跟著小白一起學鴻蒙之第一個OpenHarmony程序
作者：王石 胡瑞濤
今天我們來熟悉下OpenHarmony的編譯框架和如果自己開發一個HelloWord程序。
今天我們來熟悉下OpenHarmony的編譯框架和如果自己開發一個HelloWord程序。
簡介
OpenHarmony的編譯過程分析
graph LR
build.sh --> build.py --> hb --> gn
hb --> ninja
hb --> clang
![#跟著小白一起學鴻蒙# [二]第一個OpenHarmony程序-開源基礎軟件社區](https://dl-harmonyos.51cto.com/images/202208/c27aa128724805be7c060695f8c0d66b082e14.png?x-oss-process=image/resize,w_820,h_294 "#跟著小白一起學鴻蒙# [二]第一個OpenHarmony程序-開源基礎軟件社區")
名詞解釋
gn： generate ninja工具，在out目錄下生成ninja編譯文件*.ninja，文件位置在prebuilts/build-tools/linux-x86目錄里。
$ ./gn --help
Commands (type "gn help <command>" for more help):
analyze: Analyze which targets are affected by a list of files.
args: Display or configure arguments declared by the build.
check: Check header dependencies.
clean: Cleans the output directory.
desc: Show lots of insightful information about a target or config.
format: Format .gn files.
gen: Generate ninja files.
help: Does what you think.
ls: List matching targets.
meta: List target metadata collection results.
path: Find paths between two targets.
refs: Find stuff referencing a target or file.
……
ninja：構建工具，根據gn生成的*.ninja文件進行編譯構建，文件位置在prebuilts/build-tools/linux-x86目錄里。
./ninja --help
usage: ninja [options] [targets...]
if targets are unspecified, builds the 'default' target (see manual).
options:
--version print ninja version ("1.10.1")
-v, --verbose show all command lines while building
-C DIR change to DIR before doing anything else
-f FILE specify input build file [default=build.ninja]
-j N run N jobs in parallel (0 means infinity) [default=10 on this system]
-k N keep going until N jobs fail (0 means infinity) [default=1]
-l N do not start new jobs if the load average is greater than N
-n dry run (don't run commands but act like they succeeded)
-d MODE enable debugging (use '-d list' to list modes)
-t TOOL run a subtool (use '-t list' to list subtools)
terminates toplevel options; further flags are passed to the tool
-w FLAG adjust warnings (use '-w list' to list warnings)
clang：編譯器，同gcc兼容。
1、查看.gn并增加應用輸出
路徑為：oh32/third_party/libuv/BUILD.gn，找到如下位置增加。
//靜態庫
ohos_static_library("uv_static") {
deps = [ ":libuv_source" ]
public_configs = [ ":libuv_config" ]
subsystem_name = "thirdparty"
part_name = "libuv"
}
//動態庫
ohos_shared_library("uv") {
deps = [ ":libuv_source" ]
public_configs = [ ":libuv_config" ]
subsystem_name = "thirdparty"
part_name = "libuv"
if (is_ohos) {
output_extension = "so"
}
install_images = [
"system",
"updater",
]
}
//增加的新應用
ohos_executable("helloworld") {
sources = [ "helloword.c",]
}
2、增加helloworld.c
在oh32/third_party/libuv目錄下增加helloworld.c。
3、增加helloworld編譯生成的入口
在test/xts/acts/graphic/BUILD.gn里增加deps，如下：
import("http://build/ohos_var.gni")
group("graphic") {
testonly = true
if (is_standard_system) {
deps = [
"webGL:webGL_hap_test",
"windowStage:ActsWindowStageTest",
"windowstandard:window_hap_test",
"http://third_party/libuv:helloworld", #引入helloworld程序編譯
]
} else {
deps = [
"appaccount:appaccount_hap",
"osaccount:osaccount_hap",
]
}
}
源碼根目錄執行：
./build.sh --product-name rk3568
源碼根目錄執行：
./build.sh --product-name rk3568 --gn-args build_xts=true --build-target "acts" --gn-args is_standard_system=true
5、編譯完成后生成的第三方庫驗證程序helloworld使用流程
runtest庫文件會輸出helloworld，路徑為：out/rk3568/common/common。
~/oh32/out/rk3568/common/common$ ls
libc libimagePixelmap.so libnativerender.so libsqlite.z.so libteststring.so libusb_shared.z.so helloworld
使用方式如下：
1. 拷貝helloworld到板子上
hdc_std.exe file send helloworld /data/local/tmp
//2. 登錄板子，運行helloworld，如果第一次需要給權限
pc端：hdc_std.exe shell
板子：cd /data/local/tmp
板子：chmod +x helloworld
板子：./helloworld
結果：
#./helloworld
hello world!#
責任編輯：jianghua
來源：
鴻蒙社區
