<div>I use cmake version 2.8.3.<br></div><div><br></div><div>If I use CMakeLists from your previous reply, it avoids overwriting files when X=0.</div><div>I have attached the output of your script. </div><div><br></div><div>
It works for my CMakeLists as well now. What I did now is </div><div><font color="#888888"><br></font></div><div><font color="#333333">if(${GrammarSource}/test.g IS_NEWER_THAN ${PROJECT_BINARY_DIR}/test.g)</font></div><div>
<font color="#333333"> ADD_CUSTOM_TARGET(...)</font><font color="#333333"><br></font></div><div><font color="#333333"> ADD_CUSTOM_COMMAND(...)</font><font color="#333333"><br></font></div><div><font color="#333333"> </font></div>
<div><font color="#333333">i.e I am totally avoiding the process of rebuilding the test.g file and copying the generated files to build/parser </font></div><div><font color="#333333"><strong>IF</strong> test.g has not been modified.<br>
</font></div><div><font color="#888888"><br>
</font><br> Thank you very much</div><div>Ajay</div><div><br></div><div><div>PS: Could you set up your e-mail client so that it marks quoted<br>
text in some way? Currently, one can't distinguish between<br>
the lines you are writing and the lines written by others.<br><br></div><div>Sorry. I did not realize that. I use gmail and when I checked my sent emails,</div><div>quoted text appears to be clearly marked. Is the quoted text in this email marked properly.</div>
</div><br><div class="gmail_quote">On Sun, Mar 4, 2012 at 4:05 PM, Michael Hertling <span dir="ltr"><<a href="mailto:mhertling@online.de" target="_blank">mhertling@online.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>On 03/04/2012 08:02 PM, Ajay Panyala wrote:<br>
> The following project is a boiled-down version of yours but doesn't<br>
> need any programs except for CMake - that's what I actually meant<br>
> with "minimal but complete" as I don't have the org.antlr.Tool<br>
> Java program:<br>
><br>
> I am sorry. I was mainly trying to cleanup the big CMakeLists file<br>
> I had and removed about 10 different targets - all of which were<br>
> rebuilt because the 5 files (test*.*) were overwritten.<br>
><br>
> If you want to try running the test project on your system<br>
><br>
> test.g is at <a href="http://pastie.org/private/agzor3ibzoa5pom6q31qq" target="_blank">http://pastie.org/private/agzor3ibzoa5pom6q31qq</a><br>
><br>
> org.antlr.Tool is at <a href="http://www.antlr.org/download/antlr-3.4-complete.jar" target="_blank">www.antlr.org/download/antlr-3.4-complete.jar</a><br>
><br>
> After configuration, you can run the target by "make X=0" and check the<br>
> timestamps by "ls -l --full-time test.tokens parser src". Issuing "make<br>
> X=0" again reveals that the copied files aren't rewritten as it happens<br>
> after "make X=1". Thus, AFAICS, everything works as expected. Could you<br>
> check if the above-noted example also works on your system?<br>
><br>
> It does not work. The files are still overwritten.<br>
<br>
</div>Could you run the following shell script in a build tree configured<br>
with the CMakeLists.txt from my previous reply and post the output?<br>
<br>
# check.sh:<br>
make X=0 2>&1 > /dev/null<br>
echo "After make X=0 (1):"<br>
echo "-------------------"<br>
echo ""<br>
ls --full-time test.tokens src parser<br>
echo -ne "\n\n"<br>
