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
Please rectify the error in the file of config-file/CMakeLists.txt

你好！我在阅读cmake-practice的文档时，有关于编译出hello.so和hello.a的两个库的内容中，涉及到使用
SET_TARGET_PROPERTIES(hello PROPERTIES CLEAN_DIRECT_OUTPUT 1) SET_TARGET_PROPERTIES(hello_static PROPERTIES CLEAN_DIRECT_OUTPUT 1)
来防止库因同名而被删除的问题，但是个人（目前使用的cmake是3.10.2）经过一些尝试，在不使用以上语句的情况下也能成功编译出两个同名的库，有没有可能是版本更新后对此进行了优化导致的？或者请问我这样的尝试有什么不当之处吗？还请赐教

ADD_LIBRARY(hello SHARED ${LIBHELLO_SRC})

#[[
SET_TARGET_PROPERTIES(
    hello 
    PROPERTIES 
                CLEAN_DIRECT_OUTPUT 1            
)
]]

ADD_LIBRARY(hello_static STATIC ${LIBHELLO_SRC})

SET_TARGET_PROPERTIES(
    hello_static
    PROPERTIES 
                OUTPUT_NAME "hello"
)

图片

“三、初试cmake”章节中，第6页最后"CmakeLists.txt文件内容："，这里的CmakeLists.txt应该是CMakeLists.txt

Hi,
After hours of trying to build to hello-module project, found that according to the documentation for find_library you need to have PATHS rather than PATH to define additional paths for searching for the libraries.

A error in line 3 in hello-module/cmake/FindHELLO.cmake.
An s is missing after PATH.

/backup/t1/CMakeLists.txt

PROJECT (HELLO)
SET(SRC_LIST main.c)
MESSAGE(STATUS "This is BINARY dir " ${HELLO_BINARY_DIR})
MESSAGE(STATUS "This is SOURCE dir "${HELLO_SOURCE_DIR})
ADD_EXECUTABLE(hello SRC_LIST)

line 1: space after PROJECT is unnessary.
line 4: need no space before ${HELLO_SOURCE_DIR}, or there will be warning.
line 5: ${SRC_LIST} not SRC_LIST, or there will be an error.

Hi there,
When I try the first example in cmake-pratice, page 6, cmake complains cannot find source files.

-- This is BINARY dir
-- This is SOURCE dir
-- Configuring done
CMake Error at CMakeLists.txt:8 (add_executable):
  Cannot find source file:

    SRC_LIST

  Tried extensions .c .C .c++ .cc .cpp .cxx .m .M .mm .h .hh .h++ .hm .hpp
  .hxx .in .txx


CMake Error: CMake can not determine linker language for target: hello
CMake Error: Cannot determine link language for target "hello".

After I modified add_executable(hello SRC_LIST) to add_executable(hello ${SRC_LIST}), this issue had been solved. So here must be using variable name. Can you check and update it?

cmake version 3.5.1

感觉对unset的行为有点困惑。

An option that the user can select. Can accept condition to control when option is available for user.

Usage:

mxnet_option(<option_variable> "doc string" [IF ])

function(mxnet_option variable description value)
set(__value ${value})
set(__condition "")
set(__varname "__value")
foreach(arg ${ARGN})
if(arg STREQUAL "IF" OR arg STREQUAL "if")
set(__varname "__condition")
else()
list(APPEND ${__varname} ${arg})
endif()
endforeach()
unset(__varname) ==========>这里为什么要unset() unset之后这个变量不是不起作用？
if("${__condition}" STREQUAL "")
set(__condition 2 GREATER 1)
endif()

if(${__condition})
if("${__value}" MATCHES ";")
if(${__value})
option(${variable} "${description}" ON)
else()
option(${variable} "${description}" OFF)
endif()
elseif(DEFINED ${__value})
if(${__value})
option(${variable} "${description}" ON)
else()
option(${variable} "${description}" OFF)
endif()
else()
option(${variable} "${description}" ${__value})
endif()
else()
unset(${variable} CACHE)
endif()
endfunction()

This is more of a question than an actual issue. May I ask which edition of "Mastering CMake" you have in this repository?