mdk5 + env环境下，怎么实现条件编译？debug release模式

发布于 2024-12-26 01:41:28 浏览：299 订阅该版

[tocm]

我使用keil5 + env, rtthread4.1.1 构建固件。
*（新手小白，前天才第一次接触env环境，还不太熟悉，rtthread studio试用了一下还不太习惯）。*

我将 template.uvprojx 默认的名称为rthread的Target改成了两个debug + release，如下图.
![Snipaste_2024-12-26_01-13-17.jpg](https://oss-club.rt-thread.org/uploads/20241226/30a902471f4aa12d8c39d09beed841e4.jpg)
####  目的是调试阶段使用debug，发布生产固件时则使用release进行编译。
> 
1. debug 阶段使用finsh + jlink rtt可以方便调试
2. release 则全部去掉，然后启用syswatch，以及-O2优化。因为芯片只有64k，bootloader分了20k, rom不够用必须的把finsh裁掉。

为了支持template.uvprojx中有debug + release两个Target，然后我还在debug中添加了_ _DEBUG_ _ 宏。还修改了
> rt-thread/tools/keil.py 的 MDK45Project 方法，如下：

```python
# The common part of making MDK4/5 project
def MDK45Project(tree, target, script):
    project_path = os.path.dirname(os.path.abspath(target))

root = tree.getroot()
    out = open(target, 'w')
    out.write('<?xml version="1.0" encoding="UTF-8" standalone="no" ?>\n')

CPPPATH = []
    CPPDEFINES = []
    LINKFLAGS = ''
    CFLAGS = ''
    ProjectFiles = []

# add group
    groups = tree.find('Targets/Target/Groups')
    if groups is None:
        groups = SubElement(tree.find('Targets/Target'), 'Groups')
    groups.clear() # clean old groups
    for group in script:
        group_tree = MDK4AddGroup(ProjectFiles, groups, group['name'], group['src'], project_path, group)

# get each include path
        if 'CPPPATH' in group and group['CPPPATH']:
            if CPPPATH:
                CPPPATH += group['CPPPATH']
            else:
                CPPPATH += group['CPPPATH']

# get each group's definitions
        if 'CPPDEFINES' in group and group['CPPDEFINES']:
            if CPPDEFINES:
                CPPDEFINES += group['CPPDEFINES']
            else:
                CPPDEFINES = group['CPPDEFINES']

# get each group's link flags
        if 'LINKFLAGS' in group and group['LINKFLAGS']:
            if LINKFLAGS:
                LINKFLAGS += ' ' + group['LINKFLAGS']
            else:
                LINKFLAGS += group['LINKFLAGS']

if 'LIBS' in group and group['LIBS']:
            for item in group['LIBS']:
                lib_path = ''
                for path_item in group['LIBPATH']:
                    full_path = os.path.join(path_item, item + '.lib')
                    if os.path.isfile(full_path): # has this library
                        lib_path = full_path
                        break

if lib_path != '':
                    if group_tree != None:
                        MDK4AddLibToGroup(ProjectFiles, group_tree, group['name'], lib_path, project_path)
                    else:
                        group_tree = MDK4AddGroupForFN(ProjectFiles, groups, group['name'], lib_path, project_path)

# write include path, definitions and link flags

# 这里需要遍历所有target, 并且把target预先定义的宏添加到末尾
    # 获取所有Targets下的所有Target节点
    targets = tree.findall("Targets/Target")
    if not targets:
        raise ValueError("No Targets found in the project file")

for target_node in targets:
        TargetOption = target_node.find("TargetOption")

IncludePath = TargetOption.find("TargetArmAds/Cads/VariousControls/IncludePath")
        IncludePath.text = ";".join(
            [_make_path_relative(project_path, os.path.normpath(i)) for i in CPPPATH]
        )

Define = TargetOption.find("TargetArmAds/Cads/VariousControls/Define")
        pretext = Define.text
        Define.text = ", ".join(set(CPPDEFINES))
        if pretext != "" and Define.text != "":
            Define.text = Define.text + ", " + pretext
        print(Define.text)

Misc = TargetOption.find("TargetArmAds/LDads/Misc")
        Misc.text = LINKFLAGS

xml_indent(root)
    out.write(etree.tostring(root, encoding='utf-8').decode())
    out.close()
```
修改后，这样可以把debug和release两个目标都复制到project工程，并且把template预先定义的宏也复制进行了。
所以，现在倒是支持debug + release两种目标了，现在我利用_ _DEBUG_ _宏来做条件编译，比如在rtconfig.h中定义如下：
```c
#ifdef _DEBUG_
#define RT_USING_FINSH
#endif
...
#ifndef _DEBUG_
#define PKG_USING_SYSWATCH
#endif
```
但rtconfig.h在 scons --target=mdk5 时又会被干掉，所以这个方法似乎行不通。又不太能够直接改代码吧，那样太麻烦了。

##### 因此，请教各位大牛，我应该怎么做才正确呢？ 还是说我一开始就不该这么弄😂？

才混迹论坛，没有积分😭