sleep 3<br>
make X=0 2>&1 > /dev/null<br>
echo "After make X=0 (2):"<br>
echo "-------------------"<br>
echo ""<br>
ls --full-time test.tokens src parser<br>
echo -ne "\n\n"<br>
sleep 3<br>
make X=1 2>&1 > /dev/null<br>
echo "After make X=1:"<br>
echo "---------------"<br>
echo ""<br>
ls --full-time test.tokens src parser<br>
# End of check.sh<br>
<br>
BTW, which CMake version do you use?<br>
<br>
Regards,<br>
<font color="#888888"><br>
Michael<br>
</font><br>
PS: Could you set up your e-mail client so that it marks quoted<br>
text in some way? Currently, one can't distinguish between<br>
the lines you are writing and the lines written by others.<br>
<div><div><br>
> What exactly does not work with your example? You wrote:<br>
><br>
>>>> I have 4 cmake -E copy_if_different commands, one for each file.<br>
>>>> Only the last file is not copied (if similar). [...]<br>
><br>
> Does this mean that the last file out of four - in fact, your example<br>
> handles five files - is not copied *although* the source file and the<br>
> destination file are different, i.e. similar but not equal?<br>
><br>
> Yes the file test.tokens is not copied overwritten since they are<br>
> exactly (diff) similar files. This is the case with the other 4 files as<br>
> well,<br>
> but they are still copied over and rewritten.<br>
><br>
><br>
> You wrote further:<br>
><br>
>>>> [...] The others are copied<br>
>>>> even if they are the same.<br>
>>>><br>
>>>> I verfied that they are the same with a diff.<br>
><br>
> Does this mean that source files are copied *although* they are equal<br>
> to their respective destination file? How do you determine that they<br>
> have been copied? Do you check the timestamps? With --full-time?<br>
><br>
> Yes, I do check with ls -l --full-time. Except test.tokens, all the other<br>
> files<br>
> are copied over (rewritten) even though they are exactly the same (diff<br>
> same I mean).<br>
><br>
> This is what is confusing me about the behavior of copy_if_different.<br>
> that is why it works only with test.tokens and not others.<br>
><br>
> PS: Does org.antlr.Tool write to the source tree? If so: Don't do that.<br>
><br>
> Yes, it generates the files in the source dir itself (where test.g is<br>
> present)<br>
> I now modified CMakeLists to copy test.g to the project build folder and<br>
> run it there. The new CMakeLists is at<br>
><br>
> <a href="http://pastie.org/private/p1yi0l8so9cqimqlywfmhw" target="_blank">http://pastie.org/private/p1yi0l8so9cqimqlywfmhw</a><br>
><br>
><br>
> Thank You<br>
> Ajay<br>
><br>
> On Sun, Mar 4, 2012 at 12:52 AM, Michael Hertling <<a href="mailto:mhertling@online.de" target="_blank">mhertling@online.de</a>>wrote:<br>
><br>
>> On 03/04/2012 01:06 AM, Ajay Panyala wrote:<br>
>>> Please provide a minimal but complete example for this issue.<br>
>>><br>
>>> Please find it in the following link<br>
>>> <a href="http://pastie.org/private/pd13u33s9xpfihf2dbzc1q" target="_blank">http://pastie.org/private/pd13u33s9xpfihf2dbzc1q</a><br>
>><br>
>><br>
><br>
><br>
>> The following project is a boiled-down version of yours but doesn't<br>
>> need any programs except for CMake - that's what I actually meant<br>
>> with "minimal but complete" as I don't have the org.antlr.Tool<br>
>> Java program:<br>
>><br>
