[bug #29242] make fails to check timestamp of .h file and declares .o files are upto date

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?29242>

                 Summary: make fails to check timestamp of .h file and
declares .o files are upto date
                 Project: make
            Submitted by: None
            Submitted on: Wed 17 Mar 2010 07:13:09 AM UTC
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 3.81
        Operating System: POSIX-Based
           Fixed Release: None
           Triage Status: None

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Details:

Follow the  [STEP 1] to [STEP 5] to get the output.

[STEP 1]:Create and edit test.h file as shown below.

address@hidden example]#vi test.h

#include<iostream>

using namespace std;

void PRINT()
{
   cout<<"This is a test\n";

}
~
~
~

[STEP 2]: Create and edit test.cpp file as shown below.

address@hidden example]# vi test.cpp

#include "test.h"

int main(){

  PRINT();

  return 0;

}

~
~
[STEP 3]: run make command as below (without creating any Makefile)

address@hidden example]# make test.o
g++    -c -o test.o test.cpp
address@hidden example]#

[STEP 4]:Edit test.h file and change the output text as below.

address@hidden example]# vi test.h

#include<iostream>

using namespace std;

void PRINT()
{
   cout<<"test complete\n";
   
}
~
~
~
[STEP 5]: run make command again

address@hidden example]# make test.o
make: `test.o' is up to date.


Expected:
I was expecting the make tool to check the timestamp of both .h and .cpp and
recompile .cpp to create .o files.







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