CMakeLists.txt 语法

命令不区分大小写（参数区分大小写）

add_executable(demo main.cpp main.h main.rc)

用main.cpp源文件,main.h文件,main.rc文件构造可执行文件。至于如何使用这些文件, CMake比我们都清楚。

用 SET 设置变量

SET( MY_SOURCES main.cpp widget.cpp)

用 FOREACH 迭代

FOREACH(next_ITEM ${MY_SOURCES})
    MESSAGE(STATUS "next item: ${next_ITEM}")
ENDFOREACH(next_ITEM ${MY_SOURCES})

定义一个宏 hello

MACRO(hello MESSAGE)
    MESSAGE(${MESSAGE})
ENDMACRO()

使用

hello("Hello World")

string 操作

string(REGEX MATCH <regular_expression>
       <output variable> <input> [<input>...])
string(REGEX MATCHALL <regular_expression>
       <output variable> <input> [<input>...])
string(REGEX REPLACE <regular_expression>
       <replace_expression> <output variable>
       <input> [<input>...])
string(REPLACE <match_string>
       <replace_string> <output variable>
       <input> [<input>...])
string(CONCAT <output variable> [<input>...])
string(<MD5|SHA1|SHA224|SHA256|SHA384|SHA512>
       <output variable> <input>)
string(COMPARE EQUAL <string1> <string2> <output variable>)
string(COMPARE NOTEQUAL <string1> <string2> <output variable>)
string(COMPARE LESS <string1> <string2> <output variable>)
string(COMPARE GREATER <string1> <string2> <output variable>)
string(ASCII <number> [<number> ...] <output variable>)
string(CONFIGURE <string1> <output variable>
       [@ONLY] [ESCAPE_QUOTES])
string(TOUPPER <string1> <output variable>)
string(TOLOWER <string1> <output variable>)
string(LENGTH <string> <output variable>)
string(SUBSTRING <string> <begin> <length> <output variable>)
string(STRIP <string> <output variable>)
string(RANDOM [LENGTH <length>] [ALPHABET <alphabet>]
       [RANDOM_SEED <seed>] <output variable>)
string(FIND <string> <substring> <output variable> [REVERSE])
string(TIMESTAMP <output variable> [<format string>] [UTC])
string(MAKE_C_IDENTIFIER <input string> <output variable>)

Check if given C source compiles and links into an executable

CHECK_C_SOURCE_COMPILES(<code> <var> [FAIL_REGEX <fail-regex>])

<code>       - source code to try to compile, must define 'main'
<var>        - variable to store whether the source code compiled
               Will be created as an internal cache variable.
<fail-regex> - fail if test output matches this regex

The following variables may be set before calling this macro to modify the way the check is run:

CMAKE_REQUIRED_FLAGS = string of compile command line flags
CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
CMAKE_REQUIRED_INCLUDES = list of include directories
CMAKE_REQUIRED_LIBRARIES = list of libraries to link
CMAKE_REQUIRED_QUIET = execute quietly without messages