>> CMAKE_MINIMUM_REQUIRED(VERSION 2.8 FATAL_ERROR)<br>
>> PROJECT(P NONE)<br>
>> SET(CMAKE_VERBOSE_MAKEFILE ON)<br>
>><br>
>> SET(GrammarSource ${PROJECT_BINARY_DIR}/src)<br>
>> FILE(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/src)<br>
>><br>
>> ADD_CUSTOM_TARGET(GrammarBuild ALL<br>
>> COMMAND ${CMAKE_COMMAND} -E echo "\${X}"<br>
>> > ${GrammarSource}/testLexer.h<br>
>> COMMAND ${CMAKE_COMMAND} -E echo "\${X}"<br>
>> > ${GrammarSource}/testLexer.c<br>
>> COMMAND ${CMAKE_COMMAND} -E echo "\${X}"<br>
>> > ${GrammarSource}/testParser.h<br>
>> COMMAND ${CMAKE_COMMAND} -E echo "\${X}"<br>
>> > ${GrammarSource}/testParser.c<br>
>> COMMAND ${CMAKE_COMMAND} -E echo "\${X}"<br>
>> > ${PROJECT_BINARY_DIR}/test.tokens<br>
>> )<br>
>><br>
>> ADD_CUSTOM_COMMAND(TARGET GrammarBuild POST_BUILD<br>
>> COMMAND ${CMAKE_COMMAND} -E copy_if_different<br>
>> ${GrammarSource}/testLexer.h<br>
>> ${PROJECT_BINARY_DIR}/parser/testLexer.h<br>
>> COMMAND ${CMAKE_COMMAND} -E copy_if_different<br>
>> ${GrammarSource}/testLexer.c<br>
>> ${PROJECT_BINARY_DIR}/parser/testLexer.c<br>
>> COMMAND ${CMAKE_COMMAND} -E copy_if_different<br>
>> ${GrammarSource}/testParser.h<br>
>> ${PROJECT_BINARY_DIR}/parser/testParser.h<br>
>> COMMAND ${CMAKE_COMMAND} -E copy_if_different<br>
>> ${GrammarSource}/testParser.c<br>
>> ${PROJECT_BINARY_DIR}/parser/testParser.c<br>
>> COMMAND ${CMAKE_COMMAND} -E copy_if_different<br>
>> ${PROJECT_BINARY_DIR}/test.tokens<br>
>> ${PROJECT_BINARY_DIR}/parser/test.tokens<br>
>> )<br>
>><br>
>> After configuration, you can run the target by "make X=0" and check the<br>
>> timestamps by "ls -l --full-time test.tokens parser src". Issuing "make<br>
>> X=0" again reveals that the copied files aren't rewritten as it happens<br>
>> after "make X=1". Thus, AFAICS, everything works as expected. Could you<br>
>> check if the above-noted example also works on your system?<br>
>><br>
>> What exactly does not work with your example? You wrote:<br>
>><br>
>>>>> I have 4 cmake -E copy_if_different commands, one for each file.<br>
>>>>> Only the last file is not copied (if similar). [...]<br>
>><br>
>> Does this mean that the last file out of four - in fact, your example<br>
>> handles five files - is not copied *although* the source file and the<br>
>> destination file are different, i.e. similar but not equal?<br>
>><br>
>> You wrote further:<br>
>><br>
>>>>> [...] The others are copied<br>
>>>>> even if they are the same.<br>
>>>>><br>
>>>>> I verfied that they are the same with a diff.<br>
>><br>
>> Does this mean that source files are copied *although* they are equal<br>
>> to their respective destination file? How do you determine that they<br>
>> have been copied? Do you check the timestamps? With --full-time?<br>
>><br>
>> Regards,<br>
>><br>
>> Michael<br>
>><br>
>> PS: Does org.antlr.Tool write to the source tree? If so: Don't do that.<br>
>><br>
>>> On Sat, Mar 3, 2012 at 3:54 PM, Michael Hertling <<a href="mailto:mhertling@online.de" target="_blank">mhertling@online.de</a><br>
>>> wrote:<br>
>>><br>
>>>> On 03/04/2012 12:14 AM, Ajay Panyala wrote:<br>
>>>>> No, it wouldn't; check it out:<br>
>>>>><br>
>>>>> % touch a<br>
>>>>> % rm -f b<br>
>>>>> % ls b<br>
>>>>> ls: cannot access b: No such file or directory<br>
>>>>> % cmake -E copy_if_different a b<br>
>>>>> % ls b<br>
>>>>> b<br>
