No rule to make target 'a'

I've figure out why my simulink model cause build error.

Error messege tell me that 'No rule to make target 'a'

___

version1.c: In function ‘version1_RRTPlanner_planPath.constprop’:

version1.c:3350:10: warning: ‘x_data’ may be used uninitialized in this function [-Wmaybe-uninitialized]

if (!x_data) {

^

version1.c:3334:13: note: ‘x_data’ was declared here

boolean_T x_data;

^~~~~~

version1.c:4288:14: warning: ‘parentId_data’ may be used uninitialized in this function [-Wmaybe-uninitialized]

if (qY > parentId_data) {

^

version1.c:4262:19: warning: ‘edgeId_data’ may be used uninitialized in this function [-Wmaybe-uninitialized]

edgeId_data = fmax(edgeId_data, 1.0);

~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

make: *** No rule to make target 'autonomouscodegen_dubins.cpp', needed by '../libversion1_linux64.a'. Stop.

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So what should I do for this problem?

Answer 1

[Shivani]

Hi @Solyeon Kwon,

The error "No rule to make target" is typically thrown by the make/gmake build automation tool because it can't find the instructions on how to create a particular file or target.

Based on the error log shared, it is my understanding that there are several compilation errors in the function named ‘version1_RRTPlanner_planPath.constpro’. I am assuming that this function is in the file ‘autonomouscodegen_dubins.cpp’ and the tool is unable to locate the file due to the compilation errors.

Please refer to the following troubleshooting steps to resolve the compilation errors received:

• The error being reported indicates that ‘x_data’ is not being initialized previously. From the error message it seems like the variable was only declared and not initialized
• Similarly, the variables ‘edgeId_data’ and ‘parentId_data’ are also not being initialized.

If the make error persists after resolving the compilation errors, then kindly refer to the following MATLAB Answer threads as they provide valuable insights to resolving this issue:

• https://www.mathworks.com/matlabcentral/answers/814790-why-do-i-get-the-build-error-no-rule-to-make-target
• https://www.mathworks.com/matlabcentral/answers/1748725-no-rule-to-make-target-error

I hope this helps!