>>>>> % cksum a b<br>
>>>>> 4294967295 0 a<br>
>>>>> 4294967295 0 b<br>
>>>>><br>
>>>>> It works with one file, but I have 4 files that are generated.<br>
>>>>> I have 4 cmake -E copy_if_different commands, one for each file.<br>
>>>>> Only the last file is not copied (if similar). The others are copied<br>
>>>>> even if they are the same.<br>
>>>>><br>
>>>>> I verfied that they are the same with a diff.<br>
>>>>><br>
>>>>> Any idea what might be happening here ?<br>
>>>><br>
>>>> Please provide a minimal but complete example for this issue.<br>
>>>><br>
>>>> Regards,<br>
>>>><br>
>>>> Michael<br>
>>>><br>
>>>>> On Sat, Mar 3, 2012 at 2:47 PM, Michael Hertling <<a href="mailto:mhertling@online.de" target="_blank">mhertling@online.de</a><br>
>>>>> wrote:<br>
>>>>><br>
>>>>>> On 03/03/2012 10:36 PM, Ajay Panyala wrote:<br>
>>>>>>> Try "cmake -E copy_if_different ..."<br>
>>>>>>><br>
>>>>>>> cmake -E copy_if_different build/test1.c build/tests/test1.c<br>
>>>>>>><br>
>>>>>>> That would work when make is run atleast once.<br>
>>>>>>> When running make for the 1st time test1.c was never<br>
>>>>>>> copied to build/tests before. So I would be comparing a file with<br>
>>>>>>> another non-existant file and that would result in an error halting<br>
>>>>>>> the make process.<br>
>>>>>><br>
>>>>>> No, it wouldn't; check it out:<br>
>>>>>><br>
>>>>>> % touch a<br>
>>>>>> % rm -f b<br>
>>>>>> % ls b<br>
>>>>>> ls: cannot access b: No such file or directory<br>
>>>>>> % cmake -E copy_if_different a b<br>
>>>>>> % ls b<br>
>>>>>> b<br>
>>>>>> % cksum a b<br>
>>>>>> 4294967295 0 a<br>
>>>>>> 4294967295 0 b<br>
>>>>>><br>
>>>>>> Regards,<br>
>>>>>><br>
>>>>>> Michael<br>
>>>>>><br>
>>>>>>> On Sat, Mar 3, 2012 at 1:20 PM, Hendrik Sattler <<br>
>>>> <a href="mailto:post@hendrik-sattler.de" target="_blank">post@hendrik-sattler.de</a><br>
>>>>>>> wrote:<br>
>>>>>>><br>
>>>>>>>> Am Samstag, 3. März 2012, 21:41:49 schrieb Ajay Panyala:<br>
>>>>>>>>> I have a custom target which runs a command to generate<br>
>>>>>>>>> a C source file say test1.c<br>
>>>>>>>>><br>
>>>>>>>>> ADD_CUSTOM_TARGET(TestGen ALL<br>
>>>>>>>>> COMMAND genExec ${PROJECT_SOURCE_DIR}/Main.java<br>
>>>>>>>>> DEPENDS ${PROJECT_SOURCE_DIR}/Main.java<br>
>>>>>>>>> )<br>
>>>>>>>>><br>
>>>>>>>>> And I have a custom command that moves the generated *test1.c *<br>
>>>>>>>>> to a new directory inside the build directory.<br>
>>>>>>>>><br>
>>>>>>>>> ADD_CUSTOM_COMMAND(<br>
>>>>>>>>> TARGET TestGen<br>
>>>>>>>>> POST_BUILD<br>
>>>>>>>>> COMMAND mv<br>
>>>>>>>>> ARGS ${PROJECT_BINARY_DIR}/test1.c ${PROJECT_BINARY_DIR}/tests/<br>
>>>>>>>>> )<br>
>>>>>>>>><br>
>>>>>>>>> Each time I run make, the custom target is run (since custom<br>
>> targets<br>
>>>>>> are<br>
>>>>>>>>> always<br>
>>>>>>>>> out-of-date). But I want to avoid moving the new test1.c generated<br>
>>>> each<br>
>>>>>>>>> time if build/test1.c is the same as build/tests/test1.c since<br>
>> there<br>
>>>>>> are<br>
>>>>>>>>> other targets<br>
>>>>>>>>> like add_executable and add_library later in the CMakelists file<br>
>> that<br>
>>>>>> are<br>
>>>>>>>>> re-built<br>
>>>>>>>>> each time since they depend on test1.c<br>
>>>>>>>><br>
>>>>>>>> Try "cmake -E copy_if_different ..."<br>
>>>>>>>><br>
>>>>>>>> HS<br>
--<br>
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